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"""
Heap 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
HEAP_TRACKER_ID_RE = re.compile(r'^\d+$')
TRACKING_CODE = """
<script>
window.heap=window.heap||[],heap.load=function(e,t){window.heap.appid=e,window.heap.config=t=t||{};var r=document.createElement("script");r.type="text/javascript",r.async=!0,r.src="https://cdn.heapanalytics.com/js/heap-"+e+".js";var a=document.getElementsByTagName("script")[0];a.parentNode.insertBefore(r,a);for(var n=function(e){return function(){heap.push([e].concat(Array.prototype.slice.call(arguments,0)))}},p=["addEventProperties","addUserProperties","clearEventProperties","identify","resetIdentity","removeEventProperty","setEventProperties","track","unsetEventProperty"],o=0;o<p.length;o++)heap[p[o]]=n(p[o])};
heap.load("%(tracker_id)s");
</script>
""" # noqa
register = Library()
def _validate_no_args(token):
bits = token.split_contents()
if len(bits) > 1:
raise TemplateSyntaxError("'%s' takes no arguments" % bits[0])
@register.tag
def heap(parser, token):
"""
Heap tracker template tag.
Renders Javascript code to track page visits. You must supply
your heap tracker ID (as a string) in the ``HEAP_TRACKER_ID``
setting.
"""
_validate_no_args(token)
return HeapNode()
class HeapNode(Node):
def __init__(self):
self.tracker_id = get_required_setting(
'HEAP_TRACKER_ID', HEAP_TRACKER_ID_RE, 'must be an numeric string'
)
def render(self, context):
html = TRACKING_CODE % {'tracker_id': self.tracker_id}
if is_internal_ip(context, 'HEAP'):
html = disable_html(html, 'Heap')
return html
def contribute_to_analytical(add_node):
HeapNode() # ensure properly configured
add_node('head_bottom', HeapNode)
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