AI Implementation feature(869): Admin Area Blog and Blog Page (#58)

frontend/src/app/core/services/blog.service.ts

@@ -0,0 +1,74 @@
+import { Injectable, inject } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { firstValueFrom } from 'rxjs';
+
+export type BlogStatus = 'draft' | 'published';
+
+export interface AdminBlogPost {
+  id: string;
+  title: string;
+  bodyMd: string;
+  status: BlogStatus;
+  createdAt: string;
+  updatedAt: string;
+  publishedAt: string | null;
+}
+
+export interface CreatePostBody {
+  title: string;
+  bodyMd: string;
+  status?: BlogStatus;
+}
+
+export interface UpdatePostBody {
+  title?: string;
+  bodyMd?: string;
+  status?: BlogStatus;
+}
+
+export interface PublicBlogPost {
+  id: string;
+  title: string;
+  publishedAt: string;
+  bodyMd: string;
+}
+
+@Injectable({ providedIn: 'root' })
+export class BlogApiService {
+  private readonly http = inject(HttpClient);
+
+  async listAllPosts(): Promise<AdminBlogPost[]> {
+    return firstValueFrom(
+      this.http.get<AdminBlogPost[]>('/api/v1/admin/blog/posts', { withCredentials: true }),
+    );
+  }
+
+  async createPost(body: CreatePostBody): Promise<AdminBlogPost> {
+    return firstValueFrom(
+      this.http.post<AdminBlogPost>('/api/v1/admin/blog/posts', body, { withCredentials: true }),
+    );
+  }
+
+  async updatePost(id: string, body: UpdatePostBody): Promise<AdminBlogPost> {
+    return firstValueFrom(
+      this.http.put<AdminBlogPost>(`/api/v1/admin/blog/posts/${encodeURIComponent(id)}`, body, {
+        withCredentials: true,
+      }),
+    );
+  }
+
+  async deletePost(id: string): Promise<void> {
+    await firstValueFrom(
+      this.http.delete<void>(`/api/v1/admin/blog/posts/${encodeURIComponent(id)}`, {
+        withCredentials: true,
+      }),
+    );
+  }
+
+  async listPublished(): Promise<PublicBlogPost[]> {
+    const res = await firstValueFrom(
+      this.http.get<{ posts: PublicBlogPost[] }>('/api/v1/blog/posts', { withCredentials: true }),
+    );
+    return res.posts ?? [];
+  }
+}