com.github.achatain.catalog.servlet.CollectionIdServlet.java Source code

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Here is the source code for com.github.achatain.catalog.servlet.CollectionIdServlet.java

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/*
 * https://github.com/achatain/catalog
 *
 * Copyright (C) 2017 Antoine Chatain (achatain [at] outlook [dot] com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.github.achatain.catalog.servlet;

import com.github.achatain.catalog.dto.CollectionDto;
import com.github.achatain.catalog.entity.Link;
import com.github.achatain.catalog.service.CollectionService;
import com.github.achatain.javawebappauthentication.service.SessionService;
import com.google.api.client.util.Preconditions;
import com.google.gson.Gson;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Optional;
import java.util.logging.Logger;

import static java.lang.String.format;
import static org.apache.commons.lang3.StringUtils.removeEnd;

@Singleton
public class CollectionIdServlet extends AuthenticatedJsonHttpServlet {

    public static final String REGEX_PATH = "\\%s\\%s\\/collections\\/\\w+(\\/)?";

    private static final transient Logger LOG = Logger.getLogger(CollectionIdServlet.class.getName());

    private final transient CollectionService collectionService;

    @Inject
    CollectionIdServlet(final SessionService sessionService, final CollectionService collectionService,
            @Named("pretty") final Gson gson) {
        super(gson, sessionService);
        this.collectionService = collectionService;
    }

    @Override
    protected void doGet(final HttpServletRequest req, final HttpServletResponse resp)
            throws ServletException, IOException {
        LOG.info("Look up the collection " + extractCollectionIdFromRequest(req));

        final String userId = getUserId(req);
        final String colId = extractCollectionIdFromRequest(req);

        final Optional<CollectionDto> optionalCollectionDto = collectionService.readCollection(userId, colId);

        if (optionalCollectionDto.isPresent()) {
            final CollectionDto col = optionalCollectionDto.get();
            final String href = removeEnd(req.getRequestURL().toString(), "/");
            final String hrefItems = format("%s/items", href);
            col.addLink(Link.create().withRel("self").withMethod(Link.Method.GET).withHref(href).build());
            col.addLink(Link.create().withRel("edit").withMethod(Link.Method.PUT).withHref(href).build());
            col.addLink(Link.create().withRel("delete").withMethod(Link.Method.DELETE).withHref(href).build());
            col.addLink(Link.create().withRel("list").withMethod(Link.Method.GET).withHref(hrefItems).build());
            col.addLink(Link.create().withRel("add").withMethod(Link.Method.POST).withHref(hrefItems).build());

            final String hrefIndexes = format("%s/indexes", href);
            col.getFields()
                    .forEach(fieldDto -> fieldDto
                            .addLink(Link.create().withRel(fieldDto.isIndexed() ? "dropIndex" : "createIndex")
                                    .withMethod(fieldDto.isIndexed() ? Link.Method.DELETE : Link.Method.POST)
                                    .withHref(format("%s/%s", hrefIndexes, fieldDto.getName())).build()));

            sendResponse(resp, col);
        } else {
            sendNotFoundError(resp, format("No collection was found with id [%s]", colId));
        }
    }

    @Override
    protected void doPut(final HttpServletRequest req, final HttpServletResponse resp)
            throws ServletException, IOException {
        LOG.info("Edit the collection " + extractCollectionIdFromRequest(req));

        final String userId = getUserId(req);
        final String colId = extractCollectionIdFromRequest(req);

        final CollectionDto collectionDto = gson.fromJson(req.getReader(), CollectionDto.class);
        Preconditions.checkArgument(collectionDto != null, "Request body is missing");

        LOG.info(format("User [%s] to edit the collection [%s] with [%s]", userId, colId,
                gson.toJson(collectionDto)));

        collectionService.updateCollection(userId, colId, collectionDto);
    }

    @Override
    protected void doDelete(final HttpServletRequest req, final HttpServletResponse resp)
            throws ServletException, IOException {
        final String userId = getUserId(req);
        final String colId = extractCollectionIdFromRequest(req);

        this.collectionService.deleteCollection(userId, colId);

        LOG.info(format("Deleted the collection [%s] for user [%s]", colId, userId));
    }
}