Added max concurrent downloads setting

Fixed issue where navigating to a subscription video would make the player behave like a playlist for the whole sub

backend/app.js

@@ -779,7 +779,9 @@ async function autoUpdateYoutubeDL() {
         })
         .catch(err => {
             logger.error(`Failed to check ${default_downloader} version for an update.`)
-            logger.error(err)
+            logger.error(err);
+            resolve(false);
+            return false;
         });
     });
 }

backend/appdata/default.json

@@ -13,6 +13,7 @@
       "safe_download_override": false,
       "include_thumbnail": true,
       "include_metadata": true,
+      "max_concurrent_downloads": 5,
       "download_rate_limit": ""
     },
     "Extra": {

backend/config.js

@@ -188,6 +188,7 @@ const DEFAULT_CONFIG = {
         "safe_download_override": false,
         "include_thumbnail": true,
         "include_metadata": true,
+        "max_concurrent_downloads": 5,
         "download_rate_limit": ""
       },
       "Extra": {

backend/consts.js

@@ -42,6 +42,10 @@ exports.CONFIG_ITEMS = {
         'key': 'ytdl_include_metadata',
         'path': 'YoutubeDLMaterial.Downloader.include_metadata'
     },
+    'ytdl_max_concurrent_downloads': {
+        'key': 'ytdl_max_concurrent_downloads',
+        'path': 'YoutubeDLMaterial.Downloader.max_concurrent_downloads'
+    },
     'ytdl_download_rate_limit': {
         'key': 'ytdl_download_rate_limit',
         'path': 'YoutubeDLMaterial.Downloader.download_rate_limit'

backend/downloader.js

@@ -156,7 +156,8 @@ async function checkDownloads() {
     const waiting_downloads = downloads.filter(download => !download['paused'] && download['finished_step'] && !download['finished']);
     for (let i = 0; i < waiting_downloads.length; i++) {
         const waiting_download = waiting_downloads[i];
-        if (running_downloads_count >= 5/*config_api.getConfigItem('ytdl_max_concurrent_downloads')*/) break;
+        const max_concurrent_downloads = config_api.getConfigItem('ytdl_max_concurrent_downloads');
+        if (max_concurrent_downloads < 0 || running_downloads_count >= max_concurrent_downloads) break;
 
         if (waiting_download['finished_step'] && !waiting_download['finished']) {
             // move to next step