add slash command for code previews

src/modules/codePreviews.js

@@ -1,4 +1,7 @@
-const {MessageFlags} = require("@projectdysnomia/dysnomia").Constants;
+const {ApplicationCommandOptionTypes, MessageFlags} =
+  require("@projectdysnomia/dysnomia").Constants;
+const InteractionCommand = require("../lib/interactionCommand.js");
+const {getOption} = require("../lib/interactionDispatcher.js");
 
 const events = require("../lib/events.js");
 const {hasFlag} = require("../lib/guildSettings.js");
@@ -20,7 +23,12 @@ function unindent(str) {
   return str.replace(new RegExp(`^ {${minIndent}}`, "gm"), "");
 }
 
-async function processFile(link, spoiler = false) {
+async function processFile(
+  link,
+  originalLink,
+  spoiler = false,
+  linkFile = false
+) {
   link = link.replaceAll("||", "").trim();
   const res = await fetch(link);
   if (!res.ok) return "";
@@ -28,7 +36,7 @@ async function processFile(link, spoiler = false) {
   const file = await res.text();
   const lines = file.replace(/\r/g, "").split("\n");
 
-  const fileName = decodeURI(link).substring(
+  let fileName = decodeURIComponent(link).substring(
     link.lastIndexOf("/") + 1,
     link.indexOf("#") == -1 ? link.length : link.indexOf("#")
   );
@@ -37,6 +45,10 @@ async function processFile(link, spoiler = false) {
       ? ""
       : fileName.substring(fileName.lastIndexOf(".") + 1);
 
+  if (linkFile) {
+    fileName = `[${fileName}](<${originalLink}>)`;
+  }
+
   if (fileType == "md") return "";
 
   const lineStr = link.match(/#L\d+(-L?\d+)?/)?.[0];
@@ -98,21 +110,27 @@ events.add("messageCreate", "codePreviews", async function (msg) {
   if (githubLinks?.length) {
     for (const link of githubLinks) {
       const spoiler = REGEX_SPOILER.test(link);
-      files.push(await processFile(link.replace("/blob/", "/raw/"), spoiler));
+      files.push(
+        await processFile(link.replace("/blob/", "/raw/"), link, spoiler)
+      );
     }
   }
 
   if (gitlabLinks?.length) {
     for (const link of gitlabLinks) {
       const spoiler = REGEX_SPOILER.test(link);
-      files.push(await processFile(link.replace("/blob/", "/raw/"), spoiler));
+      files.push(
+        await processFile(link.replace("/blob/", "/raw/"), link, spoiler)
+      );
     }
   }
 
   if (giteaLinks?.length) {
     for (const link of giteaLinks) {
       const spoiler = REGEX_SPOILER.test(link);
-      files.push(await processFile(link.replace("/src/", "/raw/"), spoiler));
+      files.push(
+        await processFile(link.replace("/src/", "/raw/"), link, spoiler)
+      );
     }
   }
 
@@ -155,3 +173,58 @@ events.add("messageCreate", "codePreviews", async function (msg) {
     }
   }
 });
+
+const codepreviewsCommand = new InteractionCommand("codepreview");
+codepreviewsCommand.helpText =
+  "Post snippets of codes from files on GitHub, Gitlab and Gitea instances.";
+codepreviewsCommand.options.url = {
+  name: "url",
+  type: ApplicationCommandOptionTypes.STRING,
+  description: "URL to attempt to parse",
+  required: true,
+  default: "",
+};
+codepreviewsCommand.options.spoiler = {
+  name: "spoiler",
+  type: ApplicationCommandOptionTypes.BOOLEAN,
+  description: "Send spoilered",
+  required: false,
+  default: false,
+};
+codepreviewsCommand.callback = async function (interaction) {
+  const url = getOption(interaction, codepreviewsCommand, "url");
+  const spoiler = getOption(interaction, codepreviewsCommand, "spoiler");
+
+  const githubOrGitlab = url.match(REGEX_GITHUB) ?? url.match(REGEX_GITLAB);
+  const gitea = url.match(REGEX_GITEA);
+
+  let out = "";
+  if (githubOrGitlab) {
+    out = await processFile(url.replace("/blob/", "/raw/"), url, spoiler, true);
+  } else if (gitea) {
+    out = await processFile(url.replace("/src/", "/raw/"), url, spoiler, true);
+  } else {
+    return {
+      content: "Provided link did not match any services.",
+      flags: MessageFlags.EPHEMERAL,
+    };
+  }
+
+  if (out == "") {
+    return {
+      content:
+        "No content was returned. Provided file is either too long, a markdown file, or not plaintext.",
+      flags: MessageFlags.EPHEMERAL,
+    };
+  }
+
+  if (out.length > 2000) {
+    return {
+      content: "Provided file is too long.",
+      flags: MessageFlags.EPHEMERAL,
+    };
+  }
+
+  return out;
+};
+hf.registerCommand(codepreviewsCommand);