From 25159e37185f7af0aa2cc1d98d80926d48f5f525 Mon Sep 17 00:00:00 2001
From: Pierre HUBERT <pierre.git@communiquons.org>
Date: Sat, 4 Jan 2020 11:30:33 +0100
Subject: [PATCH] Get the latest posts of the user

---
 src/controllers/PostsController.ts | 14 ++++++
 src/controllers/Routes.ts          |  2 +
 src/helpers/FriendsHelper.ts       |  4 +-
 src/helpers/GroupsHelper.ts        |  6 ++-
 src/helpers/PostsHelper.ts         | 72 ++++++++++++++++++++++++++++++
 5 files changed, 95 insertions(+), 3 deletions(-)

diff --git a/src/controllers/PostsController.ts b/src/controllers/PostsController.ts
index 35752d6..0fe50dc 100644
--- a/src/controllers/PostsController.ts
+++ b/src/controllers/PostsController.ts
@@ -64,6 +64,20 @@ export class PostsController {
 		await this.SendMultiplePosts(h, posts);
 	}
 
+	/**
+	 * Get the list of latest posts
+	 * 
+	 * @param h Request handler
+	 */
+	public static async GetLatest(h: RequestHandler) {
+		const startFrom = h.postInt("startFrom", 0);
+		const includeGroups = h.postBool('include_groups', false);
+
+		const posts = await PostsHelper.GetLatest(h.getUserId(), startFrom, 10, includeGroups);
+
+		await this.SendMultiplePosts(h, posts);
+	}
+
 
 	/**
 	 * Send multiple posts to the API
diff --git a/src/controllers/Routes.ts b/src/controllers/Routes.ts
index 167b13f..8752a40 100644
--- a/src/controllers/Routes.ts
+++ b/src/controllers/Routes.ts
@@ -188,6 +188,8 @@ export const Routes : Route[] = [
 
 	{path: "/posts/get_group", cb: (h) => PostsController.GetListGroup(h), needLogin: false},
 
+	{path: "/posts/get_latest", cb: (h) => PostsController.GetLatest(h)},
+
 
 
 	// Notifications controller
diff --git a/src/helpers/FriendsHelper.ts b/src/helpers/FriendsHelper.ts
index d4681c0..5ff7192 100644
--- a/src/helpers/FriendsHelper.ts
+++ b/src/helpers/FriendsHelper.ts
@@ -16,13 +16,15 @@ export class FriendsHelper {
 	 * Get the list of friends of the user
 	 * 
 	 * @param userID The ID of the user
+	 * @param onlyAccepted Return only accepted friendship
 	 */
-	public static async GetList(userID: number) : Promise<Array<Friend>> {
+	public static async GetList(userID: number, onlyAccepted = false) : Promise<Array<Friend>> {
 		const results = await DatabaseHelper.Query({
 			table: FRIENDS_TABLE + " f",
 			where: {
 				ID_personne: userID,
 			},
+			customWhere: onlyAccepted ? "actif = 1" : "",
 			joins: [
 				{
 					table: USER_TABLE + " u",
diff --git a/src/helpers/GroupsHelper.ts b/src/helpers/GroupsHelper.ts
index f9814cf..82f9b82 100644
--- a/src/helpers/GroupsHelper.ts
+++ b/src/helpers/GroupsHelper.ts
@@ -68,13 +68,15 @@ export class GroupsHelper {
 	 * Get the list of groups of a user
 	 * 
 	 * @param userID Target user ID
+	 * @param onlyFollowed Include only the groups the user follow
 	 */
-	public static async GetListUser(userID: number) : Promise<Array<number>> {
+	public static async GetListUser(userID: number, onlyFollowed: boolean = false) : Promise<Array<number>> {
 		const list = await DatabaseHelper.Query({
 			table: GROUPS_MEMBERS_TABLE,
 			where: {
-				user_id: userID
+				user_id: userID,
 			},
+			customWhere: onlyFollowed ? "following = 1" : "",
 			fields: ["groups_id"]
 		});
 
diff --git a/src/helpers/PostsHelper.ts b/src/helpers/PostsHelper.ts
index dacfef9..352ed96 100644
--- a/src/helpers/PostsHelper.ts
+++ b/src/helpers/PostsHelper.ts
@@ -158,6 +158,78 @@ export class PostsHelper {
 		return results.map((r) => this.DBToPost(r));
 	}
 
+	/**
+	 * Get the latest posts of a user
+	 * 
+	 * @param userID The ID of the user making the request
+	 * @param startFrom Startpoint for the research
+	 * @param limit Limit of the research (default: 10)
+	 * @param includeGroups Specify whether groups can be selected too or not
+	 */
+	public static async GetLatest(userID: number, startFrom: number = 10,
+		limit: number = 10, includeGroups: boolean = false) {
+		
+		if(limit < 1)
+			throw new Error("Limit of the query must be greater than 0!");
+		
+		const visibilityLevel = PostVisibilityLevel.VISIBILITY_FRIENDS;
+
+		// Get the list of friends of the user
+		const friendsList = await FriendsHelper.GetList(userID, true);
+
+		// Prepare the request on the database
+		
+		// === Membership condition === 
+		let customWhere = "(";
+
+		// === FRIENDS POSTS ===
+		customWhere += "(group_id = 0 AND niveau_visibilite <= ? AND (ID_personne = ?";
+		let customWhereArgs = [visibilityLevel.toString(), userID.toString()];
+
+		friendsList.forEach((f) => {
+			customWhere += " OR ID_personne = ?";
+			customWhereArgs.push(f.friendID.toString());
+		});
+
+		customWhere += "))"
+		// === FRIENDS POSTS ===
+
+
+		// === GROUPS POSTS ===
+		if(includeGroups) {
+
+			const groups = await GroupsHelper.GetListUser(userID, true);
+
+			groups.forEach((groupID) => {
+				customWhere += " OR group_id = ? ";
+				customWhereArgs.push(groupID.toString());
+			})
+
+		}
+		// == /GROUPS POSTS ===
+
+		customWhere += ")";
+		// === /Membership condition ===
+
+
+		// === START POINT ===
+		if(startFrom > 0) {
+			customWhere += "AND ID <= ?";
+			customWhereArgs.push(startFrom.toString());
+		}
+		// == /START POINT ===
+
+		const results = await DatabaseHelper.Query({
+			table: TABLE_NAME,
+			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
 	 *