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gaia/apps/calendar/js/utils/uri.js

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+define(function(require, exports) {
+'use strict';
+
+/**
+ * Get the port of the url.
+ * @param {string} url full url.
+ * @return {?number} port number, null if none found.
+ */
+exports.getPort = function(url) {
+  var parts = url.split(':');
+  if (parts.length < 2) {
+    return null;
+  }
+
+  // If we found a port and path, it's the last part
+  var candidate = parts[parts.length - 1];
+  parts = candidate.split('/');
+
+  // If we found a port, it's the first part
+  candidate = parts[0];
+  if (!isInteger(candidate)) {
+    return null;
+  }
+
+  return parseInt(candidate, 10);
+};
+
+/**
+ * Get the scheme of the url. Note that this only detects http and https.
+ * @param {string} url full url.
+ * @return {?string} uri scheme (ie http), null if none found.
+ */
+exports.getScheme = function(url) {
+  var parts = url.split(':');
+  if (parts.length < 2) {
+    return null;
+  }
+
+
+  // If we found a scheme, it's the first part
+  var candidate = parts[0];
+  if (candidate !== 'http' && candidate !== 'https') {
+    return null;
+  }
+
+  return candidate;
+};
+
+/**
+ * Decide whether or not this string represents an integer.
+ * @param {string} str some string.
+ * @param {boolean} whether or not str represents an integer.
+ */
+function isInteger(str) {
+  return (/^\d+$/).test(str);
+}
+
+});