414 lines
13 KiB
JavaScript
414 lines
13 KiB
JavaScript
// ========== 写死的选项数据 ==========
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const ALL_CAMPS = [];
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for (let i = 13; i <= 26; i++) {
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ALL_CAMPS.push(`训练营${i}期`);
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}
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const ALL_CLASSES = [];
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for (let i = 1; i <= 25; i++) {
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ALL_CLASSES.push(`${i}班`);
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}
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const ALLOWED_EXTENSIONS = ['jpg', 'jpeg', 'png', 'gif', 'webp'];
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const MAX_FILE_SIZE_MB = 20;
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const MAX_FILES_COUNT = 100;
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// ========== 状态管理 ==========
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let state = {
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selectedCamp: '',
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selectedClass: '',
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selectedFiles: [], // { file, id, previewUrl }
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uploadResults: [], // { file, id, status, filename, reason, previewUrl }
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isUploading: false,
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};
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// ========== DOM 元素 ==========
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const $ = (sel) => document.querySelector(sel);
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const campSelect = $('#camp-select');
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const classSelect = $('#class-select');
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const fileInput = $('#file-input');
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const uploadSection = $('.upload-section');
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const selectArea = $('#select-area');
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const previewSection = $('#preview-section');
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const previewGrid = $('#preview-grid');
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const selectedCount = $('#selected-count');
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const btnUpload = $('#btn-upload');
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const btnClearAll = $('#btn-clear-all');
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const progressSection = $('#progress-section');
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const progressText = $('#progress-text');
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const progressPercent = $('#progress-percent');
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const progressFill = $('#progress-fill');
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const fileProgressList = $('#file-progress-list');
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const resultSection = $('#result-section');
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const resultSummary = $('#result-summary');
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const resultGrid = $('#result-grid');
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const btnRetry = $('#btn-retry');
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const btnNewUpload = $('#btn-new-upload');
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// ========== 初始化 ==========
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function init() {
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loadFolders();
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bindEvents();
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}
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// ========== 文件夹加载（前端写死选项） ==========
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function loadFolders() {
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campSelect.innerHTML = '<option value="">-- 请选择训练营 --</option>';
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ALL_CAMPS.forEach(camp => {
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const opt = document.createElement('option');
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opt.value = camp;
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opt.textContent = camp;
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campSelect.appendChild(opt);
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});
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}
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function onCampChange() {
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const campName = campSelect.value;
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state.selectedCamp = campName;
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classSelect.innerHTML = '';
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classSelect.disabled = true;
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state.selectedClass = '';
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if (!campName) {
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classSelect.innerHTML = '<option value="">-- 请先选择训练营 --</option>';
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return;
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}
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classSelect.disabled = false;
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classSelect.innerHTML = '<option value="">-- 请选择班级 --</option>';
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ALL_CLASSES.forEach(cls => {
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const opt = document.createElement('option');
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opt.value = cls;
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opt.textContent = cls;
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classSelect.appendChild(opt);
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});
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}
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function onClassChange() {
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state.selectedClass = classSelect.value;
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}
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// ========== 文件选择 ==========
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function onFileSelect(e) {
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const files = Array.from(e.target.files);
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if (!files.length) return;
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const remaining = MAX_FILES_COUNT - state.selectedFiles.length;
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if (remaining <= 0) {
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alert(`最多只能选择 ${MAX_FILES_COUNT} 张图片`);
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fileInput.value = '';
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return;
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}
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const filesToAdd = files.slice(0, remaining);
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let rejected = 0;
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filesToAdd.forEach(file => {
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if (file.size > MAX_FILE_SIZE_MB * 1024 * 1024) {
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rejected++;
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return;
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}
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const ext = file.name.split('.').pop().toLowerCase();
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if (!ALLOWED_EXTENSIONS.includes(ext)) {
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rejected++;
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return;
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}
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const id = Date.now() + '_' + Math.random().toString(36).substr(2, 6);
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const previewUrl = URL.createObjectURL(file);
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state.selectedFiles.push({ file, id, previewUrl });
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});
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if (rejected > 0) {
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alert(`已跳过 ${rejected} 个文件（格式不支持或超过 20MB）`);
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}
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fileInput.value = '';
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renderPreview();
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}
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function removeFile(id) {
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const idx = state.selectedFiles.findIndex(f => f.id === id);
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if (idx !== -1) {
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URL.revokeObjectURL(state.selectedFiles[idx].previewUrl);
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state.selectedFiles.splice(idx, 1);
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}
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renderPreview();
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}
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function clearAllFiles() {
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state.selectedFiles.forEach(f => URL.revokeObjectURL(f.previewUrl));
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state.selectedFiles = [];
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renderPreview();
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}
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function renderPreview() {
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const count = state.selectedFiles.length;
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if (count === 0) {
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previewSection.style.display = 'none';
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selectArea.style.display = 'block';
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return;
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}
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selectArea.style.display = 'none';
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previewSection.style.display = 'block';
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selectedCount.textContent = count;
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btnUpload.disabled = !state.selectedCamp || !state.selectedClass || state.isUploading;
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previewGrid.innerHTML = '';
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state.selectedFiles.forEach(item => {
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const div = document.createElement('div');
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div.className = 'preview-item';
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div.innerHTML = `
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<img src="${item.previewUrl}" alt="${item.file.name}">
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<button class="remove-btn" onclick="removeFile('${item.id}')">×</button>
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<div class="file-name">${item.file.name}</div>
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`;
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previewGrid.appendChild(div);
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});
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}
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// ========== 上传逻辑（真实API） ==========
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function uploadFile(file, campName, className, onProgress) {
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return new Promise((resolve) => {
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const formData = new FormData();
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formData.append('folder', campName);
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formData.append('class', className);
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formData.append('files', file);
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const xhr = new XMLHttpRequest();
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xhr.open('POST', '/api/upload');
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xhr.upload.onprogress = (e) => {
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if (e.lengthComputable) {
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onProgress(Math.round((e.loaded / e.total) * 100));
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}
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};
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xhr.onload = () => {
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try {
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const data = JSON.parse(xhr.responseText);
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if (xhr.status === 200 && data.uploaded && data.uploaded.length > 0) {
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resolve({ type: 'success', filename: data.uploaded[0].filename });
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} else if (data.failed && data.failed.length > 0) {
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resolve({ type: 'failed', reason: data.failed[0].reason });
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} else {
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resolve({ type: 'failed', reason: data.error || '上传失败' });
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}
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} catch (e) {
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resolve({ type: 'failed', reason: '服务器响应异常' });
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}
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};
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xhr.onerror = () => {
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resolve({ type: 'failed', reason: '网络错误' });
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};
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xhr.ontimeout = () => {
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resolve({ type: 'failed', reason: '请求超时' });
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};
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xhr.timeout = 120000; // 2分钟超时
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xhr.send(formData);
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});
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}
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async function startUpload() {
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if (!state.selectedCamp || !state.selectedClass) {
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alert('请先选择训练营和班级');
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return;
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}
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if (state.selectedFiles.length === 0) {
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alert('请先选择图片');
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return;
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}
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state.isUploading = true;
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btnUpload.disabled = true;
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btnUpload.textContent = '上传中...';
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btnUpload.classList.add('uploading');
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// 切换到进度视图
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previewSection.style.display = 'none';
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resultSection.style.display = 'none';
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progressSection.style.display = 'block';
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// 初始化进度列表
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fileProgressList.innerHTML = '';
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state.selectedFiles.forEach(item => {
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const div = document.createElement('div');
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div.className = 'file-progress-item';
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div.id = `progress-${item.id}`;
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div.innerHTML = `
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<span class="status-icon">⏳</span>
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<div class="file-info">
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<div class="name">${item.file.name}</div>
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<div class="detail">等待上传...</div>
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</div>
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<div class="mini-progress"><div class="mini-fill" style="width:0%"></div></div>
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`;
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fileProgressList.appendChild(div);
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});
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// 逐张上传
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let completed = 0;
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const total = state.selectedFiles.length;
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state.uploadResults = [];
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for (const item of state.selectedFiles) {
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const el = $(`#progress-${item.id}`);
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const icon = el.querySelector('.status-icon');
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const detail = el.querySelector('.detail');
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const miniFill = el.querySelector('.mini-fill');
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// 上传中
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icon.textContent = '📤';
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detail.textContent = '上传中...';
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// 调用真实API
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const result = await uploadFile(item.file, state.selectedCamp, state.selectedClass, (percent) => {
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miniFill.style.width = `${percent}%`;
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});
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if (result.type === 'success') {
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icon.textContent = '✅';
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detail.textContent = result.filename;
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el.classList.add('status-success');
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miniFill.style.width = '100%';
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miniFill.style.background = '#52c41a';
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state.uploadResults.push({
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file: item.file,
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id: item.id,
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previewUrl: item.previewUrl,
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status: 'success',
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filename: result.filename,
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});
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} else if (result.type === 'failed') {
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icon.textContent = '❌';
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detail.textContent = `上传失败：${result.reason}`;
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el.classList.add('status-failed');
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miniFill.style.width = '100%';
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miniFill.style.background = '#ff4d4f';
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state.uploadResults.push({
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file: item.file,
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id: item.id,
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previewUrl: item.previewUrl,
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status: 'failed',
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filename: item.file.name,
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reason: result.reason,
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});
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}
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completed++;
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const percent = Math.round((completed / total) * 100);
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progressText.textContent = `上传中... ${completed} / ${total}`;
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progressPercent.textContent = `${percent}%`;
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progressFill.style.width = `${percent}%`;
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}
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// 上传完成
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state.isUploading = false;
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btnUpload.textContent = '开始上传';
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btnUpload.classList.remove('uploading');
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setTimeout(() => {
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progressSection.style.display = 'none';
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uploadSection.style.display = 'none';
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showResults();
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}, 500);
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}
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// ========== 结果展示 ==========
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function showResults() {
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resultSection.style.display = 'block';
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const successList = state.uploadResults.filter(r => r.status === 'success');
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const failedList = state.uploadResults.filter(r => r.status === 'failed');
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let summaryHtml = `共上传 <strong>${state.uploadResults.length}</strong> 张图片，`;
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summaryHtml += `<span class="success-count">成功 ${successList.length} 张</span>`;
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if (failedList.length > 0) {
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summaryHtml += `，<span class="fail-count">失败 ${failedList.length} 张</span>`;
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}
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resultSummary.innerHTML = summaryHtml;
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btnRetry.style.display = failedList.length > 0 ? 'inline-block' : 'none';
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resultGrid.innerHTML = '';
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state.uploadResults.forEach(item => {
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const div = document.createElement('div');
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div.className = `result-item ${item.status}`;
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div.innerHTML = `
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<img src="${item.previewUrl}" alt="${item.filename}">
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<div class="result-name">${item.status === 'success' ? item.filename : item.filename}</div>
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<span class="result-status">${item.status === 'success' ? '✅' : '❌'}</span>
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`;
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resultGrid.appendChild(div);
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});
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}
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function retryFailed() {
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const failedItems = state.uploadResults.filter(r => r.status === 'failed');
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state.selectedFiles = failedItems.map(item => ({
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file: item.file,
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id: item.id,
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previewUrl: item.previewUrl,
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}));
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state.uploadResults = [];
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resultSection.style.display = 'none';
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progressSection.style.display = 'none';
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uploadSection.style.display = 'block';
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renderPreview();
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}
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function newUpload() {
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state.selectedFiles.forEach(f => URL.revokeObjectURL(f.previewUrl));
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state.selectedFiles = [];
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state.uploadResults = [];
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state.isUploading = false;
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resultSection.style.display = 'none';
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progressSection.style.display = 'none';
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uploadSection.style.display = 'block';
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previewSection.style.display = 'none';
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selectArea.style.display = 'block';
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btnUpload.disabled = true;
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btnUpload.textContent = '开始上传';
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}
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// ========== 事件绑定 ==========
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function bindEvents() {
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campSelect.addEventListener('change', onCampChange);
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classSelect.addEventListener('change', onClassChange);
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fileInput.addEventListener('change', onFileSelect);
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btnUpload.addEventListener('click', startUpload);
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btnClearAll.addEventListener('click', clearAllFiles);
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btnRetry.addEventListener('click', retryFailed);
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btnNewUpload.addEventListener('click', newUpload);
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campSelect.addEventListener('change', () => {
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if (state.selectedFiles.length > 0) renderPreview();
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});
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classSelect.addEventListener('change', () => {
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if (state.selectedFiles.length > 0) renderPreview();
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});
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}
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// ========== 启动 ==========
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document.addEventListener('DOMContentLoaded', init);
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