Angular.jsのコントローラーの処理の分割に関して

otorecoApp.controller('NewSongListCtrl', ['$scope', '$http', '$sce', function($scope, $http, $sce) {
  $scope.newSongs = [];
  $http({method: 'GET', url: 'top/getNewSongs'}).
    success(function(data, status, headers, config) {
      for(var i = 0; i < data.length; i++) {
        $scope.newSongs.push(
          {
            songName: data[i].Song.name,
            artistName: data[i].Artist.name,
            songNameForSearch: optimize(data[i].Song.name),
            artistNameForSearch: optimize(data[i].Artist.name),
            artistId: data[i].Artist.id,
            naturalLow: returnPitchName(data[i].Song.natural_low),
            naturalHigh: returnPitchName(data[i].Song.natural_high),
            falsettoLow: returnPitchName(data[i].Song.falsetto_low),
            falsettoHigh: returnPitchName(data[i].Song.falsetto_high)
          }
        );
      }
    }).
    error(function(data, status, headers, config) {
      console.log(status);
    });

    $scope.search = function(index) {
      $scope.searchResults = [];
      $scope.googleUrl = [];
      artistName = $scope.newSongs[index].artistNameForSearch;
      songName = $scope.newSongs[index].songNameForSearch;
      $http({method: 'GET', url: 'http://gdata.youtube.com/feeds/api/videos?vq=' + artistName + ' ' + songName + '&max-results=10&alt=json'}).
        success(function(data, status, headers, config) {
          $scope.googleUrl.push({url: 'www.google.co.jp/#q=' + artistName + ' ' + songName + '歌詞&qscrl=1'});
          for(var i = 0; i < 4; i++) {
            var rs = data.feed.entry[i].link[0].href.match(/http:\/\/www\.youtube\.com\/watch\?v=(.*?)&feature=youtube_gdata/);
            $scope.searchResults.push(
              {
                artistName: artistName,
                songName: songName,
                movieTitle: data.feed.entry[i].title.$t,
                movieUrl: $sce.trustAsResourceUrl('http://www.youtube.com/embed/' + rs[1] + '?rel=1&fs=1')
              }
            );
          }
        }).error(function(data, status, headers, config) {
          console.log(status);
        });
    }
}]);