SourceService.java

/*
 * Copyright 2016 Studentmediene i Trondheim AS
 *
 * 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.
 */

package no.dusken.momus.service;

import no.dusken.momus.model.Source;
import no.dusken.momus.model.SourceTag;
import no.dusken.momus.service.repository.SourceRepository;
import no.dusken.momus.service.repository.SourceTagRepository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;


@Service
public class SourceService {

    @Autowired
    private SourceRepository sourceRepository;

    @Autowired
    private SourceTagRepository tagRepository;

    Logger logger = LoggerFactory.getLogger(getClass());


    public SourceRepository getSourceRepository() {
        return sourceRepository;
    }

    public SourceTagRepository getTagRepository() {
        return tagRepository;
    }

    /**
     * Will save any new tags as well
     */
    public Source save(Source source) {
        tagRepository.save(source.getTags());
        source = sourceRepository.save(source);

        logger.info("Saving source: {}", source.dump());
        return source;
    }

    /**
     * Will remove the tag from all sources where it has been used.
     * Logs everything so it can be undone
     */
    public void deleteTag(SourceTag tag) {
        logger.info("Deleting tag {}", tag);

        List<Source> sources = sourceRepository.findByTag(tag.getTag());

        for (Source source : sources) {
            source.getTags().remove(tag);
            logger.info("Tag {} removed from sourceId {}", tag.getTag(), source.getId());
        }
        sourceRepository.save(sources);

        tagRepository.delete(tag);
    }

    /**
     * Basically adds the new tag to every source and removes the old one
     */
    public SourceTag updateTag(SourceTag oldTag, SourceTag newTag) {
        logger.info("Renaming tag from {} to {}", oldTag.getTag(), newTag.getTag());

        List<Source> sources = sourceRepository.findByTag(oldTag.getTag());

        SourceTag saved = tagRepository.save(newTag);

        for (Source source : sources) {
            source.getTags().remove(oldTag);
            source.getTags().add(newTag);
        }
        sourceRepository.save(sources);

        tagRepository.delete(oldTag);
        return saved;
    }
}