Add custom global textures

src/main/kotlin/moe/nea/firmament/features/texturepack/StringMatcher.kt

@@ -6,15 +6,24 @@
 
 package moe.nea.firmament.features.texturepack
 
+import com.google.gson.JsonArray
 import com.google.gson.JsonElement
+import com.google.gson.JsonNull
 import com.google.gson.JsonObject
 import com.google.gson.JsonPrimitive
+import com.google.gson.internal.LazilyParsedNumber
 import java.util.function.Predicate
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
 import net.minecraft.nbt.NbtString
 import net.minecraft.text.Text
 import moe.nea.firmament.util.MC
 import moe.nea.firmament.util.removeColorCodes
 
+@Serializable(with = StringMatcher.Serializer::class)
 interface StringMatcher {
     fun matches(string: String): Boolean
     fun matches(text: Text): Boolean {
@@ -46,7 +55,28 @@ interface StringMatcher {
         }
     }
 
+    object Serializer : KSerializer<StringMatcher> {
+        val delegateSerializer = kotlinx.serialization.json.JsonElement.serializer()
+        override val descriptor: SerialDescriptor
+            get() = SerialDescriptor("StringMatcher", delegateSerializer.descriptor)
+
+        override fun deserialize(decoder: Decoder): StringMatcher {
+            val delegate = decoder.decodeSerializableValue(delegateSerializer)
+            val gsonDelegate = delegate.intoGson()
+            return parse(gsonDelegate)
+        }
+
+        override fun serialize(encoder: Encoder, value: StringMatcher) {
+            encoder.encodeSerializableValue(delegateSerializer, Companion.serialize(value).intoKotlinJson())
+        }
+
+    }
+
     companion object {
+        fun serialize(stringMatcher: StringMatcher):JsonElement {
+            TODO("Cannot serialize string matchers rn")
+        }
+
         fun parse(jsonElement: JsonElement): StringMatcher {
             if (jsonElement is JsonPrimitive) {
                 return Equals(jsonElement.asString, true)
@@ -69,3 +99,58 @@ interface StringMatcher {
         }
     }
 }
+
+fun JsonElement.intoKotlinJson(): kotlinx.serialization.json.JsonElement {
+    when (this) {
+        is JsonNull -> return kotlinx.serialization.json.JsonNull
+        is JsonObject -> {
+            return kotlinx.serialization.json.JsonObject(this.entrySet()
+                                                             .associate { it.key to it.value.intoKotlinJson() })
+        }
+
+        is JsonArray -> {
+            return kotlinx.serialization.json.JsonArray(this.map { it.intoKotlinJson() })
+        }
+
+        is JsonPrimitive -> {
+            if (this.isString)
+                return kotlinx.serialization.json.JsonPrimitive(this.asString)
+            if (this.isBoolean)
+                return kotlinx.serialization.json.JsonPrimitive(this.asBoolean)
+            return kotlinx.serialization.json.JsonPrimitive(this.asNumber)
+        }
+
+        else -> error("Unknown json variant $this")
+    }
+}
+
+fun kotlinx.serialization.json.JsonElement.intoGson(): JsonElement {
+    when (this) {
+        is kotlinx.serialization.json.JsonNull -> return JsonNull.INSTANCE
+        is kotlinx.serialization.json.JsonPrimitive -> {
+            if (this.isString)
+                return JsonPrimitive(this.content)
+            if (this.content == "true")
+                return JsonPrimitive(true)
+            if (this.content == "false")
+                return JsonPrimitive(false)
+            return JsonPrimitive(LazilyParsedNumber(this.content))
+        }
+
+        is kotlinx.serialization.json.JsonObject -> {
+            val obj = JsonObject()
+            for ((k, v) in this) {
+                obj.add(k, v.intoGson())
+            }
+            return obj
+        }
+
+        is kotlinx.serialization.json.JsonArray -> {
+            val arr = JsonArray()
+            for (v in this) {
+                arr.add(v.intoGson())
+            }
+            return arr
+        }
+    }
+}