kotlin: implement automatic reconnection to websocket on failure

KotlinPlugin/src/main/kotlin/com/terraocean/plugin/TerraOceanPlugin.kt

@@ -15,6 +15,7 @@ class TerraOceanPlugin: BukkitPlugin() {
         listen(callback = ::onPlayerMovement)
 
         schedule(async = true) {
+            instance.info("establishing connection to ${Settings.socketURL}...")
             establishConnection()
         }
     }

KotlinPlugin/src/main/kotlin/com/terraocean/plugin/bridge/WebSocket.kt

@@ -4,6 +4,7 @@ import com.terraocean.plugin.Settings
 import com.terraocean.plugin.Strings
 import com.terraocean.plugin.instance
 import hazae41.minecraft.kutils.bukkit.info
+import hazae41.minecraft.kutils.bukkit.schedule
 import hazae41.minecraft.kutils.bukkit.warning
 import okhttp3.*
 import org.bukkit.Bukkit
@@ -13,14 +14,13 @@ val client = OkHttpClient.Builder()
     .readTimeout(0, TimeUnit.MILLISECONDS)
     .build()
 
-lateinit var socket: WebSocket
-
-fun establishConnection() {
-    instance.info("establishing connection to ${Settings.socketURL}...")
-    val request = Request.Builder()
+private var request = Request.Builder()
     .url(Settings.socketURL)
     .build()
+lateinit var socket: WebSocket
+var wsFails = 0
 
+fun establishConnection() {
     socket = client.newWebSocket(request, WSListener())
 }
 
@@ -67,9 +67,17 @@ class WSListener: WebSocketListener() {
 
     override fun onOpen(webSocket: WebSocket, response: Response) {
         instance.info("Socket connection established to $response.")
+        wsFails = 0
     }
 
     override fun onFailure(webSocket: WebSocket, t: Throwable, response: Response?) {
-        TODO("Automatic reconnection")
+        if (wsFails < 5) {
+            wsFails++
+            instance.warning("WS Fail: ${t.message}")
+            instance.info("Reconnecting to socket...")
+        }
+        instance.schedule(delay = 5, unit = TimeUnit.SECONDS) {
+            establishConnection()
+        }
     }
 }