Send uncaught errors to bot owner via DM

src/main/kotlin/moe/kageru/kagebot/Kagebot.kt

@@ -1,6 +1,7 @@
 package moe.kageru.kagebot
 
 import moe.kageru.kagebot.Log.log
+import moe.kageru.kagebot.Util.checked
 import moe.kageru.kagebot.config.Config
 import moe.kageru.kagebot.config.RawConfig
 import org.javacord.api.DiscordApiBuilder
@@ -46,7 +47,7 @@ class Kagebot {
         try {
             Globals.config = Config(RawConfig.read())
         } catch (e: IllegalArgumentException) {
-            println("Config error:\n$e,\n${e.message},\n${e.stackTrace}")
+            println("Config error:\n$e,\n${e.message},\n${e.stackTrace.joinToString("\n")}")
             System.exit(1)
         }
         Runtime.getRuntime().addShutdownHook(Thread {
@@ -54,10 +55,12 @@ class Kagebot {
             Globals.api.disconnect()
         })
         log.info("kagebot Mk II running")
-        Globals.api.addMessageCreateListener { processMessage(it) }
+        Globals.api.addMessageCreateListener { checked { processMessage(it) } }
         Globals.config.features.welcome?.let { welcome ->
             if (welcome.enabled) {
-                Globals.api.addServerMemberJoinListener { welcomeUser(it) }
+                Globals.api.addServerMemberJoinListener {
+                    checked { welcomeUser(it) }
+                }
             }
         }
     }

src/main/kotlin/moe/kageru/kagebot/Util.kt

@@ -2,9 +2,12 @@ package moe.kageru.kagebot
 
 import moe.kageru.kagebot.Globals.api
 import moe.kageru.kagebot.Globals.server
+import moe.kageru.kagebot.Log.log
 import org.javacord.api.entity.channel.TextChannel
 import org.javacord.api.entity.message.MessageAuthor
+import org.javacord.api.entity.message.embed.EmbedBuilder
 import org.javacord.api.entity.permission.Role
+import java.awt.Color
 import java.util.*
 import java.util.concurrent.CompletableFuture
 import java.util.concurrent.CompletionException
@@ -80,4 +83,23 @@ object Util {
             }
         }
     }
+
+    inline fun checked(op: (() -> Unit)) {
+        try {
+            op()
+        } catch (e: Exception) {
+            log.warning("An uncaught exception occurred.\n$e")
+            Globals.api.owner.get().sendMessage(
+                EmbedBuilder()
+                    .setTimestampToNow()
+                    .setColor(Color.RED)
+                    .addField("Error", "kagebot has encountered an error")
+                    .addField(
+                        "$e", """```
+                       ${e.stackTrace.joinToString("\n")}
+                    ```""".trimIndent()
+                    )
+            )
+        }
+    }
 }

src/main/kotlin/moe/kageru/kagebot/command/Command.kt

@@ -18,7 +18,7 @@ class Command(cmd: RawCommand) {
     val regex: Regex?
 
     init {
-        trigger = cmd.trigger!!
+        trigger = cmd.trigger ?: throw IllegalArgumentException("Every command must have a trigger.")
         response = cmd.response
         matchType = cmd.matchType?.let { type ->
             MatchType.values().find { it.name.equals(type, ignoreCase = true) }

src/main/kotlin/moe/kageru/kagebot/main.kt

@@ -1,10 +1,5 @@
 package moe.kageru.kagebot
 
 fun main() {
-    //try {
     Kagebot()
-    /*} catch (e: Exception) {
-        log.warning("An exception occurred in the main thread, exiting.\n${e.stackTrace.joinToString("\n")}")
-        System.exit(1)
-    }*/
 }