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import express from 'express';
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import githubService from '../services/githubService.js';
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import memoryStorageService from '../services/memoryStorageService.js';
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const router = express.Router();
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const getStorageService = () => {
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if (!process.env.GITHUB_TOKEN) {
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return memoryStorageService;
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}
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return githubService;
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};
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const generateSlideHTML = (pptData, slideIndex, title) => {
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const slide = pptData.slides[slideIndex];
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const theme = pptData.theme || {};
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const renderElements = (elements) => {
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if (!elements || elements.length === 0) return '';
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return elements.map(element => {
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const style = `
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position: absolute;
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left: ${element.left}px;
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top: ${element.top}px;
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width: ${element.width}px;
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height: ${element.height}px;
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transform: rotate(${element.rotate || 0}deg);
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z-index: ${element.zIndex || 1};
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`;
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switch (element.type) {
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case 'text':
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return `
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<div style="${style}
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font-size: ${element.fontSize || 14}px;
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font-family: ${element.fontName || 'Arial'};
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color: ${element.defaultColor || '#000'};
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font-weight: ${element.bold ? 'bold' : 'normal'};
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font-style: ${element.italic ? 'italic' : 'normal'};
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text-decoration: ${element.underline ? 'underline' : 'none'};
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text-align: ${element.align || 'left'};
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line-height: ${element.lineHeight || 1.2};
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padding: 10px;
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word-wrap: break-word;
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overflow: hidden;
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">
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${element.content || ''}
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</div>
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`;
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case 'image':
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return `
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<div style="${style}">
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<img src="${element.src}" alt="" style="width: 100%; height: 100%; object-fit: ${element.objectFit || 'contain'};" />
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</div>
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`;
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case 'shape':
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const shapeStyle = element.fill ? `background-color: ${element.fill};` : '';
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const borderStyle = element.outline ? `border: ${element.outline.width || 1}px ${element.outline.style || 'solid'} ${element.outline.color || '#000'};` : '';
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return `
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<div style="${style} ${shapeStyle} ${borderStyle}"></div>
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`;
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default:
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return `<div style="${style}"></div>`;
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}
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}).join('');
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};
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return `
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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>${title} - 第${slideIndex + 1}页</title>
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<style>
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* {
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margin: 0;
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padding: 0;
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box-sizing: border-box;
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}
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body {
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font-family: 'Microsoft YaHei', Arial, sans-serif;
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background-color: #f5f5f5;
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display: flex;
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justify-content: center;
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align-items: center;
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min-height: 100vh;
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padding: 0;
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}
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.slide-container {
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width: 900px;
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height: 506px;
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background-color: ${slide.background?.color || theme.backgroundColor || '#ffffff'};
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position: relative;
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border-radius: 8px;
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box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
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overflow: hidden;
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}
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${slide.background?.type === 'image' ? `
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.slide-container::before {
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content: '';
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position: absolute;
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top: 0;
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left: 0;
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right: 0;
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bottom: 0;
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background-image: url('${slide.background.image}');
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background-size: ${slide.background.imageSize || 'cover'};
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background-position: center;
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background-repeat: no-repeat;
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z-index: 0;
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}
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` : ''}
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</style>
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</head>
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<body>
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<div class="slide-container">
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${renderElements(slide.elements)}
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</div>
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</body>
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</html>
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`;
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};
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router.get('/view/:userId/:pptId/:slideIndex?', async (req, res, next) => {
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try {
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const { userId, pptId, slideIndex = 0 } = req.params;
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const querySlideIndex = req.query.slide ? parseInt(req.query.slide) : parseInt(slideIndex);
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const fileName = `${pptId}.json`;
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const storageService = getStorageService();
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let pptData = null;
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if (storageService === githubService && storageService.repositories) {
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for (let i = 0; i < storageService.repositories.length; i++) {
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try {
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const result = await storageService.getFile(userId, fileName, i);
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if (result) {
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pptData = result.content;
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break;
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}
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} catch (error) {
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continue;
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}
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}
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} else {
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const result = await storageService.getFile(userId, fileName);
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if (result) {
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pptData = result.content;
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}
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}
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if (!pptData) {
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return res.status(404).send(`
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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>PPT未找到</title>
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<style>
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body { font-family: Arial, sans-serif; text-align: center; padding: 50px; }
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.error { color: #e74c3c; font-size: 18px; }
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</style>
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</head>
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<body>
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<div class="error">
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<h2>PPT未找到</h2>
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<p>请检查链接是否正确</p>
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</div>
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</body>
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</html>
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`);
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}
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const slideIdx = querySlideIndex;
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if (slideIdx >= pptData.slides.length || slideIdx < 0) {
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return res.status(404).send(`
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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>幻灯片未找到</title>
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<style>
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body { font-family: Arial, sans-serif; text-align: center; padding: 50px; }
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.error { color: #e74c3c; font-size: 18px; }
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</style>
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</head>
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<body>
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<div class="error">
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<h2>幻灯片未找到</h2>
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<p>请检查幻灯片索引是否正确</p>
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</div>
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</body>
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</html>
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`);
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}
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const htmlContent = generateSlideHTML(pptData, slideIdx, pptData.title);
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res.setHeader('Content-Type', 'text/html; charset=utf-8');
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res.send(htmlContent);
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} catch (error) {
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next(error);
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}
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});
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router.get('/api/view/:userId/:pptId/:slideIndex?', async (req, res, next) => {
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try {
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const { userId, pptId, slideIndex = 0 } = req.params;
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const fileName = `${pptId}.json`;
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const storageService = getStorageService();
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let pptData = null;
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if (storageService === githubService && storageService.repositories) {
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for (let i = 0; i < storageService.repositories.length; i++) {
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try {
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const result = await storageService.getFile(userId, fileName, i);
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if (result) {
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pptData = result.content;
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break;
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}
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} catch (error) {
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continue;
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}
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}
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} else {
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const result = await storageService.getFile(userId, fileName);
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if (result) {
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pptData = result.content;
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}
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}
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if (!pptData) {
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return res.status(404).json({ error: 'PPT not found' });
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}
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const slideIdx = parseInt(slideIndex);
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if (slideIdx >= pptData.slides.length || slideIdx < 0) {
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return res.status(404).json({ error: 'Slide not found' });
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}
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res.json({
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id: pptData.id,
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title: pptData.title,
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theme: pptData.theme,
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currentSlide: pptData.slides[slideIdx],
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slideIndex: slideIdx,
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totalSlides: pptData.slides.length,
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isPublicView: true
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});
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} catch (error) {
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next(error);
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}
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});
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router.get('/ppt/:userId/:pptId', async (req, res, next) => {
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try {
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const { userId, pptId } = req.params;
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const fileName = `${pptId}.json`;
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const storageService = getStorageService();
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let pptData = null;
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if (storageService === githubService && storageService.repositories) {
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for (let i = 0; i < storageService.repositories.length; i++) {
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try {
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const result = await storageService.getFile(userId, fileName, i);
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if (result) {
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pptData = result.content;
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break;
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}
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} catch (error) {
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continue;
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}
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}
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} else {
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const result = await storageService.getFile(userId, fileName);
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if (result) {
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pptData = result.content;
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}
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}
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if (!pptData) {
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return res.status(404).json({ error: 'PPT not found' });
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}
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res.json({
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...pptData,
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isPublicView: true,
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readOnly: true
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});
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} catch (error) {
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next(error);
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}
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});
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router.post('/generate-share-link', async (req, res, next) => {
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try {
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const { userId, pptId, slideIndex = 0 } = req.body;
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if (!userId || !pptId) {
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return res.status(400).json({ error: 'User ID and PPT ID are required' });
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}
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const fileName = `${pptId}.json`;
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const storageService = getStorageService();
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let pptExists = false;
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if (storageService === githubService && storageService.repositories) {
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for (let i = 0; i < storageService.repositories.length; i++) {
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try {
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const result = await storageService.getFile(userId, fileName, i);
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if (result) {
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pptExists = true;
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break;
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}
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} catch (error) {
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continue;
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}
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}
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} else {
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const result = await storageService.getFile(userId, fileName);
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if (result) {
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pptExists = true;
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}
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}
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if (!pptExists) {
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return res.status(404).json({ error: 'PPT not found' });
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}
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const baseUrl = process.env.PUBLIC_URL || req.get('host');
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const protocol = process.env.NODE_ENV === 'production' ? 'https' : req.protocol;
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const shareLinks = {
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slideUrl: `${protocol}://${baseUrl}/api/public/view/${userId}/${pptId}/${slideIndex}`,
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pptUrl: `${protocol}://${baseUrl}/api/public/ppt/${userId}/${pptId}`,
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viewUrl: `${protocol}://${baseUrl}/public/${userId}/${pptId}/${slideIndex}`
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};
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res.json(shareLinks);
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} catch (error) {
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next(error);
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}
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});
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export default router; |
