store.js

Store = function(client) {
  return {
    run: function(method, params, callback) {
      var modifiedCallback = function(error, result) {
        callback(result);
      };
      params.push(modifiedCallback);
      client[method].apply(client, params);
    },
    addBuddyWaiting: function(buddy, callback) {
      this.run('rpush', ['buddies', buddy], callback);
    },
    getBuddiesWaiting: function(callback) {
      this.run('lrange', ['buddies', 0, -1], callback);
    }
  };
};