Support YouTube takeout JSON

src/common/yt.ts

@@ -6,12 +6,24 @@ const LBRY_API_HOST = 'https://api.lbry.com';
 const QUERY_CHUNK_SIZE = 300;
 
 interface YtResolverResponse {
-  success: boolean
-  error: object | null
+  success: boolean;
+  error: object | null;
   data: {
-    videos?: Record<string, string>
-    channels?: Record<string, string>
-  }
+    videos?: Record<string, string>;
+    channels?: Record<string, string>;
+  };
+}
+
+interface YtSubscription {
+  id: string;
+  etag: string;
+  title: string;
+  snippet: {
+    description: string;
+    resourceId: {
+      channelId: string;
+    };
+  };
 }
 
 /**
@@ -41,15 +53,29 @@ export const ytService = {
    * Reads the array of YT channels from an OPML file
    *
    * @param opmlContents an opml file as as tring
-   * @returns the channel URLs
+   * @returns the channel IDs
    */
   readOpml(opmlContents: string): string[] {
     const opml = new DOMParser().parseFromString(opmlContents, 'application/xml');
+
     return Array.from(opml.querySelectorAll('outline > outline'))
       .map(outline => outline.getAttribute('xmlUrl'))
+      .filter((url): url is string => !!url)
+      .map(url => ytService.getChannelId(url))
       .filter((url): url is string => !!url); // we don't want it if it's empty
   },
 
+  /**
+   * Reads an array of YT channel IDs from the YT subscriptions JSON file
+   *
+   * @param jsonContents a JSON file as a string
+   * @returns the channel IDs
+   */
+  readJson(jsonContents: string): string[] {
+    const subscriptions: YtSubscription[] = JSON.parse(jsonContents);
+    return subscriptions.map(sub => sub.snippet.resourceId.channelId);
+  },
+
   /**
    * Extracts the channelID from a YT URL.
    *
@@ -89,7 +115,7 @@ export const ytService = {
         video_ids: groups['video']?.map(s => s.id).join(','),
         channel_ids: groups['channel']?.map(s => s.id).join(','),
       }));
-      return fetch(`${LBRY_API_HOST}/yt/resolve?${params}`, {cache: 'force-cache'})
+      return fetch(`${LBRY_API_HOST}/yt/resolve?${params}`, { cache: 'force-cache' })
         .then(rsp => rsp.ok ? rsp.json() : null);
     }));
 

src/tools/YTtoLBRY.tsx

@@ -5,16 +5,19 @@ import { getSettingsAsync, redirectDomains } from '../common/settings';
 import { YTDescriptor, getFileContent, ytService } from '../common/yt';
 
 /**
- * Parses OPML file and queries the API for lbry channels
+ * Parses the subscription file and queries the API for lbry channels
  *
  * @param file to read
  * @returns a promise with the list of channels that were found on lbry
  */
-async function lbryChannelsFromOpml(file: File): Promise<string[]> {
-  const lbryUrls = await ytService.resolveById(...ytService.readOpml(await getFileContent(file))
-    .map(url => ytService.getId(url))
-    .filter((id): id is YTDescriptor => !!id));
+async function lbryChannelsFromFile(file: File) {
+  const ext = file.name.split('.').pop()?.toLowerCase();
+  const content = await getFileContent(file);
 
+  const ids: YTDescriptor[] = (ext === 'xml' || ext == 'opml' ? ytService.readOpml(content) : ytService.readJson(content))
+    .map(id => ({ id, type: 'channel' }));
+
+  const lbryUrls = await ytService.resolveById(...ids);
   const { redirect } = await getSettingsAsync('redirect');
   const urlPrefix = redirectDomains[redirect].prefix;
   return lbryUrls.map(channel => urlPrefix + channel);
@@ -24,6 +27,7 @@ function YTtoLBRY() {
   const [file, setFile] = useState(null as File | null);
   const [lbryChannels, setLbryChannels] = useState([] as string[]);
   const [isLoading, setLoading] = useState(false);
+
   return <>
     <iframe width="100%" height="400px" allowFullScreen
       src="https://lbry.tv/$/embed/howtouseconverter/c9827448d6ac7a74ecdb972c5cdf9ddaf648a28e" />
@@ -35,7 +39,7 @@ function YTtoLBRY() {
     <input type="button" value="Start Conversion!" class="goButton" disabled={!file || isLoading} onClick={async () => {
       if (!file) return;
       setLoading(true);
-      setLbryChannels(await lbryChannelsFromOpml(file));
+      setLbryChannels(await lbryChannelsFromFile(file));
       setLoading(false);
     }} />
     <ul>