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import express from 'express';
import githubService from '../services/githubService.js';
import memoryStorageService from '../services/memoryStorageService.js';
const router = express.Router();
// 选择存储服务
const getStorageService = () => {
// 如果GitHub Token未配置,使用内存存储
if (!process.env.GITHUB_TOKEN) {
return memoryStorageService;
}
return githubService;
};
// 生成HTML页面来显示PPT幻灯片
const generateSlideHTML = (pptData, slideIndex, title) => {
const slide = pptData.slides[slideIndex];
const theme = pptData.theme || {};
// 渲染幻灯片元素
const renderElements = (elements) => {
if (!elements || elements.length === 0) return '';
return elements.map(element => {
const style = `
position: absolute;
left: ${element.left}px;
top: ${element.top}px;
width: ${element.width}px;
height: ${element.height}px;
transform: rotate(${element.rotate || 0}deg);
z-index: ${element.zIndex || 1};
`;
switch (element.type) {
case 'text':
return `
<div style="${style}
font-size: ${element.fontSize || 14}px;
font-family: ${element.fontName || 'Arial'};
color: ${element.defaultColor || '#000'};
font-weight: ${element.bold ? 'bold' : 'normal'};
font-style: ${element.italic ? 'italic' : 'normal'};
text-decoration: ${element.underline ? 'underline' : 'none'};
text-align: ${element.align || 'left'};
line-height: ${element.lineHeight || 1.2};
padding: 10px;
word-wrap: break-word;
overflow: hidden;
">
${element.content || ''}
</div>
`;
case 'image':
return `
<div style="${style}">
<img src="${element.src}" alt="" style="width: 100%; height: 100%; object-fit: ${element.objectFit || 'contain'};" />
</div>
`;
case 'shape':
const shapeStyle = element.fill ? `background-color: ${element.fill};` : '';
const borderStyle = element.outline ? `border: ${element.outline.width || 1}px ${element.outline.style || 'solid'} ${element.outline.color || '#000'};` : '';
return `
<div style="${style} ${shapeStyle} ${borderStyle}"></div>
`;
default:
return `<div style="${style}"></div>`;
}
}).join('');
};
return `
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>${title} - 第${slideIndex + 1}页</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html, body {
width: 100%;
height: 100%;
overflow: hidden;
font-family: 'Microsoft YaHei', Arial, sans-serif;
background-color: #000;
}
.viewport-container {
width: 100vw;
height: 100vh;
display: flex;
justify-content: center;
align-items: center;
background-color: #000;
}
.slide-container {
width: 1000px;
height: 750px;
background-color: ${slide.background?.color || theme.backgroundColor || '#ffffff'};
position: relative;
transform-origin: center center;
overflow: hidden;
}
${slide.background?.type === 'image' ? `
.slide-container::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-image: url('${slide.background.image}');
background-size: ${slide.background.imageSize || 'cover'};
background-position: center;
background-repeat: no-repeat;
z-index: 0;
}
` : ''}
</style>
</head>
<body>
<div class="viewport-container">
<div class="slide-container" id="slideContainer">
${renderElements(slide.elements)}
</div>
</div>
<script>
function resizeSlide() {
const container = document.getElementById('slideContainer');
const viewport = container.parentElement;
// PPT标准尺寸 (4:3 比例)
const slideWidth = 1000;
const slideHeight = 750;
// 窗口尺寸
const windowWidth = viewport.clientWidth;
const windowHeight = viewport.clientHeight;
// 计算缩放比例,使PPT填满窗口
const scaleX = windowWidth / slideWidth;
const scaleY = windowHeight / slideHeight;
const scale = Math.max(scaleX, scaleY); // 使用较大的缩放比例以填满窗口
// 应用缩放
container.style.transform = \`scale(\${scale})\`;
console.log(\`Window: \${windowWidth}x\${windowHeight}, Scale: \${scale}\`);
}
// 页面加载时调整大小
window.addEventListener('load', resizeSlide);
// 窗口大小改变时重新调整
window.addEventListener('resize', resizeSlide);
</script>
</body>
</html>
`;
};
// 公开访问PPT页面 - 返回HTML页面
router.get('/view/:userId/:pptId/:slideIndex?', async (req, res, next) => {
try {
const { userId, pptId, slideIndex = 0 } = req.params;
const querySlideIndex = req.query.slide ? parseInt(req.query.slide) : parseInt(slideIndex);
const fileName = `${pptId}.json`;
const storageService = getStorageService();
let pptData = null;
// 如果是GitHub服务,尝试所有仓库
if (storageService === githubService && storageService.repositories) {
for (let i = 0; i < storageService.repositories.length; i++) {
try {
const result = await storageService.getFile(userId, fileName, i);
if (result) {
pptData = result.content;
break;
}
} catch (error) {
continue;
}
}
} else {
// 内存存储服务
const result = await storageService.getFile(userId, fileName);
if (result) {
pptData = result.content;
}
}
if (!pptData) {
return res.status(404).send(`
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>PPT未找到</title>
<style>
body { font-family: Arial, sans-serif; text-align: center; padding: 50px; }
.error { color: #e74c3c; font-size: 18px; }
</style>
</head>
<body>
<div class="error">
<h2>PPT未找到</h2>
<p>请检查链接是否正确</p>
</div>
</body>
</html>
`);
}
const slideIdx = querySlideIndex;
if (slideIdx >= pptData.slides.length || slideIdx < 0) {
return res.status(404).send(`
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>幻灯片未找到</title>
<style>
body { font-family: Arial, sans-serif; text-align: center; padding: 50px; }
.error { color: #e74c3c; font-size: 18px; }
</style>
</head>
<body>
<div class="error">
<h2>幻灯片未找到</h2>
<p>请检查幻灯片索引是否正确</p>
</div>
</body>
</html>
`);
}
// 返回HTML页面
const htmlContent = generateSlideHTML(pptData, slideIdx, pptData.title);
res.setHeader('Content-Type', 'text/html; charset=utf-8');
res.send(htmlContent);
} catch (error) {
next(error);
}
});
// API接口:获取PPT数据和指定幻灯片(JSON格式)
router.get('/api-view/:userId/:pptId/:slideIndex?', async (req, res, next) => {
try {
const { userId, pptId, slideIndex = 0 } = req.params;
const fileName = `${pptId}.json`;
const storageService = getStorageService();
let pptData = null;
// 如果是GitHub服务,尝试所有仓库
if (storageService === githubService && storageService.repositories) {
for (let i = 0; i < storageService.repositories.length; i++) {
try {
const result = await storageService.getFile(userId, fileName, i);
if (result) {
pptData = result.content;
break;
}
} catch (error) {
continue;
}
}
} else {
// 内存存储服务
const result = await storageService.getFile(userId, fileName);
if (result) {
pptData = result.content;
}
}
if (!pptData) {
return res.status(404).json({ error: 'PPT not found' });
}
const slideIdx = parseInt(slideIndex);
if (slideIdx >= pptData.slides.length || slideIdx < 0) {
return res.status(404).json({ error: 'Slide not found' });
}
// 返回PPT数据和指定幻灯片
res.json({
id: pptData.id,
title: pptData.title,
theme: pptData.theme,
currentSlide: pptData.slides[slideIdx],
slideIndex: slideIdx,
totalSlides: pptData.slides.length,
isPublicView: true
});
} catch (error) {
next(error);
}
});
// 获取完整PPT数据(只读模式)
router.get('/ppt/:userId/:pptId', async (req, res, next) => {
try {
const { userId, pptId } = req.params;
const fileName = `${pptId}.json`;
const storageService = getStorageService();
let pptData = null;
// 如果是GitHub服务,尝试所有仓库
if (storageService === githubService && storageService.repositories) {
for (let i = 0; i < storageService.repositories.length; i++) {
try {
const result = await storageService.getFile(userId, fileName, i);
if (result) {
pptData = result.content;
break;
}
} catch (error) {
continue;
}
}
} else {
// 内存存储服务
const result = await storageService.getFile(userId, fileName);
if (result) {
pptData = result.content;
}
}
if (!pptData) {
return res.status(404).json({ error: 'PPT not found' });
}
// 返回只读版本的PPT数据
res.json({
...pptData,
isPublicView: true,
readOnly: true
});
} catch (error) {
next(error);
}
});
// 生成PPT分享链接
router.post('/generate-share-link', async (req, res, next) => {
try {
const { userId, pptId, slideIndex = 0 } = req.body;
if (!userId || !pptId) {
return res.status(400).json({ error: 'User ID and PPT ID are required' });
}
console.log(`Generating share link for PPT: ${pptId}, User: ${userId}`);
// 验证PPT是否存在
const fileName = `${pptId}.json`;
const storageService = getStorageService();
let pptExists = false;
let pptData = null;
console.log(`Using storage service: ${storageService === githubService ? 'GitHub' : 'Memory'}`);
// 如果是GitHub服务,尝试所有仓库
if (storageService === githubService && storageService.repositories) {
console.log(`Checking ${storageService.repositories.length} GitHub repositories...`);
for (let i = 0; i < storageService.repositories.length; i++) {
try {
console.log(`Checking repository ${i}: ${storageService.repositories[i]}`);
const result = await storageService.getFile(userId, fileName, i);
if (result) {
pptExists = true;
pptData = result.content;
console.log(`PPT found in repository ${i}`);
break;
}
} catch (error) {
console.log(`PPT not found in repository ${i}: ${error.message}`);
continue;
}
}
} else {
// 内存存储服务
console.log('Checking memory storage...');
try {
const result = await storageService.getFile(userId, fileName);
if (result) {
pptExists = true;
pptData = result.content;
console.log('PPT found in memory storage');
}
} catch (error) {
console.log(`PPT not found in memory storage: ${error.message}`);
}
}
if (!pptExists) {
console.log('PPT not found in any storage location');
// 额外尝试:如果GitHub失败,检查memory storage作为fallback
if (storageService === githubService) {
console.log('GitHub lookup failed, trying memory storage fallback...');
try {
const memoryResult = await memoryStorageService.getFile(userId, fileName);
if (memoryResult) {
pptExists = true;
pptData = memoryResult.content;
console.log('PPT found in memory storage fallback');
}
} catch (memoryError) {
console.log(`Memory storage fallback also failed: ${memoryError.message}`);
}
}
}
if (!pptExists) {
return res.status(404).json({
error: 'PPT not found',
details: `PPT ${pptId} not found for user ${userId}`,
searchedLocations: storageService === githubService ? 'GitHub repositories and memory storage' : 'Memory storage only'
});
}
const baseUrl = process.env.PUBLIC_URL || req.get('host');
const protocol = process.env.NODE_ENV === 'production' ? 'https' : req.protocol;
const shareLinks = {
// 单页分享链接
slideUrl: `${protocol}://${baseUrl}/api/public/view/${userId}/${pptId}/${slideIndex}`,
// 完整PPT分享链接
pptUrl: `${protocol}://${baseUrl}/api/public/ppt/${userId}/${pptId}`,
// 前端查看链接
viewUrl: `${protocol}://${baseUrl}/public/${userId}/${pptId}/${slideIndex}`,
// 添加PPT信息
pptInfo: {
id: pptId,
title: pptData?.title || 'Unknown Title',
slideCount: pptData?.slides?.length || 0
}
};
console.log('Share links generated successfully:', shareLinks);
res.json(shareLinks);
} catch (error) {
console.error('Share link generation error:', error);
next(error);
}
});
export default router;