Add options to import and export user data

shard.yml

@@ -11,13 +11,16 @@ targets:
 dependencies:
   kemal:
      github: kemalcr/kemal
-     branch: master
+     branch: rework-param-parser
   pg:
     github: will/crystal-pg
     branch: master
   detect_language:
     github: detectlanguage/detectlanguage-crystal
     branch: master
+  sqlite3:
+    github: crystal-lang/crystal-sqlite3
+    branch: master
 
 crystal: 0.25.1
 

src/invidious.cr

@@ -22,6 +22,7 @@ require "option_parser"
 require "pg"
 require "xml"
 require "yaml"
+require "zip"
 require "./invidious/*"
 
 CONFIG   = Config.from_yaml(File.read("config/config.yml"))
@@ -2182,15 +2183,195 @@ get "/subscription_manager" do |env|
   end
   subscriptions = user.subscriptions
 
+  action_takeout = env.params.query["action_takeout"]?.try &.to_i?
+  action_takeout ||= 0
+  action_takeout = action_takeout == 1
+
+  format = env.params.query["format"]?
+  format ||= "rss"
+
   client = make_client(YT_URL)
   subscriptions = subscriptions.map do |ucid|
     get_channel(ucid, client, PG_DB, false)
   end
   subscriptions.sort_by! { |channel| channel.author.downcase }
 
+  if action_takeout
+    if Kemal.config.ssl || CONFIG.https_only
+      scheme = "https://"
+    else
+      scheme = "http://"
+    end
+    host = env.request.headers["Host"]
+
+    url = "#{scheme}#{host}"
+
+    if format == "json"
+      env.response.content_type = "application/json"
+      env.response.headers["content-disposition"] = "attachment"
+      next {
+        "subscriptions" => user.subscriptions,
+        "watch_history" => user.watched,
+        "preferences"   => user.preferences,
+      }.to_json
+    else
+      env.response.content_type = "application/xml"
+      env.response.headers["content-disposition"] = "attachment"
+      export = XML.build do |xml|
+        xml.element("opml", version: "1.1") do
+          xml.element("body") do
+            if format == "newpipe"
+              title = "YouTube Subscriptions"
+            else
+              title = "Invidious Subscriptions"
+            end
+
+            xml.element("outline", text: title, title: title) do
+              subscriptions.each do |channel|
+                if format == "newpipe"
+                  xmlUrl = "https://www.youtube.com/feeds/videos.xml?channel_id=#{channel.id}"
+                else
+                  xmlUrl = "#{url}/feed/channel/#{channel.id}"
+                end
+
+                xml.element("outline", text: channel.author, title: channel.author,
+                  "type": "rss", xmlUrl: xmlUrl)
+              end
+            end
+          end
+        end
+      end
+
+      next export.gsub(%(<?xml version="1.0"?>\n), "")
+    end
+  end
+
   templated "subscription_manager"
 end
 
+get "/data_control" do |env|
+  user = env.get? "user"
+  referer = env.request.headers["referer"]?
+  referer ||= "/"
+
+  if user
+    user = user.as(User)
+
+    templated "data_control"
+  else
+    env.redirect referer
+  end
+end
+
+post "/data_control" do |env|
+  user = env.get? "user"
+  referer = env.request.headers["referer"]?
+  referer ||= "/"
+
+  if user
+    user = user.as(User)
+
+    HTTP::FormData.parse(env.request) do |part|
+      body = part.body.gets_to_end
+      if body.empty?
+        next
+      end
+
+      case part.name
+      when "import_invidious"
+        body = JSON.parse(body)
+        body["subscriptions"].as_a.each do |ucid|
+          ucid = ucid.as_s
+          if !user.subscriptions.includes? ucid
+            PG_DB.exec("UPDATE users SET subscriptions = array_append(subscriptions,$1) WHERE id = $2", ucid, user.id)
+
+            begin
+              client = make_client(YT_URL)
+              get_channel(ucid, client, PG_DB, false, false)
+            rescue ex
+              next
+            end
+          end
+        end
+
+        body["watch_history"].as_a.each do |id|
+          id = id.as_s
+          if !user.watched.includes? id
+            PG_DB.exec("UPDATE users SET watched = array_append(watched,$1) WHERE id = $2", id, user.id)
+          end
+        end
+
+        PG_DB.exec("UPDATE users SET preferences = $1 WHERE id = $2", body["preferences"].to_json, user.id)
+      when "import_youtube"
+        subscriptions = XML.parse(body)
+        subscriptions.xpath_nodes(%q(//outline[@type="rss"])).each do |channel|
+          ucid = channel["xmlUrl"].match(/UC[a-zA-Z0-9_-]{22}/).not_nil![0]
+
+          if !user.subscriptions.includes? ucid
+            PG_DB.exec("UPDATE users SET subscriptions = array_append(subscriptions,$1) WHERE id = $2", ucid, user.id)
+
+            begin
+              client = make_client(YT_URL)
+              get_channel(ucid, client, PG_DB, false, false)
+            rescue ex
+              next
+            end
+          end
+        end
+      when "import_newpipe_subscriptions"
+        body = JSON.parse(body)
+        body["subscriptions"].as_a.each do |channel|
+          ucid = channel["url"].as_s.match(/UC[a-zA-Z0-9_-]{22}/).not_nil![0]
+
+          if !user.subscriptions.includes? ucid
+            PG_DB.exec("UPDATE users SET subscriptions = array_append(subscriptions,$1) WHERE id = $2", ucid, user.id)
+
+            begin
+              client = make_client(YT_URL)
+              get_channel(ucid, client, PG_DB, false, false)
+            rescue ex
+              next
+            end
+          end
+        end
+      when "import_newpipe"
+        Zip::Reader.open(body) do |file|
+          file.each_entry do |entry|
+            if entry.filename == "newpipe.db"
+              # We do this because the SQLite driver cannot parse a database from an IO
+              # Currently: channel URLs can **only** be subscriptions, and
+              # video URLs can **only** be watch history, so this works okay for now.
+
+              db = entry.io.gets_to_end
+              db.scan(/youtube\.com\/watch\?v\=(?<id>[a-zA-Z0-9_-]{11})/) do |md|
+                if !user.watched.includes? md["id"]
+                  PG_DB.exec("UPDATE users SET watched = array_append(watched,$1) WHERE id = $2", md["id"], user.id)
+                end
+              end
+
+              db.scan(/youtube\.com\/channel\/(?<ucid>[a-zA-Z0-9_-]{22})/) do |md|
+                ucid = md["ucid"]
+                if !user.subscriptions.includes? ucid
+                  PG_DB.exec("UPDATE users SET subscriptions = array_append(subscriptions,$1) WHERE id = $2", ucid, user.id)
+
+                  begin
+                    client = make_client(YT_URL)
+                    get_channel(ucid, client, PG_DB, false, false)
+                  rescue ex
+                    next
+                  end
+                end
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+
+  env.redirect referer
+end
+
 get "/subscription_ajax" do |env|
   user = env.get? "user"
   referer = env.request.headers["referer"]?

src/invidious/views/data_control.ecr

@@ -0,0 +1,50 @@
+<% content_for "header" do %>
+<title>Import and Export Data - Invidious</title>
+<% end %>
+
+<div class="h-box">
+    <form class="pure-form pure-form-aligned" enctype="multipart/form-data" action="/data_control" method="post">
+        <fieldset>
+            <legend>Import</legend>
+
+            <div class="pure-control-group">
+                <label for="import_youtube">Import Invidious data</label>
+                <input type="file" id="import_invidious" name="import_invidious">
+            </div>
+
+            <div class="pure-control-group">
+                <label for="import_youtube">Import <a target="_blank" style="color: #0366d6"
+                        href="https://support.google.com/youtube/answer/6224202?hl=en-GB">YouTube subscriptions</a></label>
+                <input type="file" id="import_youtube" name="import_youtube">
+            </div>
+            
+            <div class="pure-control-group">
+                <label for="import_newpipe_subscriptions">Import NewPipe subscriptions (.json)</label>
+                <input type="file" id="import_newpipe_subscriptions" name="import_newpipe_subscriptions">
+            </div>
+
+            <div class="pure-control-group">
+                <label for="import_newpipe">Import NewPipe data (.zip)</label>
+                <input type="file" id="import_newpipe" name="import_newpipe">
+            </div>
+        
+            <div class="pure-controls">
+                <button type="submit" class="pure-button pure-button-primary">Import</button>
+            </div>
+
+            <legend>Export</legend>
+
+            <div class="pure-control-group">
+                <a href="/subscription_manager?action_takeout=1">Export subscriptions as OPML</a>
+            </div>
+
+            <div class="pure-control-group">
+                <a href="/subscription_manager?action_takeout=1&format=newpipe">Export subscriptions as OPML (NewPipe)</a>
+            </div>
+
+            <div class="pure-control-group">
+                <a href="/subscription_manager?action_takeout=1&format=json">Export data as JSON</a>
+            </div>
+        </fieldset>
+    </form>
+</div>

src/invidious/views/preferences.ecr

@@ -101,7 +101,13 @@ function update_value(element) {
             <div class="pure-control-group">
                 <label>
                     <a href="/clear_watch_history">Clear watch history</a>
-                </labe>
+                </label>
+            </div>
+            
+            <div class="pure-control-group">
+                <label>
+                    <a href="/data_control">Import/Export data</a>
+                </label>
             </div>
 
             <div class="pure-controls">

src/invidious/views/subscription_manager.ecr

@@ -2,7 +2,16 @@
 <title>Subscription manager - Invidious</title>
 <% end %>
 
-<h1><%= subscriptions.size %> subscriptions</h1>
+<div class="pure-g h-box">
+    <div class="pure-u-2-3">
+        <h3><%= subscriptions.size %> subscriptions</h3>
+    </div>
+    <div class="pure-u-1-3" style="text-align:right;">
+        <h3>
+            <a href="/data_control">Import/Export</a>
+        </h3>
+    </div>
+</div>
 
 <% subscriptions.each do |channel| %>
 <h3 class="h-box">