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"""
Optimizely template tags and filters.
"""
import re
from django.template import Library, Node, TemplateSyntaxError
from analytical.utils import disable_html, get_required_setting, is_internal_ip
ACCOUNT_NUMBER_RE = re.compile(r'^\d+$')
SETUP_CODE = """<script src="//cdn.optimizely.com/js/%(account_number)s.js"></script>"""
register = Library()
@register.tag
def optimizely(parser, token):
"""
Optimizely template tag.
Renders Javascript code to set-up A/B testing. You must supply
your Optimizely account number in the ``OPTIMIZELY_ACCOUNT_NUMBER``
setting.
"""
bits = token.split_contents()
if len(bits) > 1:
raise TemplateSyntaxError("'%s' takes no arguments" % bits[0])
return OptimizelyNode()
class OptimizelyNode(Node):
def __init__(self):
self.account_number = get_required_setting(
'OPTIMIZELY_ACCOUNT_NUMBER',
ACCOUNT_NUMBER_RE,
"must be a string looking like 'XXXXXXX'",
)
def render(self, context):
html = SETUP_CODE % {'account_number': self.account_number}
if is_internal_ip(context, 'OPTIMIZELY'):
html = disable_html(html, 'Optimizely')
return html
def contribute_to_analytical(add_node):
OptimizelyNode() # ensure properly configured
add_node('head_top', OptimizelyNode)
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