From bfd7f4cf7bcd4785ecef8420dcb65e4ecb52558b Mon Sep 17 00:00:00 2001
From: Pierre HUBERT <pierre.git@communiquons.org>
Date: Sat, 4 Jan 2020 10:27:54 +0100
Subject: [PATCH] Can get the posts of a group

---
 src/controllers/PostsController.ts | 26 ++++++++++++++++
 src/controllers/Routes.ts          |  2 ++
 src/helpers/GroupsHelper.ts        |  5 +++
 src/helpers/PostsHelper.ts         | 50 ++++++++++++++++++++++++++++++
 4 files changed, 83 insertions(+)

diff --git a/src/controllers/PostsController.ts b/src/controllers/PostsController.ts
index 700a321..35752d6 100644
--- a/src/controllers/PostsController.ts
+++ b/src/controllers/PostsController.ts
@@ -9,6 +9,7 @@ import { SurveyController } from "./SurveyController";
 import { LikesHelper, LikesType } from "../helpers/LikesHelper";
 import { CommentsHelper } from "../helpers/CommentsHelper";
 import { CommentsController } from "./CommentsController";
+import { GroupsAccessLevel } from "../entities/Group";
 
 /**
  * Posts controller
@@ -46,6 +47,31 @@ export class PostsController {
 		
 		const posts = await PostsHelper.GetUserPosts(h.optionnalUserID, userID, startFrom);
 
+		await this.SendMultiplePosts(h, posts);
+	}
+
+	/**
+	 * Get the list of posts of a group
+	 * 
+	 * @param h Request handler
+	 */
+	public static async GetListGroup(h: RequestHandler) {
+		const groupID = await h.postGroupIDWithAccess("groupID", GroupsAccessLevel.VIEW_ACCESS);
+		const startFrom = h.postInt("startFrom", 0);
+
+		const posts = await PostsHelper.GetGroupPosts(h.optionnalUserID, groupID, startFrom);
+
+		await this.SendMultiplePosts(h, posts);
+	}
+
+
+	/**
+	 * Send multiple posts to the API
+	 * 
+	 * @param h Request handler
+	 * @param posts The list of post to send
+	 */
+	private static async SendMultiplePosts(h: RequestHandler, posts: Array<Post>) {
 		let list = [];
 		for (const p of posts) {
 			list.push(await this.PostToAPI(h, p));
diff --git a/src/controllers/Routes.ts b/src/controllers/Routes.ts
index 2c19b32..167b13f 100644
--- a/src/controllers/Routes.ts
+++ b/src/controllers/Routes.ts
@@ -186,6 +186,8 @@ export const Routes : Route[] = [
 	// Posts controller
 	{path: "/posts/get_user", cb: (h) => PostsController.GetListUser(h), needLogin: false},
 
+	{path: "/posts/get_group", cb: (h) => PostsController.GetListGroup(h), needLogin: false},
+
 
 
 	// Notifications controller
diff --git a/src/helpers/GroupsHelper.ts b/src/helpers/GroupsHelper.ts
index 143a9d5..f9814cf 100644
--- a/src/helpers/GroupsHelper.ts
+++ b/src/helpers/GroupsHelper.ts
@@ -304,6 +304,11 @@ export class GroupsHelper {
 	 * @param userID The ID of target user
 	 */
 	public static async GetMembershipLevel(groupID: number, userID: number) : Promise<GroupMembershipLevels> {
+		
+		// If the user is not signed in
+		if(userID < 1)
+			return GroupMembershipLevels.VISITOR;
+		
 		const result = await DatabaseHelper.Query({
 			table: GROUPS_MEMBERS_TABLE,
 			where: {
diff --git a/src/helpers/PostsHelper.ts b/src/helpers/PostsHelper.ts
index daef716..19d0e5d 100644
--- a/src/helpers/PostsHelper.ts
+++ b/src/helpers/PostsHelper.ts
@@ -108,6 +108,56 @@ export class PostsHelper {
 		return entries.map((r) => this.DBToPost(r));
 	}
 
+	/**
+	 * Get the posts of a group
+	 * 
+	 * @param userID The ID of the user making the request
+	 * @param groupID The ID of the target group
+	 * @param startFrom Start point. 0 for none
+	 */
+	public static async GetGroupPosts(userID: number, groupID: number, 
+		startFrom: number = 0, limit: number = 10) : Promise<Array<Post>> {
+
+		if(limit < 1)
+			throw new Error("Limit (" + limit +") is invalid!");
+
+		// Check membership of the user
+		const membership = await GroupsHelper.GetMembershipLevel(groupID, userID);
+		const canSeeAllPosts = membership <= GroupMembershipLevels.MEMBER;
+
+		const visibilityLevel = canSeeAllPosts ? PostVisibilityLevel.VISIBILITY_GROUP_MEMBERS : PostVisibilityLevel.VISIBILITY_PUBLIC;
+		
+
+		// Prepare request
+
+		// === VISIBILITY RESTRICTION ===
+		let customWhere = "(niveau_visibilite <= ?)";
+		let customWhereArgs = [visibilityLevel.toString()];
+		// == /VISIBILITY RESTRICTION ===
+
+
+		// === START POINT ===
+		if(startFrom != 0) {
+			customWhere += " AND ID <= ?";
+			customWhereArgs.push(startFrom.toString());
+		}
+		// == /START POINT ===
+
+
+		const results = await DatabaseHelper.Query({
+			table: TABLE_NAME,
+			where: {
+				group_id: groupID
+			},
+			customWhere: customWhere,
+			customWhereArgs: customWhereArgs,
+			order: "ID DESC",
+			limit: limit
+		});
+
+		return results.map((r) => this.DBToPost(r));
+	}
+
 	/**
 	 * Get the access level of a user over a post
 	 *