/
DiscordBot.cs
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/
DiscordBot.cs
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/*
Copyright 2015 MCGalaxy
Dual-licensed under the Educational Community License, Version 2.0 and
the GNU General Public License, Version 3 (the "Licenses"); you may
not use this file except in compliance with the Licenses. You may
obtain a copy of the Licenses at
http://www.opensource.org/licenses/ecl2.php
http://www.gnu.org/licenses/gpl-3.0.html
Unless required by applicable law or agreed to in writing,
software distributed under the Licenses are distributed on an "AS IS"
BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
or implied. See the Licenses for the specific language governing
permissions and limitations under the Licenses.
*/
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using MCGalaxy.Config;
using MCGalaxy.Events.GroupEvents;
using MCGalaxy.Events.PlayerEvents;
using MCGalaxy.Events.ServerEvents;
using MCGalaxy.Util;
namespace MCGalaxy.Modules.Relay.Discord {
public sealed class DiscordBot : RelayBot {
bool disconnected, disconnecting;
DiscordApiClient api;
DiscordWebsocket socket;
string botUserID;
Dictionary<string, bool> isDMChannel = new Dictionary<string, bool>();
List<string> filter_triggers = new List<string>();
List<string> filter_replacements = new List<string>();
public override string RelayName { get { return "Discord"; } }
public override bool Enabled { get { return Config.Enabled; } }
public override bool Connected { get { return socket != null && !disconnected; } }
public DiscordConfig Config;
TextFile replacementsFile = new TextFile("text/discord/replacements.txt",
"// This file is used to replace words/phrases sent to discord",
"// Lines starting with // are ignored",
"// Lines should be formatted like this:",
"// example:http://example.org",
"// That would replace 'example' in messages sent with 'http://example.org'");
void TryReconnect() {
try {
Disconnect("Attempting reconnect");
AutoReconnect();
} catch (Exception ex) {
Logger.LogError("Error reconnecting Discord relay", ex);
}
}
void IOThread() {
try {
socket.Connect();
socket.ReadLoop();
} catch (Exception ex) {
Logger.LogError("Discord relay error", ex);
if (disconnecting || !socket.CanReconnect) return;
// try to recover from dropped connection
TryReconnect();
}
}
protected override void DoConnect() {
// TODO implement properly
socket = new DiscordWebsocket();
disconnecting = false;
disconnected = false;
Channels = Config.Channels.SplitComma();
OpChannels = Config.OpChannels.SplitComma();
socket.Token = Config.BotToken;
socket.GetStatus = GetStatus;
socket.OnReady = HandleReadyEvent;
socket.OnMessageCreate = HandleMessageEvent;
socket.OnChannelCreate = HandleChannelEvent;
Thread worker = new Thread(IOThread);
worker.Name = "DiscordRelayBot";
worker.IsBackground = true;
worker.Start();
}
protected override void DoDisconnect(string reason) {
disconnecting = true;
try {
if (api != null) api.StopAsync();
socket.Disconnect();
} finally {
disconnected = true;
UnregisterEvents();
}
}
public override void ReloadConfig() {
Config.Load();
base.ReloadConfig();
LoadReplacements();
}
protected override void UpdateConfig() {
Channels = Config.Channels.SplitComma();
OpChannels = Config.OpChannels.SplitComma();
IgnoredUsers = Config.IgnoredUsers.SplitComma();
LoadBannedCommands();
}
void LoadReplacements() {
replacementsFile.EnsureExists();
string[] lines = replacementsFile.GetText();
filter_triggers.Clear();
filter_replacements.Clear();
ChatTokens.LoadTokens(lines, (phrase, replacement) =>
{
filter_triggers.Add(phrase);
filter_replacements.Add(replacement);
});
}
public override void LoadControllers() {
Controllers = PlayerList.Load("text/discord/controllers.txt");
}
string GetNick(JsonObject data) {
if (!Config.UseNicks) return null;
object raw;
if (!data.TryGetValue("member", out raw)) return null;
// Make sure this is really a member object first
JsonObject member = raw as JsonObject;
if (member == null) return null;
member.TryGetValue("nick", out raw);
return raw as string;
}
RelayUser ExtractUser(JsonObject data) {
JsonObject author = (JsonObject)data["author"];
string channel = (string)data["channel_id"];
string message = (string)data["content"];
RelayUser user = new RelayUser();
user.Nick = GetNick(data) ?? (string)author["username"];
user.ID = (string)author["id"];
return user;
}
void HandleReadyEvent(JsonObject data) {
JsonObject user = (JsonObject)data["user"];
botUserID = (string)user["id"];
api = new DiscordApiClient();
api.Token = Config.BotToken;
api.RunAsync();
RegisterEvents();
OnReady();
}
void PrintAttachments(JsonObject data, string channel) {
object raw;
if (!data.TryGetValue("attachments", out raw)) return;
JsonArray list = raw as JsonArray;
if (list == null) return;
RelayUser user = ExtractUser(data);
foreach (object entry in list) {
JsonObject attachment = entry as JsonObject;
if (attachment == null) continue;
string url = (string)attachment["url"];
HandleChannelMessage(user, channel, url);
}
}
void HandleMessageEvent(JsonObject data) {
RelayUser user = ExtractUser(data);
// ignore messages from self
if (user.ID == botUserID) return;
string channel = (string)data["channel_id"];
string message = (string)data["content"];
bool isDM;
if (isDMChannel.TryGetValue(channel, out isDM)) {
HandleDirectMessage(user, channel, message);
} else {
HandleChannelMessage(user, channel, message);
PrintAttachments(data, channel);
}
}
void HandleChannelEvent(JsonObject data) {
string channel = (string)data["id"];
string type = (string)data["type"];
if (type == "1") isDMChannel[channel] = true;
}
protected override string ParseMessage(string input) {
StringBuilder sb = new StringBuilder(input);
SimplifyCharacters(sb);
// remove variant selector character used with some emotes
sb.Replace("\uFE0F", "");
return sb.ToString();
}
string GetStatus() {
string online = PlayerInfo.NonHiddenCount().ToString();
return Config.Status.Replace("{PLAYERS}", online);
}
void RegisterEvents() {
OnPlayerConnectEvent.Register(HandlePlayerConnect, Priority.Low);
OnPlayerDisconnectEvent.Register(HandlePlayerDisconnect, Priority.Low);
OnPlayerActionEvent.Register(HandlePlayerAction, Priority.Low);
HookEvents();
}
void UnregisterEvents() {
OnPlayerConnectEvent.Unregister(HandlePlayerConnect);
OnPlayerDisconnectEvent.Unregister(HandlePlayerDisconnect);
OnPlayerActionEvent.Unregister(HandlePlayerAction);
UnhookEvents();
}
void HandlePlayerConnect(Player p) { socket.SendUpdateStatus(); }
void HandlePlayerDisconnect(Player p, string reason) { socket.SendUpdateStatus(); }
protected override void DoSendMessage(string channel, string message) {
if (api == null) return;
api.SendMessageAsync(channel, message);
}
protected override string ConvertMessage(string message) {
message = base.ConvertMessage(message);
message = Colors.StripUsed(message);
return message;
}
readonly string[] markdown_special = { @"\", @"*", @"_", @"~", @"`", @"|" };
readonly string[] markdown_escaped = { @"\\", @"\*", @"\_", @"\~", @"\`", @"\|" };
protected override string PrepareMessage(string message) {
// don't let user use bold/italic etc markdown
for (int i = 0; i < markdown_special.Length; i++) {
message = message.Replace(markdown_special[i], markdown_escaped[i]);
}
// allow uses to do things like replacing '+' with ':green_square:'
for (int i = 0; i < filter_triggers.Count; i++) {
message = message.Replace(filter_triggers[i], filter_replacements[i]);
}
return message;
}
void HandlePlayerAction(Player p, PlayerAction action, string message, bool stealth) {
if (action != PlayerAction.Hide && action != PlayerAction.Unhide) return;
socket.SendUpdateStatus();
}
// all users are already verified by Discord
protected override bool CheckController(string userID, ref string error) { return true; }
protected override string UnescapeFull(Player p) {
return "**" + base.UnescapeFull(p) + "**";
}
protected override string UnescapeNick(Player p) {
return "**" + base.UnescapeNick(p) + "**";
}
static string FormatRank(OnlineListEntry e) {
return string.Format("__{0}__ (`{1}`)",
e.group.GetFormattedName(), e.players.Count);
}
static string FormatNick(Player p, Player pl) {
string flags = OnlineListEntry.GetFlags(pl);
string format = flags.Length > 0 ? "**{0}**_{2}_ (`{1}`)" : "**{0}** (`{1}`)";
return string.Format(format, p.FormatNick(pl), pl.level.name, flags);
}
static string FormatPlayers(Player p, OnlineListEntry e) {
return e.players.Join(pl => FormatNick(p, pl), ", ");
}
protected override void MessagePlayers(RelayPlayer p) {
ChannelSendEmbed embed = new ChannelSendEmbed(p.ChannelID);
int total;
List<OnlineListEntry> entries = PlayerInfo.GetOnlineList(p, p.Rank, out total);
embed.Title = string.Format("{0} player{1} currently online",
total, total.Plural());
foreach (OnlineListEntry e in entries) {
if (e.players.Count == 0) continue;
embed.Fields.Add(
ConvertMessage(FormatRank(e)),
ConvertMessage(FormatPlayers(p, e))
);
}
api.SendAsync(embed);
}
}
}