Added post stats service to return total posts in Explore endpoint

no issue

- The explore endpoint needs to expose the total amount of published posts
- To be more consistent, this PR creates a PostStats class which is exposed as `stats` method within the PostService; just like it's done with the MemberService
- Moved existing method to return the date of the most recently published post into the stats service
- Updated the explore service test to reflect the new return property

ghost/core/core/server/services/explore/service.js

@@ -46,11 +46,13 @@ module.exports = class ExploreService {
             }
         };
 
-        const mostRecentlyPublishedPost = await this.PostsService.getMostRecentlyPublishedPost();
-        exploreProperties.most_recently_published_at = mostRecentlyPublishedPost?.get('published_at') || null;
+        const mostRecentlyPublishedPost = await this.PostsService.stats.getMostRecentlyPublishedPostDate();
+        const totalPostsPublished = await this.PostsService.stats.getTotalPostsPublished();
+        exploreProperties.most_recently_published_at = mostRecentlyPublishedPost ?? null;
+        exploreProperties.total_posts_published = totalPostsPublished ?? null;
 
         const owner = await this.UserModel.findOne({role: 'Owner', status: 'all'});
-        exploreProperties.owner_email = owner?.get('email') || null;
+        exploreProperties.owner_email = owner?.get('email') ?? null;
 
         return exploreProperties;
     }

ghost/core/core/server/services/posts/posts-service.js

@@ -8,11 +8,12 @@ const messages = {
 };
 
 class PostsService {
-    constructor({mega, urlUtils, models, isSet}) {
+    constructor({mega, urlUtils, models, isSet, stats}) {
         this.mega = mega;
         this.urlUtils = urlUtils;
         this.models = models;
         this.isSet = isSet;
+        this.stats = stats;
     }
 
     async editPost(frame) {
@@ -76,20 +77,6 @@ class PostsService {
         }
     }
 
-    /**
-     * Returns the most recently `published_at` post that was published or sent
-     * via email
-     */
-    async getMostRecentlyPublishedPost() {
-        const recentlyPublishedPost = await this.models.Post.findPage({
-            status: ['published', 'sent'],
-            order: 'published_at DESC',
-            limit: 1
-        });
-
-        return recentlyPublishedPost?.data[0];
-    }
-
     /**
      * Calculates if the email should be tried to be sent out
      * @private
@@ -135,12 +122,16 @@ const getPostServiceInstance = () => {
     const {mega} = require('../mega');
     const labs = require('../../../shared/labs');
     const models = require('../../models');
+    const PostStats = require('./stats/post-stats');
+
+    const postStats = new PostStats();
 
     return new PostsService({
         mega: mega,
         urlUtils: urlUtils,
         models: models,
-        isSet: labs.isSet.bind(labs)
+        isSet: labs.isSet.bind(labs),
+        stats: postStats
     });
 };
 

ghost/core/core/server/services/posts/stats/post-stats.js

@@ -0,0 +1,35 @@
+const db = require('../../../data/db');
+class PostStats {
+    #db;
+
+    constructor() {
+        this.#db = db;
+    }
+
+    /**
+     * Returns the most recently `published_at` post that was published or sent
+     * via email
+     */
+    async getMostRecentlyPublishedPostDate() {
+        const result = await this.#db.knex.select('published_at')
+            .from('posts')
+            .whereIn('status', ['sent', 'published'])
+            .orderBy('published_at', 'desc')
+            .limit(1);
+
+        return result?.[0]?.published_at ? new Date(result?.[0]?.published_at) : null;
+    }
+
+    /**
+     * Fetches count of all published posts
+     */
+    async getTotalPostsPublished() {
+        const [result] = await this.#db.knex('posts')
+            .whereIn('status', ['sent', 'published'])
+            .count('id', {as: 'total'});
+
+        return result.total;
+    }
+}
+
+module.exports = PostStats;

ghost/core/test/e2e-api/admin/__snapshots__/explore.test.js.snap

@@ -40,6 +40,7 @@ Object {
       "livemode": false,
     },
     "total_members": 8,
+    "total_posts_published": Any<Number>,
     "version": StringMatching /\\\\d\\+\\\\\\.\\\\d\\+\\\\\\.\\\\d\\+/,
   },
 }

ghost/core/test/e2e-api/admin/explore.test.js

@@ -1,12 +1,12 @@
 const {agentProvider, fixtureManager, matchers} = require('../../utils/e2e-framework');
-const {anyEtag, anyISODate, anyISODateTime, anyStringNumber, stringMatching} = matchers;
+const {anyEtag, anyISODate, anyISODateTime, anyStringNumber, stringMatching, anyNumber} = matchers;
 
 describe('Explore API', function () {
     let agent;
 
     before(async function () {
         agent = await agentProvider.getAdminAPIAgent();
-        await fixtureManager.init('members');
+        await fixtureManager.init('posts', 'members');
         await agent.loginAsOwner();
     });
 
@@ -18,6 +18,7 @@ describe('Explore API', function () {
                 .matchBodySnapshot({
                     explore: {
                         most_recently_published_at: anyISODateTime,
+                        total_posts_published: anyNumber,
                         mrr_stats: {
                             data: [{
                                 date: anyISODate

ghost/core/test/unit/frontend/helpers/__snapshots__/ghost_head.test.js.snap

@@ -2472,4 +2472,4 @@ Object {
     
     <script defer src=\\"https://cdn.jsdelivr.net/npm/@tryghost/sodo-search@~1.0/umd/sodo-search.min.js\\" data-key=\\"xyz\\" data-styles=\\"https://cdn.jsdelivr.net/npm/@tryghost/sodo-search@~1.0/umd/main.css\\" data-sodo-search=\\"http://localhost:65530/\\" crossorigin=\\"anonymous\\"></script>",
 }
-`;
+`;