feat(posts): search posts api

Author: wibus-wee

src/modules/post/post.controller.ts

@@ -178,6 +178,12 @@ export class PostController {
     return await this.redis.del("posts-index");
   }
 
+  @Get("/search")
+  @ApiOperation({ summary: "搜索文章" })
+  async search(@Query("key") key: string) {
+    return await this.postService.search(key);
+  }
+
   @Get("/_like")
   async thumbsUpArticle(
     @Query() query: MongoIdDto,

src/modules/post/post.service.ts

@@ -274,6 +274,9 @@ export class PostService {
     return (await this.postModel.countDocuments({ slug })) === 0;
   }
 
+  /**
+   * 创建文章索引
+   */
   async createIndex() {
     // 1. 获取全部文章（ 仅获取 Text, Title, Summary 字段 ）
     const posts = await this.model.find({
@@ -300,6 +303,40 @@ export class PostService {
     });
   }
 
+  /**
+   * 搜索文章
+   * @param keyword 关键词
+   */
+  search(keyword: string) {
+    return this.redis.get("posts-index").then((index: string) => {
+      if (!index) {
+        return this.createIndex().then(() => {
+          return this.redis.get("posts-index");
+        }).then((index: string) => {
+          return this.search(keyword);
+        }).catch(() => {
+          return [];
+        });
+      }
+      const indexJson = JSON.parse(index);
+      const result = indexJson.filter((post) => {
+        return post.text.includes(keyword) || post.title.includes(keyword);
+      }).map((post) => {
+        return {
+          text: post.text,
+          title: post.title,
+          summary: post.summary,
+          created: post.created,
+        };
+      }).sort((a, b) => {
+        return b.created.getTime() - a.created.getTime();
+      }).slice(0, 10);
+      return result;
+    }).catch(() => {
+      return [];
+    });
+  }
+
   async CreateDefaultPost(cateId: string) {
     await this.postModel.countDocuments({}).then(async (count) => {
       if (!count) {