feat(blog): allow processing blog posts through a processBlogPosts function

packages/docusaurus-plugin-content-blog/src/__tests__/__snapshots__/index.test.ts.snap

@@ -1,5 +1,244 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`blog plugin process blog posts load content 1`] = `
+{
+  "/blog/tags/tag-1": {
+    "items": [
+      "/simple/slug/another",
+      "/another/tags",
+      "/another/tags2",
+    ],
+    "label": "tag1",
+    "pages": [
+      {
+        "items": [
+          "/simple/slug/another",
+        ],
+        "metadata": {
+          "blogDescription": "Blog",
+          "blogTitle": "Blog",
+          "nextPage": "/blog/tags/tag-1/page/2",
+          "page": 1,
+          "permalink": "/blog/tags/tag-1",
+          "postsPerPage": 1,
+          "previousPage": undefined,
+          "totalCount": 3,
+          "totalPages": 3,
+        },
+      },
+      {
+        "items": [
+          "/another/tags",
+        ],
+        "metadata": {
+          "blogDescription": "Blog",
+          "blogTitle": "Blog",
+          "nextPage": "/blog/tags/tag-1/page/3",
+          "page": 2,
+          "permalink": "/blog/tags/tag-1/page/2",
+          "postsPerPage": 1,
+          "previousPage": "/blog/tags/tag-1",
+          "totalCount": 3,
+          "totalPages": 3,
+        },
+      },
+      {
+        "items": [
+          "/another/tags2",
+        ],
+        "metadata": {
+          "blogDescription": "Blog",
+          "blogTitle": "Blog",
+          "nextPage": undefined,
+          "page": 3,
+          "permalink": "/blog/tags/tag-1/page/3",
+          "postsPerPage": 1,
+          "previousPage": "/blog/tags/tag-1/page/2",
+          "totalCount": 3,
+          "totalPages": 3,
+        },
+      },
+    ],
+    "permalink": "/blog/tags/tag-1",
+    "unlisted": false,
+  },
+  "/blog/tags/tag-2": {
+    "items": [
+      "/another/tags",
+      "/another/tags2",
+    ],
+    "label": "tag2",
+    "pages": [
+      {
+        "items": [
+          "/another/tags",
+        ],
+        "metadata": {
+          "blogDescription": "Blog",
+          "blogTitle": "Blog",
+          "nextPage": "/blog/tags/tag-2/page/2",
+          "page": 1,
+          "permalink": "/blog/tags/tag-2",
+          "postsPerPage": 1,
+          "previousPage": undefined,
+          "totalCount": 2,
+          "totalPages": 2,
+        },
+      },
+      {
+        "items": [
+          "/another/tags2",
+        ],
+        "metadata": {
+          "blogDescription": "Blog",
+          "blogTitle": "Blog",
+          "nextPage": undefined,
+          "page": 2,
+          "permalink": "/blog/tags/tag-2/page/2",
+          "postsPerPage": 1,
+          "previousPage": "/blog/tags/tag-2",
+          "totalCount": 2,
+          "totalPages": 2,
+        },
+      },
+    ],
+    "permalink": "/blog/tags/tag-2",
+    "unlisted": false,
+  },
+}
+`;
+
+exports[`blog plugin process blog posts load content 2`] = `
+[
+  {
+    "content": "simple url slug",
+    "id": "/simple/slug/another",
+    "metadata": {
+      "authors": [
+        {
+          "imageURL": undefined,
+          "name": "Sébastien Lorber",
+          "title": "Docusaurus maintainer",
+          "url": "https://sebastienlorber.com",
+        },
+      ],
+      "date": 2020-08-15T00:00:00.000Z,
+      "description": "simple url slug",
+      "editUrl": "https://baseEditUrl.com/edit/blog/another-simple-slug-with-tags.md",
+      "frontMatter": {
+        "author": "Sébastien Lorber",
+        "author_title": "Docusaurus maintainer",
+        "author_url": "https://sebastienlorber.com",
+        "date": 2020-08-15T00:00:00.000Z,
+        "slug": "/simple/slug/another",
+        "tags": [
+          "tag1",
+        ],
+        "title": "Another Simple Slug",
+      },
+      "hasTruncateMarker": false,
+      "nextItem": {
+        "permalink": "/blog/another/tags",
+        "title": "Another With Tag",
+      },
+      "permalink": "/blog/simple/slug/another",
+      "readingTime": 0.015,
+      "source": "@site/blog/another-simple-slug-with-tags.md",
+      "tags": [
+        {
+          "label": "tag1",
+          "permalink": "/blog/tags/tag-1",
+        },
+      ],
+      "title": "Another Simple Slug",
+      "unlisted": false,
+    },
+  },
+  {
+    "content": "with tag",
+    "id": "/another/tags",
+    "metadata": {
+      "authors": [],
+      "date": 2020-08-15T00:00:00.000Z,
+      "description": "with tag",
+      "editUrl": "https://baseEditUrl.com/edit/blog/another-with-tags.md",
+      "frontMatter": {
+        "date": 2020-08-15T00:00:00.000Z,
+        "slug": "/another/tags",
+        "tags": [
+          "tag1",
+          "tag2",
+        ],
+        "title": "Another With Tag",
+      },
+      "hasTruncateMarker": false,
+      "nextItem": {
+        "permalink": "/blog/another/tags2",
+        "title": "Another With Tag",
+      },
+      "permalink": "/blog/another/tags",
+      "prevItem": {
+        "permalink": "/blog/simple/slug/another",
+        "title": "Another Simple Slug",
+      },
+      "readingTime": 0.01,
+      "source": "@site/blog/another-with-tags.md",
+      "tags": [
+        {
+          "label": "tag1",
+          "permalink": "/blog/tags/tag-1",
+        },
+        {
+          "label": "tag2",
+          "permalink": "/blog/tags/tag-2",
+        },
+      ],
+      "title": "Another With Tag",
+      "unlisted": false,
+    },
+  },
+  {
+    "content": "with tag",
+    "id": "/another/tags2",
+    "metadata": {
+      "authors": [],
+      "date": 2020-08-15T00:00:00.000Z,
+      "description": "with tag",
+      "editUrl": "https://baseEditUrl.com/edit/blog/another-with-tags2.md",
+      "frontMatter": {
+        "date": 2020-08-15T00:00:00.000Z,
+        "slug": "/another/tags2",
+        "tags": [
+          "tag1",
+          "tag2",
+        ],
+        "title": "Another With Tag",
+      },
+      "hasTruncateMarker": false,
+      "permalink": "/blog/another/tags2",
+      "prevItem": {
+        "permalink": "/blog/another/tags",
+        "title": "Another With Tag",
+      },
+      "readingTime": 0.01,
+      "source": "@site/blog/another-with-tags2.md",
+      "tags": [
+        {
+          "label": "tag1",
+          "permalink": "/blog/tags/tag-1",
+        },
+        {
+          "label": "tag2",
+          "permalink": "/blog/tags/tag-2",
+        },
+      ],
+      "title": "Another With Tag",
+      "unlisted": false,
+    },
+  },
+]
+`;
+
 exports[`blog plugin works on blog tags without pagination 1`] = `
 {
   "/blog/tags/tag-1": {

packages/docusaurus-plugin-content-blog/src/__tests__/blogUtils.test.ts

@@ -14,10 +14,12 @@ import {
   linkify,
   getSourceToPermalink,
   paginateBlogPosts,
+  applyProcessBlogPosts,
   type LinkifyParams,
 } from '../blogUtils';
 import type {BlogBrokenMarkdownLink, BlogContentPaths} from '../types';
 import type {BlogPost} from '@docusaurus/plugin-content-blog';
+import type {DeepPartial} from 'utility-types';
 
 describe('truncate', () => {
   it('truncates texts', () => {
@@ -237,6 +239,7 @@ describe('linkify', () => {
         frontMatter: {},
         authors: [],
         formattedDate: '',
+        unlisted: false,
       },
       content: '',
     },
@@ -295,3 +298,99 @@ describe('linkify', () => {
     } as BlogBrokenMarkdownLink);
   });
 });
+
+const createBlogPost = (args: DeepPartial<BlogPost>): BlogPost => ({
+  id: '',
+  metadata: {
+    source: '',
+    title: '',
+    formattedDate: '',
+    permalink: '',
+    description: '',
+    hasTruncateMarker: false,
+    authors: [],
+    frontMatter: {},
+    tags: [],
+    unlisted: false,
+    ...args.metadata,
+  } as BlogPost['metadata'],
+  content: args.content || '',
+});
+
+describe('processBlogPosts', () => {
+  const blogPost2022 = createBlogPost({
+    metadata: {date: new Date('2022-01-01')},
+  });
+  const blogPost2023 = createBlogPost({
+    metadata: {date: new Date('2023-01-01')},
+  });
+  const blogPost2024 = createBlogPost({
+    metadata: {date: new Date('2024-01-01')},
+  });
+
+  it('filter blogs only from 2024', async () => {
+    const processedBlogPosts = await applyProcessBlogPosts({
+      blogPosts: [blogPost2022, blogPost2023, blogPost2024],
+      processBlogPosts: async ({blogPosts}: {blogPosts: BlogPost[]}) =>
+        blogPosts.filter(
+          (blogPost) => blogPost.metadata.date.getFullYear() === 2024,
+        ),
+    });
+
+    expect(processedBlogPosts).toEqual([blogPost2024]);
+  });
+
+  it('sort blogs by date in ascending order', async () => {
+    const processedBlogPosts = await applyProcessBlogPosts({
+      blogPosts: [blogPost2023, blogPost2022, blogPost2024],
+      processBlogPosts: async ({blogPosts}: {blogPosts: BlogPost[]}) =>
+        blogPosts.sort(
+          (a, b) => a.metadata.date.getTime() - b.metadata.date.getTime(),
+        ),
+    });
+
+    expect(processedBlogPosts).toEqual([
+      blogPost2022,
+      blogPost2023,
+      blogPost2024,
+    ]);
+  });
+
+  it('sort blogs by date in descending order', async () => {
+    const processedBlogPosts = await applyProcessBlogPosts({
+      blogPosts: [blogPost2023, blogPost2022, blogPost2024],
+      processBlogPosts: async ({blogPosts}: {blogPosts: BlogPost[]}) =>
+        blogPosts.sort(
+          (a, b) => b.metadata.date.getTime() - a.metadata.date.getTime(),
+        ),
+    });
+
+    expect(processedBlogPosts).toEqual([
+      blogPost2024,
+      blogPost2023,
+      blogPost2022,
+    ]);
+  });
+
+  it('processBlogPosts return 2022 only', async () => {
+    const processedBlogPosts = await applyProcessBlogPosts({
+      blogPosts: [blogPost2023, blogPost2022, blogPost2024],
+      processBlogPosts: async () => [blogPost2022],
+    });
+
+    expect(processedBlogPosts).toEqual([blogPost2022]);
+  });
+
+  it('processBlogPosts return undefined', async () => {
+    const processedBlogPosts = await applyProcessBlogPosts({
+      blogPosts: [blogPost2023, blogPost2022, blogPost2024],
+      processBlogPosts: async () => {},
+    });
+
+    expect(processedBlogPosts).toEqual([
+      blogPost2023,
+      blogPost2022,
+      blogPost2024,
+    ]);
+  });
+});