import requests


class SteamApps:
    __instance = None

    @staticmethod
    def get_instance():
        """ Static access method. """
        if not SteamApps.__instance:
            SteamApps()
        return SteamApps.__instance

    def __init__(self):
        """ Virtually private constructor. """
        if SteamApps.__instance:
            raise Exception("This class is a singleton!")
        else:
            SteamApps.__instance = self

            # Load steam appid <-> game list
            r = requests.get("http://api.steampowered.com/ISteamApps/GetAppList/v0002/?format=json")

            if r.status_code == 200:
                self.glist = r.json()
            else:
                self.glist = None

    def appid2game(self, appid):
        for game in self.glist["applist"]["apps"]:
            if appid == game["appid"]:
                return game