SimpleCountriesPresenter.java

/*
 * Copyright 2015 Hannes Dorfmann.
 *
 * 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.hannesdorfmann.mosby3.sample.mvp.lce;

import android.util.Log;
import com.hannesdorfmann.mosby3.mvp.MvpBasePresenter;
import com.hannesdorfmann.mosby3.sample.mvp.CountriesPresenter;
import com.hannesdorfmann.mosby3.sample.mvp.CountriesView;
import com.hannesdorfmann.mosby3.sample.mvp.model.CountriesAsyncLoader;
import com.hannesdorfmann.mosby3.sample.mvp.model.Country;
import java.util.List;

/**
 * @author Hannes Dorfmann
 */
public class SimpleCountriesPresenter extends MvpBasePresenter<CountriesView>
    implements CountriesPresenter {

  private static final String TAG = "CountriesPresenter";

  private int failingCounter = 0;
  private CountriesAsyncLoader countriesLoader;

  public SimpleCountriesPresenter() {
    Log.d(TAG, "constructor " + toString());
  }

  @Override public void loadCountries(final boolean pullToRefresh) {

    Log.d(TAG, "loadCountries(" + pullToRefresh + ")");

    Log.d(TAG, "showLoading(" + pullToRefresh + ")");

    getView().showLoading(pullToRefresh);

    if (countriesLoader != null && !countriesLoader.isCancelled()) {
      countriesLoader.cancel(true);
    }

    countriesLoader = new CountriesAsyncLoader(++failingCounter % 2 != 0,
        new CountriesAsyncLoader.CountriesLoaderListener() {

          @Override public void onSuccess(List<Country> countries) {

            if (isViewAttached()) {
              Log.d(TAG, "setData()");
              getView().setData(countries);

              Log.d(TAG, "showContent()");
              getView().showContent();
            }
          }

          @Override public void onError(Exception e) {

            if (isViewAttached()) {

              Log.d(TAG, "showError(" + e.getClass().getSimpleName() + " , " + pullToRefresh + ")");
              getView().showError(e, pullToRefresh);
            }
          }
        });
    countriesLoader.execute();
  }

  @Override public void detachView(boolean retainInstance) {
    super.detachView(retainInstance);

    StringBuilder builder = new StringBuilder("---- detachView(" + retainInstance + ") ");
    if (!retainInstance) {
      if (countriesLoader != null) {
        countriesLoader.cancel(true);
      }
      builder.append(" --> cancel Loader");
    }

    builder.append(" ----");
    Log.d(TAG, builder.toString());
  }

  @Override public void attachView(CountriesView view) {
    super.attachView(view);
    Log.d(TAG, "attach view " + view.toString());
  }
}