Can respond to membership invitation

src/helpers/GroupsHelper.ts

@@ -175,6 +175,37 @@ export class GroupsHelper {
 		}));
 	}
 
+	/**
+	 * Check if a user received an invitation to join a group or not
+	 * 
+	 * @param groupID Target group ID
+	 * @param userID Target user ID
+	 */
+	public static async ReceivedInvitation(groupID: number, userID: number) : Promise<boolean> {
+		return await DatabaseHelper.Count({
+			table: GROUPS_MEMBERS_TABLE,
+			where: {
+				groups_id: groupID,
+				user_ID: userID,
+				level: GroupMembershipLevels.INVITED
+			}
+		}) > 0;
+	}
+
+	/**
+	 * Respond to a membership invitation
+	 * 
+	 * @param groupID Target group ID
+	 * @param userID Target user ID
+	 * @param accept true to accept invitation / FALSE else
+	 */
+	public static async RespondInvitation(groupID: number, userID: number, accept: boolean) {
+		if(!accept)
+			await this.DeleteMember(groupID, userID);
+		else
+			await this.UpdateMembershipLevel(groupID, userID, GroupMembershipLevels.MEMBER);
+	}
+
 	/**
 	 * Insert a new group member
 	 * 
@@ -189,6 +220,39 @@ export class GroupsHelper {
 		});
 	}
 
+	/**
+	 * Update a user membership level
+	 * 
+	 * @param groupID Target group ID
+	 * @param userID Target user ID
+	 * @param level New membership level
+	 */
+	public static async UpdateMembershipLevel(groupID: number, userID: number, level: GroupMembershipLevels) {
+		await DatabaseHelper.UpdateRows({
+			table: GROUPS_MEMBERS_TABLE,
+			where: {
+				user_id: userID,
+				groups_id: groupID
+			},
+			set: {
+				level: level
+			}
+		});
+	}
+
+	/**
+	 * Delete completely a user membership
+	 * 
+	 * @param groupID Target group ID
+	 * @param userID Target user ID
+	 */
+	public static async DeleteMember(groupID: number, userID: number) {
+		await DatabaseHelper.DeleteRows(GROUPS_MEMBERS_TABLE, {
+			groups_id: groupID,
+			user_id: userID
+		});
+	}
+
 
 	/**
 	 * Get the membership level of a user for a group