SavedSearchesListFragment.java

package com.dwdesign.tweetings.fragment;

import static com.dwdesign.tweetings.util.Utils.getActivatedAccountIds;
import static com.dwdesign.tweetings.util.Utils.openTweetSearch;

import java.util.Collections;
import java.util.Comparator;

import com.dwdesign.popupmenu.PopupMenu;
import com.dwdesign.popupmenu.PopupMenu.OnMenuItemClickListener;
import com.dwdesign.tweetings.R;
import com.dwdesign.tweetings.app.TweetingsApplication;
import com.dwdesign.tweetings.loader.SavedSearchesLoader;
import com.dwdesign.tweetings.model.Panes;

import twitter4j.ResponseList;
import twitter4j.SavedSearch;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.Loader;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class SavedSearchesListFragment extends PullToRefreshListFragment implements
		LoaderCallbacks<ResponseList<SavedSearch>>, OnItemClickListener, Panes.Left, OnMenuItemClickListener {

	private PopupMenu mPopupMenu;
	private SavedSearchesAdapter mAdapter;

	private long mAccountId;
	private ListView mListView;
	private long mSelectedId;
	
	private final BroadcastReceiver mStateReceiver = new BroadcastReceiver() {

		@Override
		public void onReceive(final Context context, final Intent intent) {
			final String action = intent.getAction();
			if (BROADCAST_SEARCH_CHANGED.equals(action)) {
				getLoaderManager().restartLoader(0, null, SavedSearchesListFragment.this);
			} 
		}

	};
	
	private static final Comparator<SavedSearch> POSITION_COMPARATOR = new Comparator<SavedSearch>() {

		@Override
		public int compare(final SavedSearch object1, final SavedSearch object2) {
			return object1.getPosition() - object2.getPosition();
		}

	};

	@Override
	public void onActivityCreated(final Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);
		mAdapter = new SavedSearchesAdapter(getActivity());
		setListAdapter(mAdapter);
		mListView = getListView();
		mListView.setOnItemClickListener(this);
		final Bundle args = getArguments();
		mAccountId = args != null ? args.getLong(INTENT_KEY_ACCOUNT_ID, -1) : -1;
		getLoaderManager().initLoader(0, null, this);
		setListShown(false);
	}

	@Override
	public Loader<ResponseList<SavedSearch>> onCreateLoader(final int id, final Bundle args) {
		return new SavedSearchesLoader(getActivity(), mAccountId);
	}

	@Override
	public void onItemClick(final AdapterView<?> parent, final View view, final int position, final long id) {
		final SavedSearch item = mAdapter.findItem(id);
		if (item == null) return;
		openTweetSearch(getActivity(), mAccountId, item.getQuery(), item.getId());
	}
	
	public boolean onItemLongClick(final AdapterView<?> adapter, final View view, final int position, final long id) {
		mSelectedId = id;
		mPopupMenu = PopupMenu.getInstance(getActivity(), view);
		mPopupMenu.inflate(R.menu.action_savedsearch);
		mPopupMenu.setOnMenuItemClickListener(this);
		mPopupMenu.show();
		return true;
	}
	
	public boolean onMenuItemClick(final MenuItem item) {
		switch (item.getItemId()) {
			case MENU_DELETE: {
				final SavedSearch searchItem = mAdapter.findItem(mSelectedId);
				final TweetingsApplication application = getApplication();
				application.getServiceInterface().destroySavedSearch(mAccountId, searchItem.getId());
				break;
			}
		}
		return super.onContextItemSelected(item);
	}
	
	@Override
	public void onStop() {
		if (mPopupMenu != null) {
			mPopupMenu.dismiss();
		}
		unregisterReceiver(mStateReceiver);
		super.onStop();
	}
	
	@Override
	public void onStart() {
		super.onStart();
		final IntentFilter filter = new IntentFilter(BROADCAST_SEARCH_CHANGED);
		filter.addAction(BROADCAST_RETWEET_CHANGED);
		registerReceiver(mStateReceiver, filter);
	}

	@Override
	public void onLoaderReset(final Loader<ResponseList<SavedSearch>> loader) {
		mAdapter.setData(null);
	}

	@Override
	public void onLoadFinished(final Loader<ResponseList<SavedSearch>> loader, final ResponseList<SavedSearch> data) {
		if (data != null) {
			Collections.sort(data, POSITION_COMPARATOR);
		}
		mAdapter.setData(data);
		setListShown(true);
		onRefreshComplete();
	}

	@Override
	public void onPullDownToRefresh() {
		getLoaderManager().restartLoader(0, null, this);
	}

	@Override
	public void onPullUpToRefresh() {
		
	}

	static class SavedSearchesAdapter extends BaseAdapter {

		private ResponseList<SavedSearch> mData;
		private final LayoutInflater mInflater;

		public SavedSearchesAdapter(final Context context) {
			mInflater = LayoutInflater.from(context);
		}

		public SavedSearch findItem(final long id) {
			final int count = getCount();
			for (int i = 0; i < count; i++) {
				if (id != -1 && id == getItemId(i)) return getItem(i);
			}
			return null;
		}

		@Override
		public int getCount() {
			return mData != null ? mData.size() : 0;
		}

		@Override
		public SavedSearch getItem(final int position) {
			return mData != null ? mData.get(position) : null;
		}

		@Override
		public long getItemId(final int position) {
			return mData != null ? mData.get(position).getId() : -1;
		}

		@Override
		public View getView(final int position, final View convertView, final ViewGroup parent) {
			final View view = convertView != null ? convertView : mInflater.inflate(
					android.R.layout.simple_list_item_1, null);
			final TextView text = (TextView) view.findViewById(android.R.id.text1);
			text.setText(getItem(position).getName());
			return view;
		}

		public void setData(final ResponseList<SavedSearch> data) {
			mData = data;
			notifyDataSetChanged();
		}

	}

}