Added v1 of chat sidebar for Twitch VODs

backend/twitch.js

@@ -0,0 +1,71 @@
+var moment = require('moment');
+var Axios = require('axios');
+
+async function getCommentsForVOD(clientID, vodId) {
+    let url = `https://api.twitch.tv/v5/videos/${vodId}/comments?content_offset_seconds=0`,
+        batch,
+        cursor;
+
+    let comments = null;
+
+    try {
+        do {
+            batch = (await Axios.get(url, {
+                headers: {
+                    'Client-ID': clientID,
+                    Accept: 'application/vnd.twitchtv.v5+json; charset=UTF-8',
+                    'Content-Type': 'application/json; charset=UTF-8',
+                }
+            })).data;
+
+            const str = batch.comments.map(c => {
+                let {
+                        created_at: msgCreated,
+                        content_offset_seconds: timestamp,
+                        commenter: {
+                            name,
+                            _id,
+                            created_at: acctCreated
+                        },
+                        message: {
+                            body: msg
+                        }
+                    } = c;
+
+                const timestamp_str = moment.duration(timestamp, 'seconds')
+                    .toISOString()
+                    .replace(/P.*?T(?:(\d+?)H)?(?:(\d+?)M)?(?:(\d+).*?S)?/,
+                        (_, ...ms) => {
+                            const seg = v => v ? v.padStart(2, '0') : '00';
+                            return `${seg(ms[0])}:${seg(ms[1])}:${seg(ms[2])}`;
+                        });
+
+                acctCreated = moment(acctCreated).utc();
+                msgCreated = moment(msgCreated).utc();
+
+                if (!comments) comments = [];
+
+                comments.push({
+                    timestamp: timestamp,
+                    timestamp_str: timestamp_str,
+                    name: name,
+                    message: msg
+                });
+                // let line = `${timestamp},${msgCreated.format(tsFormat)},${name},${_id},"${msg.replace(/"/g, '""')}",${acctCreated.format(tsFormat)}`;
+                // return line;
+            }).join('\n');
+
+            cursor = batch._next;
+            url = `https://api.twitch.tv/v5/videos/${vodId}/comments?cursor=${cursor}`;
+            await new Promise(res => setTimeout(res, 300));
+        } while (cursor);
+    } catch (err) {
+        console.error(err);
+    }
+
+    return comments;
+}
+
+module.exports = {
+    getCommentsForVOD: getCommentsForVOD
+}