added seek bar functionality

script.js

@@ -1,8 +1,8 @@
 // ==UserScript==
 // @name         antisocial.moe - youtube music scrobbler
 // @namespace    http://tampermonkey.net/
-// @version      2.0
+// @version      2.1
-// @author
+// @description  Scrobbles songs from YouTube Music to antisocial.moe, with progress bar monitoring
 // @match        https://music.youtube.com/*
 // @grant        GM_xmlhttpRequest
 // @grant        GM_setValue
@@ -186,6 +186,90 @@
     // Timer for scrobbling after 10 seconds of playback
     let playbackTimer = null;
 
+    /**
+     * ============================
+     * Progress Monitoring Logic
+     * ============================
+     */
+
+    /**
+     * Gets the current progress percentage of the song.
+     * @returns {number|null} Progress percentage (0-100) or null if not available.
+     */
+    function getProgressPercentage() {
+        const progressBar = querySelectorDeep('#progress-bar');
+        if (progressBar) {
+            const valueNow = parseInt(progressBar.getAttribute('aria-valuenow'), 10);
+            const valueMax = parseInt(progressBar.getAttribute('aria-valuemax'), 10);
+            if (!isNaN(valueNow) && !isNaN(valueMax) && valueMax > 0) {
+                return (valueNow / valueMax) * 100;
+            }
+        }
+        return null;
+    }
+
+    // Variable to keep track of last progress percentage
+    let lastProgressPercentage = null;
+
+    /**
+     * Handles progress changes and detects jumps from >95% to <5%.
+     * @param {number} newPercentage - The new progress percentage.
+     */
+    function handleProgressChange(newPercentage) {
+        if (lastProgressPercentage === null) {
+            lastProgressPercentage = newPercentage;
+            return;
+        }
+        if (lastProgressPercentage > 95 && newPercentage < 5) {
+            console.log('Progress jumped from >95% to <5%. Sending new scrobble.');
+            const songInfo = getSongInfo();
+            if (songInfo) {
+                scrobble(songInfo.title, songInfo.author, songInfo.album);
+            } else {
+                console.warn('Cannot scrobble: song information not found.');
+            }
+        }
+        lastProgressPercentage = newPercentage;
+    }
+
+    /**
+     * Initializes a MutationObserver to monitor the progress bar's aria-valuenow.
+     */
+    function initProgressObserver() {
+        const progressBar = querySelectorDeep('#progress-bar');
+        if (!progressBar) {
+            console.error('Progress bar not found. Progress monitoring not initialized.');
+            return;
+        }
+
+        // Initialize lastProgressPercentage
+        lastProgressPercentage = getProgressPercentage();
+        console.debug('Initial progress percentage:', lastProgressPercentage);
+
+        // Create observer
+        const progressObserver = new MutationObserver((mutations) => {
+            for (let mutation of mutations) {
+                if (mutation.type === 'attributes' && mutation.attributeName === 'aria-valuenow') {
+                    const newPercentage = getProgressPercentage();
+                    if (newPercentage !== null) {
+                        console.debug(`Progress updated: ${newPercentage.toFixed(2)}%`);
+                        handleProgressChange(newPercentage);
+                    }
+                }
+            }
+        });
+
+        // Observe aria-valuenow
+        progressObserver.observe(progressBar, { attributes: true, attributeFilter: ['aria-valuenow'] });
+        console.log('Progress observer initialized.');
+    }
+
+    /**
+     * ============================
+     * Scrobbling Logic (continued)
+     * ============================
+     */
+
     /**
      * Handles the scrobbling logic when a song change or playback state change is detected.
      * Scrobbles the song only if it has been playing for more than 10 seconds and is currently playing.
@@ -208,6 +292,10 @@
             if (!areSongsEqual(lastScrobbledSong, songInfo)) {
                 console.log(`New song detected: "${songInfo.title}" by ${songInfo.author} from "${songInfo.album}"`);
 
+                // Check if the song is currently playing
+                if (isPlaying() && !scrobbleScheduled) {
+                      scrobbleScheduled = true;
+
                       // Update lastScrobbledSong to prevent repeated attempts
                       // Note: We update it here to prevent multiple timers for the same song
                       lastScrobbledSong = songInfo;
@@ -216,12 +304,9 @@
                       if (playbackTimer) {
                           clearTimeout(playbackTimer);
                           playbackTimer = null;
+                          scrobbleScheduled = false;
                       }
 
-                // Check if the song is currently playing
-                if (isPlaying()) {
-                    if (!scrobbleScheduled) {
-                        scrobbleScheduled = true;
                       playbackTimer = setTimeout(() => {
                           if (isPlaying()) {
                               scrobble(songInfo.title, songInfo.author, songInfo.album);
@@ -232,7 +317,8 @@
                           }
                       }, 10000); // 10 seconds
                       console.log('Started 10-second timer for scrobble.');
-                    }
+                } else {
+                  console.debug(`isPlaying: ${isPlaying()} scrobbleScheduled: ${scrobbleScheduled}`)
                 }
             } else {
                 console.debug('Same song, no action needed.');
@@ -298,6 +384,12 @@
         console.log('YouTube Music Scrobbler with Conditional Scrobbling is now active.');
     }
 
+    /**
+     * ============================
+     * Initialization
+     * ============================
+     */
+
     /**
      * Waits for the player bar to be available in the DOM before initializing the observer.
      */
@@ -309,6 +401,9 @@
                 initObserver();
                 // Initial scrobble handling
                 handleScrobble();
+
+                // Initialize progress observer
+                initProgressObserver();
             }
         }, 1000); // Check every second
 
@@ -319,12 +414,6 @@
         // }, 30000); // 30 seconds
     }
 
-    /**
-     * ============================
-     * UI for Managing AUTH_KEY
-     * ============================
-     */
-
     /**
      * Prompts the user to enter their AUTH_KEY and stores it using GM_setValue.
      */
@@ -350,15 +439,8 @@
     }
 
     /**
-     * ============================
+     * Optionally, prompt the user to set the AUTH_KEY if it's not already set.
-     * Initialization
-     * ============================
      */
-
-    // Register the menu command for setting the AUTH_KEY
-    registerMenuCommands();
-
-    // Optionally, prompt the user to set the AUTH_KEY if it's not already set
     function promptForAuthKeyIfNeeded() {
         const authKey = GM_getValue('AUTH_KEY', '');
         if (!authKey) {
@@ -366,6 +448,9 @@
         }
     }
 
+    // Register the menu command for setting the AUTH_KEY
+    registerMenuCommands();
+
     // Start the script by waiting for the player bar to load
     waitForPlayerBar();
 
@@ -373,4 +458,3 @@
     promptForAuthKeyIfNeeded();
 
 })();
-