feat: 跳转至下一首功能

src/components/Player.vue

@@ -7,6 +7,7 @@ import apis from '../apis'
 const playQueue = usePlayQueueStore()
 
 const resourcesUrl = ref<{ [key: string]: string }>({})
+const audioRefs = ref<{ [key: string]: HTMLAudioElement }>({}) // audio 元素的引用
 
 // 监听播放列表变化
 watch(() => playQueue.queue, async () => {
@@ -20,9 +21,10 @@ watch(() => playQueue.queue, async () => {
 	resourcesUrl.value = newResourcesUrl
 })
 
-// 在播放曲目变动时，将元数据更新到浏览器和操作系统中
+watch(() => playQueue.currentTrack, async (newTrack, oldTrack) => {
-watch(() => playQueue.currentTrack, async () => {
 	if (!playQueue.currentTrack) return
+
+	// 更新元数据
 	navigator.mediaSession.metadata = new MediaMetadata({
 		title: playQueue.currentTrack.song.name,
 		artist: artistsOrganize(playQueue.currentTrack.song.artists ?? []),
@@ -35,6 +37,30 @@ watch(() => playQueue.currentTrack, async () => {
 			},
 		],
 	})
+	navigator.mediaSession.setActionHandler('previoustrack', () => {})
+	navigator.mediaSession.setActionHandler('nexttrack', playQueue.skipToNext)
+
+	// 如果目前歌曲变动时正在播放，则激活对应的 audio 组件，并将播放时间进度重置为零
+	if (!playQueue.isPlaying) return
+	debugPlayer("正在播放，变更至下一首歌")
+	if (oldTrack) {
+		const oldAudio = getAudioElement(oldTrack.song.cid)
+		if (oldAudio && !oldAudio.paused) {
+			oldAudio.pause()
+		}
+	}
+
+	const newAudio = getAudioElement(newTrack.song.cid)
+	if (newAudio) {
+		try {
+			await newAudio.play()
+			debugPlayer(`开始播放: audio-${newTrack.song.cid}`)
+		} catch (error) {
+			console.error(`播放失败: audio-${newTrack.song.cid}`, error)
+		}
+	} else {
+		console.warn(`找不到音频元素: audio-${newTrack.song.cid}`)
+	}
 })
 
 // 优化音乐人字符串显示
@@ -65,6 +91,32 @@ function isAutoPlay(cid: string) {
 
 	return true	
 }
+
+// 获取 audio 元素的 ref
+function getAudioElement(cid: string): HTMLAudioElement | null {
+	debugPlayer('Getting audio element for:', cid, audioRefs.value)
+	return audioRefs.value[cid] || null
+}
+
+// audio 元素结束播放事件
+function endOfPlay() {
+	debugPlayer("结束播放")
+	if (playQueue.loopingMode !== "single") {
+		const next = playQueue.queue[playQueue.currentIndex + 1]
+		debugPlayer(next.song.cid)
+		debugPlayer(audioRefs.value[next.song.cid])
+		audioRefs.value[next.song.cid].play()
+	}
+}
+
+function setAudioRef(cid: string, el: HTMLAudioElement | null) {
+	if (el) {
+		audioRefs.value[cid] = el
+		debugPlayer(`Audio element for ${cid} registered`, el)
+	} else {
+		delete audioRefs.value[cid]
+	}
+}
 </script>
 
 <template>
@@ -74,9 +126,12 @@ function isAutoPlay(cid: string) {
 				v-if="resourcesUrl[track.song.cid]" 
 				:src="resourcesUrl[track.song.cid]" 
 				preload="auto" 
-				:ref="`audio-${track.song.cid}`"
+				:ref="el => setAudioRef(track.song.cid, el as HTMLAudioElement)"
 				:autoplay="isAutoPlay(track.song.cid)"
+				@ended="endOfPlay"
+				@timeupdate=""
 			/>
+				{{track.song.cid}}
 		</div>
 	</div>
 </template>

src/stores/usePlayQueueStore.ts

@@ -1,5 +1,6 @@
 import { defineStore } from 'pinia'
 import { ref, computed } from 'vue'
+import { debugStore } from '../utils/debug'
 
 export const usePlayQueueStore = defineStore('queue', () => {
 	// 内部状态
@@ -10,6 +11,7 @@ export const usePlayQueueStore = defineStore('queue', () => {
 	const currentPlaying = ref(0) // 当前播放指针，指针在 queueOrder 中寻址（无论是否开启了随机播放）
 	const queueOrder = ref<number[]>([]) // 播放队列顺序
 	const isPlaying = ref(false)
+	const playProgress = ref(0) // 当前曲目的播放时间指针
 
 	// 暴露给外部的响应式只读引用
 	const queueState = computed(() =>
@@ -27,6 +29,9 @@ export const usePlayQueueStore = defineStore('queue', () => {
 		return queue.value[actualIndex] || null
 	})
 	
+	// 获取当前播放时间
+	const playProgressState = computed(() => playProgress.value)
+	
 	// 获取当前是否正在播放
 	const playingState = computed(() => isPlaying.value)
 
@@ -62,7 +67,6 @@ export const usePlayQueueStore = defineStore('queue', () => {
 
 	/***********
 	 * 播放控制相关
-	 *
 	 **********/
 	// 控制播放
 	const togglePlay = (turnTo?: boolean) => {
@@ -71,6 +75,33 @@ export const usePlayQueueStore = defineStore('queue', () => {
 		isPlaying.value = newPlayState
 	}
 
+	// 跳转至队列的某首歌曲
+	const toggleQueuePlay = (turnTo: number) => {
+		if (turnTo < 0 || turnTo >= queue.value.length) return
+		currentPlaying.value = turnTo
+	}
+
+	// 跳至下一首（通常为用户点按下一首按钮）
+	const skipToNext = () => {
+		currentPlaying.value = currentPlaying.value + 1
+	}
+
+	// 继续播放接下来的曲目
+	// 通常为当前曲目播放完毕，需要通过循环模式判断应该重置进度或队列指针 +1
+	const continueToNext = () => {
+		debugStore(loopingMode.value)
+		// TODO: 需要留意 progress seeking 相关
+		if (loopingMode.value === 'single') playProgress.value = 0
+		else currentPlaying.value = currentPlaying.value + 1
+	}
+
+	// 回报播放进度
+	const reportPlayProgress = (progress: number) => {
+		debugStore(`进度更新回报: ${progress}`)
+		playProgress.value = progress
+	}
+
+
 	/************
 	 * 播放模式相关
 	 **********/
@@ -81,7 +112,7 @@ export const usePlayQueueStore = defineStore('queue', () => {
 
 		if (newShuffleState === isShuffle.value) return // 状态未改变
 
-		// TODO: 进行洗牌
+		// TODO: 进行洗牌（以下代码是 AI 写的，需要人工复查）
 		/* if (newShuffleState) {
 			// 开启随机播放：保存当前顺序并打乱
 			const originalOrder = [...queueOrder.value]
@@ -149,11 +180,16 @@ export const usePlayQueueStore = defineStore('queue', () => {
 		currentTrack,
 		currentIndex: currentPlaying,
 		isPlaying: playingState,
+		playProgress: playProgressState,
 
 		// 修改方法
 		replaceQueue,
 		toggleShuffle,
 		toggleLoop,
-		togglePlay
+		togglePlay,
+		toggleQueuePlay,
+		skipToNext,
+		continueToNext,
+		reportPlayProgress
 	}
 })