add content service and core config

src/modules/content/services/post.service.ts

@@ -0,0 +1,58 @@
+import { Injectable, NotFoundException } from '@nestjs/common';
+import { isNil } from '@nestjs/common/utils/shared.utils';
+
+import { CreatePostDto } from '@/modules/content/dtos/create-post.dto';
+import { UpdatePostDto } from '@/modules/content/dtos/update-post.dto';
+import { PostEntity } from '@/modules/content/types';
+
+@Injectable()
+export class PostService {
+    protected posts: PostEntity[] = [
+        { title: '第一篇文章标题', body: '第一篇文章内容' },
+        { title: '第二篇文章标题', body: '第二篇文章内容' },
+        { title: '第三篇文章标题', body: '第三篇文章内容' },
+        { title: '第四篇文章标题', body: '第四篇文章内容' },
+        { title: '第五篇文章标题', body: '第五篇文章内容' },
+        { title: '第六篇文章标题', body: '第六篇文章内容' },
+    ].map((v, id) => ({ ...v, id }));
+
+    async findAll() {
+        return this.posts;
+    }
+
+    async findOne(id: number) {
+        const post = this.posts.find((item) => item.id === id);
+        if (isNil(post)) {
+            throw new NotFoundException(`the post with id ${id} not exits!`);
+        }
+        return post;
+    }
+
+    async create(data: CreatePostDto) {
+        const newPost: PostEntity = {
+            id: Math.max(...this.posts.map(({ id }) => id + 1)),
+            ...data,
+        };
+        this.posts.push(newPost);
+        return newPost;
+    }
+
+    async update(data: UpdatePostDto) {
+        let toUpdate = this.posts.find((item) => item.id === data.id);
+        if (isNil(toUpdate)) {
+            throw new NotFoundException(`the post with id ${data.id} not exits!`);
+        }
+        toUpdate = { ...toUpdate, ...data };
+        this.posts = this.posts.filter((item) => (item.id === data.id ? toUpdate : item));
+        return toUpdate;
+    }
+
+    async delete(id: number) {
+        const toDelete = this.posts.find((item) => item.id === id);
+        if (isNil(toDelete)) {
+            throw new NotFoundException(`the post with id ${id} not exits!`);
+        }
+        this.posts = this.posts.filter((item) => item.id !== id);
+        return toDelete;
+    }
+}