11.21提交

store/downloadStoreVideo.js

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+// 下载任务全局状态管理
+class DownloadStore {
+	constructor() {
+		let tasks = uni.getStorageSync('downloadVideoTasks');
+		this.tasks = tasks || [] ; // 下载任务列表
+		this.listeners = []; // 监听器列表
+	}
+	
+	// 添加任务
+	addTask(data) {
+		const taskIndex = this.tasks.length;
+		const taskItem = {
+			id: Date.now() + Math.random(), // 唯一ID
+			url: '',
+			status: 'downloading', // downloading, paused, completed, failed
+			progress: 0,
+			totalSize:0,
+			downloadSize:0,
+			task: null,
+			filePath: '',
+			imgpath:'',
+			author:'',
+			name:'',
+			duration:'',
+			size:'',
+			createTime: Date.now(),
+			localPath:''
+		};
+		Object.assign(taskItem, data);
+		this.tasks.push(taskItem);
+		this.notifyListeners();
+		this.saveToStorage();
+		
+		return taskIndex;
+	}
+	
+	// 更新任务
+	updateTask(index, updates) {
+		if (this.tasks[index]) {
+			Object.assign(this.tasks[index], updates);
+			this.notifyListeners();
+			this.saveToStorage();
+		}
+	}
+	
+	// 删除任务
+	removeTask(index) {
+		const taskItem = this.tasks[index];
+		if (taskItem && taskItem.task && taskItem.status === 'downloading') {
+			taskItem.task.abort();
+		}
+		this.tasks.splice(index, 1);
+		this.notifyListeners();
+		this.saveToStorage();
+	}
+	
+	// 获取所有任务
+	getTasks() {
+		return this.tasks;
+	}
+	
+	// 获取任务
+	getTask(index) {
+		return this.tasks[index];
+	}
+	
+	// 添加监听器
+	addListener(callback) {
+		this.listeners.push(callback);
+		// 返回取消监听的函数
+		return () => {
+			const index = this.listeners.indexOf(callback);
+			if (index > -1) {
+				this.listeners.splice(index, 1);
+			}
+		};
+	}
+	
+	// 通知所有监听器
+	notifyListeners() {
+		// 创建新数组引用，确保Vue能检测到变化
+		const tasksCopy = [...this.tasks];
+		this.listeners.forEach(callback => {
+			try {
+				callback(tasksCopy);
+			} catch (e) {
+				console.error('DownloadStore listener error:', e);
+			}
+		});
+	}
+	
+	// 保存到本地存储
+	saveToStorage() {
+		// 只保存基本信息，不保存task对象
+		const tasksToSave = this.tasks.map(item => ({
+			id: item.id,
+			url: item.url,
+			status: item.status,
+			progress: item.progress,
+			filePath: item.filePath,
+			createTime: item.createTime,
+			imgpath:item.imgpath,
+			author:item.author,
+			name:item.name,
+			duration:item.duration,
+			size:item.size,
+			totalSize:item.totalSize,
+			downloadSize:item.downloadSize,
+			localPath:item.localPath,
+		}));
+		uni.setStorageSync('downloadVideoTasks', tasksToSave);
+	}
+	
+	// 从本地存储加载
+	loadFromStorage() {
+		const savedTasks = uni.getStorageSync('downloadVideoTasks');
+		if (savedTasks && Array.isArray(savedTasks)) {
+			this.tasks = savedTasks.map(item => ({
+				...item,
+				task: null // task对象无法序列化，需要重新创建
+			}));
+			this.notifyListeners();
+		}
+	}
+	
+	// 恢复下载中的任务
+	resumeDownloadingTasks(startDownloadCallback) {
+		this.tasks.forEach((taskItem, index) => {
+			// 如果任务状态是下载中，但task对象为null，说明需要重新创建下载任务
+			if (taskItem.status === 'downloading' && !taskItem.task) {
+				if (typeof startDownloadCallback === 'function') {
+					startDownloadCallback(index);
+				}
+			}
+		});
+	}
+}
+
+// 创建单例
+const downloadStore = new DownloadStore();
+
+// 在应用启动时加载存储的任务
+// #ifndef VUE3
+if (typeof Vue !== 'undefined') {
+	Vue.prototype.$downloadStore = downloadStore;
+}
+// #endif
+
+export default downloadStore;