Basic post display

src/lib/server/timeline.ts

@@ -0,0 +1,74 @@
+import { HASHTAG_FILTER, URL_FILTER } from '$env/static/private';
+import type { Post, Tag, TimelineEvent } from '$lib/mastodon/response';
+import { savePost } from '$lib/server/db';
+import { WebSocket } from "ws";
+/*
+Filter youtube: /v3/videos (part: snippet), /v3/videoCategories (part: snippet). Category 10 is Music
+*/
+
+const YOUTUBE_REGEX = new RegExp('https?:\/\/(www\.)?youtu((be.com\/.*v=)|(\.be\/))(?<videoId>[a-zA-Z_0-9-]+)');
+
+export class TimelineReader {
+  private static _instance: TimelineReader;
+  private constructor() {
+    //const socket = new WebSocket("wss://metalhead.club/api/v1/streaming/public/local")
+    const socket = new WebSocket("wss://metalhead.club/api/v1/streaming")
+    socket.onopen = (_event) => {
+      socket.send('{ "type": "subscribe", "stream": "public:local"}');
+    };
+    socket.onmessage = (event) => {
+      try {
+        const data: TimelineEvent = JSON.parse(event.data.toString());
+        if (data.event !== 'update') {
+          return;
+        }
+        const post: Post = JSON.parse(data.payload);
+        const hashttags: string[] = HASHTAG_FILTER.split(',');
+        const found_tags: Tag[] = post.tags.filter((t: Tag) => hashttags.includes(t.name));
+
+        const urls: string[] = URL_FILTER.split(',');
+        const found_urls = urls.filter(t => post.content.includes(t));
+
+        if (found_urls.length === 0 && found_tags.length === 0) {
+          //return;
+        }
+
+        const youtubeMatches = found_urls.map(u => u.match(YOUTUBE_REGEX)).filter(i => i !== null);
+        if (found_urls.length > 0 && youtubeMatches.length === found_urls.length) {
+          // TODO: Check with YouTube API if it is in YT music or labeled as music
+          console.info('Found youtube urls', youtubeMatches);
+        }
+        console.log(
+          "message",
+          `Update by @${post.account?.username}: ${post.content}`,
+          'tags',
+          post.tags,
+          found_tags,
+          found_urls);
+        savePost(post);
+
+      } catch (e) {
+        console.error("error message", event, event.data, e)
+      }
+
+    };
+    socket.onclose = (event) => {
+      console.log("Closed", event, event.code, event.reason)
+    };
+    socket.onerror = (event) => {
+      console.log("error", event, event.message, event.error)
+    };
+
+  }
+
+  public static init() {
+    if (this._instance === undefined) {
+      this._instance = new TimelineReader();
+    }
+  }
+
+  public static get instance(): TimelineReader {
+    TimelineReader.init();
+    return this._instance;
+  }
+}