content: /*
   * Copyright (C) 2010-2014 The MPDroid Project
   *
   * 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.namelessdev.mpdroid.cover;
  
  import com.namelessdev.mpdroid.helpers.AlbumInfo;
  import com.namelessdev.mpdroid.helpers.CoverManager;
  
  import org.json.JSONArray;
  import org.json.JSONObject;
  
  import android.util.Log;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import static android.text.TextUtils.isEmpty;
  
  /**
   * Fetch cover from Spotify
   */
  public class SpotifyCover extends AbstractWebCover {
  
      private static final String TAG = "SpotifyCover";
  
      private static List<String> extractAlbumIds(final String response) {
          final JSONObject jsonRoot;
          final JSONArray jsonAlbums;
          JSONObject jsonAlbum;
          String albumId;
          final List<String> albumIds = new ArrayList<>();
  
          try {
              jsonRoot = new JSONObject(response);
              jsonAlbums = jsonRoot.optJSONArray("albums");
              if (jsonAlbums != null) {
                  for (int a = 0; a < jsonAlbums.length(); a++) {
                      jsonAlbum = jsonAlbums.optJSONObject(a);
                      if (jsonAlbum != null) {
                          albumId = jsonAlbum.optString("href");
                          if (albumId != null && !albumId.isEmpty()) {
                              albumId = albumId.replace("spotify:album:", "");
                              albumIds.add(albumId);
                          }
                      }
                  }
              }
          } catch (final Exception e) {
              if (CoverManager.DEBUG) {
                  Log.e(TAG, "Failed to get cover URL from Spotify.", e);
              }
          }
  
          return albumIds;
      }
  
      private static String extractImageUrl(final String response) {
  
          final JSONObject jsonAlbum;
          final String imageUrl;
  
          try {
              jsonAlbum = new JSONObject(response);
              imageUrl = jsonAlbum.optString("thumbnail_url");
              return imageUrl;
          } catch (final Exception e)
  
          {
              Log.e(TAG, "Failed to get cover URL from Spotify.", e);
          }
  
          return null;
      }
  
      @Override
      public String[] getCoverUrl(final AlbumInfo albumInfo) throws Exception {
  
          final String albumResponse;
          final List<String> albumIds;
          String coverResponse;
          String coverUrl;
  
          try {
              albumResponse = executeGetRequest("http://ws.spotify.com/search/1/album.json?q="
                      + albumInfo.getArtist() + ' ' + albumInfo.getAlbum());
              albumIds = extractAlbumIds(albumResponse);
              for (final String albumId : albumIds) {
                  coverResponse = executeGetRequest(
                          "https://embed.spotify.com/oembed/?url=http://open.spotify.com/album/"
                                  + albumId);
                  coverUrl = extractImageUrl(coverResponse);
                  if (!isEmpty(coverUrl)) {
                      coverUrl = coverUrl.replace("/cover/", "/640/");
                      return new String[]{
                              coverUrl
                      };
                  }
              }
  
          } catch (final Exception e) {
              Log.e(TAG, "Failed to get cover URL from Spotify.", e);
          }
  
          return new String[0];
      }
  
      @Override
      public String getName() {
          return "SPOTIFY";
      }
  }
  