API-37: Adding endpoints for climbing route rating app (!16)

Co-authored-by: Patrick Mueller <patrick@mueller-patrick.tech>
Reviewed-on: #16
Co-authored-by: Patrick Müller <patrick@plutodev.de>
Co-committed-by: Patrick Müller <patrick@plutodev.de>

src/models/climbing-route-rating/route_comments/routeComments.service.ts

@@ -0,0 +1,32 @@
+import {ClimbingRouteRatingDB} from '../ClimbingRouteRating.db';
+import {RouteComment} from './RouteComment.interface';
+
+/**
+ * Fetches and returns all comments that belong to the given route
+ * @return Promise<RouteComment[]> The comments
+ */
+export const findByRoute = async (route_id: string): Promise<RouteComment[]> => {
+    let conn = ClimbingRouteRatingDB.getConnection();
+    try {
+        return await conn.query('SELECT comment_id, route_id, comment, timestamp FROM route_comments WHERE route_id = ?', route_id);
+    } catch (err) {
+        throw err;
+    }
+};
+
+/**
+ * Creates a new comment and returns the id of the created comment
+ * @param route_id The id of the route to create the comment for
+ * @param comment The comment
+ * @return number The id of the comment
+ */
+export const createComment = async (route_id: string, comment: string): Promise<number> => {
+    let conn = ClimbingRouteRatingDB.getConnection();
+    try {
+        let res = await conn.query('INSERT INTO route_comments (route_id, comment) VALUES (?, ?) RETURNING comment_id', [route_id, comment]);
+
+        return res[0].comment_id;
+    } catch (err) {
+        throw err;
+    }
+};