Android Open Source - EffectiveAndroidUI Tv Show View Model

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The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2014 Pedro Vicente Gmez Snchez.
 */*from w ww  . ja  v a  2 s  .co m*/
 * 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 com.github.pedrovgs.effectiveandroidui.ui.viewmodel;

import com.github.pedrovgs.effectiveandroidui.domain.GetTvShowById;
import com.github.pedrovgs.effectiveandroidui.domain.tvshow.Chapter;
import com.github.pedrovgs.effectiveandroidui.domain.tvshow.ChapterCollection;
import com.github.pedrovgs.effectiveandroidui.domain.tvshow.TvShow;
import com.github.pedrovgs.effectiveandroidui.ui.fragment.TvShowFragment;
import com.github.pedrovgs.effectiveandroidui.ui.viewmodel.action.ActionCommand;
import com.github.pedrovgs.effectiveandroidui.ui.viewmodel.action.ShowTvShowOnBrowserActionCommand;
import java.util.LinkedList;
import java.util.List;
import javax.inject.Inject;

/**
 * ViewModel crated to represent a TvShow from the presentation point of view.
 *
 * This class could be a interface implementation if the TvShowViewModel has more than one
 * implementation.
 *
 * @author Pedro Vicente Gmez Snchez
 */
public class TvShowViewModel {

  private final GetTvShowById getTvShowById;
  private final ShowTvShowOnBrowserActionCommand showTvShowOnBrowserActionCommand;

  private Listener listener;
  private boolean isReady;

  @Inject
  public TvShowViewModel(GetTvShowById getTvShowById,
      ShowTvShowOnBrowserActionCommand showTvShowOnBrowserActionCommand) {
    this.getTvShowById = getTvShowById;
    this.showTvShowOnBrowserActionCommand = showTvShowOnBrowserActionCommand;
  }

  public void initialize() {
    listener.onEmptyCaseVisibilityChanged(true);
  }

  public void loadTvShow(final String tvShowId) {
    listener.onLoadVisibilityChanged(true);
    listener.onEmptyCaseVisibilityChanged(false);
    getTvShowById.execute(tvShowId, new GetTvShowById.Callback() {
      @Override public void onTvShowLoaded(TvShow tvShow) {
        notifyTvShowLoaded(tvShow);
      }

      @Override public void onTvShowNotFound() {
        notifyTvShowNotFound();
      }

      @Override public void onConnectionError() {
        notifyConnectionError();
      }
    });
  }

  public ActionCommand getTvShowClickedCommand() {
    return showTvShowOnBrowserActionCommand;
  }

  public void setListener(TvShowFragment listener) {
    this.listener = listener;
  }

  public Listener getListener() {
    return listener;
  }

  public void setReady(boolean isReady) {
    this.isReady = isReady;
  }

  private void notifyConnectionError() {
    if (isReady) {
      listener.onLoadVisibilityChanged(false);
      listener.onVisibilityChanged(false);
      listener.onEmptyCaseVisibilityChanged(true);
      listener.onConnectionErrorMessageNotFound();
    }
  }

  private void notifyTvShowNotFound() {
    if (isReady) {
      listener.onLoadVisibilityChanged(false);
      listener.onVisibilityChanged(false);
      listener.onEmptyCaseVisibilityChanged(true);
      listener.onTvShowMessageNotFound();
    }
  }

  private void notifyTvShowLoaded(TvShow tvShow) {
    showTvShowOnBrowserActionCommand.setTvShowUrl(tvShow.getPoster());
    if (isReady) {
      listener.onFanArtLoaded(tvShow.getFanArt());
      listener.onTvShowTitleLoaded(tvShow.getTitle());
      listener.onChaptersLoaded(getChaptersViewModel(tvShow.getChapters()));
      listener.onVisibilityChanged(true);
      listener.onLoadVisibilityChanged(false);
      listener.onEmptyCaseVisibilityChanged(false);
    }
  }

  private List<ChapterViewModel> getChaptersViewModel(ChapterCollection chapterCollection) {
    List<ChapterViewModel> chapterViewModels = new LinkedList<ChapterViewModel>();
    for (Chapter chapter : chapterCollection) {
      chapterViewModels.add(new ChapterViewModel(chapter));
    }
    return chapterViewModels;
  }

  /**
   * Interface created to work as ViewModel listener.
   * Every change in the view model will be
   * notified to Listener implementation.
   */
  public interface Listener {

    void onFanArtLoaded(final String fanArt);

    void onTvShowTitleLoaded(final String tvShowTitle);

    void onChaptersLoaded(final List<ChapterViewModel> chapters);

    void onVisibilityChanged(final boolean visible);

    void onLoadVisibilityChanged(final boolean visible);

    void onEmptyCaseVisibilityChanged(final boolean visible);

    void onTvShowMessageNotFound();

    void onConnectionErrorMessageNotFound();
  }
}

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