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/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2019 Nokia Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.sdc.be.servlets;

import com.jcabi.aspects.Loggable;
import fj.data.Either;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import io.swagger.annotations.ApiResponse;
import io.swagger.annotations.ApiResponses;
import java.io.IOException;
import java.util.Set;
import java.util.stream.Collectors;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.onap.sdc.gab.model.GABQuery;
import org.onap.sdc.gab.model.GABQuery.GABQueryType;
import org.openecomp.sdc.be.info.GenericArtifactQueryInfo;
import org.openecomp.sdc.common.log.wrappers.Logger;
import org.openecomp.sdc.exception.ResponseFormat;
import org.owasp.esapi.ESAPI;
import org.springframework.stereotype.Controller;

@Loggable(prepend = true, value = Loggable.DEBUG, trim = false)
@Path("/v1/catalog/gab")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
@Api(value = "Generic Artifact Browser")
@Controller
public class GenericArtifactBrowserServlet extends BeGenericServlet {

    private static final Logger LOGGER = Logger.getLogger(GenericArtifactBrowserServlet.class);

    @POST
    @Path("/searchFor")
    @ApiOperation(value = "Search json paths inside the yaml", httpMethod = "POST", notes = "Returns found entries of json paths", response = Response.class)
    @ApiResponses(value = {
        @ApiResponse(code = 200, message = "Returned yaml entries"),
        @ApiResponse(code = 400, message = "Invalid content / Missing content")})
    public Response searchFor(
        @ApiParam(value = "Generic Artifact search model", required = true) GenericArtifactQueryInfo query,
        @Context final HttpServletRequest request) {
        try {
            ServletContext context = request.getSession().getServletContext();
            Either<ImmutablePair<String, byte[]>, ResponseFormat> immutablePairResponseFormatEither = getArtifactBL(context)
                .downloadArtifact(ESAPI.encoder().canonicalize(query.getParentId()), ESAPI.encoder().canonicalize(query.getArtifactUniqueId()));
            if (immutablePairResponseFormatEither.isLeft()){
                GABQuery gabQuery = prepareGabQuery(query, immutablePairResponseFormatEither);
                return buildOkResponse(getGenericArtifactBrowserBL(context).searchFor(gabQuery));
            }else{
                throw new IOException(immutablePairResponseFormatEither.right().value().getFormattedMessage());
            }
        } catch (IOException e) {
            LOGGER.error("Cannot search for a given queries in the yaml file", e);
            return buildGeneralErrorResponse();
        }
    }

    private GABQuery prepareGabQuery(GenericArtifactQueryInfo query,
        Either<ImmutablePair<String, byte[]>, ResponseFormat> immutablePairResponseFormatEither) {
        byte[] content = immutablePairResponseFormatEither.left().value().getRight();
        Set<String> queryFields = query.getFields().stream().map(ESAPI.encoder()::canonicalize).collect(Collectors.toSet());
        return new GABQuery(queryFields, new String(content), GABQueryType.CONTENT);
    }

}