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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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 com.bluenimble.platform.api.impls.spis;

import com.bluenimble.platform.Json;
import com.bluenimble.platform.Lang;
import com.bluenimble.platform.api.Api;
import com.bluenimble.platform.api.ApiOutput;
import com.bluenimble.platform.api.ApiRequest;
import com.bluenimble.platform.api.ApiResponse;
import com.bluenimble.platform.api.ApiServiceExecutionException;
import com.bluenimble.platform.api.media.MediaTypeUtils;
import com.bluenimble.platform.api.security.ApiConsumer;
import com.bluenimble.platform.storage.Storage;
import com.bluenimble.platform.storage.StorageException;
import com.bluenimble.platform.storage.StorageObject;

public class GetStorageObjectApiServiceSpi extends AbstractStorageApiServiceSpi {

	private static final long serialVersionUID = 1283296736684087088L;
	
	@Override
	public ApiOutput execute (Api api, ApiConsumer consumer, ApiRequest request, ApiResponse response) throws ApiServiceExecutionException {
		Storage storage = feature (
			api,
			Storage.class, 
			Json.getString (request.getService ().getSpiDef (), Spec.Feature), 
			request
		);
		
		String path = (String)request.get (Spec.ObjectPath);
		if (Lang.isNullOrEmpty (path)) {
			throw new ApiServiceExecutionException ("object path not found. Missing request parameter '" + Spec.ObjectPath + "'").status (ApiResponse.BAD_REQUEST);
		}
		
		ApiOutput output;
		try {
			StorageObject object = find (storage.root (), path);
			output = object.toOutput (null, (String)request.get (Spec.As), MediaTypeUtils.getMediaForFile ((String)request.get (Spec.Type)));
		} catch (StorageException e) {
			throw new ApiServiceExecutionException (e.getMessage (), e).status (ApiResponse.NOT_FOUND);
		}
		
		if (output == null) {
			throw new ApiServiceExecutionException ("object " + path + " not found").status (ApiResponse.NOT_FOUND);
		}
		
		return output;
	}

}