Added duration of video in subscription file card along with implementations of deleting subscribed videos. Subscribed videos now get reloaded after deletion

sidenav now closes when navigating

Updated subscription info to include more info

backend/subscriptions.js

@@ -64,6 +64,51 @@ async function unsubscribe(sub, deleteMode) {
 
 }
 
+async function deleteSubscriptionFile(sub, file, deleteForever) {
+    const basePath = config_api.getConfigItem('ytdl_subscriptions_base_path');
+    const useArchive = config_api.getConfigItem('ytdl_subscriptions_use_youtubedl_archive');
+    const appendedBasePath = getAppendedBasePath(sub, basePath);
+    const name = file;
+    let retrievedID = null;
+    return new Promise(resolve => {
+        let filePath = appendedBasePath;
+        var jsonPath = path.join(filePath,name+'.info.json');
+        var videoFilePath = path.join(filePath,name+'.mp4');
+        jsonPath = path.join(__dirname, jsonPath);
+        videoFilePath = path.join(__dirname, videoFilePath);
+
+        jsonExists = fs.existsSync(jsonPath);
+        videoFileExists = fs.existsSync(videoFilePath);
+
+        if (jsonExists) {
+            retrievedID = JSON.parse(fs.readFileSync(jsonPath, 'utf8'))['id'];
+            fs.unlinkSync(jsonPath);
+        }
+
+        if (videoFileExists) {
+            fs.unlink(videoFilePath, function(err) {
+                if (fs.existsSync(jsonPath) || fs.existsSync(videoFilePath)) {
+                    resolve(false);
+                } else {
+                    // check if the user wants the video to be redownloaded (deleteForever === false)
+                    if (!deleteForever && useArchive && sub.archive && retrievedID) {
+                        const archive_path = path.join(sub.archive, 'archive.txt')
+                        // if archive exists, remove line with video ID
+                        if (fs.existsSync(archive_path)) {
+                            removeIDFromArchive(archive_path, retrievedID);
+                        }
+                    }
+                    resolve(true);
+                }
+            });
+        } else {
+            // TODO: tell user that the file didn't exist
+            resolve(true);
+        }
+        
+    });
+}
+
 async function getVideosForSub(sub) {
     return new Promise(resolve => {
         const basePath = config_api.getConfigItem('ytdl_subscriptions_base_path');
@@ -199,10 +244,38 @@ const deleteFolderRecursive = function(folder_to_delete) {
     }
   };
 
-module.exports = {
-    getSubscription    : getSubscription,
-    getAllSubscriptions: getAllSubscriptions,
-    subscribe          : subscribe,
-    unsubscribe        : unsubscribe,
-    getVideosForSub    : getVideosForSub
+function removeIDFromArchive(archive_path, id) {
+    fs.readFile(archive_path, {encoding: 'utf-8'}, function(err, data) {
+        if (err) throw error;
+    
+        let dataArray = data.split('\n'); // convert file data in an array
+        const searchKeyword = id; // we are looking for a line, contains, key word id in the file
+        let lastIndex = -1; // let say, we have not found the keyword
+    
+        for (let index=0; index<dataArray.length; index++) {
+            if (dataArray[index].includes(searchKeyword)) { // check if a line contains the id keyword
+                lastIndex = index; // found a line includes a id keyword
+                break; 
+            }
+        }
+    
+        dataArray.splice(lastIndex, 1); // remove the keyword id from the data Array
+    
+        // UPDATE FILE WITH NEW DATA
+        const updatedData = dataArray.join('\n');
+        fs.writeFile(archive_path, updatedData, (err) => {
+            if (err) throw err;
+            // console.log ('Successfully updated the file data');
+        });
+    
+    });
+}
+
+module.exports = {
+    getSubscription        : getSubscription,
+    getAllSubscriptions    : getAllSubscriptions,
+    subscribe              : subscribe,
+    unsubscribe            : unsubscribe,
+    deleteSubscriptionFile : deleteSubscriptionFile,
+    getVideosForSub        : getVideosForSub
 }