Add extension functions for retrieving worlds by id

Signed-off-by: solonovamax <[email protected]>

silk-core/src/main/kotlin/net/silkmc/silk/core/server/ServerExtensions.kt

@@ -1,7 +1,11 @@
 package net.silkmc.silk.core.server
 
 import net.minecraft.commands.CommandSourceStack
+import net.minecraft.core.registries.Registries
+import net.minecraft.resources.ResourceKey
+import net.minecraft.resources.ResourceLocation
 import net.minecraft.server.MinecraftServer
+import net.minecraft.server.level.ServerLevel
 import net.minecraft.server.level.ServerPlayer
 import java.nio.file.Path
 import kotlin.io.path.absolute
@@ -42,3 +46,37 @@ val MinecraftServer.players: List<ServerPlayer>
 )
 val MinecraftServer.serverPath: Path
     get() = serverDirectory.absolute()
+
+/**
+ * Retrieves the level for an associated with an id is present
+ *
+ * @param id The id of the level to check
+ * @return The level
+ */
+fun MinecraftServer.getLevel(id: ResourceLocation): ServerLevel? = getLevel(ResourceKey.create(Registries.DIMENSION, id))
+
+// alias for yarn
+/**
+ * Retrieves the world for an associated with an id is present
+ *
+ * @param id The id of the world to check
+ * @return The world
+ */
+fun MinecraftServer.getWorld(id: ResourceLocation): ServerLevel? = getLevel(id)
+
+/**
+ * Checks if the level associated with an id is present
+ *
+ * @param id The id of the level to check
+ * @return If the level is present
+ */
+fun MinecraftServer.hasLevel(id: ResourceLocation): Boolean = getLevel(id) != null
+
+// alias for yarn
+/**
+ * Checks if the world associated with an id is present
+ *
+ * @param id The id of the world to check
+ * @return If the world is present
+ */
+fun MinecraftServer.hasWorld(id: ResourceLocation): Boolean = hasLevel(id)