AdvancedSearchActivity.java

/*
    Copyright (C) 2013 Prasanna Thirumalai
    
    This file is part of StackX.

    StackX 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.

    StackX 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 StackX.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.prasanna.android.stacknetwork;

import android.app.FragmentTransaction;
import android.content.res.Configuration;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

import com.prasanna.android.stacknetwork.fragment.SearchCriteriaFragment;
import com.prasanna.android.stacknetwork.fragment.SearchCriteriaFragment.OnRunSearchListener;
import com.prasanna.android.stacknetwork.fragment.SearchQuestionListFragment;
import com.prasanna.android.stacknetwork.model.SearchCriteria;
import com.prasanna.android.stacknetwork.model.SearchCriteriaDomain;
import com.prasanna.android.stacknetwork.utils.AppUtils;
import com.prasanna.android.stacknetwork.utils.StringConstants;
import com.prasanna.android.task.AsyncTaskCompletionNotifier;
import com.prasanna.android.utils.LogWrapper;

public class AdvancedSearchActivity extends AbstractUserActionBarActivity implements OnRunSearchListener {
  private static final String TAG = AdvancedSearchActivity.class.getSimpleName();
  private SearchQuestionListFragment questionListFragment;
  private SearchCriteriaFragment searchCriteriaFragment;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.advanced_search);
    searchCriteriaFragment =
        (SearchCriteriaFragment) getFragmentManager().findFragmentById(R.id.searchCriteriaFragment);
    questionListFragment =
        (SearchQuestionListFragment) getFragmentManager().findFragmentById(R.id.questionListFragment);

    if (StringConstants.SEARCH_CRITERIA.equals(getIntent().getAction()))
      searchCriteriaFragment.loadCriteria((SearchCriteriaDomain) getIntent().getSerializableExtra(
          StringConstants.SEARCH_CRITERIA));
  }

  private void showOrHideQuestionListFragment(Configuration configuration) {
    if (!searchCriteriaFragment.isRemoving() && !questionListFragment.isRemoving()) {
      FragmentTransaction ft = getFragmentManager().beginTransaction();
      if (configuration.orientation == Configuration.ORIENTATION_PORTRAIT) {
        if (questionListFragment.hasResults()) {
          getActionBar().setDisplayHomeAsUpEnabled(true);
          ft.hide(searchCriteriaFragment);
          ft.show(questionListFragment);
          AppUtils.hideSoftInput(this, getWindow().getCurrentFocus());
        }
        else {
          getActionBar().setDisplayHomeAsUpEnabled(false);
          ft.show(searchCriteriaFragment);
          ft.hide(questionListFragment);
        }
      }
      else {
        getActionBar().setDisplayHomeAsUpEnabled(false);
        ft.show(searchCriteriaFragment);
        if (questionListFragment.hasResults())
          ft.show(questionListFragment);
        else
          ft.hide(questionListFragment);
      }

      // Why not commit? While in SearchCriteriaFragment, change
      // orientation to landscape, launch SearchCriteriaListActivity.
      // While in SearchCriteriaListActivity, change orientation back to
      // portrait and press back. IllegalStateException is thrown saying
      // commit cannot be performed after onSaveInstanceState has been
      // called. Hence, commitAllowingStateLoss. But not convinced this is
      // ok.
      ft.commitAllowingStateLoss();
    }
  }

  @Override
  public boolean onPrepareOptionsMenu(Menu menu) {
    boolean ret = super.onPrepareOptionsMenu(menu);

    menu.removeItem(R.id.menu_refresh);
    menu.removeItem(R.id.menu_advanced_search);

    return ret & true;
  }

  @Override
  protected void onStart() {
    LogWrapper.d(TAG, "onStart");

    super.onStart();

    showOrHideQuestionListFragment(getResources().getConfiguration());
  }

  @Override
  public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    showOrHideQuestionListFragment(newConfig);

  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() == R.id.menu_save) {
      searchCriteriaFragment.saveCriteria(getSaveCriteriaTaskCompletionNotifier());
      return true;
    }

    return super.onOptionsItemSelected(item);
  }

  private AsyncTaskCompletionNotifier<Boolean> getSaveCriteriaTaskCompletionNotifier() {
    return new AsyncTaskCompletionNotifier<Boolean>() {
      @Override
      public void notifyOnCompletion(Boolean result) {
        if (result) {
          setActionBarTitle(searchCriteriaFragment.getCriteriaName());
          Toast.makeText(AdvancedSearchActivity.this, "Search criteria saved", Toast.LENGTH_SHORT).show();
        }
        else
          Toast.makeText(AdvancedSearchActivity.this, "Cannot save criteria", Toast.LENGTH_LONG).show();
      }
    };
  }

  @Override
  protected void refresh() {
    throw new UnsupportedOperationException("Refresh not supported for " + TAG);
  }

  @Override
  protected boolean shouldSearchViewBeEnabled() {
    return false;
  }

  @Override
  public void onRunSearch(SearchCriteria searchCriteria, boolean savedCriteria) {
    runSearchAndShowResults(searchCriteria, false, savedCriteria);
  }

  @Override
  protected boolean onActionBarHomeButtonClick(MenuItem menuItem) {
    if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT
        && searchCriteriaFragment.isAdded() && !searchCriteriaFragment.isVisible()) {
      if (!getFragmentManager().popBackStackImmediate()) {
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        ft.show(searchCriteriaFragment);
        ft.hide(questionListFragment);
        ft.commit();
      }

      return true;
    }

    return super.onActionBarHomeButtonClick(menuItem);
  }

  private void runSearchAndShowResults(SearchCriteria searchCriteria, boolean addToBackStack, boolean savedCriteria) {
    FragmentTransaction ft = getFragmentManager().beginTransaction();

    ft.show(questionListFragment);
    if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
      ft.hide(searchCriteriaFragment);
      ft.addToBackStack(null);
    }
    else
      searchCriteriaFragment.updateViewForDualPane(getResources().getConfiguration().orientation);

    ft.commit();

    questionListFragment.search(searchCriteria, savedCriteria);
  }
}