content: /*
   * Copyright 2013 Chris Banes
   *
   * 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.zhaojian.jolly.utils;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashSet;
  
  import android.content.Context;
  import android.database.Cursor;
  import android.net.Uri;
  import android.provider.MediaStore.Images;
  import android.provider.MediaStore.Images.ImageColumns;
  import android.util.Log;
  
  import com.zhaojian.jolly.model.MediaStoreBucket;
  import com.zhaojian.jolly.model.PhotoUpload;
  
  public class MediaStoreCursorHelper {
  
  	public static final String[] PHOTOS_PROJECTION = { Images.Media._ID,
  			Images.Media.MINI_THUMB_MAGIC, Images.Media.DATA,
  			Images.Media.BUCKET_DISPLAY_NAME, Images.Media.BUCKET_ID,
  			Images.Media.SIZE };
  	public static final String PHOTOS_ORDER_BY = Images.Media.DATE_ADDED
  			+ " desc";
  
  	public static final Uri MEDIA_STORE_CONTENT_URI = Images.Media.EXTERNAL_CONTENT_URI;
  
  	public static ArrayList<PhotoUpload> photosCursorToSelectionList(
  			Uri contentUri, Cursor cursor) {
  		ArrayList<PhotoUpload> items = new ArrayList<PhotoUpload>(
  				cursor.getCount());
  		PhotoUpload item;
  
  		if (cursor.moveToFirst()) {
  			do {
  				try {
  					item = photosCursorToSelection(contentUri, cursor);
  					if (null != item) {
  						items.add(item);
  					}
  				} catch (Exception e) {
  					e.printStackTrace();
  				}
  			} while (cursor.moveToNext());
  		}
  
  		// Need to reset the List so that oldest is first
  		Collections.reverse(items);
  
  		return items;
  	}
  
  	public static PhotoUpload photosCursorToSelection(Uri contentUri,
  			Cursor cursor) {
  		PhotoUpload item = null;
  
  		try {
  			File file = new File(cursor.getString(cursor
  					.getColumnIndexOrThrow(ImageColumns.DATA)));
  			if (file.exists()) {
  				item = PhotoUpload
  						.getSelection(contentUri, cursor.getInt(cursor
  								.getColumnIndexOrThrow(ImageColumns._ID)));
  			}
  		} catch (Exception e) {
  			e.printStackTrace();
  		}
  
  		return item;
  	}
  
  	public static void photosCursorToBucketList(Cursor cursor,
  			ArrayList<MediaStoreBucket> items) {
  		final HashSet<String> bucketIds = new HashSet<String>();
  
  		final int idColumn = cursor.getColumnIndex(ImageColumns.BUCKET_ID);
  		final int nameColumn = cursor
  				.getColumnIndex(ImageColumns.BUCKET_DISPLAY_NAME);
  		final int dataColumn = cursor.getColumnIndex(ImageColumns.SIZE);
  		if (cursor.moveToFirst()) {
  			do {
  				try {
  					final String bucketId = cursor.getString(idColumn);
  					final long size = cursor.getLong(dataColumn);
  					File file = new File(cursor.getString(cursor
  							.getColumnIndexOrThrow(ImageColumns.DATA)));
  					if (file.exists()) {
  						if (bucketIds.add(bucketId)) {
  							items.add(new MediaStoreBucket(bucketId, cursor
  									.getString(nameColumn)));
  						}
  					}
  				} catch (Exception e) {
  					e.printStackTrace();
  				}
  			} while (cursor.moveToNext());
  		}
  	}
  
  	public static Cursor openPhotosCursor(Context context, Uri contentUri) {
  		return context.getContentResolver().query(contentUri,
  				PHOTOS_PROJECTION, null, null, PHOTOS_ORDER_BY);
  	}
  
  }
  