Funnel all gson calls into helper functions

Add deprecated getGsonFactory for plugin compat until 3.0

src/main/java/emu/grasscutter/utils/Utils.java

@@ -20,12 +20,25 @@ import it.unimi.dsi.fastutil.ints.IntList;
 
 import org.slf4j.Logger;
 
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonSyntaxException;
+import com.google.gson.reflect.TypeToken;
+
 import javax.annotation.Nullable;
 
 import static emu.grasscutter.utils.Language.translate;
 
 @SuppressWarnings({"UnusedReturnValue", "BooleanMethodIsAlwaysInverted"})
 public final class Utils {
+    private static final Gson gson = new GsonBuilder().setPrettyPrinting().create();
+
+    @Deprecated(forRemoval = true)
+    public static Gson getGsonFactory() {
+        return gson;
+    }
+
     public static final Random random = new Random();
 
     public static int randomRange(int min, int max) {
@@ -158,8 +171,7 @@ public final class Utils {
      * @param object The object to log.
      */
     public static void logObject(Object object) {
-        String asJson = Grasscutter.getGsonFactory().toJson(object);
-        Grasscutter.getLogger().info(asJson);
+        Grasscutter.getLogger().info(jsonEncode(object));
     }
 
     /**
@@ -357,6 +369,44 @@ public final class Utils {
         return Base64.getDecoder().decode(toDecode);
     }
 
+    /*
+     * Encode an object to a JSON string
+     */
+    public static String jsonEncode(Object object) {
+        return gson.toJson(object);
+    }
+
+    public static <T> T jsonDecode(JsonElement jsonElement, Class<T> classType) throws JsonSyntaxException {
+        return gson.fromJson(jsonElement, classType);
+    }
+
+    public static <T> T loadJsonToClass(InputStreamReader fileReader, Class<T> classType) throws IOException {
+        return gson.fromJson(fileReader, classType);
+    }
+    public static <T> T loadJsonToClass(String filename, Class<T> classType) throws IOException {
+        try (InputStreamReader fileReader = new InputStreamReader(new FileInputStream(Utils.toFilePath(filename)), StandardCharsets.UTF_8)) {
+            return loadJsonToClass(fileReader, classType);
+        }
+    }
+
+    public static <T> List<T> loadJsonToList(InputStreamReader fileReader, Class<T> classType) throws IOException {
+        return gson.fromJson(fileReader, TypeToken.getParameterized(List.class, classType).getType());
+    }
+    public static <T> List<T> loadJsonToList(String filename, Class<T> classType) throws IOException {
+        try (InputStreamReader fileReader = new InputStreamReader(new FileInputStream(Utils.toFilePath(filename)), StandardCharsets.UTF_8)) {
+            return loadJsonToList(fileReader, classType);
+        }
+    }
+
+    public static <T1,T2> Map<T1,T2> loadJsonToMap(InputStreamReader fileReader, Class<T1> keyType, Class<T2> valueType) throws IOException {
+        return gson.fromJson(fileReader, TypeToken.getParameterized(Map.class, keyType, valueType).getType());
+    }
+    public static <T1,T2> Map<T1,T2> loadJsonToMap(String filename, Class<T1> keyType, Class<T2> valueType) throws IOException {
+        try (InputStreamReader fileReader = new InputStreamReader(new FileInputStream(Utils.toFilePath(filename)), StandardCharsets.UTF_8)) {
+            return loadJsonToMap(fileReader, keyType, valueType);
+        }
+    }
+
     /**
      * Safely JSON decodes a given string.
      * @param jsonData The JSON-encoded data.
@@ -364,7 +414,7 @@ public final class Utils {
      */
     public static <T> T jsonDecode(String jsonData, Class<T> classType) {
         try {
-            return Grasscutter.getGsonFactory().fromJson(jsonData, classType);
+            return gson.fromJson(jsonData, classType);
         } catch (Exception ignored) {
             return null;
         }