Cleaned up LinkRedirectsService

no issue

ghost/link-redirects/lib/LinkRedirectsService.js

@@ -34,26 +34,29 @@ class LinkRedirectsService {
     }
 
     /**
-     * Get a unique slug for a redirect which hasn't already been taken
+     * Get a unique URL with slug for creating unique redirects
      *
-     * @returns {Promise<string>}
+     * @returns {Promise<URL>}
      */
-    async getSlug() {
-        return crypto.randomBytes(4).toString('hex');
+    async getSlugUrl() {
+        let url;
+        while (!url || await this.#linkRedirectRepository.getByURL(url)) {
+            const slug = crypto.randomBytes(4).toString('hex');
+            url = new URL(`r/${slug}`, this.#baseURL);
+        }
+        return url;
     }
 
     /**
+     * @param {URL} from
      * @param {URL} to
-     * @param {string} slug
      *
      * @returns {Promise<LinkRedirect>}
      */
-    async addRedirect(to, slug) {
-        const from = new URL(`r/${slug}`, this.#baseURL);
-
+    async addRedirect(from, to) {
         const link = new LinkRedirect({
-            to,
-            from
+            from,
+            to
         });
 
         await this.#linkRedirectRepository.save(link);

ghost/link-tracking/lib/LinkClickTrackingService.js

@@ -28,11 +28,6 @@ const ObjectID = require('bson-objectid').default;
  * @prop {({filter: string}) => Promise<ILinkRedirect[]>} getAll
  */
 
-/**
- * @typedef {object} ILinkClickTrackingService
- * @prop {(link: ILinkRedirect, uuid: string) => Promise<URL>} addTrackingToRedirect
- */
-
 /**
  * @typedef {object} IPostLinkRepository
  * @prop {(postLink: PostLink) => Promise<void>} save
@@ -85,10 +80,10 @@ class LinkClickTrackingService {
      */
     async addRedirectToUrl(url, post) {
         // Generate a unique redirect slug
-        const slug = await this.#linkRedirectService.getSlug();
+        const slugUrl = await this.#linkRedirectService.getSlugUrl();
 
         // Add redirect for link click tracking
-        const redirect = await this.#linkRedirectService.addRedirect(url, slug);
+        const redirect = await this.#linkRedirectService.addRedirect(slugUrl, url);
 
         // Store a reference of the link against the post
         const postLink = new PostLink({