validateAndExecute added to Helpers.kt.

Signed-off-by: Pavel Erokhin (MairwunNx) <MairwunNx@gmail.com>

Author: MairwunNx

src/main/kotlin/com/mairwunnx/projectessentials/spawn/helpers/Helpers.kt

@@ -0,0 +1,23 @@
+package com.mairwunnx.projectessentials.spawn.helpers
+
+import com.mairwunnx.projectessentials.core.api.v1.MESSAGE_MODULE_PREFIX
+import com.mairwunnx.projectessentials.core.api.v1.extensions.getPlayer
+import com.mairwunnx.projectessentials.core.api.v1.messaging.MessagingAPI
+import com.mairwunnx.projectessentials.core.api.v1.permissions.hasPermission
+import com.mojang.brigadier.context.CommandContext
+import net.minecraft.command.CommandSource
+
+inline fun validateAndExecute(
+    context: CommandContext<CommandSource>,
+    node: String,
+    opLevel: Int,
+    crossinline action: (isServer: Boolean) -> Unit
+) = context.getPlayer()?.let {
+    if (hasPermission(it, node, opLevel)) {
+        action(false)
+    } else {
+        MessagingAPI.sendMessage(
+            context.getPlayer()!!, "${MESSAGE_MODULE_PREFIX}spawn.restricted"
+        )
+    }
+} ?: run { action(true) }