Add reverse geocoding support. closes #25

README.md

@@ -10,12 +10,12 @@ Seamlessly integrate [Ziptastic!](https://www.getziptastic.com) with jQuery
 Can be used to query for a specific zip code.
 
 ```js
-$.ziptastic(48867, function(country, state, stateCode, city, zip) {
+$.ziptastic('US', 48867, 'your-api-key-here', function(country, state, stateCode, city, zip) {
   console.log(country, state, stateCode, city, zip);
 });
 ```
 
-#### Input Keyup Wrapper
+#### Input Keyup Wrapper with forward geocoding (postal code)
 
 ```js
 var duration = 500;
@@ -52,3 +52,15 @@ elements.zip.ziptastic(options)
     });
 });
 ```
+
+#### Using Reverse Geocoding
+
+Just set `reverseGeo` to `true` in the `options` object.
+
+```js
+var options = {
+    "key": "<your-api-key-here>",
+    "reverseGeo": true,
+    "country": "US"
+}
+```

demo.html

@@ -59,7 +59,7 @@
 
 					// Initialize the ziptastic and bind to the change of zip code
 					var options = {
-						"key": "",
+						"key": "your-api-key-here",
 						"country": "US"
 					}
 					elements.zip.ziptastic(options)

jquery.ziptastic.js

@@ -3,28 +3,27 @@
 	var zipValid = {
 		us: /[0-9]{5}(-[0-9]{4})?/
 	};
+    var protocol = '';
+    if (location.protocol == 'file:') {
+        protocol = 'https://';
+    } else {
+        protocol = location.protocol;
+    }
+	var referrer = document.location.origin + document.location.pathname;
 
-	$.ziptastic = function(country, zip, key, callback){
+ 	$.ziptastic = function(country, zip, key, callback) {
 		country = country || 'US';
-        if (!key) {
-            alert("Please register for an API key at GetZiptastic.com.");
-            return;
-        }
+		if (!key) {
+			alert("Please register for an API key at GetZiptastic.com.");
+			return;
+		}
 
 		country = country.toUpperCase();
 		if(!requests[country]) {
 			requests[country] = {};
 		}
 
 		if(!requests[country][zip]) {
-			var protocol = '';
-			if (location.protocol == 'file:') {
-				protocol = 'https://';
-			} else {
-				protocol = location.protocol;
-			}
-
-			var referrer = document.location.origin + document.location.pathname;
 			requests[country][zip] = $.ajax({
 				url: protocol + '//zip.getziptastic.com/v3/' + country + '/' + zip,
 				headers: {'x-referrer': referrer, 'x-key': key},
@@ -44,26 +43,64 @@
 
 					requests[country][zip] = data_temp[key];
 					callback(data_temp[key].country, data_temp[key].state,
-                             data_temp[key].state_short, data_temp[key].city, zip);
+							 data_temp[key].state_short, data_temp[key].city, zip);
 				}
 			});
 		}
 		// Allow for binding to the deferred object
 		return requests[country][zip];
 	};
 
+	$.reverseZiptastic = function(latitude, longitude, key, callback) {
+		var request = $.ajax({
+		   url: protocol + '//zip.getziptastic.com/v3/reverse/' + latitude + '/' + longitude + '/5000',
+		   headers: {'x-referrer': referrer, 'x-key': key},
+		   contentType: "application/json",
+		   type: 'GET',
+		   dataType: 'json',
+		   error: function(e) { console.log('There was an error. ' + e.message ); }
+	   });
+
+	   request.done(function(data) {
+		   if (typeof callback == 'function') {
+			   callback(data[0].country, data[0].state,
+						data[0].state_short, data[0].city, zip);
+		   }
+	   });
+	}
+
 	$.fn.ziptastic = function( options ) {
 		return this.each(function() {
 			var ele = $(this);
-			ele.on('keyup change', function() {
-				var zip = ele.val();
-				if(zipValid.us.test(zip)) {
-					$.ziptastic(options.country, zip, options.key, function(country, state, state_short, city) {
-						// Trigger the updated information
-						ele.trigger('zipChange', [country, state, state_short, city, zip]);
-					});
-				}
-			});
+            if (options.reverseGeo == true) {
+                var geoSuccess = function(position) {
+                    $.reverseZiptastic(position.coords.latitude, position.coords.longitude, options.key, function(country, state, state_short, city){
+                        ele.trigger('zipChange', [country, state, state_short, city, zip]);
+                    });
+                }
+
+                var geoError = function(e) {
+                    error(e);
+                }
+
+                if (navigator.geolocation) {
+                  navigator.geolocation.getCurrentPosition(geoSuccess, geoError);
+                } else {
+                   console.log('Geolocation is not supported by your browser.');
+                }
+
+            } else {
+
+    			ele.on('keyup change', function() {
+    				var zip = ele.val();
+        			if(zipValid.us.test(zip)) {
+        				$.ziptastic(options.country, zip, options.key, function(country, state, state_short, city) {
+        					// Trigger the updated information
+        					ele.trigger('zipChange', [country, state, state_short, city, zip]);
+        				});
+        			}
+    			});
+            }
 		});
 	};
 })( jQuery );