Add crash info

src/main/kotlin/com/dominikkorsa/discordintegration/DiscordIntegration.kt

@@ -34,6 +34,7 @@ class DiscordIntegration: JavaPlugin() {
     val discordFormatter = DiscordFormatter(this)
     val minecraftFormatter = MinecraftFormatter(this)
     val avatarService = AvatarService(this)
+    val lockFileService = LockFileService(this)
     lateinit var configManager: ConfigManager
     lateinit var messageManager: MessageManager
     private var activityJob: Job? = null
@@ -45,11 +46,15 @@ class DiscordIntegration: JavaPlugin() {
         messageManager = MessageManager(this)
         initCommands()
         registerEvents()
-        this.launchAsync { connect(true) }
+        this.launchAsync {
+            connect(true)
+            lockFileService.start()
+        }
     }
 
     override fun onDisable() {
         super.onDisable()
+        lockFileService.stop()
         runBlocking {
             withTimeout(Duration.ofSeconds(5)) {
                 disconnect(true)
@@ -86,7 +91,9 @@ class DiscordIntegration: JavaPlugin() {
         client.disconnect()
     }
 
-    suspend fun reconnect() {
+    suspend fun reload() {
+        configManager.reload()
+        messageManager.reload()
         connectionLock.withLock {
             disconnect(false)
             connect(false)

src/main/kotlin/com/dominikkorsa/discordintegration/LockFileService.kt

@@ -0,0 +1,60 @@
+package com.dominikkorsa.discordintegration
+
+import com.github.shynixn.mccoroutine.launchAsync
+import discord4j.core.spec.EmbedCreateSpec
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.time.delay
+import java.time.Duration
+import java.util.*
+
+class LockFileService(private val plugin: DiscordIntegration) {
+    private var job: Job? = null
+    private val file = plugin.dataFolder.resolve("lock.txt")
+
+    suspend fun start() {
+        readFile()?.let { notifyCrashed(it) }
+        job = plugin.launchAsync {
+            while (isActive) {
+                updateFile()
+                delay(Duration.ofSeconds(15))
+            }
+        }
+    }
+
+    fun stop() {
+        job?.cancel()
+        job = null
+        file.delete()
+    }
+
+    private fun readFile(): Long? {
+        if (!file.exists()) return null
+        return file.readText().toLong()
+    }
+
+    private fun updateFile() {
+        file.writeText(Date().time.toString())
+    }
+
+    private suspend fun notifyCrashed(timestamp: Long) {
+        if (!plugin.configManager.crashEmbed.enabled) return
+        val webhookBuilder = plugin.client.getWebhookBuilder()
+        plugin.client.sendWebhook(
+            webhookBuilder
+                .addEmbed(
+                    EmbedCreateSpec.builder()
+                        .title(plugin.messageManager.discordCrashEmbedTitle)
+                        .description(plugin.messageManager.discordCrashEmbedContent)
+                        .addField(
+                            plugin.messageManager.discordCrashEmbedLastOnline,
+                            "<t:${timestamp/1000}>",
+                            false
+                        )
+                        .color(plugin.configManager.crashEmbed.color)
+                        .build()
+                )
+                .build()
+        )
+    }
+}

src/main/kotlin/com/dominikkorsa/discordintegration/command/DiscordIntegrationCommand.kt

@@ -11,11 +11,7 @@ class DiscordIntegrationCommand(val plugin: DiscordIntegration): BaseCommand() {
     @Subcommand("reload")
     @CommandPermission("discordintegration.command.reload")
     fun onReload() {
-        plugin.launchAsync {
-            plugin.configManager.reload()
-            plugin.messageManager.reload()
-            plugin.reconnect()
-        }
+        plugin.launchAsync { plugin.reload() }
     }
 
     @Subcommand("help")

src/main/kotlin/com/dominikkorsa/discordintegration/config/ConfigManager.kt

@@ -44,4 +44,5 @@ class ConfigManager(private val plugin: DiscordIntegration) {
     val joinEmbed get() = getEmbedConfig("chat.join-embed")
     val quitEmbed get() = getEmbedConfig("chat.quit-embed")
     val deathEmbed get() = getEmbedConfig("chat.death-embed")
+    val crashEmbed get() = getEmbedConfig("chat.crash-embed")
 }

src/main/kotlin/com/dominikkorsa/discordintegration/config/MessageManager.kt

@@ -34,6 +34,9 @@ class MessageManager(plugin: DiscordIntegration) {
     val discordDeath get() = getString("discord.death")
     val discordDeathFallback get() = getString("discord.death-fallback")
     val discordDeathEmbedTitle get() = getString("discord.death-embed-title")
+    val discordCrashEmbedTitle get() = getString("discord.crash-embed.title")
+    val discordCrashEmbedContent get() = getString("discord.crash-embed.content")
+    val discordCrashEmbedLastOnline get() = getString("discord.crash-embed.last-online")
     val commandsHelpHeader get() = getString("commands.help.header")
     val commandsHelpCommand get() = getString("commands.help.command")
     val commandsUnknown get() = getString("commands.unknown")

src/main/resources/config.yml

@@ -14,6 +14,9 @@ chat:
   death-embed:
     enabled: true
     color: 0xffd166
+  crash-embed:
+    enabled: true
+    color: 0xff8d0a
   player-as-status-author: false
   avatar:
     # Set to true on cracked servers,

src/main/resources/messages.yml

@@ -8,6 +8,13 @@ discord:
   death: '**%death-message%**'
   death-fallback: '**%player% died**'
   death-embed-title: '**%player% died**'
+  crash-embed:
+    title: Server started after crash
+    content: |
+      The previous server process did not exit properly.
+      It might have crashed or have been force stopped.
+      This might also be an error of Discord Integration.
+    last-online: Last online
 minecraft:
   message: '§2%nickname% §7in #%channel-name%§7 » §r%content%'
   tooltip: |
@@ -21,7 +28,7 @@ commands:
       §9§lDiscord Integration help§r
       §9Version: §l%plugin-version%§r
     command: '§9> §r%command% §9- %description%§r'
-  unknown: '§cUnknown command. See avaliable commands using §r/di help'
+  unknown: '§cUnknown command. See available commands using §r/di help'
   descriptions:
     help: 'Show list of plugin commands'
     reload: 'Reload plugin configuration and reconnect'