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"""
Analytical template tags and filters.
"""
import logging
from importlib import import_module
from django import template
from django.template import Node, TemplateSyntaxError
from analytical.utils import AnalyticalException
TAG_LOCATIONS = ['head_top', 'head_bottom', 'body_top', 'body_bottom']
TAG_POSITIONS = ['first', None, 'last']
TAG_MODULES = [
'analytical.chartbeat',
'analytical.clickmap',
'analytical.clicky',
'analytical.crazy_egg',
'analytical.facebook_pixel',
'analytical.gauges',
'analytical.google_analytics',
'analytical.google_analytics_js',
'analytical.google_analytics_gtag',
'analytical.gosquared',
'analytical.heap',
'analytical.hotjar',
'analytical.hubspot',
'analytical.intercom',
'analytical.kiss_insights',
'analytical.kiss_metrics',
'analytical.luckyorange',
'analytical.matomo',
'analytical.mixpanel',
'analytical.olark',
'analytical.optimizely',
'analytical.performable',
'analytical.rating_mailru',
'analytical.snapengage',
'analytical.spring_metrics',
'analytical.uservoice',
'analytical.woopra',
'analytical.yandex_metrica',
]
logger = logging.getLogger(__name__)
register = template.Library()
def _location_tag(location):
def analytical_tag(parser, token):
bits = token.split_contents()
if len(bits) > 1:
raise TemplateSyntaxError("'%s' tag takes no arguments" % bits[0])
return AnalyticalNode(location)
return analytical_tag
for loc in TAG_LOCATIONS:
register.tag('analytical_%s' % loc, _location_tag(loc))
class AnalyticalNode(Node):
def __init__(self, location):
self.nodes = [node_cls() for node_cls in template_nodes[location]]
def render(self, context):
return ''.join([node.render(context) for node in self.nodes])
def _load_template_nodes():
template_nodes = {loc: {pos: [] for pos in TAG_POSITIONS} for loc in TAG_LOCATIONS}
def add_node_cls(location, node, position=None):
template_nodes[location][position].append(node)
for path in TAG_MODULES:
module = _import_tag_module(path)
try:
module.contribute_to_analytical(add_node_cls)
except AnalyticalException as e:
logger.debug("not loading tags from '%s': %s", path, e)
for location in TAG_LOCATIONS:
template_nodes[location] = sum(
(template_nodes[location][p] for p in TAG_POSITIONS), []
)
return template_nodes
def _import_tag_module(path):
app_name, lib_name = path.rsplit('.', 1)
return import_module('%s.templatetags.%s' % (app_name, lib_name))
template_nodes = _load_template_nodes()
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