Initial commit

lib/assets/javascripts/builder/routes/populate-route.js

@@ -0,0 +1,51 @@
+function matchArg (haystack, args) {
+  var argMatch = haystack.match(/:(.+)/);
+  if (argMatch === null) {
+    throw new Error('Malformed argument: ' + haystack);
+  }
+
+  var argName = argMatch[1];
+  var argValue = args[argName];
+
+  if (argValue === undefined) {
+    throw new Error('No value provided for argument: ' + argName);
+  }
+
+  return haystack.replace(':' + argName, argValue);
+}
+
+function findArg (haystack) {
+  var argMatch = haystack.match(/:(.+)/);
+  return argMatch === null ? null : argMatch[1];
+}
+
+module.exports = function (route, args) {
+  var optionalMatch = route.match(/\(.+\)+/);
+  var optionalArg = optionalMatch !== null ? optionalMatch[0] : null;
+  var cleanRoute = optionalArg !== null ? route.replace(optionalArg, '') : route;
+
+  // Return route without optional arguments if no args were provided
+  if (!args) return cleanRoute;
+
+  // Find out if there's an optional argument provided, and if so, turn it into a regular one
+  if (optionalArg !== null) {
+    // Replace ( and ) with nothing, need the g to apply throughout the string
+    optionalArg = optionalArg.replace(/\(|\)/g, '');
+    var optionalArgName = findArg(optionalArg);
+
+    if (args[optionalArgName]) {
+      // append the optional arg without parenthesis
+      cleanRoute += optionalArg.replace(/\(|\)/g, '');
+    }
+  }
+
+  return cleanRoute
+    // Split all url arguments
+    .split(/(:[^\/]+)/g)
+    // replace all arguments with the provided value
+    .map(function (fragment) {
+      return fragment.indexOf(':') === 0 ? matchArg(fragment, args) : fragment;
+    })
+    // join them again
+    .join('');
+};