From 3eac46ac55eb72cdf657bc625b8ac3ac26694655 Mon Sep 17 00:00:00 2001
From: Pierre HUBERT <pierre.git@communiquons.org>
Date: Sat, 21 Mar 2020 14:45:03 +0100
Subject: [PATCH] Like system is working

---
 src/controllers/LikesController.ts | 60 +++++++++++++++++++++++++++++-
 src/helpers/LikesHelper.ts         | 37 ++++++++++++++++++
 2 files changed, 96 insertions(+), 1 deletion(-)

diff --git a/src/controllers/LikesController.ts b/src/controllers/LikesController.ts
index d2967ff..da119ec 100644
--- a/src/controllers/LikesController.ts
+++ b/src/controllers/LikesController.ts
@@ -1,4 +1,7 @@
 import { RequestHandler } from "../entities/RequestHandler";
+import { LikesType, LikesHelper } from "../helpers/LikesHelper";
+import { UserHelper } from "../helpers/UserHelper";
+import { GroupsAccessLevel } from "../entities/Group";
 
 /**
  * Likes controller
@@ -13,7 +16,62 @@ export class LikesController {
 	 * @param h Request handler
 	 */
 	public static async Update(h: RequestHandler) {
-		// TODO : implement
+		const req_type = h.postString("type");
+		const is_linking = h.postBool("like");
+
+		let id: number;
+		let type: LikesType;
+
+		switch(req_type) {
+
+			// In case of user
+			case "user":
+				id = await h.postUserId("id");
+				type = LikesType.USER;
+
+				if(!await UserHelper.CanSeeUserPage(h.getUserId(), id))
+					h.error(401, "You cannot access this user information!")
+				
+				break;
+			
+			
+			// In case of post
+			case "post":
+				id = await h.postPostIDWithAccess("id");
+				type = LikesType.POST;
+			
+				// TODO : delete any notification targetting this user about the post
+				
+				break;
+			
+			
+			// In case of comment
+			case "comment":
+				id = await h.postCommentIDWithAccess("id");
+				type = LikesType.COMMENT;
+				break;
+			
+			
+			// In case of group
+			case "group":
+				id = await h.postGroupIDWithAccess("id", GroupsAccessLevel.VIEW_ACCESS);
+				type = LikesType.GROUP;
+				break;
+			
+			
+			// Default case : throw an error
+			default:
+				throw Error("Unsupported like type : "+req_type+" !");
+
+		}
+
+
+		// Update like status
+		await LikesHelper.Update(h.getUserId(), is_linking, id, type);
+
+
+		h.success();
+
 	}
 
 }
\ No newline at end of file
diff --git a/src/helpers/LikesHelper.ts b/src/helpers/LikesHelper.ts
index 80c4b3c..b8506df 100644
--- a/src/helpers/LikesHelper.ts
+++ b/src/helpers/LikesHelper.ts
@@ -1,4 +1,5 @@
 import { DatabaseHelper } from "./DatabaseHelper";
+import { mysql_date } from "../utils/DateUtils";
 
 /**
  * Likes helper
@@ -70,6 +71,42 @@ export class LikesHelper {
 		}) == 1;
 	}
 
+	/**
+	 * Update like status
+	 * 
+	 * @param userID The ID of the user updating like status
+	 * @param isLiking New like status of the user
+	 * @param id The ID of the component element to update
+	 * @param kind The kind of the element
+	 */
+	public static async Update(userID: number, isLiking: boolean, id: number, kind: LikesType) {
+
+		// If not liking anymore
+		if(!isLiking) {
+			await DatabaseHelper.DeleteRows(LIKES_TABLE, {
+				ID_personne: userID,
+				ID_type: id,
+				type: LikesKindsDB[kind]
+			})
+
+			return;
+		}
+
+		// Else we make the user liking the element
+
+		// Check if the user is already liking the element
+		if(await this.IsLiking(userID, id, kind))
+			return;
+		
+		// Insert in the database
+		await DatabaseHelper.InsertRow(LIKES_TABLE, {
+			ID_personne: userID,
+			ID_type: id,
+			Date_envoi: mysql_date(),
+			type: LikesKindsDB[kind]
+		});
+	}
+
 	/**
 	 * Delete all the likes related to an element
 	 *