Add custom functions support

src/index.litcoffee

@@ -69,11 +69,14 @@
 
         key = @alias[key] if @alias[key]
 
+        if @custom[key]
+          @custom[key] res, val
+
 If the value is empty we treat the query parameter as an
 [$exists](http://docs.mongodb.org/manual/reference/operator/query/exists/)
 operator.
 
-        if not val
+        else if not val
           res[key] = $exists: true
 
 Check for supported operators in `@ops`. This is configured when

test/suite.coffee

@@ -149,4 +149,23 @@ describe 'parse()', ->
     it 'should ingore multiple keys'
 
   describe 'custom', ->
+    it 'should enable built in bbox handler', ->
+      qs = new MongoQS custom: bbox: 'geojson'
+      assert.deepEqual qs.parse({bbox: '0,1,2,3'}), geojson:
+        $geoWithin:
+          $geometry:
+            type: 'Polygon'
+            coordinates: [[[0,1],[2,1],[2,3],[0,3],[0,1]]]
+
+    it 'should enable built in near handler', ->
+      qs = new MongoQS custom: near: 'geojson'
+      assert.deepEqual qs.parse({near: '0,1'}), geojson:
+        $near:
+          $geometry:
+            type: 'Point'
+            coordinates: [0,1]
+
+    it 'should enable build in after handler', ->
+      qs = new MongoQS custom: after: 'endret'
+      assert.deepEqual qs.parse({after: '2014-01-01'}), endret: $gte: '2014-01-01T00:00:00.000Z'