1193 lines
36 KiB
JavaScript
1193 lines
36 KiB
JavaScript
const path = require('path');
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const ArtworkService = require('./artwork');
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const ArtistService = require('./artist');
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const TaskManager = require('./task-manager');
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const FileManager = require('./file-manager');
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const ProgressManager = require('./progress-manager');
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const HistoryManager = require('./history-manager');
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const DownloadExecutor = require('./download-executor');
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const DownloadRegistry = require('./download-registry');
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const CacheConfigManager = require('../config/cache-config');
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const fs = require('fs-extra'); // Added for fs-extra
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const { defaultLogger } = require('../utils/logger');
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// 创建logger实例
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const logger = defaultLogger.child('DownloadService');
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/**
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* 下载服务 - 主服务类，协调各个管理器
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*/
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class DownloadService {
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constructor(auth) {
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this.auth = auth;
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this.artworkService = new ArtworkService(auth);
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this.artistService = new ArtistService(auth);
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this.cacheConfigManager = new CacheConfigManager();
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// 检测是否在pkg打包环境中运行
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const isPkg = process.pkg !== undefined;
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if (isPkg) {
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// 在打包环境中，使用可执行文件所在目录
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this.dataPath = path.join(process.cwd(), 'data');
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} else {
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// 在开发环境中，使用相对路径
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this.dataPath = path.join(__dirname, '../../data');
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}
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// 初始化各个管理器
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this.fileManager = new FileManager();
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this.taskManager = new TaskManager(this.dataPath);
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this.progressManager = new ProgressManager();
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this.historyManager = new HistoryManager(this.dataPath);
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this.downloadRegistry = new DownloadRegistry(this.dataPath);
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// 先创建下载执行器，稍后在init方法中设置downloadService引用
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this.downloadExecutor = new DownloadExecutor(this.fileManager, this.taskManager, this.progressManager, this.historyManager, this);
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this.initialized = false;
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}
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/**
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* 获取动态并发配置
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*/
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async getConcurrentConfig() {
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try {
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const cacheConfig = await this.cacheConfigManager.loadConfig();
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return {
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concurrentDownloads: cacheConfig.download?.concurrentDownloads || 3,
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maxConcurrentFiles: cacheConfig.download?.maxConcurrentFiles || 5,
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};
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} catch (error) {
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logger.warn('获取并发配置失败，使用默认值:', error.message);
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return {
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concurrentDownloads: 3,
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maxConcurrentFiles: 5,
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};
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}
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}
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/**
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* 初始化服务
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*/
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async init() {
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try {
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// 确保目录存在
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const downloadPath = await this.fileManager.getDownloadPath();
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await this.fileManager.ensureDirectory(downloadPath);
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await this.fileManager.ensureDirectory(this.dataPath);
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// 初始化各个管理器
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await this.taskManager.init();
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await this.historyManager.init();
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await this.downloadRegistry.init();
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this.initialized = true;
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// 下载服务初始化完成
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} catch (error) {
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logger.error('下载服务初始化失败:', error);
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this.initialized = false;
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}
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}
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// 代理方法 - 进度管理
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addProgressListener(taskId, listener) {
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return this.progressManager.addProgressListener(taskId, listener);
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}
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removeProgressListener(taskId, listener) {
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return this.progressManager.removeProgressListener(taskId, listener);
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}
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notifyProgressUpdate(taskId, task) {
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return this.progressManager.notifyProgressUpdate(taskId, task);
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}
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// 代理方法 - 任务管理
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getTask(taskId) {
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return this.taskManager.getTask(taskId);
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}
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async getTaskProgress(taskId) {
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const task = this.taskManager.getTask(taskId);
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if (!task) {
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return { success: false, error: '任务不存在' };
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}
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return {
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success: true,
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data: task,
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};
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}
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async getAllTasks() {
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return {
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success: true,
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data: this.taskManager.getAllTasks(),
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};
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}
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/**
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* 获取活跃任务（下载中或暂停）
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*/
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async getActiveTasks() {
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return {
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success: true,
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data: this.taskManager.getActiveTasks(),
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};
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}
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/**
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* 获取任务摘要（用于快速状态检查）
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*/
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async getTasksSummary() {
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const allTasks = this.taskManager.getAllTasks();
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const activeTasks = this.taskManager.getActiveTasks();
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const summary = {
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total: allTasks.length,
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active: activeTasks.length,
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downloading: activeTasks.filter(t => t.status === 'downloading').length,
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paused: activeTasks.filter(t => t.status === 'paused').length,
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completed: allTasks.filter(t => t.status === 'completed').length,
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failed: allTasks.filter(t => t.status === 'failed').length,
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cancelled: allTasks.filter(t => t.status === 'cancelled').length,
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partial: allTasks.filter(t => t.status === 'partial').length,
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lastUpdate: Date.now()
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};
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return {
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success: true,
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data: summary,
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};
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}
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/**
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* 获取任务变更（增量更新）
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*/
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async getTasksChanges(since = null) {
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const allTasks = this.taskManager.getAllTasks();
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if (!since) {
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// 如果没有since参数，返回所有活跃任务
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return {
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success: true,
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data: {
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tasks: this.taskManager.getActiveTasks(),
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lastUpdate: Date.now()
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},
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};
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}
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// 过滤出自指定时间后有变更的任务
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const changedTasks = allTasks.filter(task => {
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const lastModified = Math.max(
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new Date(task.created_at).getTime(),
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task.updated_at ? new Date(task.updated_at).getTime() : 0,
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task.end_time ? new Date(task.end_time).getTime() : 0
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);
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return lastModified > since;
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});
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return {
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success: true,
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data: {
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tasks: changedTasks,
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lastUpdate: Date.now()
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},
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};
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}
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/**
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* 获取已完成任务（分页）
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*/
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async getCompletedTasks(offset = 0, limit = 50) {
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const allTasks = this.taskManager.getAllTasks();
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const completedTasks = allTasks.filter(task =>
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['completed', 'failed', 'cancelled', 'partial'].includes(task.status)
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);
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// 按完成时间倒序排列
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completedTasks.sort((a, b) => {
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const timeA = a.end_time ? new Date(a.end_time).getTime() : 0;
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const timeB = b.end_time ? new Date(b.end_time).getTime() : 0;
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return timeB - timeA;
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});
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const paginatedTasks = completedTasks.slice(offset, offset + limit);
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return {
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success: true,
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data: {
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tasks: paginatedTasks,
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total: completedTasks.length,
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offset,
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limit
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},
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};
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}
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async cancelTask(taskId) {
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const task = this.taskManager.getTask(taskId);
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if (!task) {
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return { success: false, error: '任务不存在' };
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}
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await this.taskManager.updateTask(taskId, {
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status: 'cancelled',
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end_time: new Date(),
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});
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this.progressManager.notifyProgressUpdate(taskId, task);
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return { success: true };
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}
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async pauseTask(taskId) {
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const task = this.taskManager.getTask(taskId);
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if (!task) {
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return { success: false, error: '任务不存在' };
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}
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// 只允许暂停正在下载的任务
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if (task.status !== 'downloading') {
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return { success: false, error: '只能暂停正在下载的任务' };
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}
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await this.taskManager.updateTask(taskId, { status: 'paused' });
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// 获取更新后的任务
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const updatedTask = this.taskManager.getTask(taskId);
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this.progressManager.notifyProgressUpdate(taskId, updatedTask);
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return { success: true, data: updatedTask };
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}
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async resumeTask(taskId) {
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const task = this.taskManager.getTask(taskId);
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if (!task) {
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logger.error('恢复任务失败：任务不存在', { taskId });
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return { success: false, error: '任务不存在' };
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}
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// logger.info('尝试恢复任务', {
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// taskId,
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// currentStatus: task.status,
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// type: task.type,
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// artwork_id: task.artwork_id
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// });
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// 只允许恢复暂停的任务
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if (task.status !== 'paused') {
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logger.warn('恢复任务失败：任务状态不是暂停状态', {
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taskId,
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currentStatus: task.status
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});
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return { success: false, error: '只能恢复暂停的任务' };
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}
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// 重新开始下载执行
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try {
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logger.info('开始恢复任务执行', { taskId });
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await this.downloadExecutor.resumeTask(taskId);
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// 获取更新后的任务状态
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const updatedTask = this.taskManager.getTask(taskId);
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this.progressManager.notifyProgressUpdate(taskId, updatedTask);
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logger.info('任务恢复成功', {
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taskId,
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newStatus: updatedTask.status
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});
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} catch (error) {
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logger.error('恢复任务执行失败', {
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taskId,
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error: error.message,
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stack: error.stack
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});
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// 如果恢复失败，保持暂停状态
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return { success: false, error: `恢复任务失败: ${error.message}` };
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}
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return { success: true, data: this.taskManager.getTask(taskId) };
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}
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// 代理方法 - 历史记录管理
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async getDownloadHistory(offset = 0, limit = 50) {
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const result = this.historyManager.getDownloadHistory(offset, limit);
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return {
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success: true,
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data: result,
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};
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}
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/**
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* 清理历史记录
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*/
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async cleanupHistory(keepCount = 500) {
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try {
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const result = await this.historyManager.cleanupHistoryManually(keepCount);
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return {
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success: true,
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data: result
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};
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} catch (error) {
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return {
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success: false,
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error: error.message
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};
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}
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}
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/**
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* 清理已完成的任务
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*/
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async cleanupTasks(keepActive = true, keepCompleted = 100) {
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try {
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const result = await this.taskManager.cleanupTasksManually(keepActive, keepCompleted);
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return {
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success: true,
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data: { cleaned: result }
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};
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} catch (error) {
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return {
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success: false,
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error: error.message
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};
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}
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}
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/**
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* 获取系统统计信息
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*/
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async getSystemStats() {
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try {
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const taskStats = this.taskManager.getTaskStats();
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const historyStats = this.historyManager.getHistoryStats();
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return {
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tasks: taskStats,
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history: historyStats,
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activeConnections: this.progressManager.getTotalListenerCount()
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};
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} catch (error) {
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return {
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success: false,
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error: error.message
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};
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}
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}
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// 代理方法 - 文件管理
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async getDownloadedFiles() {
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try {
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const files = [];
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const downloadPath = await this.fileManager.getDownloadPath();
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const artists = await this.fileManager.listDirectory(downloadPath);
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for (const artist of artists) {
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const artistPath = path.join(downloadPath, artist);
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const artistStat = await this.fileManager.getFileInfo(artistPath);
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if (artistStat.exists && artistStat.isDirectory) {
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const artworks = await this.fileManager.listDirectory(artistPath);
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for (const artwork of artworks) {
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const artworkPath = path.join(artistPath, artwork);
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const artworkStat = await this.fileManager.getFileInfo(artworkPath);
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if (artworkStat.exists && artworkStat.isDirectory) {
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const artworkFiles = await this.fileManager.listDirectory(artworkPath);
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const imageFiles = artworkFiles.filter(file => /\.(jpg|jpeg|png|gif|webp)$/i.test(file));
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if (imageFiles.length > 0) {
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files.push({
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artist: artist,
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artwork: artwork,
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path: artworkPath,
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files: imageFiles,
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total_size: await this.fileManager.getDirectorySize(artworkPath),
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created_at: artworkStat.created,
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});
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}
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}
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}
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}
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}
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return files.sort((a, b) => new Date(b.created_at) - new Date(a.created_at));
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} catch (error) {
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logger.error('获取下载文件列表失败:', error);
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return [];
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}
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}
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async getDownloadedArtworkIds() {
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try {
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const downloadedIds = new Set();
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const downloadPath = await this.fileManager.getDownloadPath();
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// 扫描下载目录获取所有已下载的作品ID
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const artists = await this.fileManager.listDirectory(downloadPath);
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for (const artist of artists) {
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const artistPath = path.join(downloadPath, artist);
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const artistStat = await this.fileManager.getFileInfo(artistPath);
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if (artistStat.exists && artistStat.isDirectory) {
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const artworks = await this.fileManager.listDirectory(artistPath);
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for (const artwork of artworks) {
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// 检查是否是作品目录（包含数字ID）
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const artworkMatch = artwork.match(/^(\d+)_(.+)$/);
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if (artworkMatch) {
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const artworkId = artworkMatch[1];
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// 检查作品目录是否包含图片文件
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const artworkPath = path.join(artistPath, artwork);
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const artworkStat = await this.fileManager.getFileInfo(artworkPath);
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if (artworkStat.exists && artworkStat.isDirectory) {
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const files = await this.fileManager.listDirectory(artworkPath);
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const imageFiles = files.filter(file => /\.(jpg|jpeg|png|gif|webp)$/i.test(file));
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if (imageFiles.length > 0) {
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downloadedIds.add(parseInt(artworkId));
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}
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}
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}
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}
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}
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}
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return Array.from(downloadedIds);
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} catch (error) {
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logger.error('获取已下载作品ID列表失败:', error);
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return [];
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}
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}
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async isArtworkDownloaded(artworkId) {
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try {
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// 获取配置，决定使用哪种检测方式
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const cacheConfig = await this.cacheConfigManager.loadConfig();
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const useRegistryCheck = cacheConfig.download?.useRegistryCheck !== false; // 默认启用
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const fallbackToScan = cacheConfig.download?.fallbackToScan === true; // 默认不启用
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// 优先使用注册表检测（如果启用）
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if (useRegistryCheck) {
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try {
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const isDownloaded = await this.downloadRegistry.isArtworkDownloaded(artworkId);
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if (isDownloaded || !fallbackToScan) {
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return isDownloaded;
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}
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// 如果注册表显示未下载但启用了回退，继续使用扫盘检测
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} catch (error) {
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logger.warn('注册表检测失败，使用扫盘检测:', error.message);
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if (!fallbackToScan) {
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return false;
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}
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}
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}
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// 使用原有的扫盘检测逻辑
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return await this.isArtworkDownloadedByScan(artworkId);
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} catch (error) {
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logger.error('检查作品下载状态失败:', error);
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return false;
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}
|
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}
|
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|
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/**
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* 通过扫描文件系统检测作品是否已下载（原有逻辑）
|
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*/
|
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async isArtworkDownloadedByScan(artworkId) {
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try {
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const downloadPath = await this.fileManager.getDownloadPath();
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// 扫描所有作者目录
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const artistEntries = await this.fileManager.listDirectory(downloadPath);
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for (const artistEntry of artistEntries) {
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const artistPath = path.join(downloadPath, artistEntry);
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const artistStat = await this.fileManager.getFileInfo(artistPath);
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if (!artistStat.exists || !artistStat.isDirectory) continue;
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|
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// 扫描作者下的作品目录
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const artworkEntries = await this.fileManager.listDirectory(artistPath);
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for (const artworkEntry of artworkEntries) {
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// 检查是否是目标作品目录（包含数字ID）
|
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const artworkMatch = artworkEntry.match(/^(\d+)_(.+)$/);
|
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if (artworkMatch && artworkMatch[1] === artworkId.toString()) {
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const artworkPath = path.join(artistPath, artworkEntry);
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// 检查作品信息文件 - 这是最可靠的判断标准
|
|
const infoPath = path.join(artworkPath, 'artwork_info.json');
|
|
let artworkInfo;
|
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try {
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|
const infoContent = await fs.readFile(infoPath, 'utf8');
|
|
artworkInfo = JSON.parse(infoContent);
|
|
} catch (error) {
|
|
logger.info(`作品 ${artworkId} 缺少信息文件，认为未下载`);
|
|
return false;
|
|
}
|
|
|
|
// 检查是否有图片文件
|
|
const files = await this.fileManager.listDirectory(artworkPath);
|
|
const imageFiles = files.filter(file => /\.(jpg|jpeg|png|gif|webp)$/i.test(file) && file !== 'artwork_info.json');
|
|
|
|
if (imageFiles.length === 0) {
|
|
logger.info(`作品 ${artworkId} 有信息文件但没有图片文件，认为未下载`);
|
|
return false;
|
|
}
|
|
|
|
// 检查图片数量是否与artwork_info.json中记录的一致
|
|
const expectedImageCount = artworkInfo.page_count || 1;
|
|
if (imageFiles.length < expectedImageCount) {
|
|
logger.info(`作品 ${artworkId} 图片数量不匹配: 期望 ${expectedImageCount} 个，实际 ${imageFiles.length} 个`);
|
|
return false;
|
|
}
|
|
|
|
// 有信息文件、有图片文件且数量匹配，认为已下载
|
|
// logger.info(`作品 ${artworkId} 已完整下载，有信息文件和 ${imageFiles.length}/${expectedImageCount} 个图片文件`);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
} catch (error) {
|
|
logger.error('扫盘检查作品下载状态失败:', error);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 下载单个作品
|
|
*/
|
|
async downloadArtwork(artworkId, options = {}) {
|
|
const { size = 'original', quality = 'high', format = 'auto', skipExisting = true } = options;
|
|
|
|
try {
|
|
// 检查是否已下载
|
|
if (skipExisting && (await this.isArtworkDownloaded(artworkId))) {
|
|
return {
|
|
success: true,
|
|
data: {
|
|
task_id: null,
|
|
artwork_id: artworkId,
|
|
skipped: true,
|
|
message: '作品已存在且完整，跳过下载',
|
|
},
|
|
};
|
|
}
|
|
|
|
// 获取作品信息
|
|
const artworkResult = await this.artworkService.getArtworkDetail(artworkId);
|
|
if (!artworkResult.success) {
|
|
throw new Error(`获取作品信息失败: ${artworkResult.error}`);
|
|
}
|
|
|
|
const artwork = artworkResult.data;
|
|
|
|
// 确保作品信息完整
|
|
if (!artwork || !artwork.user || !artwork.title) {
|
|
throw new Error('作品信息不完整');
|
|
}
|
|
|
|
const artistName = this.fileManager.createSafeDirectoryName(artwork.user.name || 'Unknown Artist');
|
|
const artworkTitle = this.fileManager.createSafeDirectoryName(artwork.title || 'Untitled');
|
|
|
|
// 创建作品目录
|
|
const downloadPath = await this.fileManager.getDownloadPath();
|
|
const artistDir = path.join(downloadPath, artistName);
|
|
const artworkDirName = `${artworkId}_${artworkTitle}`;
|
|
const artworkDir = path.join(artistDir, artworkDirName);
|
|
|
|
// 如果是重新下载，先删除现有目录
|
|
if (!skipExisting && (await this.fileManager.directoryExists(artworkDir))) {
|
|
logger.info(`删除现有作品目录: ${artworkDir}`);
|
|
await this.fileManager.removeDirectory(artworkDir);
|
|
}
|
|
|
|
await this.fileManager.ensureDirectory(artworkDir);
|
|
|
|
// 获取图片URL
|
|
const imagesResult = await this.artworkService.getArtworkImages(artworkId, size);
|
|
if (!imagesResult.success) {
|
|
throw new Error(`获取图片URL失败: ${imagesResult.error}`);
|
|
}
|
|
|
|
const images = imagesResult.data.images;
|
|
|
|
// 创建任务记录
|
|
const task = this.taskManager.createTask('artwork', {
|
|
artwork_id: artworkId,
|
|
artist_name: artistName,
|
|
artwork_title: artworkTitle,
|
|
total_files: images.length,
|
|
completed_files: 0,
|
|
failed_files: 0,
|
|
});
|
|
|
|
await this.taskManager.saveTasks();
|
|
|
|
// 立即发送初始状态更新，让前端能立即看到进度条
|
|
this.progressManager.notifyProgressUpdate(task.id, task);
|
|
|
|
// 立即返回任务ID，异步执行下载
|
|
this.downloadExecutor.executeArtworkDownload(task, images, size, artworkDir, artwork);
|
|
|
|
return {
|
|
success: true,
|
|
data: {
|
|
task_id: task.id,
|
|
artwork_id: artworkId,
|
|
artist_name: artistName,
|
|
artwork_title: artworkTitle,
|
|
total_files: images.length,
|
|
status: 'downloading',
|
|
message: '下载任务已创建，正在后台执行',
|
|
},
|
|
};
|
|
} catch (error) {
|
|
logger.error('下载作品失败:', error);
|
|
return {
|
|
success: false,
|
|
error: error.message,
|
|
};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 批量下载作品
|
|
*/
|
|
async downloadMultipleArtworks(artworkIds, options = {}) {
|
|
try {
|
|
// 使用统一的批量下载方法
|
|
return await this.downloadBatchArtworks(artworkIds, {
|
|
...options,
|
|
taskType: 'batch',
|
|
});
|
|
} catch (error) {
|
|
logger.error('批量下载失败:', error);
|
|
return {
|
|
success: false,
|
|
error: error.message,
|
|
};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 内部方法：下载单个作品（用于批量下载，不创建新任务）
|
|
*/
|
|
async downloadSingleArtworkForBatch(artworkId, options = {}) {
|
|
const { size = 'original', quality = 'high', format = 'auto', skipExisting = true } = options;
|
|
|
|
try {
|
|
// 检查是否已下载
|
|
if (skipExisting && (await this.isArtworkDownloaded(artworkId))) {
|
|
return {
|
|
success: true,
|
|
skipped: true,
|
|
message: '作品已存在且完整，跳过下载',
|
|
};
|
|
}
|
|
|
|
// 获取作品信息
|
|
const artworkResult = await this.artworkService.getArtworkDetail(artworkId);
|
|
if (!artworkResult.success) {
|
|
throw new Error(`获取作品信息失败: ${artworkResult.error}`);
|
|
}
|
|
|
|
const artwork = artworkResult.data;
|
|
|
|
// 确保作品信息完整
|
|
if (!artwork || !artwork.user || !artwork.title) {
|
|
throw new Error('作品信息不完整');
|
|
}
|
|
|
|
const artistName = this.fileManager.createSafeDirectoryName(artwork.user.name || 'Unknown Artist');
|
|
const artworkTitle = this.fileManager.createSafeDirectoryName(artwork.title || 'Untitled');
|
|
|
|
// 创建作品目录
|
|
const downloadPath = await this.fileManager.getDownloadPath();
|
|
const artistDir = path.join(downloadPath, artistName);
|
|
const artworkDirName = `${artworkId}_${artworkTitle}`;
|
|
const artworkDir = path.join(artistDir, artworkDirName);
|
|
|
|
// 如果是重新下载，先删除现有目录
|
|
if (!skipExisting && (await this.fileManager.directoryExists(artworkDir))) {
|
|
logger.info(`删除现有作品目录: ${artworkDir}`);
|
|
await this.fileManager.removeDirectory(artworkDir);
|
|
}
|
|
|
|
await this.fileManager.ensureDirectory(artworkDir);
|
|
|
|
// 获取图片URL
|
|
const imagesResult = await this.artworkService.getArtworkImages(artworkId, size);
|
|
if (!imagesResult.success) {
|
|
throw new Error(`获取图片URL失败: ${imagesResult.error}`);
|
|
}
|
|
|
|
const images = imagesResult.data.images;
|
|
|
|
// 直接下载，不创建新任务
|
|
const results = [];
|
|
for (let index = 0; index < images.length; index++) {
|
|
// 从图片对象中获取指定尺寸的URL
|
|
const imageObj = images[index];
|
|
let imageUrl;
|
|
|
|
// 根据size参数选择对应的URL
|
|
switch (size) {
|
|
case 'original':
|
|
imageUrl = imageObj.original;
|
|
break;
|
|
case 'large':
|
|
imageUrl = imageObj.large;
|
|
break;
|
|
case 'medium':
|
|
imageUrl = imageObj.medium;
|
|
break;
|
|
case 'square_medium':
|
|
imageUrl = imageObj.square_medium;
|
|
break;
|
|
default:
|
|
imageUrl = imageObj.original || imageObj.large || imageObj.medium;
|
|
}
|
|
|
|
// 确保imageUrl是字符串
|
|
if (typeof imageUrl !== 'string') {
|
|
logger.error(`图片URL不是字符串:`, imageUrl);
|
|
results.push({ success: false, error: '图片URL格式错误' });
|
|
continue;
|
|
}
|
|
|
|
const fileName = `image_${index + 1}.${this.getFileExtension(imageUrl)}`;
|
|
const filePath = path.join(artworkDir, fileName);
|
|
|
|
// 检查文件是否已存在
|
|
if (await this.fileManager.fileExists(filePath)) {
|
|
results.push({ success: true, file: fileName, skipped: true });
|
|
continue;
|
|
}
|
|
|
|
try {
|
|
// 确保目录存在
|
|
await this.fileManager.ensureDirectory(path.dirname(filePath));
|
|
await this.fileManager.downloadFile(imageUrl, filePath);
|
|
results.push({ success: true, file: fileName });
|
|
} catch (error) {
|
|
logger.error(`下载图片失败 ${index + 1}: ${error.message}`);
|
|
results.push({ success: false, error: error.message });
|
|
}
|
|
}
|
|
|
|
// 保存作品信息
|
|
const infoPath = path.join(artworkDir, 'artwork_info.json');
|
|
await fs.writeJson(infoPath, artwork, { spaces: 2 });
|
|
|
|
// 检查下载结果
|
|
const failedCount = results.filter(r => !r.success).length;
|
|
const successCount = results.filter(r => r.success && !r.skipped).length;
|
|
|
|
return {
|
|
success: failedCount === 0,
|
|
artwork_id: artworkId,
|
|
artist_name: artistName,
|
|
artwork_title: artworkTitle,
|
|
total_files: images.length,
|
|
completed_files: successCount,
|
|
failed_files: failedCount,
|
|
results: results,
|
|
};
|
|
} catch (error) {
|
|
logger.error(`下载作品 ${artworkId} 失败:`, error);
|
|
return {
|
|
success: false,
|
|
error: error.message,
|
|
artwork_id: artworkId,
|
|
};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 获取文件扩展名
|
|
*/
|
|
getFileExtension(url) {
|
|
if (typeof url !== 'string') {
|
|
logger.warn('URL不是字符串，使用默认扩展名:', url);
|
|
return 'jpg';
|
|
}
|
|
|
|
const match = url.match(/\.([a-zA-Z0-9]+)(?:\?|$)/);
|
|
return match ? match[1] : 'jpg';
|
|
}
|
|
|
|
/**
|
|
* 下载批量作品 - 统一的批量下载方法
|
|
* @param {Array} items - 要下载的项目列表（可以是作品ID数组或作品对象数组）
|
|
* @param {Object} options - 下载选项
|
|
*/
|
|
async downloadBatchArtworks(items, options = {}) {
|
|
const { size = 'original', quality = 'high', format = 'auto', skipExisting = true, maxConcurrent = 3, taskType = 'batch' } = options;
|
|
|
|
try {
|
|
// 生成任务描述
|
|
let taskDescription = '';
|
|
let taskTitle = '';
|
|
|
|
if (taskType === 'ranking') {
|
|
const modeMap = {
|
|
'day': '日榜',
|
|
'week': '周榜',
|
|
'month': '月榜',
|
|
'rookie': '新人榜'
|
|
};
|
|
const typeMap = {
|
|
'art': '插画',
|
|
'manga': '漫画',
|
|
'novel': '小说'
|
|
};
|
|
const modeText = modeMap[options.mode] || options.mode;
|
|
const typeText = typeMap[options.type] || options.type;
|
|
taskDescription = `${modeText}${typeText}排行榜`;
|
|
taskTitle = `排行榜下载 - ${taskDescription}`;
|
|
} else if (taskType === 'artist') {
|
|
const artistName = options.artist_name || `作者ID: ${options.artist_id}`;
|
|
taskDescription = `作者作品 - ${artistName}`;
|
|
taskTitle = `作者作品下载 - ${artistName}`;
|
|
} else {
|
|
taskDescription = '批量下载';
|
|
taskTitle = '批量下载';
|
|
}
|
|
|
|
// 创建任务记录
|
|
const task = this.taskManager.createTask(taskType, {
|
|
total_files: 0,
|
|
completed_files: 0,
|
|
failed_files: 0,
|
|
skipped: 0,
|
|
results: [],
|
|
task_description: taskDescription,
|
|
task_title: taskTitle,
|
|
// 保留原有的任务特定字段
|
|
...(options.artist_id && { artist_id: options.artist_id }),
|
|
...(options.artist_name && { artist_name: options.artist_name }),
|
|
...(options.mode && { mode: options.mode }),
|
|
...(options.type && { type: options.type }),
|
|
});
|
|
|
|
await this.taskManager.saveTasks();
|
|
|
|
// 获取已下载的作品ID
|
|
const downloadedIds = skipExisting ? await this.getDownloadedArtworkIds() : [];
|
|
const downloadedSet = new Set(downloadedIds);
|
|
|
|
// 过滤已下载的作品
|
|
let newItems;
|
|
if (skipExisting) {
|
|
newItems = items.filter(item => {
|
|
const artworkId = typeof item === 'object' ? item.id : item;
|
|
return !downloadedSet.has(artworkId);
|
|
});
|
|
} else {
|
|
newItems = items;
|
|
}
|
|
|
|
const skippedCount = items.length - newItems.length;
|
|
|
|
await this.taskManager.updateTask(task.id, {
|
|
skipped: skippedCount,
|
|
total_files: newItems.length,
|
|
});
|
|
|
|
// 如果没有需要下载的作品，直接返回
|
|
if (newItems.length === 0) {
|
|
await this.taskManager.updateTask(task.id, {
|
|
status: 'completed',
|
|
end_time: new Date(),
|
|
});
|
|
|
|
return {
|
|
success: true,
|
|
data: {
|
|
task_id: task.id,
|
|
total_artworks: items.length,
|
|
completed_artworks: 0,
|
|
failed_artworks: 0,
|
|
skipped_artworks: skippedCount,
|
|
message: '所有作品都已下载完成',
|
|
},
|
|
};
|
|
}
|
|
|
|
// 异步执行批量下载
|
|
this.downloadExecutor.executeBatchDownload(task, newItems, options);
|
|
|
|
return {
|
|
success: true,
|
|
data: {
|
|
task_id: task.id,
|
|
total_artworks: task.total_files,
|
|
completed_artworks: task.completed_files,
|
|
failed_artworks: task.failed_files,
|
|
message: '批量下载任务已创建，正在后台执行',
|
|
},
|
|
};
|
|
} catch (error) {
|
|
logger.error('批量下载失败:', error);
|
|
return {
|
|
success: false,
|
|
error: error.message,
|
|
};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 下载作者作品
|
|
*/
|
|
async downloadArtistArtworks(artistId, options = {}) {
|
|
const { type = 'art', limit = 50, pageSize = 30 } = options;
|
|
|
|
try {
|
|
// 先获取作者信息
|
|
let artistName = '未知作者';
|
|
try {
|
|
const artistResult = await this.artistService.getArtistInfo(artistId);
|
|
if (artistResult.success && artistResult.data) {
|
|
artistName = artistResult.data.name || `作者 ${artistId}`;
|
|
}
|
|
} catch (err) {
|
|
logger.warn(`获取作者 ${artistId} 信息失败:`, err.message);
|
|
}
|
|
|
|
// 分页获取作者作品列表
|
|
let allArtworks = [];
|
|
let offset = 0;
|
|
let hasMore = true;
|
|
|
|
while (hasMore && allArtworks.length < limit) {
|
|
const artworksResult = await this.artistService.getArtistArtworks(artistId, {
|
|
type,
|
|
offset: offset,
|
|
});
|
|
|
|
if (!artworksResult.success) {
|
|
throw new Error(`获取作者作品失败: ${artworksResult.error}`);
|
|
}
|
|
|
|
const artworks = artworksResult.data.artworks;
|
|
if (artworks.length === 0) {
|
|
hasMore = false;
|
|
} else {
|
|
// 确保不超过指定的 limit
|
|
const remainingSlots = limit - allArtworks.length;
|
|
const artworksToAdd = artworks.slice(0, remainingSlots);
|
|
|
|
allArtworks.push(...artworksToAdd);
|
|
offset += artworks.length;
|
|
|
|
// 基于 next_url 判断是否还有更多页面
|
|
hasMore = !!artworksResult.data.next_url && allArtworks.length < limit;
|
|
|
|
// 添加延迟避免请求过于频繁
|
|
await new Promise(resolve => setTimeout(resolve, 500));
|
|
}
|
|
}
|
|
|
|
// 使用统一的批量下载方法
|
|
return await this.downloadBatchArtworks(allArtworks, {
|
|
...options,
|
|
taskType: 'artist',
|
|
artist_id: artistId,
|
|
artist_name: artistName,
|
|
});
|
|
} catch (error) {
|
|
logger.error('作者作品下载失败:', error);
|
|
return {
|
|
success: false,
|
|
error: error.message,
|
|
};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 下载排行榜作品
|
|
*/
|
|
async downloadRankingArtworks(options = {}) {
|
|
const { mode = 'day', type = 'art', limit = 50, pageSize = 30 } = options;
|
|
|
|
try {
|
|
// 分页获取排行榜作品列表
|
|
let allArtworks = [];
|
|
let offset = 0;
|
|
let hasMore = true;
|
|
|
|
while (hasMore && allArtworks.length < limit) {
|
|
const remainingLimit = limit - allArtworks.length;
|
|
const requestLimit = Math.min(pageSize, remainingLimit);
|
|
|
|
const rankingResult = await this.getRankingArtworks(mode, type, {
|
|
offset: offset,
|
|
limit: requestLimit,
|
|
});
|
|
|
|
if (!rankingResult.success) {
|
|
throw new Error(`获取排行榜作品失败: ${rankingResult.error}`);
|
|
}
|
|
|
|
const artworks = rankingResult.data.artworks;
|
|
if (artworks.length === 0) {
|
|
hasMore = false;
|
|
} else {
|
|
// 确保不超过指定的 limit
|
|
const remainingSlots = limit - allArtworks.length;
|
|
const artworksToAdd = artworks.slice(0, remainingSlots);
|
|
|
|
allArtworks.push(...artworksToAdd);
|
|
offset += artworks.length;
|
|
|
|
// 基于 next_url 判断是否还有更多页面
|
|
hasMore = !!rankingResult.data.next_url && allArtworks.length < limit;
|
|
|
|
// 添加延迟避免请求过于频繁
|
|
await new Promise(resolve => setTimeout(resolve, 500));
|
|
}
|
|
}
|
|
|
|
// 使用统一的批量下载方法
|
|
return await this.downloadBatchArtworks(allArtworks, {
|
|
...options,
|
|
taskType: 'ranking',
|
|
mode: mode,
|
|
type: type,
|
|
});
|
|
} catch (error) {
|
|
logger.error('排行榜作品下载失败:', error);
|
|
return {
|
|
success: false,
|
|
error: error.message,
|
|
};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 获取排行榜作品列表
|
|
*/
|
|
async getRankingArtworks(mode, type, options = {}) {
|
|
const { offset = 0, limit = 30 } = options;
|
|
|
|
try {
|
|
// 使用作品服务来获取排行榜数据
|
|
const artworkService = new (require('./artwork'))(this.auth);
|
|
|
|
const result = await artworkService.getRankingArtworks({
|
|
mode,
|
|
content: type,
|
|
offset,
|
|
limit,
|
|
});
|
|
|
|
// 检查 ArtworkService 返回的结果
|
|
if (!result.success) {
|
|
throw new Error(result.error || '获取排行榜数据失败');
|
|
}
|
|
|
|
// 确保数据结构正确
|
|
const artworks = result.data?.artworks || [];
|
|
const nextUrl = result.data?.next_url || null;
|
|
|
|
return {
|
|
success: true,
|
|
data: {
|
|
artworks: artworks,
|
|
next_url: nextUrl,
|
|
},
|
|
};
|
|
} catch (error) {
|
|
logger.error('获取排行榜失败:', error);
|
|
return {
|
|
success: false,
|
|
error: error.message,
|
|
};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 删除已下载的文件
|
|
* @param {string} artist - 作者名称
|
|
* @param {string} artwork - 作品目录名称
|
|
* @returns {Object} 删除结果
|
|
*/
|
|
async deleteDownloadedFiles(artist, artwork) {
|
|
|
|
try {
|
|
const downloadPath = await this.fileManager.getDownloadPath();
|
|
const artworkPath = path.join(downloadPath, artist, artwork);
|
|
|
|
// 检查作品目录是否存在
|
|
const artworkStat = await this.fileManager.getFileInfo(artworkPath);
|
|
if (!artworkStat.exists) {
|
|
return {
|
|
success: false,
|
|
error: '作品目录不存在'
|
|
};
|
|
}
|
|
|
|
// 从作品目录名称中提取作品ID
|
|
const artworkMatch = artwork.match(/^(\d+)_(.+)$/);
|
|
if (!artworkMatch) {
|
|
return {
|
|
success: false,
|
|
error: '无效的作品目录格式'
|
|
};
|
|
}
|
|
|
|
const artworkId = parseInt(artworkMatch[1]);
|
|
|
|
// 删除作品目录
|
|
await this.fileManager.removeDirectory(artworkPath);
|
|
|
|
// 从注册表中移除作品记录
|
|
try {
|
|
await this.downloadRegistry.removeArtwork(artist, artworkId);
|
|
logger.debug('已从下载注册表中移除作品', {
|
|
artistName: artist,
|
|
artworkId: artworkId
|
|
});
|
|
} catch (error) {
|
|
logger.warn('从下载注册表中移除作品失败:', error.message);
|
|
}
|
|
|
|
// 检查作者目录是否为空，如果为空则删除
|
|
const artistPath = path.join(downloadPath, artist);
|
|
try {
|
|
const artistEntries = await this.fileManager.listDirectory(artistPath);
|
|
const hasArtworks = artistEntries.some(entry => entry.match(/^\d+_/));
|
|
|
|
if (!hasArtworks) {
|
|
await this.fileManager.removeDirectory(artistPath);
|
|
logger.debug('已删除空的作者目录', { artistName: artist });
|
|
}
|
|
} catch (error) {
|
|
logger.warn(`检查作者目录失败: ${error.message}`);
|
|
}
|
|
|
|
return {
|
|
success: true,
|
|
message: '作品删除成功'
|
|
};
|
|
} catch (error) {
|
|
logger.error('删除作品失败:', error);
|
|
return {
|
|
success: false,
|
|
error: error.message
|
|
};
|
|
}
|
|
}
|
|
}
|
|
|
|
module.exports = DownloadService;
|