🪛 markdown renderer

lib/markdown.ts

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+import fs from 'fs';
+import path from 'path';
+import matter from 'gray-matter';
+import { FrontMatter, Post } from './types/frontmatter';
+import { generateExcerpt } from './utils';
+
+const POSTS_PATH = path.join(process.cwd(), 'content', 'blog');
+
+export function sanitizePath(inputPath: string): string {
+  const normalized = path.normalize(inputPath).replace(/^(\.\.[\/\\])+/, '');
+  if (normalized.includes('..') || path.isAbsolute(normalized)) {
+    throw new Error('Invalid path');
+  }
+  return normalized;
+}
+
+export function calculateReadingTime(content: string): number {
+  const wordsPerMinute = 200;
+  const words = content.trim().split(/\s+/).length;
+  return Math.ceil(words / wordsPerMinute);
+}
+
+export function validateFrontmatter(data: any): FrontMatter {
+  if (!data.title || typeof data.title !== 'string') {
+    throw new Error('Invalid title');
+  }
+  if (!data.description || typeof data.description !== 'string') {
+    throw new Error('Invalid description');
+  }
+  if (!data.date || typeof data.date !== 'string') {
+    throw new Error('Invalid date');
+  }
+  if (!data.author || typeof data.author !== 'string') {
+    throw new Error('Invalid author');
+  }
+  if (!data.category || typeof data.category !== 'string') {
+    throw new Error('Invalid category');
+  }
+  if (!Array.isArray(data.tags) || data.tags.length === 0 || data.tags.length > 3) {
+    throw new Error('Tags must be array with 1-3 items');
+  }
+
+  return {
+    title: data.title,
+    description: data.description,
+    date: data.date,
+    author: data.author,
+    category: data.category,
+    tags: data.tags,
+    image: data.image,
+    draft: data.draft || false,
+  };
+}
+
+export function getPostBySlug(slug: string[]): Post {
+  const sanitized = slug.map(s => sanitizePath(s));
+  const fullPath = path.join(POSTS_PATH, ...sanitized) + '.md';
+
+  if (!fs.existsSync(fullPath)) {
+    throw new Error('Post not found');
+  }
+
+  const fileContents = fs.readFileSync(fullPath, 'utf8');
+  const { data, content } = matter(fileContents);
+  const frontmatter = validateFrontmatter(data);
+
+  return {
+    slug: sanitized.join('/'),
+    frontmatter,
+    content,
+    readingTime: calculateReadingTime(content),
+    excerpt: generateExcerpt(content),
+  };
+}
+
+export function getAllPosts(includeContent = false): Post[] {
+  const posts: Post[] = [];
+
+  function walkDir(dir: string, prefix = ''): void {
+    const files = fs.readdirSync(dir);
+
+    for (const file of files) {
+      const filePath = path.join(dir, file);
+      const stat = fs.statSync(filePath);
+
+      if (stat.isDirectory()) {
+        walkDir(filePath, prefix ? `${prefix}/${file}` : file);
+      } else if (file.endsWith('.md')) {
+        const slug = prefix ? `${prefix}/${file.replace(/\.md$/, '')}` : file.replace(/\.md$/, '');
+        try {
+          const post = getPostBySlug(slug.split('/'));
+          if (!post.frontmatter.draft) {
+            posts.push(includeContent ? post : { ...post, content: '' });
+          }
+        } catch (error) {
+          console.error(`Error loading post ${slug}:`, error);
+        }
+      }
+    }
+  }
+
+  if (fs.existsSync(POSTS_PATH)) {
+    walkDir(POSTS_PATH);
+  }
+
+  return posts.sort((a, b) => new Date(b.frontmatter.date).getTime() - new Date(a.frontmatter.date).getTime());
+}
+
+export function getRelatedPosts(currentSlug: string, category: string, tags: string[], limit = 3): Post[] {
+  const allPosts = getAllPosts(false);
+
+  const scored = allPosts
+    .filter(post => post.slug !== currentSlug)
+    .map(post => {
+      let score = 0;
+      if (post.frontmatter.category === category) score += 3;
+      score += post.frontmatter.tags.filter(tag => tags.includes(tag)).length * 2;
+      return { post, score };
+    })
+    .filter(({ score }) => score > 0)
+    .sort((a, b) => b.score - a.score);
+
+  return scored.slice(0, limit).map(({ post }) => post);
+}
+
+export function getAllPostSlugs(): string[][] {
+  const slugs: string[][] = [];
+
+  function walkDir(dir: string, prefix: string[] = []): void {
+    const files = fs.readdirSync(dir);
+
+    for (const file of files) {
+      const filePath = path.join(dir, file);
+      const stat = fs.statSync(filePath);
+
+      if (stat.isDirectory()) {
+        walkDir(filePath, [...prefix, file]);
+      } else if (file.endsWith('.md')) {
+        slugs.push([...prefix, file.replace(/\.md$/, '')]);
+      }
+    }
+  }
+
+  if (fs.existsSync(POSTS_PATH)) {
+    walkDir(POSTS_PATH);
+  }
+
+  return slugs;
+}

lib/types/frontmatter.ts

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+export interface FrontMatter {
+  title: string;
+  description: string;
+  date: string;
+  author: string;
+  category: string;
+  tags: string[];
+  image?: string;
+  draft?: boolean;
+}
+
+export interface Post {
+  slug: string;
+  frontmatter: FrontMatter;
+  content: string;
+  readingTime: number;
+  excerpt: string;
+}
+
+export interface BlogParams {
+  slug: string[];
+}

lib/utils.ts

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+export function formatDate(dateString: string): string {
+  const date = new Date(dateString);
+  const months = [
+    'ianuarie', 'februarie', 'martie', 'aprilie', 'mai', 'iunie',
+    'iulie', 'august', 'septembrie', 'octombrie', 'noiembrie', 'decembrie'
+  ];
+
+  return `${date.getDate()} ${months[date.getMonth()]} ${date.getFullYear()}`;
+}
+
+export function formatRelativeDate(dateString: string): string {
+  const date = new Date(dateString);
+  const now = new Date();
+  const diffTime = Math.abs(now.getTime() - date.getTime());
+  const diffDays = Math.ceil(diffTime / (1000 * 60 * 60 * 24));
+
+  if (diffDays === 0) return 'astăzi';
+  if (diffDays === 1) return 'ieri';
+  if (diffDays < 7) return `acum ${diffDays} zile`;
+  if (diffDays < 30) return `acum ${Math.floor(diffDays / 7)} săptămâni`;
+  if (diffDays < 365) return `acum ${Math.floor(diffDays / 30)} luni`;
+  return `acum ${Math.floor(diffDays / 365)} ani`;
+}
+
+export function generateExcerpt(content: string, maxLength = 160): string {
+  const text = content
+    .replace(/^---[\s\S]*?---/, '')
+    .replace(/!\[.*?\]\(.*?\)/g, '')
+    .replace(/\[([^\]]+)\]\([^\)]+\)/g, '$1')
+    .replace(/[#*`]/g, '')
+    .trim();
+
+  if (text.length <= maxLength) return text;
+
+  const truncated = text.slice(0, maxLength);
+  const lastSpace = truncated.lastIndexOf(' ');
+  return truncated.slice(0, lastSpace) + '...';
+}
+
+export function generateSlug(title: string): string {
+  const romanianMap: Record<string, string> = {
+    'ă': 'a', 'â': 'a', 'î': 'i', 'ș': 's', 'ț': 't',
+    'Ă': 'a', 'Â': 'a', 'Î': 'i', 'Ș': 's', 'Ț': 't'
+  };
+
+  return title
+    .split('')
+    .map(char => romanianMap[char] || char)
+    .join('')
+    .toLowerCase()
+    .replace(/[^a-z0-9]+/g, '-')
+    .replace(/^-+|-+$/g, '');
+}