feat: markdown to html

src/articles/articles.resolver.ts

@@ -1,8 +1,17 @@
-import { Resolver, Query, Mutation, Args, Int } from '@nestjs/graphql';
+import {
+  Resolver,
+  Query,
+  Mutation,
+  Args,
+  Int,
+  ResolveField,
+  Parent,
+} from '@nestjs/graphql';
 import { ArticlesService } from './articles.service';
 import { Article } from './entities/article.entity';
 import { CreateArticleInput } from './dto/create-article.input';
 import { UpdateArticleInput } from './dto/update-article.input';
+import * as marked from 'marked';
 
 @Resolver(() => Article)
 export class ArticlesResolver {
@@ -16,8 +25,8 @@ export class ArticlesResolver {
   }
 
   @Query(() => [Article], { name: 'articles' })
-  findAll() {
-    return this.articlesService.findAll();
+  async findAll() {
+    return await this.articlesService.findAll();
   }
 
   @Query(() => Article, { name: 'article' })
@@ -37,4 +46,19 @@ export class ArticlesResolver {
   removeArticle(@Args('id', { type: () => String }) id: string) {
     return this.articlesService.remove(id);
   }
+
+  @ResolveField(() => String)
+  async html(@Parent() article: Article) {
+    return marked(article.content);
+  }
+
+  @ResolveField(() => String, { nullable: true })
+  async description(@Parent() article: Article) {
+    const tokens = marked.lexer(article.content);
+    const token = tokens.find((token) =>
+      ['blockquote', 'paragraph'].includes(token.type),
+    ) as { text: string };
+
+    return token?.text;
+  }
 }

src/articles/dto/article-list-item.dto.ts

@@ -0,0 +1,7 @@
+import { ObjectType, OmitType } from '@nestjs/graphql';
+import { Article } from '../entities/article.entity';
+
+@ObjectType()
+export class ArticleListItemDto extends OmitType(Article, [
+  'content',
+] as const) {}