Added backend and database support for video streaming

Added UI support for video streaming. branch is now feature-complete

backend/app.js

@@ -1708,11 +1708,13 @@ app.post('/api/subscribe', async (req, res) => {
     let name = req.body.name;
     let url = req.body.url;
     let timerange = req.body.timerange;
+    let streamingOnly = req.body.streamingOnly;
 
     const new_sub = {
                         name: name,
                         url: url,
-                        id: uuid()
+                        id: uuid(),
+                        streamingOnly: streamingOnly
                     };
 
     // adds timerange if it exists, otherwise all videos will be downloaded
@@ -1781,7 +1783,7 @@ app.post('/api/getSubscription', async (req, res) => {
     }
 
     // get sub videos
-    if (subscription.name) {
+    if (subscription.name && !subscription.streamingOnly) {
         let base_path = config_api.getConfigItem('ytdl_subscriptions_base_path');
         let appended_base_path = path.join(base_path, subscription.isPlaylist ? 'playlists' : 'channels', subscription.name, '/');
         let files;
@@ -1817,6 +1819,19 @@ app.post('/api/getSubscription', async (req, res) => {
             parsed_files.push(file_obj);
         }
 
+        res.send({
+            subscription: subscription,
+            files: parsed_files
+        });
+    } else if (subscription.name && subscription.streamingOnly) {
+        // return list of videos
+        let parsed_files = [];
+        if (subscription.videos) {
+            for (let i = 0; i < subscription.videos.length; i++) {
+                const video = subscription.videos[i];
+                parsed_files.push(new File(video.title, video.title, video.thumbnail, false, video.duration, video.url, video.uploader, video.size, null, null, video.upload_date));
+            }
+        }
         res.send({
             subscription: subscription,
             files: parsed_files

backend/subscriptions.js

@@ -187,6 +187,7 @@ async function getVideosForSub(sub) {
             resolve(false);
             return;
         }
+        const sub_db = db.get('subscriptions').find({id: sub.id});
         const basePath = config_api.getConfigItem('ytdl_subscriptions_base_path');
         const useArchive = config_api.getConfigItem('ytdl_subscriptions_use_youtubedl_archive');
 
@@ -199,10 +200,6 @@ async function getVideosForSub(sub) {
 
         let downloadConfig = ['-o', appendedBasePath + '/%(title)s.mp4', '-f', 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/mp4', '-ciw', '--write-annotations', '--write-thumbnail', '--write-info-json', '--print-json'];
 
-        if (sub.timerange) {
-            downloadConfig.push('--dateafter', sub.timerange);
-        }
-
         let archive_dir = null;
         let archive_path = null;
 
@@ -214,6 +211,15 @@ async function getVideosForSub(sub) {
             downloadConfig.push('--download-archive', archive_path);
         }
 
+        // if streaming only mode, just get the list of videos
+        if (sub.streamingOnly) {
+            downloadConfig = ['-f', 'best', '--dump-json'];
+        }
+
+        if (sub.timerange) {
+            downloadConfig.push('--dateafter', sub.timerange);
+        }
+
         // get videos 
         logger.verbose('Subscribe: getting videos for subscription ' + sub.name);
         youtubedl.exec(sub.url, downloadConfig, {}, function(err, output) {
@@ -236,6 +242,18 @@ async function getVideosForSub(sub) {
                         continue;
                     }
 
+                    if (sub.streamingOnly) {
+                        if (i === 0) {
+                            sub_db.assign({videos: []}).write();
+                        }
+
+                        // remove unnecessary info
+                        output_json.formats = null;
+
+                        // add to db
+                        sub_db.get('videos').push(output_json).write();
+                    }
+
                     // TODO: Potentially store downloaded files in db?
         
                 }