Adds hasMore and reset for AV.SearchQuery.

Author: killme2008

lib/search.js

@@ -196,6 +196,26 @@ module.exports = function(AV) {
        return json;
     },
 
+    /**
+     * Returns true when there are more documents can be retrieved by this
+     * query instance, you can call find function to get more results.
+     * @see AV.SearchQuery#find
+     * @return {Boolean}
+     */
+    hasMore: function() {
+      return !this._hitEnd;
+    },
+
+    /**
+     * Reset current query instance state(such as sid, hits etc) except params
+     * for a new searching. After resetting, hasMore() will return true.
+     */
+    reset: function() {
+      this._hitEnd = false;
+      this._sid = null;
+      this._hits = 0;
+    },
+
     /**
      * Retrieves a list of AVObjects that satisfy this query.
      * Either options.success or options.error is called when the find
@@ -216,6 +236,9 @@ module.exports = function(AV) {
         if(response.sid) {
           self._oldSid = self._sid;
           self._sid = response.sid;
+        } else {
+          self._sid = null;
+          self._hitEnd = true;
         }
         self._hits = response.hits || 0;