Fixes #68 - Add email spam protection for privacy email address on /privacy

static/js/address-masking.js

Index: static/js/address-masking.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/static/js/address-masking.js
@@ -0,0 +1,39 @@
+/*!
+ * This file is part of website-defaults
+ * Copyright (C) 2016-present eyeo GmbH
+ *
+ * website-defaults is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * website-defaults is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with website-defaults.  If not, see <http://www.gnu.org/licenses/>.
+ */
+var ADDRESS_MASKING_DELAY = 250;
+
+function unmaskAddress(target)
+{
+  var attributes = JSON.parse(target.getAttribute("data-mask"));
+
+  for (var attr in attributes)
+    target[attr] = atob(attributes[attr]);
+
+  target.removeAttribute("data-mask");
+}
+
+document.addEventListener("DOMContentLoaded", function()
+{
+  var unmaskAfterTimeout = setTimeout.bind(
+    this,
+    unmaskAddress,
+    ADDRESS_MASKING_DELAY
+  );
+
+  document.querySelectorAll("[data-mask]").forEach(unmaskAddress);
+});