Implement friends list functionality

README.md

@@ -5,12 +5,12 @@ An implementation of osu!bancho in Javascript
 ### Features:
  - Multiplayer + Invites
  - Spectator
- - User Panel (Missing Friends)
+ - User Panel
+ - Friends List
  - Chat & Channels
  - Private Messages
 
 ### Currently unimplemented things:
- - Friends List
  - Bot
  
 ## Bugs:

server/Packets/AddFriend.js

@@ -0,0 +1,5 @@
+const DatabaseHelper = require("../DatabaseHelper.js");
+
+module.exports = function(CurrentUser, FriendToAdd) {
+    DatabaseHelper.getFromDB(`INSERT INTO friends (user, friendsWith) VALUES (${CurrentUser.id}, ${FriendToAdd});`);
+}

server/Packets/RemoveFriend.js

@@ -0,0 +1,5 @@
+const DatabaseHelper = require("../DatabaseHelper.js");
+
+module.exports = function(CurrentUser, FriendToRemove) {
+    DatabaseHelper.getFromDB(`DELETE FROM friends WHERE user = ${CurrentUser.id} AND friendsWith = ${FriendToRemove} LIMIT 1`);
+} 

server/loginHandler.js

@@ -86,8 +86,14 @@ module.exports = function(req, res, loginInfo) {
         osuPacketWriter.ProtocolNegotiation(19);
         // Permission level 4 is osu!supporter
         osuPacketWriter.LoginPermissions(4);
+        // Construct user's friends list
+        const userFriends = DatabaseHelper.getListFromDB(`SELECT friendsWith FROM friends WHERE user = ${userClass.id}`);
+        let friendsArray = [];
+        for (let i = 0; i < userFriends.length; i++) {
+            friendsArray.push(userFriends[i].friendsWith);
+        }
         // Send user's friends list
-        // TODO: friends? Haha, you have no friends!
+        osuPacketWriter.FriendsList(friendsArray);
         // Set title screen image
         osuPacketWriter.TitleUpdate("http://puu.sh/jh7t7/20c04029ad.png|https://osu.ppy.sh/news/123912240253");
 

server/serverHandler.js

@@ -87,6 +87,8 @@ const ChangeAction = require("./Packets/ChangeAction.js"),
       SendPrivateMessage = require("./Packets/SendPrivateMessage.js"),
       Multiplayer = require("./Multiplayer.js"),
       ChannelPart = require("./Packets/ChannelPart.js"),
+      AddFriend = require("./Packets/AddFriend.js"),
+      RemoveFriend = require("./Packets/RemoveFriend.js"),
       UserPresenceBundle = require("./Packets/UserPresenceBundle.js"),
       UserPresence = require("./Packets/UserPresence.js"),
       UserStatsRequest = require("./Packets/UserStatsRequest.js"),
@@ -246,6 +248,14 @@ module.exports = function(req, res) {
                             ChannelPart(userClass, CurrentPacket.data);
                         break;
 
+                        case packetIDs.client_friendAdd:
+                            AddFriend(userClass, CurrentPacket.data);
+                        break;
+
+                        case packetIDs.client_friendRemove:
+                            RemoveFriend(userClass, CurrentPacket.data);
+                        break;
+
                         case packetIDs.client_userStatsRequest:
                             UserStatsRequest(userClass, CurrentPacket.data);
                         break;