Added $uptime command, abstracted command registration into core

1.10.2/src/main/kotlin/matterlink/MatterLink.kt

@@ -43,7 +43,7 @@ object MatterLink : IMatterLink() {
 
     @Mod.EventHandler
     fun init(event: FMLInitializationEvent) {
-        BridgeCommandRegistry.registerAll(PlayerListCommand, HelpCommand)
+        this.registerBridgeCommands()
     }
 
     @Mod.EventHandler

1.11.2/src/main/kotlin/matterlink/MatterLink.kt

@@ -43,7 +43,7 @@ object MatterLink : IMatterLink() {
 
     @Mod.EventHandler
     fun init(event: FMLInitializationEvent) {
-        BridgeCommandRegistry.registerAll(PlayerListCommand, HelpCommand)
+       this.registerBridgeCommands()
     }
 
     @Mod.EventHandler

1.12.2/src/main/kotlin/matterlink/MatterLink.kt

@@ -41,7 +41,7 @@ object MatterLink : IMatterLink() {
 
     @Mod.EventHandler
     fun init(event: FMLInitializationEvent) {
-        BridgeCommandRegistry.registerAll(PlayerListCommand, HelpCommand)
+        this.registerBridgeCommands()
     }
 
     @Mod.EventHandler

core/src/main/kotlin/matterlink/IMatterLink.kt

@@ -1,6 +1,10 @@
 package matterlink
 
 import matterlink.bridge.MessageHandler
+import matterlink.bridge.command.BridgeCommandRegistry
+import matterlink.bridge.command.HelpCommand
+import matterlink.bridge.command.PlayerListCommand
+import matterlink.bridge.command.UptimeCommand
 import matterlink.config.cfg
 
 lateinit var instance: IMatterLink
@@ -53,4 +57,8 @@ abstract class IMatterLink {
 
         return "${day}d${hr}hr${min}m${sec}s"
     }
+
+    fun registerBridgeCommands() {
+        BridgeCommandRegistry.registerAll(HelpCommand,PlayerListCommand,UptimeCommand)
+    }
 }

core/src/main/kotlin/matterlink/bridge/command/UptimeCommand.kt

@@ -0,0 +1,21 @@
+package matterlink.bridge.command
+
+import matterlink.bridge.ApiMessage
+import matterlink.bridge.MessageHandler
+import matterlink.config.cfg
+import matterlink.instance
+
+object UptimeCommand : IBridgeCommand {
+    override val name: String = "uptime"
+    override val help: String = "Get server uptime."
+
+    override fun call(args: String): Boolean {
+        if (args.isNotBlank()) return false
+        MessageHandler.transmit(ApiMessage(
+                username = cfg!!.relay.systemUser,
+                text = instance.getUptimeAsString()
+        ))
+        return true
+    }
+
+}