/*
 * Copyright 2019 Red Hat, Inc.
 *
 * Red Hat licenses this file to you under the Apache License, version 2.0
 * (the "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package io.vertx.ext.web.handler.graphql.impl;

import io.vertx.core.buffer.Buffer;
import io.vertx.core.json.DecodeException;
import io.vertx.core.json.Json;
import io.vertx.core.json.JsonArray;
import io.vertx.core.json.JsonObject;

/**
 * @author Thomas Segismont
 */
public interface GraphQLInput {

  static GraphQLInput decode(Buffer buffer) {
    final Object value = Json.decodeValue(buffer);
    return decode(value);
  }

  static GraphQLInput decode(Object value) {
    if (value instanceof JsonObject) {
      return new GraphQLQuery((JsonObject) value);
    } else if (value instanceof JsonArray) {
      return new GraphQLBatch((JsonArray) value);
    } else {
      throw new DecodeException("Unexpected json content");
    }
  }
}
