Add plugin to obfuscate email

Author: imorlxs

_includes/team-profile.html

@@ -18,7 +18,7 @@ <h1>{{ member.name }}</h1>
 <p> {{ member.responsibilities | markdownify | remove: '<p>' | remove: '</p>'}} </p>
 {% endif %}
 {% if member.email %}
-  <i>email: <{{ member.email }}></i>
+  <i>email: <{{ member.email | mailObfuscate }}></i>
 {% endif %}
 {% if member.education %}
 <p> <strong>Education:</strong> {{ member.education }} </p>

_plugins/mail_obfuscate.rb

@@ -0,0 +1,17 @@
+require "base64"
+require "uri"
+
+module ObfuscateMailAddress
+  def mailObfuscate(input)
+    base64Mail = Base64.strict_encode64(Addressable::URI.encode(input))
+
+    # See http://techblog.tilllate.com/2008/07/20/ten-methods-to-obfuscate-e-mail-addresses-compared/
+    output = "<a href=\"#\" "
+    output += "data-contact=\"#{base64Mail}\" target=\"_blank\" "
+    output += "onfocus=\"this.href = 'mailto:' + atob(this.dataset.contact)\">"
+    output += "<script type=\"text/javascript\">document.write(atob(\"#{base64Mail}\"));</script></a>"
+    return output
+  end
+end
+
+Liquid::Template.register_filter(ObfuscateMailAddress)