Created the link controller

controller/links.ts

@@ -0,0 +1,25 @@
+import {ShortenedLink} from "../models/ShortenedLink";
+
+/**
+ * Gets a link object from an id
+ * @param shortenedId The link id (shortened)
+ */
+export const getLinkById = (shortenedId: string) => ShortenedLink.findOne({shortenedId: shortenedId}, {_id: 0, __v: 0});
+
+/**
+ * Shorts a new link
+ * @param originalUrl The url to short
+ * @param shortenedId The custom id of the link (optional)
+ * @param clientId The client id of the user that created the link
+ */
+export const shortLink = (originalUrl: string, shortenedId: string | undefined, clientId: Number) =>
+    ShortenedLink.create({originalUrl, shortenedId, clientId});
+
+/**
+ * Lists all links created by a specific user
+ * @param clientId The user to get the links from
+ */
+export const listLinksByUser = (clientId: Number) => ShortenedLink.find({clientId}, {_id: 0, __v: 0});
+
+/** Lists all created links from the database */
+export const listAllLinks = () => ShortenedLink.find({}, {_id: 0, __v: 0});