Return the number of likes of a group

src/controllers/GroupsController.ts

@@ -3,6 +3,7 @@ import { GroupsHelper } from "../helpers/GroupsHelper";
 import { GroupsAccessLevel, GroupInfo, GroupVisibilityLevel, GroupPostsCreationLevel, GroupRegistrationLevel } from "../entities/Group";
 import { GroupMembershipLevels } from "../entities/GroupMember";
 import { time } from "../utils/DateUtils";
+import { LikesHelper, LikesType } from "../helpers/LikesHelper";
 
 /**
  * Groups API controller
@@ -160,7 +161,7 @@ export class GroupsController {
 			data["description"] = info.hasDescription ? info.description : "null";
 			data["url"] = info.url ? info.hasURL : "null";
 
-			//TODO : add likes information
+			data["number_likes"] = await LikesHelper.Count(info.id, LikesType.GROUP);
 		}
 
 		return data;

src/helpers/LikesHelper.ts

@@ -0,0 +1,52 @@
+import { DatabaseHelper } from "./DatabaseHelper";
+
+/**
+ * Likes helper
+ * 
+ * @author Pierre HUBERT
+ */
+
+/**
+ * Types of likes
+ */
+export enum LikesType {
+	USER = "user",
+	POST = "post",
+	COMMENT = "comment",
+	GROUP = "group"
+}
+
+
+const LIKES_TABLE = "aime";
+
+
+/**
+ * Translation of kinds of likes for the database
+ */
+const LikesKindsDB = [];
+LikesKindsDB[LikesType.USER] = "page";
+LikesKindsDB[LikesType.POST] = "texte";
+LikesKindsDB[LikesType.COMMENT] = "commentaire";
+LikesKindsDB[LikesType.GROUP] = "group";
+
+
+
+export class LikesHelper {
+
+	/**
+	 * Count the number of likes of a specified element
+	 * 
+	 * @param id The ID of the element to count
+	 * @param type The type of the element
+	 */
+	public static async Count(id: number, type: LikesType) : Promise<number> {
+		return DatabaseHelper.Count({
+			table: LIKES_TABLE,
+			where: {
+				ID_type: id,
+				type: LikesKindsDB[type]
+			}
+		})
+	}
+
+}