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/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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 org.elasticsearch.rest.action.index;

import org.elasticsearch.action.WriteConsistencyLevel;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.index.VersionType;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.BytesRestResponse;
import org.elasticsearch.rest.RestChannel;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.support.RestActions;
import org.elasticsearch.rest.action.support.RestStatusToXContentListener;

import java.io.IOException;

import static org.elasticsearch.rest.RestRequest.Method.POST;
import static org.elasticsearch.rest.RestRequest.Method.PUT;
import static org.elasticsearch.rest.RestStatus.BAD_REQUEST;

/**
 *
 */
public class RestIndexAction extends BaseRestHandler {

    @Inject
    public RestIndexAction(Settings settings, RestController controller, Client client) {
        super(settings, client);
        controller.registerHandler(POST, "/{index}/{type}", this); // auto id creation
        controller.registerHandler(PUT, "/{index}/{type}/{id}", this);
        controller.registerHandler(POST, "/{index}/{type}/{id}", this);
        CreateHandler createHandler = new CreateHandler(settings, controller, client);
        controller.registerHandler(PUT, "/{index}/{type}/{id}/_create", createHandler);
        controller.registerHandler(POST, "/{index}/{type}/{id}/_create", createHandler);
    }

    final class CreateHandler extends BaseRestHandler {
        protected CreateHandler(Settings settings, RestController controller, Client client) {
            super(settings, client);
        }

        @Override
        public void handleRequest(RestRequest request, RestChannel channel, final Client client) {
            request.params().put("op_type", "create");
            RestIndexAction.this.handleRequest(request, channel, client);
        }
    }

    @Override
    public void handleRequest(final RestRequest request, final RestChannel channel, final Client client) {
        IndexRequest indexRequest = new IndexRequest(request.param("index"), request.param("type"), request.param("id"));
        indexRequest.routing(request.param("routing"));
        indexRequest.parent(request.param("parent")); // order is important, set it after routing, so it will set the routing
        indexRequest.timestamp(request.param("timestamp"));
        if (request.hasParam("ttl")) {
            indexRequest.ttl(request.param("ttl"));
        }
        indexRequest.setPipeline(request.param("pipeline"));
        indexRequest.source(request.content());
        indexRequest.timeout(request.paramAsTime("timeout", IndexRequest.DEFAULT_TIMEOUT));
        indexRequest.setRefreshPolicy(request.param("refresh"));
        indexRequest.version(RestActions.parseVersion(request));
        indexRequest.versionType(VersionType.fromString(request.param("version_type"), indexRequest.versionType()));
        String sOpType = request.param("op_type");
        if (sOpType != null) {
            try {
                indexRequest.opType(IndexRequest.OpType.fromString(sOpType));
            } catch (IllegalArgumentException eia){
                try {
                    XContentBuilder builder = channel.newErrorBuilder();
                    channel.sendResponse(new BytesRestResponse(BAD_REQUEST, builder.startObject().field("error", eia.getMessage()).endObject()));
                } catch (IOException e1) {
                    logger.warn("Failed to send response", e1);
                    return;
                }
            }
        }
        String consistencyLevel = request.param("consistency");
        if (consistencyLevel != null) {
            indexRequest.consistencyLevel(WriteConsistencyLevel.fromString(consistencyLevel));
        }
        client.index(indexRequest, new RestStatusToXContentListener<>(channel));
    }
}