feat: post global chat messages to discord

Plugin.cs

@@ -5,9 +5,11 @@
 using BepInEx.Logging;
 using BepInEx.Unity.IL2CPP;
 using Bloodstone.API;
+using Bloodstone.Hooks;
 using HarmonyLib;
 using Il2CppInterop.Runtime.Injection;
 using UnityEngine;
+using v_rising_discord_bot_companion.chat;
 using v_rising_discord_bot_companion.query;
 
 namespace v_rising_discord_bot_companion;
@@ -24,6 +26,9 @@ public class Plugin : BasePlugin {
 
     private PluginConfig? _pluginConfig;
     private ConfigEntry<string> _basicAuthUsers;
+    private ConfigEntry<string?> _discordWebhookUrl;
+    private ConfigEntry<string> _discordWebhookUsername;
+    private ConfigEntry<string> _discordWebhookAvatarUrl;
 
     public Plugin() {
 
@@ -36,6 +41,24 @@ public Plugin() {
             "",
             "A list of comma separated username:password entries that are allowed to query the HTTP API."
         );
+        _discordWebhookUrl = Config.Bind<string?>(
+            "Discord",
+            "WebhookUrl",
+            null,
+            "The discord webhook url to post chat messages to."
+        );
+        _discordWebhookUsername = Config.Bind<string>(
+            "Discord",
+            "WebhookUsername",
+            "Jarvis",
+            "The username to use when posting messages to discord."
+        );
+        _discordWebhookAvatarUrl = Config.Bind(
+            "Discord",
+            "WebhookAvatarUrl",
+            "https://raw.githubusercontent.com/DarkAtra/v-rising-discord-bot/main/docs/assets/icon.png",
+            "The url to the avatar image for the discord webhook."
+        );
     }
 
     public override void Load() {
@@ -45,7 +68,6 @@ public override void Load() {
             return;
         }
 
-
         // Plugin startup logic
         Log.LogInfo($"Plugin {MyPluginInfo.PLUGIN_GUID} version {MyPluginInfo.PLUGIN_VERSION} is loaded!");
 
@@ -56,9 +78,17 @@ public override void Load() {
         // Harmony patching
         _harmony = new Harmony(MyPluginInfo.PLUGIN_GUID);
         _harmony.PatchAll(Assembly.GetExecutingAssembly());
+
+        if (GetPluginConfig().DiscordWebhookUrl != null) {
+            Logger.LogInfo("Configuring DiscordChatSystem.");
+            Chat.OnChatMessage += DiscordChatSystem.HandleChatEvent;
+        }
     }
 
     public override bool Unload() {
+        if (_pluginConfig?.DiscordWebhookUrl != null) {
+            Chat.OnChatMessage -= DiscordChatSystem.HandleChatEvent;
+        }
         _harmony?.UnpatchSelf();
         if (_queryDispatcher != null) {
             Object.Destroy(_queryDispatcher);
@@ -88,7 +118,10 @@ private PluginConfig ParsePluginConfig() {
         }
 
         return new PluginConfig(
-            BasicAuthUsers: basicAuthUsers
+            BasicAuthUsers: basicAuthUsers,
+            DiscordWebhookUrl: _discordWebhookUrl.Value,
+            DiscordWebhookUsername: _discordWebhookUsername.Value,
+            DiscordWebhookAvatarUrl: _discordWebhookAvatarUrl.Value
         );
     }
 }

PluginConfig.cs

@@ -3,7 +3,10 @@
 namespace v_rising_discord_bot_companion;
 
 public readonly record struct PluginConfig(
-    List<BasicAuthUser> BasicAuthUsers
+    List<BasicAuthUser> BasicAuthUsers,
+    string? DiscordWebhookUrl,
+    string DiscordWebhookUsername,
+    string DiscordWebhookAvatarUrl
 );
 
 public readonly record struct BasicAuthUser(

chat/DiscordChatSystem.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Net;
+using System.Net.Http;
+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Bloodstone.Hooks;
+using ProjectM.Network;
+
+namespace v_rising_discord_bot_companion.chat;
+
+public class DiscordChatSystem {
+
+    private static readonly int MAX_MESSAGE_LENGTH = 2000;
+
+    private static readonly HttpClient _httpClient = new();
+    private static readonly JsonSerializerOptions _serializeOptions = new() {
+        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
+        PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower
+    };
+
+    public static void HandleChatEvent(VChatEvent vChatEvent) {
+
+        var pluginConfig = Plugin.Instance.GetPluginConfig();
+        var discordWebhookUrl = pluginConfig.DiscordWebhookUrl;
+        if (discordWebhookUrl == null || vChatEvent.Type != ChatMessageType.Global) {
+            return;
+        }
+
+        try {
+
+            var webhookRequestPayload = new DiscordWebhookRequestPayload(
+                Username: pluginConfig.DiscordWebhookUsername,
+                AvatarUrl: pluginConfig.DiscordWebhookAvatarUrl,
+                Content: $"{vChatEvent.User.CharacterName}: {vChatEvent.Message.Substring(0, Math.Min(vChatEvent.Message.Length, MAX_MESSAGE_LENGTH - vChatEvent.User.CharacterName.Length))}"
+            );
+
+            var webhookRequest = new HttpRequestMessage(HttpMethod.Post, discordWebhookUrl) {
+                Content = new StringContent(
+                    JsonSerializer.Serialize(webhookRequestPayload, _serializeOptions),
+                    Encoding.UTF8,
+                    "application/json"
+                )
+            };
+
+            var response = _httpClient.Send(webhookRequest);
+            if (response.StatusCode != HttpStatusCode.NoContent) {
+                Plugin.Logger.LogError($"Discord webhook responded with unexpected status code '{response.StatusCode}' - please check your configuration");
+            }
+        } catch (Exception e) {
+            Plugin.Logger.LogError($"Exception calling discord webhook: {e.Message}");
+        }
+    }
+}

chat/DiscordWebhookRequestPayload.cs

@@ -0,0 +1,7 @@
+namespace v_rising_discord_bot_companion.chat;
+
+public readonly record struct DiscordWebhookRequestPayload(
+    string Username,
+    string Content,
+    string AvatarUrl
+);

http-requests.http

@@ -34,3 +34,13 @@ POST http://localhost:25570/api/save/v1
 Content-Type: application/json
 
 {}
+
+### Discord Webhook
+POST https://discord.com/api/webhooks/xxx/xxx
+Content-Type: application/json
+
+{
+    "username": "Jarvis",
+    "avatar_url": "https://raw.githubusercontent.com/DarkAtra/v-rising-discord-bot/main/docs/assets/icon.png",
+    "content": "Atra: Test"
+}

v-rising-discord-bot-companion.csproj

@@ -4,7 +4,7 @@
         <Description>A companion mod for DarkAtra/v-rising-discord-bot.</Description>
         <Version>0.4.1</Version>
 
-        <TargetFramework>net6.0</TargetFramework>
+        <TargetFramework>net8.0</TargetFramework>
         <LangVersion>latest</LangVersion>
         <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
         <Nullable>enable</Nullable>