/**
* Daily Digest Generator Service
*/
export class DigestGenerator {
/**
* Generate daily digest in Markdown format
*/
static generateMarkdown(articles: any[], feedsInfo: any[]): string {
const date = new Date().toISOString().split('T')[0];
let markdown = `# RSS Daily Digest - ${date}\n\n`;
markdown += `## Summary\n\n`;
markdown += `- **Total Articles**: ${articles.length}\n`;
markdown += `- **Feeds**: ${feedsInfo.length}\n\n`;
markdown += `## Top Stories\n\n`;
articles.slice(0, 10).forEach((article, idx) => {
markdown += `### ${idx + 1}. ${article.title}\n\n`;
markdown += `**Source**: ${article.feed_title || 'Unknown'}\n\n`;
markdown += `**Published**: ${new Date(article.pub_date).toLocaleString()}\n\n`;
if (article.description) {
markdown += `${article.description.substring(0, 200)}...\n\n`;
}
markdown += `[Read more](${article.link})\n\n`;
markdown += `---\n\n`;
});
return markdown;
}
/**
* Generate HTML email format
*/
static generateHTML(articles: any[], feedsInfo: any[]): string {
const date = new Date().toISOString().split('T')[0];
let html = `
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
body { font-family: Arial, sans-serif; max-width: 800px; margin: 0 auto; padding: 20px; }
h1 { color: #333; border-bottom: 3px solid #4CAF50; padding-bottom: 10px; }
.article { background: #f9f9f9; padding: 15px; margin: 15px 0; border-left: 4px solid #4CAF50; }
.article h3 { margin-top: 0; color: #2196F3; }
.meta { color: #666; font-size: 0.9em; }
a { color: #2196F3; text-decoration: none; }
a:hover { text-decoration: underline; }
</style>
</head>
<body>
<h1>📰 RSS Daily Digest - ${date}</h1>
<p><strong>Total Articles:</strong> ${articles.length} | <strong>Feeds:</strong> ${feedsInfo.length}</p>
<h2>Top Stories</h2>
`;
articles.slice(0, 10).forEach((article, idx) => {
html += `
<div class="article">
<h3>${idx + 1}. ${article.title}</h3>
<p class="meta">
<strong>Source:</strong> ${article.feed_title || 'Unknown'} |
<strong>Published:</strong> ${new Date(article.pub_date).toLocaleString()}
</p>
<p>${article.description ? article.description.substring(0, 300) + '...' : ''}</p>
<p><a href="${article.link}" target="_blank">Read full article →</a></p>
</div>
`;
});
html += `
</body>
</html>`;
return html;
}
/**
* Generate summary statistics
*/
static generateStats(articles: any[], feedsInfo: any[]): any {
const categoryCount = new Map<string, number>();
articles.forEach(article => {
if (article.categories) {
try {
const cats = JSON.parse(article.categories);
cats.forEach((cat: string) => {
categoryCount.set(cat, (categoryCount.get(cat) || 0) + 1);
});
} catch { }
}
});
const topCategories = Array.from(categoryCount.entries())
.sort((a, b) => b[1] - a[1])
.slice(0, 5)
.map(([category, count]) => ({ category, count }));
return {
total_articles: articles.length,
total_feeds: feedsInfo.length,
top_categories: topCategories,
date_range: {
from: articles[articles.length - 1]?.pub_date || null,
to: articles[0]?.pub_date || null
}
};
}
}
