feat: location adapter

src/main/kotlin/cc/modlabs/kpaper/file/gson/LocalDataTypeAdapter.kt

@@ -11,7 +11,6 @@ class LocalDateAdapter : JsonSerializer<LocalDate>, JsonDeserializer<LocalDate>
         typeOfSrc: Type?,
         context: JsonSerializationContext?
     ): JsonElement {
-        // If you don't want null to appear at all, you can handle it differently
         return if (src == null) JsonNull.INSTANCE else JsonPrimitive(src.toString())
     }
 

src/main/kotlin/cc/modlabs/kpaper/file/gson/LocationTypeAdapter.kt

@@ -0,0 +1,35 @@
+package cc.modlabs.kpaper.file.gson
+
+import com.google.gson.*
+import org.bukkit.Bukkit
+import org.bukkit.Location
+import org.bukkit.World
+import java.lang.reflect.Type
+
+class LocationTypeAdapter : JsonSerializer<Location>, JsonDeserializer<Location> {
+    override fun serialize(src: Location, typeOfSrc: Type, context: JsonSerializationContext): JsonElement {
+        val jsonObject = JsonObject()
+        jsonObject.addProperty("world", src.world?.name ?: "world")
+        jsonObject.addProperty("x", src.x)
+        jsonObject.addProperty("y", src.y)
+        jsonObject.addProperty("z", src.z)
+        jsonObject.addProperty("yaw", src.yaw)
+        jsonObject.addProperty("pitch", src.pitch)
+        return jsonObject
+    }
+
+    @Throws(JsonParseException::class)
+    override fun deserialize(json: JsonElement, typeOfT: Type, context: JsonDeserializationContext): Location {
+        val jsonObject = json.asJsonObject
+        val worldName = jsonObject["world"].asString
+        val world: World = Bukkit.getWorld(worldName) ?: throw JsonParseException("World '$worldName' not found")
+
+        val x = jsonObject["x"].asDouble
+        val y = jsonObject["y"].asDouble
+        val z = jsonObject["z"].asDouble
+        val yaw = jsonObject["yaw"].asFloat
+        val pitch = jsonObject["pitch"].asFloat
+
+        return Location(world, x, y, z, yaw, pitch)
+    }
+}