fireproof/snapshot.js

Promises for Firebase objects.

    'use strict';

    FireproofSnapshot.prototype.ref = ref;
    FireproofSnapshot.prototype.child = child;
    FireproofSnapshot.prototype.forEach = forEach;
    FireproofSnapshot.prototype.exists = proxy('exists');
    FireproofSnapshot.prototype.val = proxy('val');
    FireproofSnapshot.prototype.hasChild = proxy('hasChild');
    FireproofSnapshot.prototype.hasChildren = proxy('hasChildren');
    FireproofSnapshot.prototype.numChildren = proxy('numChildren');
    FireproofSnapshot.prototype.getPriority = proxy('getPriority');
    FireproofSnapshot.prototype.exportVal = proxy('exportVal');
    FireproofSnapshot.prototype.key = proxy('key');
    FireproofSnapshot.prototype.name = proxy('name');

    function FireproofSnapshot(snap) {
      this._snap = snap;
    }

    function proxy(name) {
      
      var self = this;
      return function() {
        self._snap[name].apply(self._snap, arguments);
      };

    }

    function ref() {
      return new Fireproof(this._snap.ref());
    }

    function child(childPath) {
      return new FireproofSnapshot(this._snap.child(childPath));
    }

    function forEach(childAction) {

      this._snap.forEach(function(childSnap) {
        return childAction(new FireproofSnapshot(childSnap));
      });

    }