1 files changed, 71 insertions, 0 deletions
diff --git a/bootstrap/comments/frontend/ajax.js b/bootstrap/comments/frontend/ajax.js
new file mode 100644
index 0000000..fdbdd06
--- /dev/null
+++ b/bootstrap/comments/frontend/ajax.js
@@ -0,0 +1,71 @@
+// Array of JSONP callbacks, starting with default error handler (ajax.js)
+HashOverConstructor.jsonp = [
+	function (json) { alert (json.message); }
+];
+
+// Send HTTP requests using either XMLHttpRequest or JSONP (ajax.js)
+HashOverConstructor.prototype.ajax = function (method, path, data, callback, async)
+{
+	// Check if the browser supports location origin
+	if (window.location.origin) {
+		// If so, use it as-is
+		var origin = window.location.origin;
+	} else {
+		// If not, construct origin manually
+		var protocol = window.location.protocol;
+		var hostname = window.location.hostname;
+		var port = window.location.port;
+
+		// Final origin
+		var origin = protocol + '//' + hostname + (port ? ':' + port : '');
+	}
+
+	// Create origin regular expression
+	var originRegex = new RegExp ('^' + origin + '/', 'i');
+
+	// Check if script is being remotely accessed
+	if (originRegex.test (this.constructor.script.src) === false) {
+		// If so, get constructor name
+		var source = this.constructor.toString ();
+		var constructor = source.match (/function (\w+)/)[1];
+
+		// Push callback into JSONP array
+		this.constructor.jsonp.push (callback);
+
+		// Add JSONP callback index and constructor to request data
+		data.push ('jsonp=' + (this.constructor.jsonp.length - 1));
+		data.push ('jsonp_object=' + constructor || 'HashOver');
+
+		// Create request script
+		var request = this.elements.create ('script', {
+			src: path + '?' + data.join ('&'),
+			async: async
+		});
+
+		// And append request script to page
+		document.body.appendChild (request);
+	} else {
+		// If not, create AJAX request
+		var request = new XMLHttpRequest ();
+
+		// Set callback as ready state change handler
+		request.onreadystatechange = function ()
+		{
+			// Do nothing if request wasn't successful in a meaningful way
+			if (this.readyState !== 4 || this.status !== 200) {
+				return;
+			}
+
+			// Parse response as JSON
+			var json = JSON.parse (this.responseText);
+
+			// Execute callback
+			callback.apply (this, [ json ]);
+		};
+
+		// And send request
+		request.open (method, path, async);
+		request.setRequestHeader ('Content-type', 'application/x-www-form-urlencoded');
+		request.send (data.join ('&'));
+	}
+};