PhotoDetailLikesFragment.java

/**
 * 
 */
package com.gmail.charleszq.picorner.ui;

import java.util.ArrayList;
import java.util.List;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.gmail.charleszq.picorner.R;
import com.gmail.charleszq.picorner.model.Author;
import com.gmail.charleszq.picorner.model.MediaObject;
import com.gmail.charleszq.picorner.model.MediaSourceType;
import com.gmail.charleszq.picorner.task.AbstractGeneralTask;
import com.gmail.charleszq.picorner.task.IGeneralTaskDoneListener;
import com.gmail.charleszq.picorner.task.flickr.FetchFlickrUserIconUrlTask;
import com.gmail.charleszq.picorner.task.flickr.GetFlickrPhotoFavUsersTask;
import com.gmail.charleszq.picorner.task.ig.InstagramLoadLikesTask;
import com.gmail.charleszq.picorner.utils.IConstants;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;

/**
 * Represents the fragment to show the users who like a photo.
 * 
 * @author charles(charleszq@gmail.com)
 * 
 */
public class PhotoDetailLikesFragment extends AbstractFragmentWithImageFetcher
		implements OnItemClickListener {

	private MediaObject		mCurrentPhoto;
	private List<Author>	mAuthors	= new ArrayList<Author>();

	// UI controls
	private ProgressBar		mProgressBar;
	private TextView		mNoLikesText;

	/**
	 * 
	 */
	public PhotoDetailLikesFragment() {
	}

	public static PhotoDetailLikesFragment newInstance(MediaObject photo) {
		PhotoDetailLikesFragment f = new PhotoDetailLikesFragment();
		final Bundle bundle = new Bundle();
		bundle.putSerializable(IConstants.DETAIL_PAGE_PHOTO_ARG_KEY, photo);
		f.setArguments(bundle);
		return f;
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		Bundle bundle = this.getArguments();
		mCurrentPhoto = (MediaObject) bundle
				.getSerializable(IConstants.DETAIL_PAGE_PHOTO_ARG_KEY);

		this.setRetainInstance(true);

	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		View v = inflater.inflate(R.layout.ig_like_users, null);

		mProgressBar = (ProgressBar) v.findViewById(R.id.ig_like_progress_bar);
		mNoLikesText = (TextView) v.findViewById(R.id.ig_no_like_text);

		GridView grid = (GridView) v.findViewById(R.id.ig_like_grid);
		LikesListAdapter adapter = new LikesListAdapter(getActivity(),
				mCurrentPhoto, mAuthors, mImageFetcher);
		grid.setAdapter(adapter);
		grid.setOnItemClickListener(this);
		loadLikes(adapter);

		return v;
	}

	private void loadLikes(final LikesListAdapter adapter) {

		IGeneralTaskDoneListener<List<Author>> lis = new IGeneralTaskDoneListener<List<Author>>() {

			@Override
			public void onTaskDone(List<Author> result) {
				mProgressBar.setVisibility(View.INVISIBLE);
				if (result == null || result.isEmpty()) {
					mAuthors.clear();
					mNoLikesText.setVisibility(View.VISIBLE);
					adapter.notifyDataSetChanged();
					return;
				}
				mAuthors.clear();
				mAuthors.addAll(result);
				adapter.notifyDataSetChanged();
			}

		};

		String photoId = mCurrentPhoto.getId();

		AbstractGeneralTask<String, Integer, List<Author>> task = null;
		switch (mCurrentPhoto.getMediaSource()) {
		case INSTAGRAM:
			task = new InstagramLoadLikesTask(getActivity());
			break;
		case FLICKR:
			task = new GetFlickrPhotoFavUsersTask();
			break;
		case PX500:
			break;
		}
		task.addTaskDoneListener(lis);
		task.execute(photoId);

	}

	@SuppressLint("SimpleDateFormat")
	private static class LikesListAdapter extends BaseAdapter {

		private Context			mContext;
		private ImageLoader		mFetcher;
		private List<Author>	mLikeUsers;
		private MediaObject		mCurrentPhoto;

		LikesListAdapter(Context context, MediaObject photo,
				List<Author> mAuthors, ImageLoader fetcher) {
			mContext = context;
			mFetcher = fetcher;
			mLikeUsers = mAuthors;
			this.mCurrentPhoto = photo;
		}

		@Override
		public int getCount() {
			return mLikeUsers.size();
		}

		@Override
		public Object getItem(int position) {
			return mLikeUsers.get(position);
		}

		@Override
		public long getItemId(int position) {
			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			View v = convertView;
			if (v == null) {
				v = LayoutInflater.from(mContext).inflate(
						R.layout.photo_detail_ig_like_item, null);
			}

			ImageView avatorImage = (ImageView) v
					.findViewById(R.id.detail_ig_like_avator);
			TextView txtUserName = (TextView) v
					.findViewById(R.id.detail_ig_like_user_name);
			Author user = (Author) getItem(position);
			txtUserName.setText(user.getUserName() == null ? user
					.getBuddyIconUrl() : user.getUserName());

			loadAvator(mCurrentPhoto, user, avatorImage);
			return v;
		}

		private void loadAvator(MediaObject photo, Author user, ImageView image) {
			MediaSourceType type = photo.getMediaSource();
			switch (type) {
			case INSTAGRAM:
				String buddyIcon = user.getBuddyIconUrl();
				DisplayImageOptions imageDisplayOptions = new DisplayImageOptions.Builder()
						.showStubImage(R.drawable.empty_photo).cacheInMemory()
						.imageScaleType(ImageScaleType.IN_SAMPLE_POWER_OF_2)
						.bitmapConfig(Bitmap.Config.RGB_565).build();
				mFetcher.displayImage(buddyIcon, image, imageDisplayOptions);
				break;
			case FLICKR:
				FetchFlickrUserIconUrlTask task = new FetchFlickrUserIconUrlTask(
						mContext, user.getUserId());
				task.execute(image);
				break;
			case PX500:
				break;
			}
		}

	}

	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position,
			long id) {
		Author user = (Author) parent.getAdapter().getItem(position);
		PhotoDetailActivity act = (PhotoDetailActivity) getActivity();
		act.showUserPhotos(user);

	}
}