Fixed bug where playlist downloads would fail and progress would not show (for playlist downloads)

backend/app.js

@@ -1144,7 +1144,12 @@ async function downloadFileByURL_exec(url, type, options, sessionID = null) {
             }
 
             // store info in download for future use
-            download['_filename'] = info['_filename'];
+            if (Array.isArray(info)) {
+                download['fileNames'] = [];
+                for (let info_obj of info) download['fileNames'].push(info_obj['_filename']);
+            } else {
+                download['_filename'] = info['_filename'];
+            }
             download['filesize'] = utils.getExpectedFileSize(info);
             download_checker = setInterval(() => checkDownloadPercent(download), 1000);
         }
@@ -1621,13 +1626,15 @@ function checkDownloadPercent(download) {
     be divided by the "total expected bytes."
     */
     const file_id = download['file_id'];
-    const filename = path.format(path.parse(download['_filename'].substring(0, download['_filename'].length-4)));
+    // assume it's a playlist for logic reasons
+    const fileNames = Array.isArray(download['fileNames']) ? download['fileNames'] 
+                                                        : [path.format(path.parse(utils.removeFileExtension(download['_filename'])))];
     const resulting_file_size = download['filesize'];
 
     if (!resulting_file_size) return;
 
-    glob(`${filename}*`, (err, files) => {
-        let sum_size = 0;
+    let sum_size = 0;
+    glob(`{${fileNames.join(',')}, }*`, (err, files) => {
         files.forEach(file => {
             try {
                 const file_stats = fs.statSync(file);

backend/utils.js

@@ -105,20 +105,26 @@ function getDownloadedThumbnail(name, type, customPath = null) {
         return null;
 }
 
-function getExpectedFileSize(info_json) {
-    if (info_json['filesize']) {
-        return info_json['filesize'];
-    }
+function getExpectedFileSize(input_info_jsons) {
+    // treat single videos as arrays to have the file sizes checked/added to. makes the code cleaner
+    const info_jsons = Array.isArray(input_info_jsons) ? input_info_jsons : [input_info_jsons];
 
-    const formats = info_json['format_id'].split('+');
     let expected_filesize = 0;
-    formats.forEach(format_id => {
-        if (!info_json.formats) return expected_filesize;
-        info_json.formats.forEach(available_format => {
-            if (available_format.format_id === format_id && available_format.filesize) {
-                expected_filesize += available_format.filesize;
-            }
+    info_jsons.forEach(info_json => {
+        if (info_json['filesize']) {
+            expected_filesize += info_json['filesize'];
+            return;
+        }
+        const formats = info_json['format_id'].split('+');
+        let individual_expected_filesize = 0;
+        formats.forEach(format_id => {
+            info_json.formats.forEach(available_format => {
+                if (available_format.format_id === format_id && available_format.filesize) {
+                    individual_expected_filesize += available_format.filesize;
+                }
+            });
         });
+        expected_filesize += individual_expected_filesize;
     });
 
     return expected_filesize;