from django import template
from dss import settings

register = template.Library()


class ShowGoogleAnalyticsJS(template.Node):
    def render(self, context):
        code = getattr(settings, "GOOGLE_ANALYTICS_CODE", False)
        if not code:
            return "<!-- Google Analytics not included because you haven't set the settings.GOOGLE_ANALYTICS_CODE variable! -->"

        if 'user' in context and context['user'] and context['user'].is_staff:
            return "<!-- Google Analytics not included because you are a staff user! -->"

        if settings.DEBUG:
            return "<!-- Google Analytics not included because you are in Debug mode! -->"

        return """<script>(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
ga('create', '""" + str(code) + """', 'auto');
ga('send', 'pageview');
</script>"""