Start group deletion

src/controllers/GroupsController.ts

@@ -570,8 +570,9 @@ export class GroupsController {
 
 		await h.needUserPostPassword("password");
 
-		// TODO : implement method
-		h.error(500, "Method not implemented yet!");
+		await GroupsHelper.Delete(groupID);
+
+		h.success();
 	}
 
 	/**

src/helpers/GroupsHelper.ts

@@ -6,6 +6,8 @@ import { time } from "../utils/DateUtils";
 import { GroupSettings } from "../entities/GroupSettings";
 import { existsSync, unlinkSync } from "fs";
 import { PostsHelper } from "./PostsHelper";
+import { LikesHelper, LikesType } from "./LikesHelper";
+import { NotificationsHelper } from "./NotificationsHelper";
 
 /**
  * Groups helper
@@ -585,6 +587,28 @@ export class GroupsHelper {
 		return false;
 	}
 
+	/**
+	 * Permanently delete a group
+	 * 
+	 * @param groupID Target group ID
+	 */
+	public static async Delete(groupID: number) {
+
+		// Delete all likes of the group
+		await LikesHelper.DeleteAll(groupID, LikesType.GROUP);
+
+		// Delete the logo of the group
+		await this.DeleteLogo(groupID);
+
+		// Delete all group posts
+		await PostsHelper.DeleteAllGroup(groupID);
+
+		// Delete all group related notifications
+		await NotificationsHelper.DeleteAllRelatedWithGroup(groupID);
+
+		// TODO : continue deletion
+	}
+
 	/**
 	 * Turn a database row into a {GroupInfo} object
 	 * 

src/helpers/NotificationsHelper.ts

@@ -266,6 +266,22 @@ export class NotificationsHelper {
 		}));
 	}
 
+	/**
+	 * Delete all the notifications related with a group
+	 * 
+	 * @param groupID Target group ID
+	 */
+	public static async DeleteAllRelatedWithGroup(groupID: number) {
+		const n = new Notif({
+			onElemType: NotifElemType.GROUP_MEMBERSHIP,
+			onElemID: groupID
+		});
+		await this.Delete(n);
+		
+		n.onElemType = NotifElemType.GROUP_PAGE;
+		await this.Delete(n);
+	}
+
 	/**
 	 * Count the number of unread notifications of a user
 	 * 

src/helpers/PostsHelper.ts

@@ -358,6 +358,22 @@ export class PostsHelper {
 		return list.map((l) => this.DBToPost(l));
 	}
 
+	/**
+	 * Delete all the posts of a given group
+	 * 
+	 * @param groupID Target group ID
+	 */
+	public static async ExportAllPostsGroup(groupID: number) : Promise<Post[]> {
+		const list = await DatabaseHelper.Query({
+			table: TABLE_NAME,
+			where: {
+				group_id: groupID
+			}
+		});
+
+		return list.map((l) => this.DBToPost(l));
+	}
+
 	/**
 	 * Get the access level of a user over a post
 	 * 
@@ -534,6 +550,16 @@ export class PostsHelper {
 		});
 	}
 
+	/**
+	 * Delete all the posts of a given group
+	 * 
+	 * @param groupID Target group ID
+	 */
+	public static async DeleteAllGroup(groupID: number) {
+		for(const post of await this.ExportAllPostsGroup(groupID))
+			await this.Delete(post.id);
+	}
+
 	/**
 	 * Turn a database entry into a row object
 	 *