Added dummy delete post API endpoint (#354)

refs [AP-810](https://linear.app/ghost/issue/AP-810/unblock-frontend-work-with-a-mock-deleteid-http-api)

Added a dummy delete post API endpoint that returns a 204 response for the purpose
of enabling the frontend to simulate a delete post action. This logic to be implemented
in this endpoint will be fleshed out at a later time

features/delete-post.feature

@@ -0,0 +1,5 @@
+Feature: Delete a post
+
+  Scenario: Correct response code is returned
+    When an authenticated "delete" request is made to "/.ghost/activitypub/post/123"
+    Then the request is accepted with a 204

features/step_definitions/stepdefs.js

@@ -594,33 +594,38 @@ When('we request the outbox', async function () {
     );
 });
 
-When('an authenticated request is made to {string}', async function (path) {
-    let requestPath = path;
-
-    // If this is a request to the /thread/ endpoint, we need to replace the
-    // object name with the object ID as we don't have a way to know the object
-    // ID ahead of time
-    if (path.includes('/thread/')) {
-        const objectName = path.split('/').pop(); // Object name is the last part of the path
-        const object = this.objects[objectName];
+When(
+    /an authenticated (\"(delete|get|post|put)\"\s)?request is made to "(.*)"/,
+    async function (method, path) {
+        const requestMethod = method || 'get';
+        let requestPath = path;
+
+        // If this is a request to the /thread/ endpoint, we need to replace the
+        // object name with the object ID as we don't have a way to know the object
+        // ID ahead of time
+        if (path.includes('/thread/')) {
+            const objectName = path.split('/').pop(); // Object name is the last part of the path
+            const object = this.objects[objectName];
 
-        if (object) {
-            requestPath = path.replace(
-                objectName,
-                encodeURIComponent(object.id),
-            );
+            if (object) {
+                requestPath = path.replace(
+                    objectName,
+                    encodeURIComponent(object.id),
+                );
+            }
         }
-    }
 
-    this.response = await fetchActivityPub(
-        `http://fake-ghost-activitypub${requestPath}`,
-        {
-            headers: {
-                Accept: 'application/ld+json',
+        this.response = await fetchActivityPub(
+            `http://fake-ghost-activitypub${requestPath}`,
+            {
+                method: requestMethod,
+                headers: {
+                    Accept: 'application/ld+json',
+                },
             },
-        },
-    );
-});
+        );
+    },
+);
 
 When('an unauthenticated request is made to {string}', async function (path) {
     this.response = await fetchActivityPub(
@@ -1341,6 +1346,15 @@ Then('the request is accepted', async function () {
     );
 });
 
+Then('the request is accepted with a {int}', function (statusCode) {
+    assert(this.response.ok);
+    assert.equal(
+        this.response.status,
+        statusCode,
+        `Expected status code ${statusCode} - got ${this.response.status}`,
+    );
+});
+
 Then('a {string} activity is in the Outbox', async function (string) {
     const [match, activity, object] = string.match(/(\w+)\((\w+)\)/) || [null];
     if (!match) {

src/app.ts

@@ -93,6 +93,7 @@ import { getTraceContext } from './helpers/context-header';
 import { getSiteSettings } from './helpers/ghost';
 import { getRequestData } from './helpers/request-data';
 import {
+    createDeletePostHandler,
     createGetAccountFollowsHandler,
     createGetAccountHandler,
     createGetFeedHandler,
@@ -939,6 +940,11 @@ app.get(
     requireRole(GhostRole.Owner),
     spanWrapper(createGetFeedHandler(feedService, accountService, 'Inbox')),
 );
+app.delete(
+    '/.ghost/activitypub/post/:uuid',
+    requireRole(GhostRole.Owner),
+    spanWrapper(createDeletePostHandler()),
+);
 /** Federation wire up */
 
 app.use(

src/http/api/index.ts

@@ -2,6 +2,7 @@ export * from './activities';
 export * from './account';
 export * from './feed';
 export * from './note';
+export * from './post';
 export * from './profile';
 export * from './search';
 export * from './thread';

src/http/api/post.ts

@@ -0,0 +1,13 @@
+/**
+ * Create a handler for a request to delete a post
+ */
+export function createDeletePostHandler() {
+    /**
+     * Handle a request to delete a post
+     */
+    return async function handleDeletePost() {
+        return new Response(null, {
+            status: 204,
+        });
+    };
+}