Add the Post service code.

src/config.ts

@@ -1,2 +1,3 @@
 export const POST_PATH: string = __dirname + '/../posts';
 export const STATIC_PATH: string = __dirname + '/../static';
+export const POST_ROUTE_PREFIX: string = '/posts'

src/models/Post.ts

@@ -1,4 +1,4 @@
-import { PostMeta } from '@blog/model/PostMeta';
+import { PostMeta } from '@blog/models/PostMeta';
 
 export type Post = {
   meta: PostMeta,

src/post/post-reader.ts

@@ -1,6 +1,6 @@
 import { marked } from 'marked';
-import type { Post } from '@blog/model/Post';
-import type { PostMeta } from '@blog/model/PostMeta';
+import type { Post } from '@blog/models/Post';
+import type { PostMeta } from '@blog/models/PostMeta';
 import * as yamlFront from 'yaml-front-matter';
 import { readdir } from 'node:fs/promises';
 

src/services/post-file.ts

@@ -1,5 +1,50 @@
-import { POST_PATH } from '@blog/config';
+import { POST_PATH, POST_ROUTE_PREFIX } from '@blog/config';
+import { readdir } from 'node:fs/promises';
+import type { Post } from '@blog/models/Post';
+import * as yamlFront from 'yaml-front-matter';
+import { marked } from 'marked';
 
 export class PostFileService {
+  private postFiles: string[];
+  private posts: Record<string, Post>;
 
+  public constructor(postFiles: string[]) {
+    this.postFiles = postFiles;
+    this.posts = new Record<string, Post>();
+  }
+
+  public static async create() {
+    const posts = new Record<string, Post>();
+    const postFiles: string[] = await readdir(POST_PATH);
+    for (const postFile in postFiles) {
+      const post = await this.readPostFile(postFile);
+      posts.add(postFile, post);
+    }
+
+    return new PostFileService(postFiles);
+  }
+
+  protected async openFileAsText(fileName: string): Promise<string> {
+    const file = Bun.file(POST_PATH + '/' + fileName);
+    return file.text();
+  }
+
+  protected async readPostFile(fileName: string): Promise<Post> {
+    const fileContent = await this.openFileAsText(fileName);
+    const parsedData = yamlFront.loadFront(fileContent);  
+    const postHtml = await marked.parse(parsedData.__content);
+
+    return {
+      meta: {
+        title: parsedData.title,
+        description: parsedData.description,
+        date: new Date(parsedData.date),
+        draft: parsedData?.draft || false,
+        tags: parsedData.tags,
+        slug: POST_ROUTE_PREFIX + '/' + fileName,
+      },
+      content: parsedData.__content,
+      html: postHtml
+    };
+  }
 }