fix crash

src/main/kotlin/de/wulkanat/AdminCli.kt

@@ -3,14 +3,18 @@ package de.wulkanat
 import de.wulkanat.model.BlogPostPreview
 import net.dv8tion.jda.api.hooks.ListenerAdapter
 import de.wulkanat.web.SiteWatcher
+import net.dv8tion.jda.api.EmbedBuilder
 import net.dv8tion.jda.api.events.message.priv.PrivateMessageReceivedEvent
+import java.awt.Color
 import kotlin.system.exitProcess
 
 class AdminCli : ListenerAdapter() {
+    val prefix = "!"
+
     override fun onPrivateMessageReceived(event: PrivateMessageReceivedEvent) {
         val msg = event.message.contentRaw
         if (event.author.idLong != Admin.userId ||
-            !msg.startsWith("!")
+            !msg.startsWith(prefix)
         ) {
             return
         }
@@ -45,6 +49,43 @@ class AdminCli : ListenerAdapter() {
                 Channels.serviceChannels = Channels.refreshServiceChannelsFromDisk()
                 Admin.info()
             }
+            "removeInactive" -> {
+                Channels.channels.removeAll { channel ->
+                    Channels.testServerId(channel.id) ?: run {
+                        Admin.println("Removed ${channel.id}")
+                        null
+                    } == null
+                }
+                Admin.info()
+                Channels.saveChannels()
+            }
+            "help" -> {
+                event.message.channel.sendMessage(
+                    EmbedBuilder()
+                        .setTitle("Help")
+                        .setColor(Color.YELLOW)
+                        .setAuthor(Admin.admin?.name, Admin.admin?.avatarUrl, Admin.admin?.avatarUrl)
+                        .setDescription(
+                            """
+                            **${prefix}stop**
+                            Stop the bot
+                            **${prefix}fakeUpdate**
+                            Post a fake update to every registered channel (can be used if bot missed the update)
+                            **${prefix}info**
+                            Show an overview over all registered channels
+                            **${prefix}serviceMessage [title] [message]**
+                            Show a service message (update info etc) to all registered service channels
+                            **${prefix}refreshList**
+                            Refresh server list from disk
+                            **${prefix}removeInactive**
+                            Remove inactive channels
+                            **${prefix}help**
+                            Show this message
+                        """.trimIndent()
+                        )
+                        .build()
+                ).queue()
+            }
         }
     }
 }

src/main/kotlin/de/wulkanat/Channels.kt

@@ -1,15 +1,12 @@
 package de.wulkanat
 
 import de.wulkanat.extensions.crosspost
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
 import kotlinx.serialization.list
 import net.dv8tion.jda.api.EmbedBuilder
 import net.dv8tion.jda.api.JDA
 import net.dv8tion.jda.api.Permission
 import net.dv8tion.jda.api.entities.MessageEmbed
 import net.dv8tion.jda.api.entities.TextChannel
-import net.dv8tion.jda.api.exceptions.ErrorResponseException
 import java.awt.Color
 
 object Channels {
@@ -53,8 +50,8 @@ object Channels {
                         it.crosspost().queue()
                     }
                 }
-            } catch (e: ErrorResponseException) {
-                Admin.error("Error in server", e.message ?: e.localizedMessage)
+            } catch (e: Exception) {
+                Admin.error("Error in server ${channel_pair.id}", e.message ?: e.localizedMessage)
             }
         }
     }