Initial commit, added all backend files

web/dart/parse_sitemap.dart

@@ -0,0 +1,43 @@
+import 'dart:html' show HttpRequest;
+
+import 'package:html/parser.dart' show parse;
+import 'package:html/dom.dart' show Element;
+
+// Get the sitemap content
+Future<String> getSitemap() async {
+  const path = 'sitemap.html';
+  try {
+    return await HttpRequest.getString(path);
+  } catch (e) {
+    print('Couldn’t open $path');
+  }
+  return 'Error';
+}
+
+// Parse the list of elements and detect pages from this list
+Map<String, String> detectPages(List<Element> sitemap, [String prefix]) {
+  final links = <String, String>{};
+  for (var elem in sitemap) {
+    if (elem.outerHtml.contains('index')) {
+      continue;
+    } else if (elem.innerHtml.startsWith('<a')) {
+      elem = elem.firstChild;
+      final url = elem.attributes['href'];
+      final text = elem.firstChild.text;
+      links[url] = (prefix == null) ? text : '$text ($prefix)';
+    } else {
+      final prefix = elem.firstChild.text;
+      final ul = elem.children[0].children;
+      links.addAll(detectPages(ul, prefix));
+    }
+  }
+  return links;
+}
+
+// This function returns a Map which contains all links to languages detected
+// from the sitemap.
+Future<Map<String, String>> parseSitemap() async {
+  final content = await getSitemap();
+  final sitemap = parse(content).getElementsByClassName('org-ul')[0].children;
+  return detectPages(sitemap);
+}