From 740a37a2de414eb071e891685304048ae23fec5c Mon Sep 17 00:00:00 2001 From: Stypox Date: Fri, 18 Mar 2022 15:09:06 +0100 Subject: [PATCH] [YouTube] Fix checkstyle issues --- .../extractor/services/youtube/ItagItem.java | 58 +++-- .../youtube/YoutubeJavaScriptExtractor.java | 13 +- .../youtube/YoutubeParsingHelper.java | 200 +++++++++++------- .../services/youtube/YoutubeService.java | 62 +++--- .../youtube/YoutubeThrottlingDecrypter.java | 18 +- .../extractors/YoutubeChannelExtractor.java | 44 ++-- .../YoutubeChannelInfoItemExtractor.java | 24 ++- .../extractors/YoutubeCommentsExtractor.java | 3 +- .../YoutubeCommentsInfoItemExtractor.java | 40 ++-- .../extractors/YoutubeFeedExtractor.java | 7 +- .../YoutubeFeedInfoItemExtractor.java | 10 +- .../YoutubeMixPlaylistExtractor.java | 26 ++- .../YoutubeMusicSearchExtractor.java | 37 +++- .../extractors/YoutubePlaylistExtractor.java | 15 +- .../YoutubePlaylistInfoItemExtractor.java | 21 +- .../extractors/YoutubeSearchExtractor.java | 26 ++- .../extractors/YoutubeStreamExtractor.java | 149 ++++++++----- .../YoutubeStreamInfoItemExtractor.java | 89 +++++--- .../YoutubeSubscriptionExtractor.java | 13 +- .../YoutubeSuggestionExtractor.java | 32 +-- .../extractors/YoutubeTrendingExtractor.java | 9 +- .../YoutubeChannelLinkHandlerFactory.java | 42 ++-- .../YoutubeCommentsLinkHandlerFactory.java | 25 ++- .../YoutubePlaylistLinkHandlerFactory.java | 19 +- .../YoutubeSearchQueryHandlerFactory.java | 7 +- .../YoutubeStreamLinkHandlerFactory.java | 97 +++++---- .../YoutubeTrendingLinkHandlerFactory.java | 19 +- 27 files changed, 684 insertions(+), 421 deletions(-) diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/ItagItem.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/ItagItem.java index 805124eb..5ee02cc5 100644 --- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/ItagItem.java +++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/ItagItem.java @@ -1,14 +1,22 @@ package org.schabi.newpipe.extractor.services.youtube; +import static org.schabi.newpipe.extractor.MediaFormat.M4A; +import static org.schabi.newpipe.extractor.MediaFormat.MPEG_4; +import static org.schabi.newpipe.extractor.MediaFormat.WEBM; +import static org.schabi.newpipe.extractor.MediaFormat.WEBMA; +import static org.schabi.newpipe.extractor.MediaFormat.WEBMA_OPUS; +import static org.schabi.newpipe.extractor.MediaFormat.v3GPP; +import static org.schabi.newpipe.extractor.services.youtube.ItagItem.ItagType.AUDIO; +import static org.schabi.newpipe.extractor.services.youtube.ItagItem.ItagType.VIDEO; +import static org.schabi.newpipe.extractor.services.youtube.ItagItem.ItagType.VIDEO_ONLY; + import org.schabi.newpipe.extractor.MediaFormat; import org.schabi.newpipe.extractor.exceptions.ParsingException; -import static org.schabi.newpipe.extractor.MediaFormat.*; -import static org.schabi.newpipe.extractor.services.youtube.ItagItem.ItagType.*; - public class ItagItem { /** - * List can be found here https://github.com/ytdl-org/youtube-dl/blob/9fc5eafb8e384453a49f7cfe73147be491f0b19d/youtube_dl/extractor/youtube.py#L1071 + * List can be found here + * https://github.com/ytdl-org/youtube-dl/blob/9fc5eafb8e384453a49f7cfe73147be491f0b19d/youtube_dl/extractor/youtube.py#L1071 */ private static final ItagItem[] ITAG_LIST = { ///////////////////////////////////////////////////// @@ -79,8 +87,8 @@ public class ItagItem { // Utils //////////////////////////////////////////////////////////////////////////*/ - public static boolean isSupported(int itag) { - for (ItagItem item : ITAG_LIST) { + public static boolean isSupported(final int itag) { + for (final ItagItem item : ITAG_LIST) { if (itag == item.id) { return true; } @@ -88,8 +96,8 @@ public class ItagItem { return false; } - public static ItagItem getItag(int itagId) throws ParsingException { - for (ItagItem item : ITAG_LIST) { + public static ItagItem getItag(final int itagId) throws ParsingException { + for (final ItagItem item : ITAG_LIST) { if (itagId == item.id) { return item; } @@ -110,7 +118,10 @@ public class ItagItem { /** * Call {@link #ItagItem(int, ItagType, MediaFormat, String, int)} with the fps set to 30. */ - public ItagItem(int id, ItagType type, MediaFormat format, String resolution) { + public ItagItem(final int id, + final ItagType type, + final MediaFormat format, + final String resolution) { this.id = id; this.itagType = type; this.mediaFormat = format; @@ -123,7 +134,11 @@ public class ItagItem { * * @param resolution string that will be used in the frontend */ - public ItagItem(int id, ItagType type, MediaFormat format, String resolution, int fps) { + public ItagItem(final int id, + final ItagType type, + final MediaFormat format, + final String resolution, + final int fps) { this.id = id; this.itagType = type; this.mediaFormat = format; @@ -131,7 +146,10 @@ public class ItagItem { this.fps = fps; } - public ItagItem(int id, ItagType type, MediaFormat format, int avgBitrate) { + public ItagItem(final int id, + final ItagType type, + final MediaFormat format, + final int avgBitrate) { this.id = id; this.itagType = type; this.mediaFormat = format; @@ -170,7 +188,7 @@ public class ItagItem { return bitrate; } - public void setBitrate(int bitrate) { + public void setBitrate(final int bitrate) { this.bitrate = bitrate; } @@ -178,7 +196,7 @@ public class ItagItem { return width; } - public void setWidth(int width) { + public void setWidth(final int width) { this.width = width; } @@ -186,7 +204,7 @@ public class ItagItem { return height; } - public void setHeight(int height) { + public void setHeight(final int height) { this.height = height; } @@ -194,7 +212,7 @@ public class ItagItem { return initStart; } - public void setInitStart(int initStart) { + public void setInitStart(final int initStart) { this.initStart = initStart; } @@ -202,7 +220,7 @@ public class ItagItem { return initEnd; } - public void setInitEnd(int initEnd) { + public void setInitEnd(final int initEnd) { this.initEnd = initEnd; } @@ -210,7 +228,7 @@ public class ItagItem { return indexStart; } - public void setIndexStart(int indexStart) { + public void setIndexStart(final int indexStart) { this.indexStart = indexStart; } @@ -218,7 +236,7 @@ public class ItagItem { return indexEnd; } - public void setIndexEnd(int indexEnd) { + public void setIndexEnd(final int indexEnd) { this.indexEnd = indexEnd; } @@ -226,7 +244,7 @@ public class ItagItem { return quality; } - public void setQuality(String quality) { + public void setQuality(final String quality) { this.quality = quality; } @@ -234,7 +252,7 @@ public class ItagItem { return codec; } - public void setCodec(String codec) { + public void setCodec(final String codec) { this.codec = codec; } } diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeJavaScriptExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeJavaScriptExtractor.java index 92cdaec7..5813cf09 100644 --- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeJavaScriptExtractor.java +++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeJavaScriptExtractor.java @@ -19,7 +19,7 @@ import javax.annotation.Nonnull; * This class handling fetching the JavaScript file in order to allow other classes to extract the * needed functions. */ -public class YoutubeJavaScriptExtractor { +public final class YoutubeJavaScriptExtractor { private static final String HTTPS = "https:"; private static String cachedJavaScriptCode; @@ -81,9 +81,10 @@ public class YoutubeJavaScriptExtractor { final String hashPattern = "player\\\\\\/([a-z0-9]{8})\\\\\\/"; final String hash = Parser.matchGroup1(hashPattern, iframeContent); - return String.format("https://www.youtube.com/s/player/%s/player_ias.vflset/en_US/base.js", hash); - - } catch (final Exception i) { } + return String.format( + "https://www.youtube.com/s/player/%s/player_ias.vflset/en_US/base.js", hash); + } catch (final Exception ignored) { + } throw new ParsingException("Iframe API did not provide YouTube player js url"); } @@ -109,8 +110,8 @@ public class YoutubeJavaScriptExtractor { } } } - - } catch (final Exception i) { } + } catch (final Exception ignored) { + } throw new ParsingException("Embedded info did not provide YouTube player js url"); } diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeParsingHelper.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeParsingHelper.java index f9fa6e5b..bbf6168a 100644 --- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeParsingHelper.java +++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeParsingHelper.java @@ -1,5 +1,12 @@ package org.schabi.newpipe.extractor.services.youtube; +import static org.schabi.newpipe.extractor.NewPipe.getDownloader; +import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING; +import static org.schabi.newpipe.extractor.utils.Utils.HTTP; +import static org.schabi.newpipe.extractor.utils.Utils.HTTPS; +import static org.schabi.newpipe.extractor.utils.Utils.UTF_8; +import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty; + import com.grack.nanojson.JsonArray; import com.grack.nanojson.JsonBuilder; import com.grack.nanojson.JsonObject; @@ -10,7 +17,11 @@ import com.grack.nanojson.JsonWriter; import org.schabi.newpipe.extractor.MetaInfo; import org.schabi.newpipe.extractor.Page; import org.schabi.newpipe.extractor.downloader.Response; -import org.schabi.newpipe.extractor.exceptions.*; +import org.schabi.newpipe.extractor.exceptions.AccountTerminatedException; +import org.schabi.newpipe.extractor.exceptions.ContentNotAvailableException; +import org.schabi.newpipe.extractor.exceptions.ExtractionException; +import org.schabi.newpipe.extractor.exceptions.ParsingException; +import org.schabi.newpipe.extractor.exceptions.ReCaptchaException; import org.schabi.newpipe.extractor.localization.ContentCountry; import org.schabi.newpipe.extractor.localization.Localization; import org.schabi.newpipe.extractor.playlist.PlaylistInfo; @@ -28,18 +39,18 @@ import java.time.LocalDate; import java.time.OffsetDateTime; import java.time.ZoneOffset; import java.time.format.DateTimeParseException; -import java.util.*; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Objects; +import java.util.Optional; +import java.util.Random; import javax.annotation.Nonnull; import javax.annotation.Nullable; -import static org.schabi.newpipe.extractor.NewPipe.getDownloader; -import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING; -import static org.schabi.newpipe.extractor.utils.Utils.HTTP; -import static org.schabi.newpipe.extractor.utils.Utils.HTTPS; -import static org.schabi.newpipe.extractor.utils.Utils.UTF_8; -import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty; - /* * Created by Christian Schabesberger on 02.03.16. * @@ -60,7 +71,7 @@ import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty; * along with NewPipe. If not, see . */ -public class YoutubeParsingHelper { +public final class YoutubeParsingHelper { private YoutubeParsingHelper() { } @@ -99,10 +110,10 @@ public class YoutubeParsingHelper { "https://www.youtube.com/feeds/videos.xml?channel_id="; private static final String FEED_BASE_USER = "https://www.youtube.com/feeds/videos.xml?user="; - private static boolean isGoogleURL(String url) { - url = extractCachedUrlIfNeeded(url); + private static boolean isGoogleURL(final String url) { + final String cachedUrl = extractCachedUrlIfNeeded(url); try { - final URL u = new URL(url); + final URL u = new URL(cachedUrl); final String host = u.getHost(); return host.startsWith("google.") || host.startsWith("m.google.") @@ -442,7 +453,10 @@ public class YoutubeParsingHelper { private static void extractClientVersionAndKey() throws IOException, ExtractionException { // Don't extract the client version and the InnerTube key if it has been already extracted - if (keyAndVersionExtracted) return; + if (keyAndVersionExtracted) { + return; + } + // Don't provide a search term in order to have a smaller response final String url = "https://www.youtube.com/results?search_query=&ucbcb=1"; final Map> headers = new HashMap<>(); @@ -460,8 +474,8 @@ public class YoutubeParsingHelper { final JsonArray params = s.getArray("params"); for (final Object param : params) { final JsonObject p = (JsonObject) param; - final String key = p.getString("key"); - if (key != null && key.equals("cver")) { + final String paramKey = p.getString("key"); + if (paramKey != null && paramKey.equals("cver")) { clientVersion = p.getString("value"); } } @@ -471,8 +485,8 @@ public class YoutubeParsingHelper { final JsonArray params = s.getArray("params"); for (final Object param : params) { final JsonObject p = (JsonObject) param; - final String key = p.getString("key"); - if (key != null && key.equals("client.version")) { + final String paramKey = p.getString("key"); + if (paramKey != null && paramKey.equals("client.version")) { shortClientVersion = p.getString("value"); } } @@ -516,9 +530,12 @@ public class YoutubeParsingHelper { * Get the client version */ public static String getClientVersion() throws IOException, ExtractionException { - if (!isNullOrEmpty(clientVersion)) return clientVersion; + if (!isNullOrEmpty(clientVersion)) { + return clientVersion; + } if (areHardcodedClientVersionAndKeyValid()) { - return clientVersion = HARDCODED_CLIENT_VERSION; + clientVersion = HARDCODED_CLIENT_VERSION; + return clientVersion; } extractClientVersionAndKey(); @@ -529,9 +546,12 @@ public class YoutubeParsingHelper { * Get the key */ public static String getKey() throws IOException, ExtractionException { - if (!isNullOrEmpty(key)) return key; + if (!isNullOrEmpty(key)) { + return key; + } if (areHardcodedClientVersionAndKeyValid()) { - return key = HARDCODED_KEY; + key = HARDCODED_KEY; + return key; } extractClientVersionAndKey(); @@ -574,7 +594,7 @@ public class YoutubeParsingHelper { + HARDCODED_YOUTUBE_MUSIC_KEY[0]; // @formatter:off - byte[] json = JsonWriter.string() + final byte[] json = JsonWriter.string() .object() .object("context") .object("client") @@ -617,9 +637,12 @@ public class YoutubeParsingHelper { public static String[] getYoutubeMusicKey() throws IOException, ReCaptchaException, Parser.RegexException { - if (youtubeMusicKey != null && youtubeMusicKey.length == 3) return youtubeMusicKey; + if (youtubeMusicKey != null && youtubeMusicKey.length == 3) { + return youtubeMusicKey; + } if (isHardcodedYoutubeMusicKeyValid()) { - return youtubeMusicKey = HARDCODED_YOUTUBE_MUSIC_KEY; + youtubeMusicKey = HARDCODED_YOUTUBE_MUSIC_KEY; + return youtubeMusicKey; } final String url = "https://music.youtube.com/"; @@ -627,31 +650,36 @@ public class YoutubeParsingHelper { addCookieHeader(headers); final String html = getDownloader().get(url, headers).responseBody(); - String key; + String innertubeApiKey; try { - key = Parser.matchGroup1("INNERTUBE_API_KEY\":\"([0-9a-zA-Z_-]+?)\"", html); + innertubeApiKey = Parser.matchGroup1("INNERTUBE_API_KEY\":\"([0-9a-zA-Z_-]+?)\"", html); } catch (final Parser.RegexException e) { - key = Parser.matchGroup1("innertube_api_key\":\"([0-9a-zA-Z_-]+?)\"", html); + innertubeApiKey = Parser.matchGroup1("innertube_api_key\":\"([0-9a-zA-Z_-]+?)\"", html); } - final String clientName = Parser.matchGroup1("INNERTUBE_CONTEXT_CLIENT_NAME\":([0-9]+?),", - html); + final String innertubeClientName + = Parser.matchGroup1("INNERTUBE_CONTEXT_CLIENT_NAME\":([0-9]+?),", html); - String clientVersion; + String innertubeClientVersion; try { - clientVersion = Parser.matchGroup1( + innertubeClientVersion = Parser.matchGroup1( "INNERTUBE_CONTEXT_CLIENT_VERSION\":\"([0-9\\.]+?)\"", html); } catch (final Parser.RegexException e) { try { - clientVersion = Parser.matchGroup1( + innertubeClientVersion = Parser.matchGroup1( "INNERTUBE_CLIENT_VERSION\":\"([0-9\\.]+?)\"", html); } catch (final Parser.RegexException ee) { - clientVersion = Parser.matchGroup1( + innertubeClientVersion = Parser.matchGroup1( "innertube_context_client_version\":\"([0-9\\.]+?)\"", html); } } - return youtubeMusicKey = new String[]{key, clientName, clientVersion}; + youtubeMusicKey = new String[]{ + innertubeApiKey, + innertubeClientName, + innertubeClientVersion + }; + return youtubeMusicKey; } @Nullable @@ -667,16 +695,14 @@ public class YoutubeParsingHelper { if (internUrl.startsWith("/redirect?")) { // q parameter can be the first parameter internUrl = internUrl.substring(10); - String[] params = internUrl.split("&"); - for (String param : params) { + final String[] params = internUrl.split("&"); + for (final String param : params) { if (param.split("=")[0].equals("q")) { - String url; try { - url = URLDecoder.decode(param.split("=")[1], UTF_8); + return URLDecoder.decode(param.split("=")[1], UTF_8); } catch (final UnsupportedEncodingException e) { return null; } - return url; } } } else if (internUrl.startsWith("http")) { @@ -702,7 +728,7 @@ public class YoutubeParsingHelper { throw new ParsingException("canonicalBaseUrl is null and browseId is not a channel (\"" + browseEndpoint + "\")"); } else if (navigationEndpoint.has("watchEndpoint")) { - StringBuilder url = new StringBuilder(); + final StringBuilder url = new StringBuilder(); url.append("https://www.youtube.com/watch?v=").append(navigationEndpoint .getObject("watchEndpoint").getString("videoId")); if (navigationEndpoint.getObject("watchEndpoint").has("playlistId")) { @@ -715,8 +741,8 @@ public class YoutubeParsingHelper { } return url.toString(); } else if (navigationEndpoint.has("watchPlaylistEndpoint")) { - return "https://www.youtube.com/playlist?list=" + - navigationEndpoint.getObject("watchPlaylistEndpoint").getString("playlistId"); + return "https://www.youtube.com/playlist?list=" + + navigationEndpoint.getObject("watchPlaylistEndpoint").getString("playlistId"); } return null; } @@ -731,17 +757,23 @@ public class YoutubeParsingHelper { @Nullable public static String getTextFromObject(final JsonObject textObject, final boolean html) throws ParsingException { - if (isNullOrEmpty(textObject)) return null; + if (isNullOrEmpty(textObject)) { + return null; + } - if (textObject.has("simpleText")) return textObject.getString("simpleText"); + if (textObject.has("simpleText")) { + return textObject.getString("simpleText"); + } - if (textObject.getArray("runs").isEmpty()) return null; + if (textObject.getArray("runs").isEmpty()) { + return null; + } final StringBuilder textBuilder = new StringBuilder(); for (final Object textPart : textObject.getArray("runs")) { - String text = ((JsonObject) textPart).getString("text"); + final String text = ((JsonObject) textPart).getString("text"); if (html && ((JsonObject) textPart).has("navigationEndpoint")) { - String url = getUrlFromNavigationEndpoint(((JsonObject) textPart) + final String url = getUrlFromNavigationEndpoint(((JsonObject) textPart) .getObject("navigationEndpoint")); if (!isNullOrEmpty(url)) { textBuilder.append("").append(text) @@ -768,27 +800,28 @@ public class YoutubeParsingHelper { } @Nullable - public static String getTextAtKey(@Nonnull final JsonObject jsonObject, final String key) + public static String getTextAtKey(@Nonnull final JsonObject jsonObject, final String theKey) throws ParsingException { - if (jsonObject.isString(key)) { - return jsonObject.getString(key); + if (jsonObject.isString(theKey)) { + return jsonObject.getString(theKey); } else { - return getTextFromObject(jsonObject.getObject(key)); + return getTextFromObject(jsonObject.getObject(theKey)); } } - public static String fixThumbnailUrl(@Nonnull String thumbnailUrl) { - if (thumbnailUrl.startsWith("//")) { - thumbnailUrl = thumbnailUrl.substring(2); + public static String fixThumbnailUrl(@Nonnull final String thumbnailUrl) { + String result = thumbnailUrl; + if (result.startsWith("//")) { + result = result.substring(2); } - if (thumbnailUrl.startsWith(HTTP)) { - thumbnailUrl = Utils.replaceHttpWithHttps(thumbnailUrl); - } else if (!thumbnailUrl.startsWith(HTTPS)) { - thumbnailUrl = "https://" + thumbnailUrl; + if (result.startsWith(HTTP)) { + result = Utils.replaceHttpWithHttps(result); + } else if (!result.startsWith(HTTPS)) { + result = "https://" + result; } - return thumbnailUrl; + return result; } public static String getThumbnailUrlFromInfoItem(final JsonObject infoItem) @@ -882,7 +915,7 @@ public class YoutubeParsingHelper { public static JsonArray getJsonResponse(final String url, final Localization localization) throws IOException, ExtractionException { - Map> headers = new HashMap<>(); + final Map> headers = new HashMap<>(); addYouTubeHeaders(headers); final Response response = getDownloader().get(url, headers, localization); @@ -1011,7 +1044,8 @@ public class YoutubeParsingHelper { throws IOException, ExtractionException { if (withThirdParty) { // @formatter:off - return JsonWriter.string(prepareDesktopEmbedVideoJsonBuilder(localization, contentCountry, videoId) + return JsonWriter.string(prepareDesktopEmbedVideoJsonBuilder( + localization, contentCountry, videoId) .object("playbackContext") .object("contentPlaybackContext") .value("signatureTimestamp", sts) @@ -1070,7 +1104,7 @@ public class YoutubeParsingHelper { */ public static void addCookieHeader(@Nonnull final Map> headers) { if (headers.get("Cookie") == null) { - headers.put("Cookie", Arrays.asList(generateConsentCookie())); + headers.put("Cookie", Collections.singletonList(generateConsentCookie())); } else { headers.get("Cookie").add(generateConsentCookie()); } @@ -1121,15 +1155,27 @@ public class YoutubeParsingHelper { if (alertText.contains("violation") || alertText.contains("violating") || alertText.contains("infringement")) { // Possible error messages: - // "This account has been terminated for a violation of YouTube's Terms of Service." - // "This account has been terminated due to multiple or severe violations of YouTube's policy prohibiting hate speech." - // "This account has been terminated due to multiple or severe violations of YouTube's policy prohibiting content designed to harass, bully or threaten." - // "This account has been terminated due to multiple or severe violations of YouTube's policy against spam, deceptive practices and misleading content or other Terms of Service violations." - // "This account has been terminated due to multiple or severe violations of YouTube's policy on nudity or sexual content." - // "This account has been terminated for violating YouTube's Community Guidelines." - // "This account has been terminated because we received multiple third-party claims of copyright infringement regarding material that the user posted." - // "This account has been terminated because it is linked to an account that received multiple third-party claims of copyright infringement." - throw new AccountTerminatedException(alertText, AccountTerminatedException.Reason.VIOLATION); + // "This account has been terminated for a violation of YouTube's Terms of + // Service." + // "This account has been terminated due to multiple or severe violations of + // YouTube's policy prohibiting hate speech." + // "This account has been terminated due to multiple or severe violations of + // YouTube's policy prohibiting content designed to harass, bully or + // threaten." + // "This account has been terminated due to multiple or severe violations + // of YouTube's policy against spam, deceptive practices and misleading + // content or other Terms of Service violations." + // "This account has been terminated due to multiple or severe violations of + // YouTube's policy on nudity or sexual content." + // "This account has been terminated for violating YouTube's Community + // Guidelines." + // "This account has been terminated because we received multiple + // third-party claims of copyright infringement regarding material that + // the user posted." + // "This account has been terminated because it is linked to an account that + // received multiple third-party claims of copyright infringement." + throw new AccountTerminatedException(alertText, + AccountTerminatedException.Reason.VIOLATION); } else { throw new AccountTerminatedException(alertText); } @@ -1146,8 +1192,8 @@ public class YoutubeParsingHelper { for (final Object content : contents) { final JsonObject resultObject = (JsonObject) content; if (resultObject.has("itemSectionRenderer")) { - for (final Object sectionContentObject : - resultObject.getObject("itemSectionRenderer").getArray("contents")) { + for (final Object sectionContentObject + : resultObject.getObject("itemSectionRenderer").getArray("contents")) { final JsonObject sectionContent = (JsonObject) sectionContentObject; if (sectionContent.has("infoPanelContentRenderer")) { @@ -1200,8 +1246,8 @@ public class YoutubeParsingHelper { } @Nonnull - private static MetaInfo getClarificationRendererContent(@Nonnull final JsonObject clarificationRenderer) - throws ParsingException { + private static MetaInfo getClarificationRendererContent( + @Nonnull final JsonObject clarificationRenderer) throws ParsingException { final MetaInfo metaInfo = new MetaInfo(); final String title = YoutubeParsingHelper.getTextFromObject(clarificationRenderer @@ -1275,7 +1321,7 @@ public class YoutubeParsingHelper { return false; } - for (Object badge : badges) { + for (final Object badge : badges) { final String style = ((JsonObject) badge).getObject("metadataBadgeRenderer") .getString("style"); if (style != null && (style.equals("BADGE_STYLE_TYPE_VERIFIED") diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeService.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeService.java index ca0e3a26..a15d3ed0 100644 --- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeService.java +++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeService.java @@ -1,11 +1,16 @@ package org.schabi.newpipe.extractor.services.youtube; +import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.AUDIO; +import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.COMMENTS; +import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.LIVE; +import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.VIDEO; +import static java.util.Arrays.asList; + import org.schabi.newpipe.extractor.StreamingService; import org.schabi.newpipe.extractor.channel.ChannelExtractor; import org.schabi.newpipe.extractor.comments.CommentsExtractor; import org.schabi.newpipe.extractor.exceptions.ExtractionException; import org.schabi.newpipe.extractor.feed.FeedExtractor; -import org.schabi.newpipe.extractor.kiosk.KioskExtractor; import org.schabi.newpipe.extractor.kiosk.KioskList; import org.schabi.newpipe.extractor.linkhandler.LinkHandler; import org.schabi.newpipe.extractor.linkhandler.LinkHandlerFactory; @@ -42,12 +47,6 @@ import java.util.List; import javax.annotation.Nonnull; -import static java.util.Arrays.asList; -import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.AUDIO; -import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.COMMENTS; -import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.LIVE; -import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.VIDEO; - /* * Created by Christian Schabesberger on 23.08.15. * @@ -70,7 +69,7 @@ import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCap public class YoutubeService extends StreamingService { - public YoutubeService(int id) { + public YoutubeService(final int id) { super(id, "YouTube", asList(AUDIO, VIDEO, LIVE, COMMENTS)); } @@ -100,12 +99,12 @@ public class YoutubeService extends StreamingService { } @Override - public StreamExtractor getStreamExtractor(LinkHandler linkHandler) { + public StreamExtractor getStreamExtractor(final LinkHandler linkHandler) { return new YoutubeStreamExtractor(this, linkHandler); } @Override - public ChannelExtractor getChannelExtractor(ListLinkHandler linkHandler) { + public ChannelExtractor getChannelExtractor(final ListLinkHandler linkHandler) { return new YoutubeChannelExtractor(this, linkHandler); } @@ -120,7 +119,7 @@ public class YoutubeService extends StreamingService { } @Override - public SearchExtractor getSearchExtractor(SearchQueryHandler query) { + public SearchExtractor getSearchExtractor(final SearchQueryHandler query) { final List contentFilters = query.getContentFilters(); if (!contentFilters.isEmpty() && contentFilters.get(0).startsWith("music_")) { @@ -137,22 +136,21 @@ public class YoutubeService extends StreamingService { @Override public KioskList getKioskList() throws ExtractionException { - KioskList list = new KioskList(this); + final KioskList list = new KioskList(this); // add kiosks here e.g.: try { - list.addKioskEntry(new KioskList.KioskExtractorFactory() { - @Override - public KioskExtractor createNewKiosk(StreamingService streamingService, - String url, - String id) - throws ExtractionException { - return new YoutubeTrendingExtractor(YoutubeService.this, - new YoutubeTrendingLinkHandlerFactory().fromUrl(url), id); - } - }, new YoutubeTrendingLinkHandlerFactory(), "Trending"); + list.addKioskEntry( + (streamingService, url, id) -> new YoutubeTrendingExtractor( + YoutubeService.this, + new YoutubeTrendingLinkHandlerFactory().fromUrl(url), + id + ), + new YoutubeTrendingLinkHandlerFactory(), + "Trending" + ); list.setDefaultKiosk("Trending"); - } catch (Exception e) { + } catch (final Exception e) { throw new ExtractionException(e); } @@ -176,7 +174,7 @@ public class YoutubeService extends StreamingService { } @Override - public CommentsExtractor getCommentsExtractor(ListLinkHandler urlIdHandler) + public CommentsExtractor getCommentsExtractor(final ListLinkHandler urlIdHandler) throws ExtractionException { return new YoutubeCommentsExtractor(this, urlIdHandler); } @@ -199,14 +197,14 @@ public class YoutubeService extends StreamingService { // https://www.youtube.com/picker_ajax?action_country_json=1 private static final List SUPPORTED_COUNTRIES = ContentCountry.listFrom( - "DZ", "AR", "AU", "AT", "AZ", "BH", "BD", "BY", "BE", "BO", "BA", "BR", "BG", "CA", "CL", - "CO", "CR", "HR", "CY", "CZ", "DK", "DO", "EC", "EG", "SV", "EE", "FI", "FR", "GE", "DE", - "GH", "GR", "GT", "HN", "HK", "HU", "IS", "IN", "ID", "IQ", "IE", "IL", "IT", "JM", "JP", - "JO", "KZ", "KE", "KW", "LV", "LB", "LY", "LI", "LT", "LU", "MY", "MT", "MX", "ME", "MA", - "NP", "NL", "NZ", "NI", "NG", "MK", "NO", "OM", "PK", "PA", "PG", "PY", "PE", "PH", "PL", - "PT", "PR", "QA", "RO", "RU", "SA", "SN", "RS", "SG", "SK", "SI", "ZA", "KR", "ES", "LK", - "SE", "CH", "TW", "TZ", "TH", "TN", "TR", "UG", "UA", "AE", "GB", "US", "UY", "VE", "VN", - "YE", "ZW" + "DZ", "AR", "AU", "AT", "AZ", "BH", "BD", "BY", "BE", "BO", "BA", "BR", "BG", "CA", + "CL", "CO", "CR", "HR", "CY", "CZ", "DK", "DO", "EC", "EG", "SV", "EE", "FI", "FR", + "GE", "DE", "GH", "GR", "GT", "HN", "HK", "HU", "IS", "IN", "ID", "IQ", "IE", "IL", + "IT", "JM", "JP", "JO", "KZ", "KE", "KW", "LV", "LB", "LY", "LI", "LT", "LU", "MY", + "MT", "MX", "ME", "MA", "NP", "NL", "NZ", "NI", "NG", "MK", "NO", "OM", "PK", "PA", + "PG", "PY", "PE", "PH", "PL", "PT", "PR", "QA", "RO", "RU", "SA", "SN", "RS", "SG", + "SK", "SI", "ZA", "KR", "ES", "LK", "SE", "CH", "TW", "TZ", "TH", "TN", "TR", "UG", + "UA", "AE", "GB", "US", "UY", "VE", "VN", "YE", "ZW" ); @Override diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeThrottlingDecrypter.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeThrottlingDecrypter.java index 02566c4b..ce4241f1 100644 --- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeThrottlingDecrypter.java +++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeThrottlingDecrypter.java @@ -80,7 +80,8 @@ public class YoutubeThrottlingDecrypter { public static String apply(final String url, final String videoId) throws ParsingException { if (containsNParam(url)) { if (FUNCTION == null) { - final String playerJsCode = YoutubeJavaScriptExtractor.extractJavaScriptCode(videoId); + final String playerJsCode + = YoutubeJavaScriptExtractor.extractJavaScriptCode(videoId); FUNCTION_NAME = parseDecodeFunctionName(playerJsCode); FUNCTION = parseDecodeFunction(playerJsCode, FUNCTION_NAME); @@ -118,19 +119,22 @@ public class YoutubeThrottlingDecrypter { throws Parser.RegexException { try { return parseWithParenthesisMatching(playerJsCode, functionName); - } catch (Exception e) { + } catch (final Exception e) { return parseWithRegex(playerJsCode, functionName); } } @Nonnull - private static String parseWithParenthesisMatching(final String playerJsCode, final String functionName) { + private static String parseWithParenthesisMatching(final String playerJsCode, + final String functionName) { final String functionBase = functionName + "=function"; - return functionBase + StringUtils.matchToClosingParenthesis(playerJsCode, functionBase) + ";"; + return functionBase + StringUtils.matchToClosingParenthesis(playerJsCode, functionBase) + + ";"; } @Nonnull - private static String parseWithRegex(final String playerJsCode, final String functionName) throws Parser.RegexException { + private static String parseWithRegex(final String playerJsCode, final String functionName) + throws Parser.RegexException { final Pattern functionPattern = Pattern.compile(functionName + "=function(.*?}};)\n", Pattern.DOTALL); return "function " + functionName + Parser.matchGroup1(functionPattern, playerJsCode); @@ -155,7 +159,9 @@ public class YoutubeThrottlingDecrypter { return Parser.matchGroup1(N_PARAM_PATTERN, url); } - private static String decryptNParam(final String function, final String functionName, final String nParam) { + private static String decryptNParam(final String function, + final String functionName, + final String nParam) { if (N_PARAMS_CACHE.containsKey(nParam)) { return N_PARAMS_CACHE.get(nParam); } diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeChannelExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeChannelExtractor.java index acc1fa11..ec04e358 100644 --- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeChannelExtractor.java +++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeChannelExtractor.java @@ -1,5 +1,17 @@ package org.schabi.newpipe.extractor.services.youtube.extractors; +import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.YOUTUBEI_V1_URL; +import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.addClientInfoHeaders; +import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.fixThumbnailUrl; +import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getJsonPostResponse; +import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getKey; +import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject; +import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getValidJsonResponseBody; +import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopJsonBuilder; +import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING; +import static org.schabi.newpipe.extractor.utils.Utils.UTF_8; +import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty; + import com.grack.nanojson.JsonArray; import com.grack.nanojson.JsonObject; import com.grack.nanojson.JsonWriter; @@ -31,11 +43,6 @@ import java.util.Map; import javax.annotation.Nonnull; import javax.annotation.Nullable; -import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.*; -import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING; -import static org.schabi.newpipe.extractor.utils.Utils.UTF_8; -import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty; - /* * Created by Christian Schabesberger on 25.07.16. * @@ -56,13 +63,12 @@ import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty; * along with NewPipe. If not, see . */ -@SuppressWarnings("WeakerAccess") public class YoutubeChannelExtractor extends ChannelExtractor { private JsonObject initialData; private JsonObject videoTab; /** - * Some channels have response redirects and the only way to reliably get the id is by saving it. + * Some channels have response redirects and the only way to reliably get the id is by saving it *

* "Movies & Shows": * 

@@ -233,7 +239,7 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
     @Override
     public String getAvatarUrl() throws ParsingException {
         try {
-            String url = initialData.getObject("header")
+            final String url = initialData.getObject("header")
                     .getObject("c4TabbedHeaderRenderer").getObject("avatar").getArray("thumbnails")
                     .getObject(0).getString("url");
 
@@ -246,7 +252,7 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
     @Override
     public String getBannerUrl() throws ParsingException {
         try {
-            String url = initialData.getObject("header")
+            final String url = initialData.getObject("header")
                     .getObject("c4TabbedHeaderRenderer").getObject("banner").getArray("thumbnails")
                     .getObject(0).getString("url");
 
@@ -361,7 +367,7 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
 
         final JsonObject ajaxJson = JsonUtils.toJsonObject(getValidJsonResponseBody(response));
 
-        JsonObject sectionListContinuation = ajaxJson.getArray("onResponseReceivedActions")
+        final JsonObject sectionListContinuation = ajaxJson.getArray("onResponseReceivedActions")
                 .getObject(0)
                 .getObject("appendContinuationItemsAction");
 
@@ -436,28 +442,30 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
 
     @Nullable
     private JsonObject getVideoTab() throws ParsingException {
-        if (this.videoTab != null) return this.videoTab;
+        if (this.videoTab != null) {
+            return this.videoTab;
+        }
 
-        JsonArray tabs = initialData.getObject("contents")
+        final JsonArray tabs = initialData.getObject("contents")
                 .getObject("twoColumnBrowseResultsRenderer")
                 .getArray("tabs");
-        JsonObject videoTab = null;
 
+        JsonObject foundVideoTab = null;
         for (final Object tab : tabs) {
             if (((JsonObject) tab).has("tabRenderer")) {
                 if (((JsonObject) tab).getObject("tabRenderer").getString("title",
                         EMPTY_STRING).equals("Videos")) {
-                    videoTab = ((JsonObject) tab).getObject("tabRenderer");
+                    foundVideoTab = ((JsonObject) tab).getObject("tabRenderer");
                     break;
                 }
             }
         }
 
-        if (videoTab == null) {
+        if (foundVideoTab == null) {
             throw new ContentNotSupportedException("This channel has no Videos tab");
         }
 
-        final String messageRendererText = getTextFromObject(videoTab.getObject("content")
+        final String messageRendererText = getTextFromObject(foundVideoTab.getObject("content")
                 .getObject("sectionListRenderer").getArray("contents").getObject(0)
                 .getObject("itemSectionRenderer").getArray("contents").getObject(0)
                 .getObject("messageRenderer").getObject("text"));
@@ -466,7 +474,7 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
             return null;
         }
 
-        this.videoTab = videoTab;
-        return videoTab;
+        this.videoTab = foundVideoTab;
+        return foundVideoTab;
     }
 }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeChannelInfoItemExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeChannelInfoItemExtractor.java
index 27bc1920..1193de76 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeChannelInfoItemExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeChannelInfoItemExtractor.java
@@ -33,19 +33,20 @@ import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper
  */
 
 public class YoutubeChannelInfoItemExtractor implements ChannelInfoItemExtractor {
-    private JsonObject channelInfoItem;
+    private final JsonObject channelInfoItem;
 
-    public YoutubeChannelInfoItemExtractor(JsonObject channelInfoItem) {
+    public YoutubeChannelInfoItemExtractor(final JsonObject channelInfoItem) {
         this.channelInfoItem = channelInfoItem;
     }
 
     @Override
     public String getThumbnailUrl() throws ParsingException {
         try {
-            String url = channelInfoItem.getObject("thumbnail").getArray("thumbnails").getObject(0).getString("url");
+            final String url = channelInfoItem.getObject("thumbnail").getArray("thumbnails")
+                    .getObject(0).getString("url");
 
             return fixThumbnailUrl(url);
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get thumbnail url", e);
         }
     }
@@ -54,7 +55,7 @@ public class YoutubeChannelInfoItemExtractor implements ChannelInfoItemExtractor
     public String getName() throws ParsingException {
         try {
             return getTextFromObject(channelInfoItem.getObject("title"));
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get name", e);
         }
     }
@@ -62,9 +63,9 @@ public class YoutubeChannelInfoItemExtractor implements ChannelInfoItemExtractor
     @Override
     public String getUrl() throws ParsingException {
         try {
-            String id = "channel/" + channelInfoItem.getString("channelId");
+            final String id = "channel/" + channelInfoItem.getString("channelId");
             return YoutubeChannelLinkHandlerFactory.getInstance().getUrl(id);
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get url", e);
         }
     }
@@ -77,8 +78,9 @@ public class YoutubeChannelInfoItemExtractor implements ChannelInfoItemExtractor
                 return -1;
             }
 
-            return Utils.mixedNumberWordToLong(getTextFromObject(channelInfoItem.getObject("subscriberCountText")));
-        } catch (Exception e) {
+            return Utils.mixedNumberWordToLong(getTextFromObject(
+                    channelInfoItem.getObject("subscriberCountText")));
+        } catch (final Exception e) {
             throw new ParsingException("Could not get subscriber count", e);
         }
     }
@@ -93,7 +95,7 @@ public class YoutubeChannelInfoItemExtractor implements ChannelInfoItemExtractor
 
             return Long.parseLong(Utils.removeNonDigitCharacters(getTextFromObject(
                     channelInfoItem.getObject("videoCountText"))));
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get stream count", e);
         }
     }
@@ -112,7 +114,7 @@ public class YoutubeChannelInfoItemExtractor implements ChannelInfoItemExtractor
             }
 
             return getTextFromObject(channelInfoItem.getObject("descriptionSnippet"));
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get description", e);
         }
     }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsExtractor.java
index f62b60f6..e2481952 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsExtractor.java
@@ -103,7 +103,8 @@ public class YoutubeCommentsExtractor extends CommentsExtractor {
                                 itemSectionRenderer
                                         .getObject("itemSectionRenderer")
                                         .getArray("contents").getObject(0),
-                                "continuationItemRenderer.continuationEndpoint.continuationCommand.token");
+                                "continuationItemRenderer.continuationEndpoint"
+                                        + ".continuationCommand.token");
                     } catch (final ParsingException ignored) {
                         return null;
                     }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsInfoItemExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsInfoItemExtractor.java
index 29a3dd93..f6d86f7c 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsInfoItemExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsInfoItemExtractor.java
@@ -1,9 +1,11 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
+import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
 
-import com.grack.nanojson.JsonWriter;
 import org.schabi.newpipe.extractor.Page;
 import org.schabi.newpipe.extractor.comments.CommentsInfoItemExtractor;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
@@ -14,9 +16,6 @@ import org.schabi.newpipe.extractor.utils.Utils;
 
 import javax.annotation.Nullable;
 
-import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-
 public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtractor {
 
     private final JsonObject json;
@@ -33,11 +32,12 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
     }
 
     private JsonObject getCommentRenderer() throws ParsingException {
-        if(commentRenderer == null) {
-            if(!json.has("comment"))
-                commentRenderer = json;
-            else
+        if (commentRenderer == null) {
+            if (json.has("comment")) {
                 commentRenderer = JsonUtils.getObject(json, "comment.commentRenderer");
+            } else {
+                commentRenderer = json;
+            }
         }
         return commentRenderer;
     }
@@ -50,7 +50,8 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
     @Override
     public String getThumbnailUrl() throws ParsingException {
         try {
-            final JsonArray arr = JsonUtils.getArray(getCommentRenderer(), "authorThumbnail.thumbnails");
+            final JsonArray arr = JsonUtils.getArray(getCommentRenderer(),
+                    "authorThumbnail.thumbnails");
             return JsonUtils.getString(arr.getObject(2), "url");
         } catch (final Exception e) {
             throw new ParsingException("Could not get thumbnail url", e);
@@ -69,7 +70,8 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
     @Override
     public String getTextualUploadDate() throws ParsingException {
         try {
-            return getTextFromObject(JsonUtils.getObject(getCommentRenderer(), "publishedTimeText"));
+            return getTextFromObject(JsonUtils.getObject(getCommentRenderer(),
+                    "publishedTimeText"));
         } catch (final Exception e) {
             throw new ParsingException("Could not get publishedTimeText", e);
         }
@@ -78,7 +80,7 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
     @Nullable
     @Override
     public DateWrapper getUploadDate() throws ParsingException {
-        String textualPublishedTime = getTextualUploadDate();
+        final String textualPublishedTime = getTextualUploadDate();
         if (timeAgoParser != null && textualPublishedTime != null
                 && !textualPublishedTime.isEmpty()) {
             return timeAgoParser.parse(textualPublishedTime);
@@ -108,7 +110,8 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
         final String likeCount;
         try {
             likeCount = Utils.removeNonDigitCharacters(JsonUtils.getString(getCommentRenderer(),
-                    "actionButtons.commentActionButtonsRenderer.likeButton.toggleButtonRenderer.accessibilityData.accessibilityData.label"));
+                    "actionButtons.commentActionButtonsRenderer.likeButton.toggleButtonRenderer"
+                            + ".accessibilityData.accessibilityData.label"));
         } catch (final Exception e) {
             // Use the approximate like count returned into the voteCount object
             // This may return a language dependent version, e.g. in German: 3,3 Mio
@@ -202,7 +205,8 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
     @Override
     public String getUploaderAvatarUrl() throws ParsingException {
         try {
-            JsonArray arr = JsonUtils.getArray(getCommentRenderer(), "authorThumbnail.thumbnails");
+            final JsonArray arr = JsonUtils.getArray(getCommentRenderer(),
+                    "authorThumbnail.thumbnails");
             return JsonUtils.getString(arr.getObject(2), "url");
         } catch (final Exception e) {
             throw new ParsingException("Could not get author thumbnail", e);
@@ -211,7 +215,8 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
 
     @Override
     public boolean isHeartedByUploader() throws ParsingException {
-        final JsonObject commentActionButtonsRenderer = getCommentRenderer().getObject("actionButtons")
+        final JsonObject commentActionButtonsRenderer = getCommentRenderer()
+                .getObject("actionButtons")
                 .getObject("commentActionButtonsRenderer");
         return commentActionButtonsRenderer.has("creatorHeart");
     }
@@ -247,10 +252,13 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
     @Override
     public Page getReplies() throws ParsingException {
         try {
-            final String id = JsonUtils.getString(JsonUtils.getArray(json, "replies.commentRepliesRenderer.contents").getObject(0), "continuationItemRenderer.continuationEndpoint.continuationCommand.token");
+            final String id = JsonUtils.getString(
+                    JsonUtils.getArray(json, "replies.commentRepliesRenderer.contents")
+                            .getObject(0),
+                    "continuationItemRenderer.continuationEndpoint.continuationCommand.token");
             return new Page(url, id);
         } catch (final Exception e) {
-            return null; // Would return null for Comment Replies, since YouTube does not support nested replies.
+            return null;
         }
     }
 }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeFeedExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeFeedExtractor.java
index dc9f60b4..e3369d1e 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeFeedExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeFeedExtractor.java
@@ -22,14 +22,15 @@ import java.io.IOException;
 import javax.annotation.Nonnull;
 
 public class YoutubeFeedExtractor extends FeedExtractor {
-    public YoutubeFeedExtractor(StreamingService service, ListLinkHandler linkHandler) {
+    public YoutubeFeedExtractor(final StreamingService service, final ListLinkHandler linkHandler) {
         super(service, linkHandler);
     }
 
     private Document document;
 
     @Override
-    public void onFetchPage(@Nonnull Downloader downloader) throws IOException, ExtractionException {
+    public void onFetchPage(@Nonnull final Downloader downloader)
+            throws IOException, ExtractionException {
         final String channelIdOrUser = getLinkHandler().getId();
         final String feedUrl = YoutubeParsingHelper.getFeedUrlFrom(channelIdOrUser);
 
@@ -46,7 +47,7 @@ public class YoutubeFeedExtractor extends FeedExtractor {
         final Elements entries = document.select("feed > entry");
         final StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
 
-        for (Element entryElement : entries) {
+        for (final Element entryElement : entries) {
             collector.commit(new YoutubeFeedInfoItemExtractor(entryElement));
         }
 
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeFeedInfoItemExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeFeedInfoItemExtractor.java
index a0bd8917..a79586e8 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeFeedInfoItemExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeFeedInfoItemExtractor.java
@@ -13,7 +13,7 @@ import java.time.format.DateTimeParseException;
 public class YoutubeFeedInfoItemExtractor implements StreamInfoItemExtractor {
     private final Element entryElement;
 
-    public YoutubeFeedInfoItemExtractor(Element entryElement) {
+    public YoutubeFeedInfoItemExtractor(final Element entryElement) {
         this.entryElement = entryElement;
     }
 
@@ -37,7 +37,8 @@ public class YoutubeFeedInfoItemExtractor implements StreamInfoItemExtractor {
 
     @Override
     public long getViewCount() {
-        return Long.parseLong(entryElement.getElementsByTag("media:statistics").first().attr("views"));
+        return Long.parseLong(entryElement.getElementsByTag("media:statistics").first()
+                .attr("views"));
     }
 
     @Override
@@ -72,8 +73,9 @@ public class YoutubeFeedInfoItemExtractor implements StreamInfoItemExtractor {
     public DateWrapper getUploadDate() throws ParsingException {
         try {
             return new DateWrapper(OffsetDateTime.parse(getTextualUploadDate()));
-        } catch (DateTimeParseException e) {
-            throw new ParsingException("Could not parse date (\"" + getTextualUploadDate() + "\")", e);
+        } catch (final DateTimeParseException e) {
+            throw new ParsingException("Could not parse date (\"" + getTextualUploadDate() + "\")",
+                    e);
         }
     }
 
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMixPlaylistExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMixPlaylistExtractor.java
index b1f3e28c..00f222db 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMixPlaylistExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMixPlaylistExtractor.java
@@ -1,10 +1,21 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.YOUTUBEI_V1_URL;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.addClientInfoHeaders;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.extractCookieValue;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getKey;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getValidJsonResponseBody;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopJsonBuilder;
+import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+import static org.schabi.newpipe.extractor.utils.Utils.getQueryValue;
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+import static org.schabi.newpipe.extractor.utils.Utils.stringToURL;
+
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonBuilder;
 import com.grack.nanojson.JsonObject;
-
 import com.grack.nanojson.JsonWriter;
+
 import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.Page;
 import org.schabi.newpipe.extractor.StreamingService;
@@ -25,14 +36,14 @@ import org.schabi.newpipe.extractor.utils.JsonUtils;
 import java.io.IOException;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
-import java.util.*;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
-import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.*;
-import static org.schabi.newpipe.extractor.utils.Utils.*;
-
 /**
  * A {@link YoutubePlaylistExtractor} for a mix (auto-generated playlist).
  * It handles URLs in the format of
@@ -84,8 +95,9 @@ public class YoutubeMixPlaylistExtractor extends PlaylistExtractor {
         initialData = JsonUtils.toJsonObject(getValidJsonResponseBody(response));
         playlistData = initialData.getObject("contents").getObject("twoColumnWatchNextResults")
                 .getObject("playlist").getObject("playlist");
-        if (isNullOrEmpty(playlistData)) throw new ExtractionException(
-                "Could not get playlistData");
+        if (isNullOrEmpty(playlistData)) {
+            throw new ExtractionException("Could not get playlistData");
+        }
         cookieValue = extractCookieValue(COOKIE_NAME, response);
     }
 
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMusicSearchExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMusicSearchExtractor.java
index 5f7cbc6c..28bed811 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMusicSearchExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMusicSearchExtractor.java
@@ -1,6 +1,24 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
-import com.grack.nanojson.*;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.fixThumbnailUrl;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getUrlFromNavigationEndpoint;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getValidJsonResponseBody;
+import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.MUSIC_ALBUMS;
+import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.MUSIC_ARTISTS;
+import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.MUSIC_PLAYLISTS;
+import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.MUSIC_SONGS;
+import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.MUSIC_VIDEOS;
+import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+
+import com.grack.nanojson.JsonArray;
+import com.grack.nanojson.JsonObject;
+import com.grack.nanojson.JsonParser;
+import com.grack.nanojson.JsonParserException;
+import com.grack.nanojson.JsonWriter;
+
 import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.MetaInfo;
 import org.schabi.newpipe.extractor.Page;
@@ -19,17 +37,14 @@ import org.schabi.newpipe.extractor.utils.JsonUtils;
 import org.schabi.newpipe.extractor.utils.Parser;
 import org.schabi.newpipe.extractor.utils.Utils;
 
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.*;
-import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.*;
-import static org.schabi.newpipe.extractor.utils.Utils.*;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
 public class YoutubeMusicSearchExtractor extends SearchExtractor {
     private JsonObject initialData;
@@ -162,7 +177,7 @@ public class YoutubeMusicSearchExtractor extends SearchExtractor {
             return false;
         }
 
-        JsonObject firstContent = itemSectionRenderer.getArray("contents").getObject(0);
+        final JsonObject firstContent = itemSectionRenderer.getArray("contents").getObject(0);
 
         return firstContent.has("didYouMeanRenderer")
                 || firstContent.has("showingResultsForRenderer");
@@ -211,7 +226,7 @@ public class YoutubeMusicSearchExtractor extends SearchExtractor {
         final String[] youtubeMusicKeys = YoutubeParsingHelper.getYoutubeMusicKey();
 
         // @formatter:off
-        byte[] json = JsonWriter.string()
+        final byte[] json = JsonWriter.string()
             .object()
                 .object("context")
                     .object("client")
@@ -331,7 +346,8 @@ public class YoutubeMusicSearchExtractor extends SearchExtractor {
                         @Override
                         public String getUploaderUrl() throws ParsingException {
                             if (searchType.equals(MUSIC_VIDEOS)) {
-                                JsonArray items = info.getObject("menu").getObject("menuRenderer")
+                                final JsonArray items = info.getObject("menu")
+                                        .getObject("menuRenderer")
                                         .getArray("items");
                                 for (final Object item : items) {
                                     final JsonObject menuNavigationItemRenderer =
@@ -354,8 +370,9 @@ public class YoutubeMusicSearchExtractor extends SearchExtractor {
                                         .getObject("musicResponsiveListItemFlexColumnRenderer")
                                         .getObject("text").getArray("runs").getObject(0);
 
-                                if (!navigationEndpointHolder.has("navigationEndpoint"))
+                                if (!navigationEndpointHolder.has("navigationEndpoint")) {
                                     return null;
+                                }
 
                                 final String url = getUrlFromNavigationEndpoint(
                                         navigationEndpointHolder.getObject("navigationEndpoint"));
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubePlaylistExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubePlaylistExtractor.java
index c3ffd17d..1d1ecc85 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubePlaylistExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubePlaylistExtractor.java
@@ -1,5 +1,17 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.YOUTUBEI_V1_URL;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.addClientInfoHeaders;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.fixThumbnailUrl;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getJsonPostResponse;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getKey;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getUrlFromNavigationEndpoint;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getValidJsonResponseBody;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopJsonBuilder;
+import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
 import com.grack.nanojson.JsonWriter;
@@ -30,9 +42,6 @@ import java.util.Map;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
-import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.*;
-import static org.schabi.newpipe.extractor.utils.Utils.*;
-
 public class YoutubePlaylistExtractor extends PlaylistExtractor {
     // Minimum size of the stats array in the browse response which includes the streams count
     private static final int STATS_ARRAY_WITH_STREAMS_COUNT_MIN_SIZE = 2;
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubePlaylistInfoItemExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubePlaylistInfoItemExtractor.java
index 5ce47507..14895aac 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubePlaylistInfoItemExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubePlaylistInfoItemExtractor.java
@@ -11,20 +11,20 @@ import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
 
 public class YoutubePlaylistInfoItemExtractor implements PlaylistInfoItemExtractor {
-    private JsonObject playlistInfoItem;
+    private final JsonObject playlistInfoItem;
 
-    public YoutubePlaylistInfoItemExtractor(JsonObject playlistInfoItem) {
+    public YoutubePlaylistInfoItemExtractor(final JsonObject playlistInfoItem) {
         this.playlistInfoItem = playlistInfoItem;
     }
 
     @Override
     public String getThumbnailUrl() throws ParsingException {
         try {
-            String url = playlistInfoItem.getArray("thumbnails").getObject(0)
+            final String url = playlistInfoItem.getArray("thumbnails").getObject(0)
                     .getArray("thumbnails").getObject(0).getString("url");
 
             return fixThumbnailUrl(url);
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get thumbnail url", e);
         }
     }
@@ -33,7 +33,7 @@ public class YoutubePlaylistInfoItemExtractor implements PlaylistInfoItemExtract
     public String getName() throws ParsingException {
         try {
             return getTextFromObject(playlistInfoItem.getObject("title"));
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get name", e);
         }
     }
@@ -41,9 +41,9 @@ public class YoutubePlaylistInfoItemExtractor implements PlaylistInfoItemExtract
     @Override
     public String getUrl() throws ParsingException {
         try {
-            String id = playlistInfoItem.getString("playlistId");
+            final String id = playlistInfoItem.getString("playlistId");
             return YoutubePlaylistLinkHandlerFactory.getInstance().getUrl(id);
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get url", e);
         }
     }
@@ -52,7 +52,7 @@ public class YoutubePlaylistInfoItemExtractor implements PlaylistInfoItemExtract
     public String getUploaderName() throws ParsingException {
         try {
             return getTextFromObject(playlistInfoItem.getObject("longBylineText"));
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get uploader name", e);
         }
     }
@@ -60,8 +60,9 @@ public class YoutubePlaylistInfoItemExtractor implements PlaylistInfoItemExtract
     @Override
     public long getStreamCount() throws ParsingException {
         try {
-            return Long.parseLong(Utils.removeNonDigitCharacters(playlistInfoItem.getString("videoCount")));
-        } catch (Exception e) {
+            return Long.parseLong(Utils.removeNonDigitCharacters(
+                    playlistInfoItem.getString("videoCount")));
+        } catch (final Exception e) {
             throw new ParsingException("Could not get stream count", e);
         }
     }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSearchExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSearchExtractor.java
index 457ccbbf..895a8594 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSearchExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSearchExtractor.java
@@ -1,6 +1,22 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
-import com.grack.nanojson.*;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.YOUTUBEI_V1_URL;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getJsonPostResponse;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getKey;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getValidJsonResponseBody;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopJsonBuilder;
+import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.getSearchParameter;
+import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+
+import com.grack.nanojson.JsonArray;
+import com.grack.nanojson.JsonBuilder;
+import com.grack.nanojson.JsonObject;
+import com.grack.nanojson.JsonParser;
+import com.grack.nanojson.JsonParserException;
+import com.grack.nanojson.JsonWriter;
+
 import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.MetaInfo;
 import org.schabi.newpipe.extractor.Page;
@@ -16,15 +32,11 @@ import org.schabi.newpipe.extractor.search.SearchExtractor;
 import org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper;
 import org.schabi.newpipe.extractor.utils.JsonUtils;
 
-import javax.annotation.Nonnull;
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.List;
 
-import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.getSearchParameter;
-import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.*;
-import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
-import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+import javax.annotation.Nonnull;
 
 /*
  * Created by Christian Schabesberger on 22.07.2018
@@ -179,7 +191,7 @@ public class YoutubeSearchExtractor extends SearchExtractor {
         final JsonObject ajaxJson;
         try {
             ajaxJson = JsonParser.object().from(responseBody);
-        } catch (JsonParserException e) {
+        } catch (final JsonParserException e) {
             throw new ParsingException("Could not parse JSON", e);
         }
 
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java
index 2730421f..7aef5081 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java
@@ -1,5 +1,18 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.createPlayerBodyWithSts;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.fixThumbnailUrl;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getJsonMobilePostResponse;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getJsonPostResponse;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareAndroidMobileEmbedVideoJsonBuilder;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareAndroidMobileJsonBuilder;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopEmbedVideoJsonBuilder;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopJsonBuilder;
+import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
 import com.grack.nanojson.JsonWriter;
@@ -7,7 +20,6 @@ import com.grack.nanojson.JsonWriter;
 import org.mozilla.javascript.Context;
 import org.mozilla.javascript.Function;
 import org.mozilla.javascript.ScriptableObject;
-
 import org.schabi.newpipe.extractor.MediaFormat;
 import org.schabi.newpipe.extractor.MetaInfo;
 import org.schabi.newpipe.extractor.MultiInfoItemsCollector;
@@ -32,24 +44,35 @@ import org.schabi.newpipe.extractor.services.youtube.YoutubeJavaScriptExtractor;
 import org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper;
 import org.schabi.newpipe.extractor.services.youtube.YoutubeThrottlingDecrypter;
 import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeChannelLinkHandlerFactory;
-import org.schabi.newpipe.extractor.stream.*;
+import org.schabi.newpipe.extractor.stream.AudioStream;
+import org.schabi.newpipe.extractor.stream.Description;
+import org.schabi.newpipe.extractor.stream.Frameset;
+import org.schabi.newpipe.extractor.stream.Stream;
+import org.schabi.newpipe.extractor.stream.StreamExtractor;
+import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
+import org.schabi.newpipe.extractor.stream.StreamSegment;
+import org.schabi.newpipe.extractor.stream.StreamType;
+import org.schabi.newpipe.extractor.stream.SubtitlesStream;
+import org.schabi.newpipe.extractor.stream.VideoStream;
 import org.schabi.newpipe.extractor.utils.JsonUtils;
 import org.schabi.newpipe.extractor.utils.Parser;
 import org.schabi.newpipe.extractor.utils.Utils;
 
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.time.LocalDate;
 import java.time.OffsetDateTime;
 import java.time.format.DateTimeFormatter;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
 
-import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.*;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
-import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
 /*
  * Created by Christian Schabesberger on 06.08.15.
@@ -127,7 +150,9 @@ public class YoutubeStreamExtractor extends StreamExtractor {
         if (isNullOrEmpty(title)) {
             title = playerResponse.getObject("videoDetails").getString("title");
 
-            if (isNullOrEmpty(title)) throw new ParsingException("Could not get name");
+            if (isNullOrEmpty(title)) {
+                throw new ParsingException("Could not get name");
+            }
         }
 
         return title;
@@ -158,8 +183,8 @@ public class YoutubeStreamExtractor extends StreamExtractor {
 
         if (getTextFromObject(getVideoPrimaryInfoRenderer().getObject("dateText"))
                 .startsWith("Premiered")) {
-            String time = getTextFromObject(getVideoPrimaryInfoRenderer().getObject("dateText"))
-                    .substring(10);
+            final String time = getTextFromObject(
+                    getVideoPrimaryInfoRenderer().getObject("dateText")).substring(10);
 
             try { // Premiered 20 hours ago
                 final TimeAgoParser timeAgoParser = TimeAgoPatternsManager.getTimeAgoParserFor(
@@ -206,10 +231,10 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     public String getThumbnailUrl() throws ParsingException {
         assertPageFetched();
         try {
-            JsonArray thumbnails = playerResponse.getObject("videoDetails").getObject("thumbnail")
-                    .getArray("thumbnails");
+            final JsonArray thumbnails = playerResponse.getObject("videoDetails")
+                    .getObject("thumbnail").getArray("thumbnails");
             // the last thumbnail is the one with the highest resolution
-            String url = thumbnails.getObject(thumbnails.size() - 1).getString("url");
+            final String url = thumbnails.getObject(thumbnails.size() - 1).getString("url");
 
             return fixThumbnailUrl(url);
         } catch (final Exception e) {
@@ -224,9 +249,11 @@ public class YoutubeStreamExtractor extends StreamExtractor {
         assertPageFetched();
         // Description with more info on links
         try {
-            String description = getTextFromObject(getVideoSecondaryInfoRenderer()
+            final String description = getTextFromObject(getVideoSecondaryInfoRenderer()
                     .getObject("description"), true);
-            if (!isNullOrEmpty(description)) return new Description(description, Description.HTML);
+            if (!isNullOrEmpty(description)) {
+                return new Description(description, Description.HTML);
+            }
         } catch (final ParsingException ignored) {
             // Age-restricted videos cause a ParsingException here
         }
@@ -327,10 +354,14 @@ public class YoutubeStreamExtractor extends StreamExtractor {
         if (isNullOrEmpty(views)) {
             views = playerResponse.getObject("videoDetails").getString("viewCount");
 
-            if (isNullOrEmpty(views)) throw new ParsingException("Could not get view count");
+            if (isNullOrEmpty(views)) {
+                throw new ParsingException("Could not get view count");
+            }
         }
 
-        if (views.toLowerCase().contains("no views")) return 0;
+        if (views.toLowerCase().contains("no views")) {
+            return 0;
+        }
 
         return Long.parseLong(Utils.removeNonDigitCharacters(views));
     }
@@ -354,7 +385,8 @@ public class YoutubeStreamExtractor extends StreamExtractor {
             if (likesString == null) {
                 // If this kicks in our button has no content and therefore ratings must be disabled
                 if (playerResponse.getObject("videoDetails").getBoolean("allowRatings")) {
-                    throw new ParsingException("Ratings are enabled even though the like button is missing");
+                    throw new ParsingException(
+                            "Ratings are enabled even though the like button is missing");
                 }
                 return -1;
             }
@@ -400,7 +432,9 @@ public class YoutubeStreamExtractor extends StreamExtractor {
         // The difference between the real name of the channel and the displayed name is especially
         // visible for music channels and autogenerated channels.
         final String uploaderName = playerResponse.getObject("videoDetails").getString("author");
-        if (isNullOrEmpty(uploaderName)) throw new ParsingException("Could not get uploader name");
+        if (isNullOrEmpty(uploaderName)) {
+            throw new ParsingException("Could not get uploader name");
+        }
 
         return uploaderName;
     }
@@ -440,12 +474,14 @@ public class YoutubeStreamExtractor extends StreamExtractor {
 
     @Override
     public long getUploaderSubscriberCount() throws ParsingException {
-        final JsonObject videoOwnerRenderer = JsonUtils.getObject(videoSecondaryInfoRenderer, "owner.videoOwnerRenderer");
+        final JsonObject videoOwnerRenderer = JsonUtils.getObject(videoSecondaryInfoRenderer,
+                "owner.videoOwnerRenderer");
         if (!videoOwnerRenderer.has("subscriberCountText")) {
             return UNKNOWN_SUBSCRIBER_COUNT;
         }
         try {
-            return Utils.mixedNumberWordToLong(getTextFromObject(videoOwnerRenderer.getObject("subscriberCountText")));
+            return Utils.mixedNumberWordToLong(getTextFromObject(videoOwnerRenderer
+                    .getObject("subscriberCountText")));
         } catch (final NumberFormatException e) {
             throw new ParsingException("Could not get uploader subscriber count", e);
         }
@@ -677,7 +713,8 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     private static final String DEOBFUSCATION_FUNC_NAME = "deobfuscate";
 
     private static final String[] REGEXES = {
-            "(?:\\b|[^a-zA-Z0-9$])([a-zA-Z0-9$]{2,})\\s*=\\s*function\\(\\s*a\\s*\\)\\s*\\{\\s*a\\s*=\\s*a\\.split\\(\\s*\"\"\\s*\\)",
+            "(?:\\b|[^a-zA-Z0-9$])([a-zA-Z0-9$]{2,})\\s*=\\s*function\\(\\s*a\\s*\\)"
+                    + "\\s*\\{\\s*a\\s*=\\s*a\\.split\\(\\s*\"\"\\s*\\)",
             "\\bm=([a-zA-Z0-9$]{2,})\\(decodeURIComponent\\(h\\.s\\)\\)",
             "\\bc&&\\(c=([a-zA-Z0-9$]{2,})\\(decodeURIComponent\\(c\\)\\)",
             "([\\w$]+)\\s*=\\s*function\\((\\w+)\\)\\{\\s*\\2=\\s*\\2\\.split\\(\"\"\\)\\s*;",
@@ -720,7 +757,7 @@ public class YoutubeStreamExtractor extends StreamExtractor {
 
         final JsonObject playabilityStatus = playerResponse.getObject("playabilityStatus");
 
-        boolean ageRestricted = playabilityStatus.getString("reason", EMPTY_STRING)
+        final boolean ageRestricted = playabilityStatus.getString("reason", EMPTY_STRING)
                 .contains("age");
 
         if (!playerResponse.has("streamingData")) {
@@ -765,19 +802,20 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     }
 
     private void checkPlayabilityStatus(final JsonObject youtubePlayerResponse,
-                                        @Nonnull JsonObject playabilityStatus)
+                                        @Nonnull final JsonObject playabilityStatus)
             throws ParsingException {
         String status = playabilityStatus.getString("status");
         // If status exist, and is not "OK", throw the specific exception based on error message
         // or a ContentNotAvailableException with the reason text if it's an unknown reason.
         if (status != null && !status.equalsIgnoreCase("ok")) {
-            playabilityStatus = youtubePlayerResponse.getObject("playabilityStatus");
-            status = playabilityStatus.getString("status");
-            final String reason = playabilityStatus.getString("reason");
+            final JsonObject newPlayabilityStatus
+                    = youtubePlayerResponse.getObject("playabilityStatus");
+            status = newPlayabilityStatus.getString("status");
+            final String reason = newPlayabilityStatus.getString("reason");
 
             if (status.equalsIgnoreCase("login_required")) {
                 if (reason == null) {
-                    final String message = playabilityStatus.getArray("messages").getString(0);
+                    final String message = newPlayabilityStatus.getArray("messages").getString(0);
                     if (message != null && message.contains("private")) {
                         throw new PrivateContentException("This video is private.");
                     }
@@ -797,11 +835,11 @@ public class YoutubeStreamExtractor extends StreamExtractor {
                         throw new PaidContentException("This video is a paid video");
                     }
                     if (reason.contains("members-only")) {
-                        throw new PaidContentException(
-                                "This video is only available for members of the channel of this video");
+                        throw new PaidContentException("This video is only available"
+                                + " for members of the channel of this video");
                     }
                     if (reason.contains("unavailable")) {
-                        final String detailedErrorMessage = getTextFromObject(playabilityStatus
+                        final String detailedErrorMessage = getTextFromObject(newPlayabilityStatus
                                 .getObject("errorScreen").getObject("playerErrorMessageRenderer")
                                 .getObject("subreason"));
                         if (detailedErrorMessage != null) {
@@ -900,8 +938,8 @@ public class YoutubeStreamExtractor extends StreamExtractor {
                                              final String videoId)
             throws IOException, ExtractionException {
         final byte[] androidMobileEmbedBody = JsonWriter.string(
-                        prepareAndroidMobileEmbedVideoJsonBuilder(localization, contentCountry, videoId)
-                                .done())
+                prepareAndroidMobileEmbedVideoJsonBuilder(localization, contentCountry, videoId)
+                        .done())
                 .getBytes(UTF_8);
         final JsonObject androidMobileEmbedPlayerResponse = getJsonMobilePostResponse("player",
                 androidMobileEmbedBody, contentCountry, localization);
@@ -953,11 +991,12 @@ public class YoutubeStreamExtractor extends StreamExtractor {
         return false;
     }
 
-    private String getDeobfuscationFuncName(final String playerCode) throws DeobfuscateException {
+    private String getDeobfuscationFuncName(final String thePlayerCode)
+            throws DeobfuscateException {
         Parser.RegexException exception = null;
         for (final String regex : REGEXES) {
             try {
-                return Parser.matchGroup1(regex, playerCode);
+                return Parser.matchGroup1(regex, thePlayerCode);
             } catch (final Parser.RegexException re) {
                 if (exception == null) {
                     exception = re;
@@ -1011,7 +1050,9 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     }
 
     private void getStsFromPlayerJs() throws ParsingException {
-        if (!isNullOrEmpty(sts)) return;
+        if (!isNullOrEmpty(sts)) {
+            return;
+        }
         if (playerCode == null) {
             storePlayerJs();
             if (playerCode == null) {
@@ -1045,51 +1086,55 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     //////////////////////////////////////////////////////////////////////////*/
 
     private JsonObject getVideoPrimaryInfoRenderer() throws ParsingException {
-        if (this.videoPrimaryInfoRenderer != null) return this.videoPrimaryInfoRenderer;
+        if (this.videoPrimaryInfoRenderer != null) {
+            return this.videoPrimaryInfoRenderer;
+        }
 
         final JsonArray contents = nextResponse.getObject("contents")
                 .getObject("twoColumnWatchNextResults").getObject("results").getObject("results")
                 .getArray("contents");
-        JsonObject videoPrimaryInfoRenderer = null;
+        JsonObject theVideoPrimaryInfoRenderer = null;
 
         for (final Object content : contents) {
             if (((JsonObject) content).has("videoPrimaryInfoRenderer")) {
-                videoPrimaryInfoRenderer = ((JsonObject) content)
+                theVideoPrimaryInfoRenderer = ((JsonObject) content)
                         .getObject("videoPrimaryInfoRenderer");
                 break;
             }
         }
 
-        if (isNullOrEmpty(videoPrimaryInfoRenderer)) {
+        if (isNullOrEmpty(theVideoPrimaryInfoRenderer)) {
             throw new ParsingException("Could not find videoPrimaryInfoRenderer");
         }
 
-        this.videoPrimaryInfoRenderer = videoPrimaryInfoRenderer;
-        return videoPrimaryInfoRenderer;
+        this.videoPrimaryInfoRenderer = theVideoPrimaryInfoRenderer;
+        return theVideoPrimaryInfoRenderer;
     }
 
     private JsonObject getVideoSecondaryInfoRenderer() throws ParsingException {
-        if (this.videoSecondaryInfoRenderer != null) return this.videoSecondaryInfoRenderer;
+        if (this.videoSecondaryInfoRenderer != null) {
+            return this.videoSecondaryInfoRenderer;
+        }
 
         final JsonArray contents = nextResponse.getObject("contents")
                 .getObject("twoColumnWatchNextResults").getObject("results").getObject("results")
                 .getArray("contents");
-        JsonObject videoSecondaryInfoRenderer = null;
+        JsonObject theVideoSecondaryInfoRenderer = null;
 
         for (final Object content : contents) {
             if (((JsonObject) content).has("videoSecondaryInfoRenderer")) {
-                videoSecondaryInfoRenderer = ((JsonObject) content)
+                theVideoSecondaryInfoRenderer = ((JsonObject) content)
                         .getObject("videoSecondaryInfoRenderer");
                 break;
             }
         }
 
-        if (isNullOrEmpty(videoSecondaryInfoRenderer)) {
+        if (isNullOrEmpty(theVideoSecondaryInfoRenderer)) {
             throw new ParsingException("Could not find videoSecondaryInfoRenderer");
         }
 
-        this.videoSecondaryInfoRenderer = videoSecondaryInfoRenderer;
-        return videoSecondaryInfoRenderer;
+        this.videoSecondaryInfoRenderer = theVideoSecondaryInfoRenderer;
+        return theVideoSecondaryInfoRenderer;
     }
 
     @Nonnull
@@ -1120,8 +1165,8 @@ public class YoutubeStreamExtractor extends StreamExtractor {
         if (streamingData != null && streamingData.has(streamingDataKey)) {
             final JsonArray formats = streamingData.getArray(streamingDataKey);
             for (int i = 0; i != formats.size(); ++i) {
-                JsonObject formatData = formats.getObject(i);
-                int itag = formatData.getInt("itag");
+                final JsonObject formatData = formats.getObject(i);
+                final int itag = formatData.getInt("itag");
 
                 if (ItagItem.isSupported(itag)) {
                     try {
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamInfoItemExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamInfoItemExtractor.java
index 199c2452..9a47365d 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamInfoItemExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamInfoItemExtractor.java
@@ -1,7 +1,14 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.fixThumbnailUrl;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getUrlFromNavigationEndpoint;
+import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
+
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.localization.DateWrapper;
 import org.schabi.newpipe.extractor.localization.TimeAgoParser;
@@ -12,15 +19,12 @@ import org.schabi.newpipe.extractor.stream.StreamType;
 import org.schabi.newpipe.extractor.utils.JsonUtils;
 import org.schabi.newpipe.extractor.utils.Utils;
 
-import javax.annotation.Nullable;
 import java.time.Instant;
 import java.time.OffsetDateTime;
 import java.time.ZoneOffset;
 import java.time.format.DateTimeFormatter;
 
-import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.*;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+import javax.annotation.Nullable;
 
 /*
  * Copyright (C) Christian Schabesberger 2016 
@@ -51,7 +55,8 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
      * @param videoInfoItem The JSON page element
      * @param timeAgoParser A parser of the textual dates or {@code null}.
      */
-    public YoutubeStreamInfoItemExtractor(JsonObject videoInfoItem, @Nullable TimeAgoParser timeAgoParser) {
+    public YoutubeStreamInfoItemExtractor(final JsonObject videoInfoItem,
+                                          @Nullable final TimeAgoParser timeAgoParser) {
         this.videoInfo = videoInfoItem;
         this.timeAgoParser = timeAgoParser;
     }
@@ -64,43 +69,51 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
 
         final JsonArray badges = videoInfo.getArray("badges");
         for (final Object badge : badges) {
-            final JsonObject badgeRenderer = ((JsonObject) badge).getObject("metadataBadgeRenderer");
-            if (badgeRenderer.getString("style", EMPTY_STRING).equals("BADGE_STYLE_TYPE_LIVE_NOW") ||
-                    badgeRenderer.getString("label", EMPTY_STRING).equals("LIVE NOW")) {
-                return cachedStreamType = StreamType.LIVE_STREAM;
+            final JsonObject badgeRenderer
+                    = ((JsonObject) badge).getObject("metadataBadgeRenderer");
+            if (badgeRenderer.getString("style", EMPTY_STRING).equals("BADGE_STYLE_TYPE_LIVE_NOW")
+                    || badgeRenderer.getString("label", EMPTY_STRING).equals("LIVE NOW")) {
+                cachedStreamType = StreamType.LIVE_STREAM;
+                return cachedStreamType;
             }
         }
 
         for (final Object overlay : videoInfo.getArray("thumbnailOverlays")) {
             final String style = ((JsonObject) overlay)
-                    .getObject("thumbnailOverlayTimeStatusRenderer").getString("style", EMPTY_STRING);
+                    .getObject("thumbnailOverlayTimeStatusRenderer")
+                    .getString("style", EMPTY_STRING);
             if (style.equalsIgnoreCase("LIVE")) {
-                return cachedStreamType = StreamType.LIVE_STREAM;
+                cachedStreamType = StreamType.LIVE_STREAM;
+                return cachedStreamType;
             }
         }
 
-        return cachedStreamType = StreamType.VIDEO_STREAM;
+        cachedStreamType = StreamType.VIDEO_STREAM;
+        return cachedStreamType;
     }
 
     @Override
     public boolean isAd() throws ParsingException {
-        return isPremium() || getName().equals("[Private video]") || getName().equals("[Deleted video]");
+        return isPremium() || getName().equals("[Private video]")
+                || getName().equals("[Deleted video]");
     }
 
     @Override
     public String getUrl() throws ParsingException {
         try {
-            String videoId = videoInfo.getString("videoId");
+            final String videoId = videoInfo.getString("videoId");
             return YoutubeStreamLinkHandlerFactory.getInstance().getUrl(videoId);
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get url", e);
         }
     }
 
     @Override
     public String getName() throws ParsingException {
-        String name = getTextFromObject(videoInfo.getObject("title"));
-        if (!isNullOrEmpty(name)) return name;
+        final String name = getTextFromObject(videoInfo.getObject("title"));
+        if (!isNullOrEmpty(name)) {
+            return name;
+        }
         throw new ParsingException("Could not get name");
     }
 
@@ -113,14 +126,16 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
         String duration = getTextFromObject(videoInfo.getObject("lengthText"));
 
         if (isNullOrEmpty(duration)) {
-            for (Object thumbnailOverlay : videoInfo.getArray("thumbnailOverlays")) {
+            for (final Object thumbnailOverlay : videoInfo.getArray("thumbnailOverlays")) {
                 if (((JsonObject) thumbnailOverlay).has("thumbnailOverlayTimeStatusRenderer")) {
                     duration = getTextFromObject(((JsonObject) thumbnailOverlay)
                             .getObject("thumbnailOverlayTimeStatusRenderer").getObject("text"));
                 }
             }
 
-            if (isNullOrEmpty(duration)) throw new ParsingException("Could not get duration");
+            if (isNullOrEmpty(duration)) {
+                throw new ParsingException("Could not get duration");
+            }
         }
 
         return YoutubeParsingHelper.parseDurationString(duration);
@@ -136,7 +151,9 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
             if (isNullOrEmpty(name)) {
                 name = getTextFromObject(videoInfo.getObject("shortBylineText"));
 
-                if (isNullOrEmpty(name)) throw new ParsingException("Could not get uploader name");
+                if (isNullOrEmpty(name)) {
+                    throw new ParsingException("Could not get uploader name");
+                }
             }
         }
 
@@ -156,7 +173,9 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
                 url = getUrlFromNavigationEndpoint(videoInfo.getObject("shortBylineText")
                         .getArray("runs").getObject(0).getObject("navigationEndpoint"));
 
-                if (isNullOrEmpty(url)) throw new ParsingException("Could not get uploader url");
+                if (isNullOrEmpty(url)) {
+                    throw new ParsingException("Could not get uploader url");
+                }
             }
         }
 
@@ -168,7 +187,8 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
     public String getUploaderAvatarUrl() throws ParsingException {
 
         if (videoInfo.has("channelThumbnailSupportedRenderers")) {
-            return JsonUtils.getArray(videoInfo, "channelThumbnailSupportedRenderers.channelThumbnailWithLinkRenderer.thumbnail.thumbnails")
+            return JsonUtils.getArray(videoInfo, "channelThumbnailSupportedRenderers"
+                    + ".channelThumbnailWithLinkRenderer.thumbnail.thumbnails")
                     .getObject(0).getString("url");
         }
 
@@ -196,8 +216,11 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
             return DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm").format(getDateFromPremiere());
         }
 
-        final String publishedTimeText = getTextFromObject(videoInfo.getObject("publishedTimeText"));
-        if (publishedTimeText != null && !publishedTimeText.isEmpty()) return publishedTimeText;
+        final String publishedTimeText
+                = getTextFromObject(videoInfo.getObject("publishedTimeText"));
+        if (publishedTimeText != null && !publishedTimeText.isEmpty()) {
+            return publishedTimeText;
+        }
 
         return null;
     }
@@ -217,7 +240,7 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
         if (timeAgoParser != null && !isNullOrEmpty(textualUploadDate)) {
             try {
                 return timeAgoParser.parse(textualUploadDate);
-            } catch (ParsingException e) {
+            } catch (final ParsingException e) {
                 throw new ParsingException("Could not get upload date", e);
             }
         }
@@ -245,7 +268,7 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
             }
 
             return Long.parseLong(Utils.removeNonDigitCharacters(viewCount));
-        } catch (Exception e) {
+        } catch (final Exception e) {
             throw new ParsingException("Could not get view count", e);
         }
     }
@@ -256,9 +279,10 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
     }
 
     private boolean isPremium() {
-        JsonArray badges = videoInfo.getArray("badges");
-        for (Object badge : badges) {
-            if (((JsonObject) badge).getObject("metadataBadgeRenderer").getString("label", EMPTY_STRING).equals("Premium")) {
+        final JsonArray badges = videoInfo.getArray("badges");
+        for (final Object badge : badges) {
+            if (((JsonObject) badge).getObject("metadataBadgeRenderer")
+                    .getString("label", EMPTY_STRING).equals("Premium")) {
                 return true;
             }
         }
@@ -276,8 +300,8 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
         try {
             return OffsetDateTime.ofInstant(Instant.ofEpochSecond(Long.parseLong(startTime)),
                     ZoneOffset.UTC);
-        } catch (Exception e) {
-            throw new ParsingException("Could not parse date from premiere:  \"" + startTime + "\"");
+        } catch (final Exception e) {
+            throw new ParsingException("Could not parse date from premiere: \"" + startTime + "\"");
         }
     }
 
@@ -286,7 +310,8 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
     public String getShortDescription() throws ParsingException {
 
         if (videoInfo.has("detailedMetadataSnippets")) {
-            return getTextFromObject(videoInfo.getArray("detailedMetadataSnippets").getObject(0).getObject("snippetText"));
+            return getTextFromObject(videoInfo.getArray("detailedMetadataSnippets")
+                    .getObject(0).getObject("snippetText"));
         }
 
         if (videoInfo.has("descriptionSnippet")) {
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSubscriptionExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSubscriptionExtractor.java
index 6bd553a8..403151f0 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSubscriptionExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSubscriptionExtractor.java
@@ -70,7 +70,7 @@ public class YoutubeSubscriptionExtractor extends SubscriptionExtractor {
         final JsonArray subscriptions;
         try {
             subscriptions = JsonParser.array().from(contentInputStream);
-        } catch (JsonParserException e) {
+        } catch (final JsonParserException e) {
             throw new InvalidSourceException("Invalid json input stream", e);
         }
 
@@ -101,7 +101,7 @@ public class YoutubeSubscriptionExtractor extends SubscriptionExtractor {
 
     public List fromZipInputStream(@Nonnull final InputStream contentInputStream)
             throws ExtractionException {
-        try (final ZipInputStream zipInputStream = new ZipInputStream(contentInputStream)) {
+        try (ZipInputStream zipInputStream = new ZipInputStream(contentInputStream)) {
             ZipEntry zipEntry;
             while ((zipEntry = zipInputStream.getNextEntry()) != null) {
                 if (zipEntry.getName().toLowerCase().endsWith(".csv")) {
@@ -122,15 +122,16 @@ public class YoutubeSubscriptionExtractor extends SubscriptionExtractor {
             throw new InvalidSourceException("Error reading contents of zip file", e);
         }
 
-        throw new InvalidSourceException("Unable to find a valid subscriptions.csv file (try extracting and selecting the csv file)");
+        throw new InvalidSourceException("Unable to find a valid subscriptions.csv file"
+                + " (try extracting and selecting the csv file)");
     }
 
     public List fromCsvInputStream(@Nonnull final InputStream contentInputStream)
             throws ExtractionException {
         // Expected format of CSV file:
-        //      Channel Id,Channel Url,Channel Title
-        //      UC1JTQBa5QxZCpXrFSkMxmPw,http://www.youtube.com/channel/UC1JTQBa5QxZCpXrFSkMxmPw,Raycevick
-        //      UCFl7yKfcRcFmIUbKeCA-SJQ,http://www.youtube.com/channel/UCFl7yKfcRcFmIUbKeCA-SJQ,Joji
+        // Channel Id,Channel Url,Channel Title
+        //UC1JTQBa5QxZCpXrFSkMxmPw,http://www.youtube.com/channel/UC1JTQBa5QxZCpXrFSkMxmPw,Raycevick
+        //UCFl7yKfcRcFmIUbKeCA-SJQ,http://www.youtube.com/channel/UCFl7yKfcRcFmIUbKeCA-SJQ,Joji
         //
         // Notes:
         //      It's always 3 columns
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSuggestionExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSuggestionExtractor.java
index 277e8531..70789d45 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSuggestionExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeSuggestionExtractor.java
@@ -1,8 +1,12 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.addCookieHeader;
+import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
+
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonParser;
 import com.grack.nanojson.JsonParserException;
+
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.downloader.Downloader;
@@ -12,10 +16,10 @@ import org.schabi.newpipe.extractor.suggestion.SuggestionExtractor;
 
 import java.io.IOException;
 import java.net.URLEncoder;
-import java.util.*;
-
-import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.addCookieHeader;
-import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 /*
  * Created by Christian Schabesberger on 28.09.16.
@@ -39,12 +43,12 @@ import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
 
 public class YoutubeSuggestionExtractor extends SuggestionExtractor {
 
-    public YoutubeSuggestionExtractor(StreamingService service) {
+    public YoutubeSuggestionExtractor(final StreamingService service) {
         super(service);
     }
 
     @Override
-    public List suggestionList(String query) throws IOException, ExtractionException {
+    public List suggestionList(final String query) throws IOException, ExtractionException {
         final Downloader dl = NewPipe.getDownloader();
         final List suggestions = new ArrayList<>();
 
@@ -62,16 +66,20 @@ public class YoutubeSuggestionExtractor extends SuggestionExtractor {
         // trim JSONP part "JP(...)"
         response = response.substring(3, response.length() - 1);
         try {
-            JsonArray collection = JsonParser.array().from(response).getArray(1);
-            for (Object suggestion : collection) {
-                if (!(suggestion instanceof JsonArray)) continue;
-                String suggestionStr = ((JsonArray) suggestion).getString(0);
-                if (suggestionStr == null) continue;
+            final JsonArray collection = JsonParser.array().from(response).getArray(1);
+            for (final Object suggestion : collection) {
+                if (!(suggestion instanceof JsonArray)) {
+                    continue;
+                }
+                final String suggestionStr = ((JsonArray) suggestion).getString(0);
+                if (suggestionStr == null) {
+                    continue;
+                }
                 suggestions.add(suggestionStr);
             }
 
             return suggestions;
-        } catch (JsonParserException e) {
+        } catch (final JsonParserException e) {
             throw new ParsingException("Could not parse json response", e);
         }
     }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeTrendingExtractor.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeTrendingExtractor.java
index b038cd92..a82b8d5d 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeTrendingExtractor.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeTrendingExtractor.java
@@ -55,7 +55,8 @@ public class YoutubeTrendingExtractor extends KioskExtractor {
     }
 
     @Override
-    public void onFetchPage(@Nonnull final Downloader downloader) throws IOException, ExtractionException {
+    public void onFetchPage(@Nonnull final Downloader downloader)
+            throws IOException, ExtractionException {
         // @formatter:off
         final byte[] body = JsonWriter.string(prepareDesktopJsonBuilder(getExtractorLocalization(),
                 getExtractorContentCountry())
@@ -92,15 +93,15 @@ public class YoutubeTrendingExtractor extends KioskExtractor {
     @Nonnull
     @Override
     public InfoItemsPage getInitialPage() {
-        StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
+        final StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
         final TimeAgoParser timeAgoParser = getTimeAgoParser();
-        JsonArray itemSectionRenderers = initialData.getObject("contents")
+        final JsonArray itemSectionRenderers = initialData.getObject("contents")
                 .getObject("twoColumnBrowseResultsRenderer").getArray("tabs").getObject(0)
                 .getObject("tabRenderer").getObject("content").getObject("sectionListRenderer")
                 .getArray("contents");
 
         for (final Object itemSectionRenderer : itemSectionRenderers) {
-            JsonObject expandedShelfContentsRenderer = ((JsonObject) itemSectionRenderer)
+            final JsonObject expandedShelfContentsRenderer = ((JsonObject) itemSectionRenderer)
                     .getObject("itemSectionRenderer").getArray("contents").getObject(0)
                     .getObject("shelfRenderer").getObject("content")
                     .getObject("expandedShelfContentsRenderer");
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeChannelLinkHandlerFactory.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeChannelLinkHandlerFactory.java
index 2dc8fc42..eed04bf4 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeChannelLinkHandlerFactory.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeChannelLinkHandlerFactory.java
@@ -29,30 +29,34 @@ import java.util.List;
  * along with NewPipe.  If not, see .
  */
 
-public class YoutubeChannelLinkHandlerFactory extends ListLinkHandlerFactory {
+public final class YoutubeChannelLinkHandlerFactory extends ListLinkHandlerFactory {
 
-    private static final YoutubeChannelLinkHandlerFactory instance = new YoutubeChannelLinkHandlerFactory();
+    private static final YoutubeChannelLinkHandlerFactory INSTANCE
+            = new YoutubeChannelLinkHandlerFactory();
 
-    private static final Pattern excludedSegments =
-      Pattern.compile("playlist|watch|attribution_link|watch_popup|embed|feed|select_site");
+    private static final Pattern EXCLUDED_SEGMENTS =
+            Pattern.compile("playlist|watch|attribution_link|watch_popup|embed|feed|select_site");
+
+    private YoutubeChannelLinkHandlerFactory() {
+    }
 
     public static YoutubeChannelLinkHandlerFactory getInstance() {
-        return instance;
+        return INSTANCE;
     }
 
     /**
      * Returns URL to channel from an ID
      *
      * @param id Channel ID including e.g. 'channel/'
-     * @param contentFilters
-     * @param searchFilter
      * @return URL to channel
      */
     @Override
-    public String getUrl(String id, List contentFilters, String searchFilter) {
+    public String getUrl(final String id,
+                         final List contentFilters,
+                         final String searchFilter) {
         return "https://www.youtube.com/" + id;
     }
-    
+
     /**
      * Returns true if path conform to
      * custom short channel URLs like youtube.com/yourcustomname
@@ -61,17 +65,18 @@ public class YoutubeChannelLinkHandlerFactory extends ListLinkHandlerFactory {
      * @return true - if value conform to short channel URL, false - not
      */
     private boolean isCustomShortChannelUrl(final String[] splitPath) {
-        return splitPath.length == 1 && !excludedSegments.matcher(splitPath[0]).matches();
+        return splitPath.length == 1 && !EXCLUDED_SEGMENTS.matcher(splitPath[0]).matches();
     }
 
     @Override
-    public String getId(String url) throws ParsingException {
+    public String getId(final String url) throws ParsingException {
         try {
             final URL urlObj = Utils.stringToURL(url);
             String path = urlObj.getPath();
 
-            if (!Utils.isHTTP(urlObj) || !(YoutubeParsingHelper.isYoutubeURL(urlObj) ||
-                    YoutubeParsingHelper.isInvidioURL(urlObj) || YoutubeParsingHelper.isHooktubeURL(urlObj))) {
+            if (!Utils.isHTTP(urlObj) || !(YoutubeParsingHelper.isYoutubeURL(urlObj)
+                    || YoutubeParsingHelper.isInvidioURL(urlObj)
+                    || YoutubeParsingHelper.isHooktubeURL(urlObj))) {
                 throw new ParsingException("the URL given is not a Youtube-URL");
             }
 
@@ -85,7 +90,9 @@ public class YoutubeChannelLinkHandlerFactory extends ListLinkHandlerFactory {
                 splitPath = path.split("/");
             }
 
-            if (!path.startsWith("user/") && !path.startsWith("channel/") && !path.startsWith("c/")) {
+            if (!path.startsWith("user/")
+                    && !path.startsWith("channel/")
+                    && !path.startsWith("c/")) {
                 throw new ParsingException("the URL given is neither a channel nor an user");
             }
 
@@ -97,15 +104,16 @@ public class YoutubeChannelLinkHandlerFactory extends ListLinkHandlerFactory {
 
             return splitPath[0] + "/" + id;
         } catch (final Exception exception) {
-            throw new ParsingException("Error could not parse url :" + exception.getMessage(), exception);
+            throw new ParsingException("Error could not parse url :" + exception.getMessage(),
+                    exception);
         }
     }
 
     @Override
-    public boolean onAcceptUrl(String url) {
+    public boolean onAcceptUrl(final String url) {
         try {
             getId(url);
-        } catch (ParsingException e) {
+        } catch (final ParsingException e) {
             return false;
         }
         return true;
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeCommentsLinkHandlerFactory.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeCommentsLinkHandlerFactory.java
index 0e83c07b..a15801b2 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeCommentsLinkHandlerFactory.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeCommentsLinkHandlerFactory.java
@@ -6,22 +6,27 @@ import org.schabi.newpipe.extractor.linkhandler.ListLinkHandlerFactory;
 
 import java.util.List;
 
-public class YoutubeCommentsLinkHandlerFactory extends ListLinkHandlerFactory {
+public final class YoutubeCommentsLinkHandlerFactory extends ListLinkHandlerFactory {
 
-    private static final YoutubeCommentsLinkHandlerFactory instance = new YoutubeCommentsLinkHandlerFactory();
+    private static final YoutubeCommentsLinkHandlerFactory INSTANCE
+            = new YoutubeCommentsLinkHandlerFactory();
+
+    private YoutubeCommentsLinkHandlerFactory() {
+    }
 
     public static YoutubeCommentsLinkHandlerFactory getInstance() {
-        return instance;
+        return INSTANCE;
     }
 
     @Override
-    public String getUrl(String id) {
+    public String getUrl(final String id) {
         return "https://www.youtube.com/watch?v=" + id;
     }
 
     @Override
-    public String getId(String urlString) throws ParsingException, IllegalArgumentException {
-        return YoutubeStreamLinkHandlerFactory.getInstance().getId(urlString); //we need the same id, avoids duplicate code
+    public String getId(final String urlString) throws ParsingException, IllegalArgumentException {
+        // we need the same id, avoids duplicate code
+        return YoutubeStreamLinkHandlerFactory.getInstance().getId(urlString);
     }
 
     @Override
@@ -29,15 +34,17 @@ public class YoutubeCommentsLinkHandlerFactory extends ListLinkHandlerFactory {
         try {
             getId(url);
             return true;
-        } catch (FoundAdException fe) {
+        } catch (final FoundAdException fe) {
             throw fe;
-        } catch (ParsingException e) {
+        } catch (final ParsingException e) {
             return false;
         }
     }
 
     @Override
-    public String getUrl(String id, List contentFilter, String sortFilter) throws ParsingException {
+    public String getUrl(final String id,
+                         final List contentFilter,
+                         final String sortFilter) throws ParsingException {
         return getUrl(id);
     }
 }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubePlaylistLinkHandlerFactory.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubePlaylistLinkHandlerFactory.java
index 9ed2ae77..dc24839f 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubePlaylistLinkHandlerFactory.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubePlaylistLinkHandlerFactory.java
@@ -11,11 +11,14 @@ import org.schabi.newpipe.extractor.linkhandler.ListLinkHandlerFactory;
 import org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper;
 import org.schabi.newpipe.extractor.utils.Utils;
 
-public class YoutubePlaylistLinkHandlerFactory extends ListLinkHandlerFactory {
+public final class YoutubePlaylistLinkHandlerFactory extends ListLinkHandlerFactory {
 
     private static final YoutubePlaylistLinkHandlerFactory INSTANCE =
             new YoutubePlaylistLinkHandlerFactory();
 
+    private YoutubePlaylistLinkHandlerFactory() {
+    }
+
     public static YoutubePlaylistLinkHandlerFactory getInstance() {
         return INSTANCE;
     }
@@ -54,8 +57,10 @@ public class YoutubePlaylistLinkHandlerFactory extends ListLinkHandlerFactory {
 
             if (YoutubeParsingHelper.isYoutubeChannelMixId(listID)
                     && Utils.getQueryValue(urlObj, "v") == null) {
-                //Video id can't be determined from the channel mix id. See YoutubeParsingHelper#extractVideoIdFromMixId
-                throw new ContentNotSupportedException("Channel Mix without a video id are not supported");
+                // Video id can't be determined from the channel mix id.
+                // See YoutubeParsingHelper#extractVideoIdFromMixId
+                throw new ContentNotSupportedException(
+                        "Channel Mix without a video id are not supported");
             }
 
             return listID;
@@ -69,15 +74,15 @@ public class YoutubePlaylistLinkHandlerFactory extends ListLinkHandlerFactory {
     public boolean onAcceptUrl(final String url) {
         try {
             getId(url);
-        } catch (ParsingException e) {
+        } catch (final ParsingException e) {
             return false;
         }
         return true;
     }
 
     /**
-     * If it is a mix (auto-generated playlist) URL, return a {@link LinkHandler} where the URL is like
-     * {@code https://youtube.com/watch?v=videoId&list=playlistId}
+     * If it is a mix (auto-generated playlist) URL, return a {@link LinkHandler} where the URL is
+     * like {@code https://youtube.com/watch?v=videoId&list=playlistId}
      * 
Otherwise use super

      */
     @Override
@@ -96,7 +101,7 @@ public class YoutubePlaylistLinkHandlerFactory extends ListLinkHandlerFactory {
                         getContentFilter(url),
                         getSortFilter(url));
             }
-        } catch (MalformedURLException exception) {
+        } catch (final MalformedURLException exception) {
             throw new ParsingException("Error could not parse URL: " + exception.getMessage(),
                 exception);
         }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeSearchQueryHandlerFactory.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeSearchQueryHandlerFactory.java
index cd5dc5cd..798a2347 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeSearchQueryHandlerFactory.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeSearchQueryHandlerFactory.java
@@ -11,7 +11,7 @@ import java.util.List;
 import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 
-public class YoutubeSearchQueryHandlerFactory extends SearchQueryHandlerFactory {
+public final class YoutubeSearchQueryHandlerFactory extends SearchQueryHandlerFactory {
 
     public static final String ALL = "all";
     public static final String VIDEOS = "videos";
@@ -84,7 +84,10 @@ public class YoutubeSearchQueryHandlerFactory extends SearchQueryHandlerFactory
 
     @Nonnull
     public static String getSearchParameter(final String contentFilter) {
-        if (isNullOrEmpty(contentFilter)) return "";
+        if (isNullOrEmpty(contentFilter)) {
+            return "";
+        }
+
         switch (contentFilter) {
                 case VIDEOS:
                     return "EgIQAQ%3D%3D";
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeStreamLinkHandlerFactory.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeStreamLinkHandlerFactory.java
index dcdea873..302bdd63 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeStreamLinkHandlerFactory.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeStreamLinkHandlerFactory.java
@@ -1,12 +1,16 @@
 package org.schabi.newpipe.extractor.services.youtube.linkHandler;
 
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.isHooktubeURL;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.isInvidioURL;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.isY2ubeURL;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.isYoutubeServiceURL;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.isYoutubeURL;
+
 import org.schabi.newpipe.extractor.exceptions.FoundAdException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.linkhandler.LinkHandlerFactory;
-import org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper;
 import org.schabi.newpipe.extractor.utils.Utils;
 
-import javax.annotation.Nullable;
 import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -16,6 +20,8 @@ import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import javax.annotation.Nullable;
+
 /*
  * Created by Christian Schabesberger on 02.02.16.
  *
@@ -36,17 +42,20 @@ import java.util.regex.Pattern;
  * along with NewPipe.  If not, see .
  */
 
-public class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
+public final class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
 
-    private static final Pattern YOUTUBE_VIDEO_ID_REGEX_PATTERN = Pattern.compile("^([a-zA-Z0-9_-]{11})");
-    private static final YoutubeStreamLinkHandlerFactory instance = new YoutubeStreamLinkHandlerFactory();
-    private static final List SUBPATHS = Arrays.asList("embed/", "shorts/", "watch/", "v/", "w/");
+    private static final Pattern YOUTUBE_VIDEO_ID_REGEX_PATTERN
+            = Pattern.compile("^([a-zA-Z0-9_-]{11})");
+    private static final YoutubeStreamLinkHandlerFactory INSTANCE
+            = new YoutubeStreamLinkHandlerFactory();
+    private static final List SUBPATHS
+            = Arrays.asList("embed/", "shorts/", "watch/", "v/", "w/");
 
     private YoutubeStreamLinkHandlerFactory() {
     }
 
     public static YoutubeStreamLinkHandlerFactory getInstance() {
-        return instance;
+        return INSTANCE;
     }
 
     @Nullable
@@ -68,18 +77,21 @@ public class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
     }
 
     @Override
-    public String getUrl(String id) {
+    public String getUrl(final String id) {
         return "https://www.youtube.com/watch?v=" + id;
     }
 
     @Override
-    public String getId(String urlString) throws ParsingException, IllegalArgumentException {
+    public String getId(final String theUrlString)
+            throws ParsingException, IllegalArgumentException {
+        String urlString = theUrlString;
         try {
-            URI uri = new URI(urlString);
-            String scheme = uri.getScheme();
+            final URI uri = new URI(urlString);
+            final String scheme = uri.getScheme();
 
-            if (scheme != null && (scheme.equals("vnd.youtube") || scheme.equals("vnd.youtube.launch"))) {
-                String schemeSpecificPart = uri.getSchemeSpecificPart();
+            if (scheme != null
+                    && (scheme.equals("vnd.youtube") || scheme.equals("vnd.youtube.launch"))) {
+                final String schemeSpecificPart = uri.getSchemeSpecificPart();
                 if (schemeSpecificPart.startsWith("//")) {
                     final String extractedId = extractId(schemeSpecificPart.substring(2));
                     if (extractedId != null) {
@@ -91,26 +103,25 @@ public class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
                     return assertIsId(schemeSpecificPart);
                 }
             }
-        } catch (URISyntaxException ignored) {
+        } catch (final URISyntaxException ignored) {
         }
 
-        URL url;
+        final URL url;
         try {
             url = Utils.stringToURL(urlString);
-        } catch (MalformedURLException e) {
+        } catch (final MalformedURLException e) {
             throw new IllegalArgumentException("The given URL is not valid");
         }
 
-        String host = url.getHost();
+        final String host = url.getHost();
         String path = url.getPath();
         // remove leading "/" of URL-path if URL-path is given
         if (!path.isEmpty()) {
             path = path.substring(1);
         }
 
-        if (!Utils.isHTTP(url) || !(YoutubeParsingHelper.isYoutubeURL(url) ||
-                YoutubeParsingHelper.isYoutubeServiceURL(url) || YoutubeParsingHelper.isHooktubeURL(url) ||
-                YoutubeParsingHelper.isInvidioURL(url) || YoutubeParsingHelper.isY2ubeURL(url))) {
+        if (!Utils.isHTTP(url) || !(isYoutubeURL(url) || isYoutubeServiceURL(url)
+                || isHooktubeURL(url) || isInvidioURL(url) || isY2ubeURL(url))) {
             if (host.equalsIgnoreCase("googleads.g.doubleclick.net")) {
                 throw new FoundAdException("Error found ad: " + urlString);
             }
@@ -122,16 +133,14 @@ public class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
             throw new ParsingException("Error no suitable url: " + urlString);
         }
 
-        // using uppercase instead of lowercase, because toLowercase replaces some unicode characters
-        // with their lowercase ASCII equivalent. Using toLowercase could result in faultily matching unicode urls.
+        // Using uppercase instead of lowercase, because toLowercase replaces some unicode
+        // characters with their lowercase ASCII equivalent. Using toLowercase could result in
+        // faultily matching unicode urls.
         switch (host.toUpperCase()) {
             case "WWW.YOUTUBE-NOCOOKIE.COM": {
                 if (path.startsWith("embed/")) {
-                    String id = path.substring(6); // embed/
-
-                    return assertIsId(id);
+                    return assertIsId(path.substring(6));
                 }
-
                 break;
             }
 
@@ -140,29 +149,31 @@ public class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
             case "M.YOUTUBE.COM":
             case "MUSIC.YOUTUBE.COM": {
                 if (path.equals("attribution_link")) {
-                    String uQueryValue = Utils.getQueryValue(url, "u");
+                    final String uQueryValue = Utils.getQueryValue(url, "u");
 
-                    URL decodedURL;
+                    final URL decodedURL;
                     try {
                         decodedURL = Utils.stringToURL("http://www.youtube.com" + uQueryValue);
-                    } catch (MalformedURLException e) {
+                    } catch (final MalformedURLException e) {
                         throw new ParsingException("Error no suitable url: " + urlString);
                     }
 
-                    String viewQueryValue = Utils.getQueryValue(decodedURL, "v");
+                    final String viewQueryValue = Utils.getQueryValue(decodedURL, "v");
                     return assertIsId(viewQueryValue);
                 }
 
-                String maybeId = getIdFromSubpathsInPath(path);
-                if (maybeId != null) return maybeId;
+                final String maybeId = getIdFromSubpathsInPath(path);
+                if (maybeId != null) {
+                    return maybeId;
+                }
 
-                String viewQueryValue = Utils.getQueryValue(url, "v");
+                final String viewQueryValue = Utils.getQueryValue(url, "v");
                 return assertIsId(viewQueryValue);
             }
 
             case "Y2U.BE":
             case "YOUTU.BE": {
-                String viewQueryValue = Utils.getQueryValue(url, "v");
+                final String viewQueryValue = Utils.getQueryValue(url, "v");
                 if (viewQueryValue != null) {
                     return assertIsId(viewQueryValue);
                 }
@@ -200,15 +211,17 @@ public class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
             case "YT.CYBERHOST.UK":
             case "Y.COM.CM": { // code-block for hooktube.com and Invidious instances
                 if (path.equals("watch")) {
-                    String viewQueryValue = Utils.getQueryValue(url, "v");
+                    final String viewQueryValue = Utils.getQueryValue(url, "v");
                     if (viewQueryValue != null) {
                         return assertIsId(viewQueryValue);
                     }
                 }
-                String maybeId = getIdFromSubpathsInPath(path);
-                if (maybeId != null) return maybeId;
+                final String maybeId = getIdFromSubpathsInPath(path);
+                if (maybeId != null) {
+                    return maybeId;
+                }
 
-                String viewQueryValue = Utils.getQueryValue(url, "v");
+                final String viewQueryValue = Utils.getQueryValue(url, "v");
                 if (viewQueryValue != null) {
                     return assertIsId(viewQueryValue);
                 }
@@ -225,17 +238,17 @@ public class YoutubeStreamLinkHandlerFactory extends LinkHandlerFactory {
         try {
             getId(url);
             return true;
-        } catch (FoundAdException fe) {
+        } catch (final FoundAdException fe) {
             throw fe;
-        } catch (ParsingException e) {
+        } catch (final ParsingException e) {
             return false;
         }
     }
 
-    private String getIdFromSubpathsInPath(String path) throws ParsingException {
+    private String getIdFromSubpathsInPath(final String path) throws ParsingException {
         for (final String subpath : SUBPATHS) {
             if (path.startsWith(subpath)) {
-                String id = path.substring(subpath.length());
+                final String id = path.substring(subpath.length());
                 return assertIsId(id);
             }
         }
diff --git a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeTrendingLinkHandlerFactory.java b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeTrendingLinkHandlerFactory.java
index 6d6db742..3cc21748 100644
--- a/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeTrendingLinkHandlerFactory.java
+++ b/extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeTrendingLinkHandlerFactory.java
@@ -20,8 +20,10 @@ package org.schabi.newpipe.extractor.services.youtube.linkHandler;
  * along with NewPipe.  If not, see .
  */
 
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.isInvidioURL;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.isYoutubeURL;
+
 import org.schabi.newpipe.extractor.linkhandler.ListLinkHandlerFactory;
-import org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper;
 import org.schabi.newpipe.extractor.utils.Utils;
 
 import java.net.MalformedURLException;
@@ -30,25 +32,28 @@ import java.util.List;
 
 public class YoutubeTrendingLinkHandlerFactory extends ListLinkHandlerFactory {
 
-    public String getUrl(String id, List contentFilters, String sortFilter) {
+    public String getUrl(final String id,
+                         final List contentFilters,
+                         final String sortFilter) {
         return "https://www.youtube.com/feed/trending";
     }
 
     @Override
-    public String getId(String url) {
+    public String getId(final String url) {
         return "Trending";
     }
 
     @Override
     public boolean onAcceptUrl(final String url) {
-        URL urlObj;
+        final URL urlObj;
         try {
             urlObj = Utils.stringToURL(url);
-        } catch (MalformedURLException e) {
+        } catch (final MalformedURLException e) {
             return false;
         }
 
-        String urlPath = urlObj.getPath();
-        return Utils.isHTTP(urlObj) && (YoutubeParsingHelper.isYoutubeURL(urlObj) || YoutubeParsingHelper.isInvidioURL(urlObj)) && urlPath.equals("/feed/trending");
+        final String urlPath = urlObj.getPath();
+        return Utils.isHTTP(urlObj) && (isYoutubeURL(urlObj) || isInvidioURL(urlObj))
+                && urlPath.equals("/feed/trending");
     }
 }