1 files changed, 90 insertions, 0 deletions
diff --git a/src/main/java/dev/isxander/yacl3/config/v3/JsonFileCodecConfig.java b/src/main/java/dev/isxander/yacl3/config/v3/JsonFileCodecConfig.java
new file mode 100644
index 0000000..49a0dac
--- /dev/null
+++ b/src/main/java/dev/isxander/yacl3/config/v3/JsonFileCodecConfig.java
@@ -0,0 +1,90 @@
+package dev.isxander.yacl3.config.v3;
+
+import com.google.gson.*;
+import com.mojang.serialization.DataResult;
+import com.mojang.serialization.JsonOps;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.Nullable;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+
+@ApiStatus.Experimental
+public abstract class JsonFileCodecConfig extends CodecConfig {
+    private final Path configPath;
+    private final Gson gson;
+
+    public JsonFileCodecConfig(Path configPath) {
+        this.configPath = configPath;
+        this.gson = createGson();
+    }
+
+    public void saveToFile() {
+        DataResult<JsonElement> jsonTreeResult = this.encodeStart(JsonOps.INSTANCE);
+        if (jsonTreeResult.error().isPresent()) {
+            onSaveError(
+                    SaveError.ENCODING,
+                    new IllegalStateException("Failed to encode: " + jsonTreeResult.error().get().message())
+            );
+            return;
+        }
+
+        JsonElement jsonTree = jsonTreeResult.result().orElseThrow();
+        String json = gson.toJson(jsonTree);
+
+        try {
+            Files.writeString(configPath, json, StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.CREATE);
+        } catch (IOException e) {
+            onSaveError(SaveError.WRITING, e);
+        }
+    }
+
+    public boolean loadFromFile() {
+        if (Files.notExists(configPath)) {
+            return false;
+        }
+
+        String json;
+        try {
+            json = Files.readString(configPath);
+        } catch (IOException e) {
+            onLoadError(LoadError.READING, e);
+            return false;
+        }
+
+        JsonElement jsonTree;
+        try {
+            jsonTree = JsonParser.parseString(json);
+        } catch (JsonParseException e) {
+            onLoadError(LoadError.JSON_PARSING, e);
+            return false;
+        }
+
+        return this.decode(jsonTree, JsonOps.INSTANCE);
+    }
+
+    protected Gson createGson() {
+        return new GsonBuilder().setPrettyPrinting().create();
+    }
+
+    protected void onSaveError(SaveError error, @Nullable Throwable e) {
+        throw new IllegalStateException("Error whilst " + error.name().toLowerCase(), e);
+    }
+
+    protected void onLoadError(LoadError error, @Nullable Throwable e) {
+        throw new IllegalStateException("Error whilst " + error.name().toLowerCase(), e);
+    }
+
+    protected enum SaveError {
+        WRITING,
+        ENCODING,
+    }
+
+    protected enum LoadError {
+        READING,
+        JSON_PARSING,
+        DECODING,
+    }
+}