Fixed issue where errored single videos in playlist/sub downloads in yt-dlp would cause the entire sub check to fail (#493)

backend/subscriptions.js

@@ -241,31 +241,32 @@ async function getVideosForSub(sub, user_uid = null) {
             logger.verbose('Subscription: finished check for ' + sub.name);
             if (err && !output) {
                 logger.error(err.stderr ? err.stderr : err.message);
-                if (err.stderr.includes('This video is unavailable')) {
+                if (err.stderr.includes('This video is unavailable') || err.stderr.includes('Private video')) {
                     logger.info('An error was encountered with at least one video, backup method will be used.')
                     try {
-                        // TODO: reimplement
-
-                        // const outputs = err.stdout.split(/\r\n|\r|\n/);
-                        // for (let i = 0; i < outputs.length; i++) {
-                        //     const output = JSON.parse(outputs[i]);
-                        //     await handleOutputJSON(sub, output, i === 0, multiUserMode)
-                        //     if (err.stderr.includes(output['id']) && archive_path) {
-                        //         // we found a video that errored! add it to the archive to prevent future errors
-                        //         if (sub.archive) {
-                        //             archive_dir = sub.archive;
-                        //             archive_path = path.join(archive_dir, 'archive.txt')
-                        //             fs.appendFileSync(archive_path, output['id']);
-                        //         }
-                        //     }
-                        // }
+                        const outputs = err.stdout.split(/\r\n|\r|\n/); // .map(jsonStr => JSON.parse(jsonStr));
+                        const files_to_download = await handleOutputJSON(outputs, sub, user_uid);
+                        resolve(files_to_download);
                     } catch(e) {
                         logger.error('Backup method failed. See error below:');
                         logger.error(e);
                     }
+                } else {
+                    logger.error('Subscription check failed!');
                 }
                 resolve(false);
             } else if (output) {
+                const files_to_download = await handleOutputJSON(output, sub, user_uid);
+                resolve(files_to_download);
+           }
+        });
+    }, err => {
+        logger.error(err);
+        updateSubscriptionProperty(sub, {downloading: false}, user_uid);
+    });
+}
+
+async function handleOutputJSON(output, sub, user_uid) {
     if (config_api.getConfigItem('ytdl_subscriptions_redownload_fresh_uploads')) {
         await setFreshUploads(sub, user_uid);
         checkVideosForFreshUploads(sub, user_uid);
@@ -273,8 +274,7 @@ async function getVideosForSub(sub, user_uid = null) {
 
     if (output.length === 0 || (output.length === 1 && output[0] === '')) {
         logger.verbose('No additional videos to download for ' + sub.name);
-                    resolve(true);
-                    return;
+        return [];
     }
 
     const output_jsons = [];
@@ -300,13 +300,7 @@ async function getVideosForSub(sub, user_uid = null) {
         await downloader_api.createDownload(file_to_download['webpage_url'], sub.type || 'video', base_download_options, user_uid, sub.id, sub.name, file_to_download);
     }
 
-                resolve(files_to_download);
-           }
-        });
-    }, err => {
-        logger.error(err);
-        updateSubscriptionProperty(sub, {downloading: false}, user_uid);
-    });
+    return files_to_download;
 }
 
 function generateOptionsForSubscriptionDownload(sub, user_uid) {