ManagePostsDS.java

/**
 * Copyright [2015] [Christian Loehnert]
 *
 * 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 de.ks.blogging.grav.ui.post.manage;

import de.ks.blogging.grav.entity.GravBlog;
import de.ks.blogging.grav.pages.GravPages;
import de.ks.blogging.grav.posts.BasePost;
import de.ks.datasource.ListDataSource;

import javax.inject.Inject;
import java.time.LocalDateTime;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.function.Consumer;
import java.util.stream.Collectors;

public class ManagePostsDS implements ListDataSource<BasePost> {

  @Inject
  GravPages pages;

  GravBlog selectedBlog;

  @Override
  public List<BasePost> loadModel(Consumer<List<BasePost>> furtherProcessing) {
    if (selectedBlog == null) {
      return Collections.emptyList();
    } else {
      pages.setBlog(selectedBlog);
      pages.scan();
      Comparator<BasePost> comparing = Comparator.comparing(p -> p.getHeader().getLocalDateTime().orElse(LocalDateTime.now()));
      List<BasePost> allPosts = pages.getAllPosts().stream()//
        .filter(p -> p != null)//
        .filter(p -> p.getHeader().getTitle() != null && p.getHeader().getTitle().length() > 0)//
        .sorted(comparing.reversed())//
        .collect(Collectors.toList());
      return allPosts;
    }
  }

  @Override
  public void saveModel(List<BasePost> model, Consumer<List<BasePost>> beforeSaving) {

  }

  @Override
  public void setLoadingHint(Object dataSourceHint) {
    if (dataSourceHint instanceof GravBlog) {
      selectedBlog = (GravBlog) dataSourceHint;
    }
  }
}