def _set_url(self, json):
     self.url = None
     if json.has_key('trackViewUrl'):
         self.url = json['trackViewUrl']
     elif json.has_key('collectionViewUrl'):
         self.url = json['collectionViewUrl']
     elif json.has_key('artistViewUrl'):
         self.url = json['artistViewUrl']

 def _set_artwork(self, json):
     self.artwork = dict()
     if json.has_key('artworkUrl30'):
         self.artwork['30'] = json['artworkUrl30']
     if json.has_key('artworkUrl60'):
         self.artwork['60'] = json['artworkUrl60']
     if json.has_key('artworkUrl100'):
         self.artwork['100'] = json['artworkUrl100']
     if json.has_key('artworkUrl512'):
         self.artwork['512'] = json['artworkUrl512']

    def _set(self, json):
        super(Track, self)._set(json)
        # Track information
        self.name = json['trackName']
        self.url = json.get('trackViewUrl', None)
        self.preview_url = json.get('previewUrl', None)
        self.price = None
        if json.has_key('trackPrice') and json['trackPrice'] is not None:
            self.price = round(json['trackPrice'], 4)
        self.number = json.get('trackNumber', None)
        self.duration = None
        if json.has_key('trackTimeMillis') and json['trackTimeMillis'] is not None:
            self.duration = round(json.get('trackTimeMillis', 0.0)/1000.0, 2)

        self._set_artist(json)
        self._set_album(json)

    def get(self):
        self._json_results = self._request(cacheable=is_caching_enabled())
        if self._json_results.has_key('errorMessage'):
            raise ServiceException(type='Error', message=self._json_results['errorMessage'])
        self._num_results = self._json_results['resultCount']
        l = []
        for json in self._json_results['results']:
            type = None
            if json.has_key('wrapperType'):
                type = json['wrapperType']
            elif json.has_key('kind'):
                type = json['kind']

            if type == 'artist':
                id = json['artistId']
                item = Artist(id)
            elif type == 'collection':
                id = json['collectionId']
                item = Album(id)
            elif type == 'track':
                id = json['trackId']
                item = Track(id)
            elif type == 'audiobook':
                id = json['collectionId']
                item = Audiobook(id)
            elif type == 'ebook':
                id = json['trackId']
                item = Ebook(id)
            elif type == 'software':
                id = json['trackId']
                item = Software(id)
            else:
                if json.has_key('collectionId'):
                    id = json['collectionId']
                elif json.has_key('artistId'):
                    id = json['artistId']
                item = Item(id)
            item._set(json)
            l.append(item)
        return l

 def _set(self, json):
     self.json = json
     #print json
     if json.has_key('kind'):
         self.type = json['kind']
     else:
         self.type = json['wrapperType']
     # Item information
     self._set_genre(json)
     self._set_release(json)
     self._set_country(json)
     self._set_artwork(json)
     self._set_url(json)

    def __init__(self, id=None, json=None, username=None, token=None):
        self.id = id
        self._json = json
        self._username = username
        self._token = token

        # Map given repo id to gist id if none exists
        if self._json:
            self.id = json["repo"] if json.has_key("repo") else json["id"]

        self.url = url = GIST_BASE % self.id
        self.embed_url = url + ".js"
        self.epic_embed_url = url + ".pibb"
        self.json_url = url + ".json"
        self.post_url = GIST_BASE % "gists/%s" % self.id

 def _simplify_json(self, json):
     result = {}
     # First, resolve references
     for element in json.values():
         for k,v in element.items():
             if isinstance(v, unicode) and v.startswith("http://") and json.has_key(v):
                 element[k] = json[v]
     for k, v in json.items():
         if v.has_key("_typeGroup"):
             group = v["_typeGroup"]
             if not result.has_key(group):
                 result[group]=[]
             del v["_typeGroup"]
             v["__reference"] = k
             result[group].append(v)
     return result

 def _set_album(self, json):
     if json.has_key('collectionId'):
         id = json['collectionId']
         self.album = Album(id)
         self.album._set(json)

 def _set_release(self, json):
     self.release_date = None
     if json.has_key('releaseDate') and json['releaseDate']:
         self.release_date = json['releaseDate'].split('T')[0]

 def _set_current_version_release_date(self, json):
     self.current_version_release_date = None
     if json.has_key('currentVersionReleaseDate') and json['currentVersionReleaseDate']:
         self.current_version_release_date = datetime.datetime.strptime( json['currentVersionReleaseDate'], r'%Y-%m-%dT%H:%M:%SZ' )