Fix @mention short-circuiting to Cleverbot chat

By design, the bot should trigger Cleverbot any time an @mention
is used and no matching command is found for the invocation.

discordbridge-bukkit/src/main/kotlin/gg/obsidian/discordbridge/wrapper/DbBukkitServer.kt

@@ -9,9 +9,15 @@ import net.md_5.bungee.api.chat.ComponentBuilder
 import net.md_5.bungee.api.chat.HoverEvent
 import org.bukkit.Bukkit
 import org.bukkit.Server
+import org.bukkit.command.Command
+import org.bukkit.command.SimpleCommandMap
+import org.bukkit.plugin.SimplePluginManager
 import java.util.*
+import java.util.logging.Level
 
 class DbBukkitServer(private val plugin: BukkitDiscordBridge, private val bukkitServer: Server) : IDbServer {
+    lateinit var knownCommands: List<String>
+
     override fun broadcastAttachment(att: UrlAttachment) {
         val msg = ComponentBuilder("${att.sender} sent ")
                 .color(net.md_5.bungee.api.ChatColor.ITALIC)
@@ -52,4 +58,28 @@ class DbBukkitServer(private val plugin: BukkitDiscordBridge, private val bukkit
     override fun getLogger(): IDbLogger {
         return DbBukkitLogger(plugin.logger)
     }
+
+    override fun getAllCommandNames(): List<String> {
+        if (::knownCommands.isInitialized)
+            return knownCommands
+        try {
+            val pm = bukkitServer.pluginManager as SimplePluginManager?
+            if (pm != null) {
+                val cmapField = pm::class.java.getDeclaredField("commandMap")
+                cmapField.isAccessible = true
+                val cmap = cmapField.get(pm) as SimpleCommandMap
+                val knownCommandsField = cmap::class.java.getDeclaredField("knownCommands")
+                knownCommandsField.isAccessible = true
+                val kc = (knownCommandsField.get(cmap) as Map<String, Command>).keys.toList()
+                knownCommands = kc
+                return kc
+            }
+            plugin.logger.warning("Could not get command list - plugin manager is null")
+            return listOf()
+        }
+        catch (e: Exception) {
+            plugin.logger.log(Level.WARNING, "Could not get command list", e)
+            return listOf()
+        }
+    }
 }

discordbridge-core/src/main/kotlin/gg/obsidian/discordbridge/command/controller/BotControllerManager.kt

@@ -199,7 +199,9 @@ class BotControllerManager {
 
         if (command == null) {
             // Attempt to run as a server command if sent from Discord
-            if (event is DiscordMessageWrapper && event.originalMessage.member.hasPermission(Permission.ADMINISTRATOR))
+            val knownCommands = DiscordBridge.getServer().getAllCommandNames()
+            if (knownCommands.contains(commandName) && event is DiscordMessageWrapper
+                    && event.originalMessage.member.hasPermission(Permission.ADMINISTRATOR))
                 if (invokeServerCommand(event, args)) return true
 
             if (defaultToTalk) command = commands["talk"]
@@ -371,6 +373,7 @@ class BotControllerManager {
         val sender = DiscordCommandSender(event.senderName, event.channel)
         DiscordBridge.logDebug("Discord user ${event.senderName} invoked Minecraft command '${args.joinToString(" ")}'")
         DiscordBridge.getServer().dispatchCommand(sender, args.joinToString(" "))
+        // TODO
         return true
     }
 

discordbridge-core/src/main/kotlin/gg/obsidian/discordbridge/wrapper/IDbServer.kt

@@ -20,4 +20,7 @@ interface IDbServer {
     fun getPlayer(uuid: UUID): IDbPlayer?
 
     fun getScheduler(): IDbScheduler
+
+    // https://bukkit.org/threads/get-all-the-available-commands.61941/
+    fun getAllCommandNames(): List<String>
 }

discordbridge-forge/src/main/kotlin/gg/obsidian/discordbridge/wrapper/DbForgeServer.kt

@@ -52,4 +52,8 @@ class DbForgeServer(private val mod: ForgeDiscordBridge) : IDbServer {
     override fun getLogger(): DbForgeLogger {
         return DbForgeLogger(mod.logger)
     }
+
+    override fun getAllCommandNames(): List<String> {
+        return FMLCommonHandler.instance().minecraftServerInstance.commandManager.commands.keys.toList()
+    }
 }

discordbridge-sponge/src/main/kotlin/gg/obsidian/discordbridge/wrapper/DbSpongeServer.kt

@@ -54,4 +54,8 @@ class DbSpongeServer(private val plugin: SpongeDiscordBridge, private val game:
     override fun getLogger(): DbSpongeLogger {
         return DbSpongeLogger(plugin.getLogger())
     }
+
+    override fun getAllCommandNames(): List<String> {
+        return Sponge.getCommandManager().aliases.toList()
+    }
 }