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# -*- coding: utf-8 -*- |
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"""A collection of functions for Page CMS""" |
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import re |
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import unicodedata |
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from django.conf import settings as django_settings |
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from django.utils import timezone |
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from django.template import Context |
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from django import template |
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from django.utils.encoding import force_text |
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from django.utils.safestring import SafeText, mark_safe |
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from django.utils.functional import allow_lazy |
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from django.utils import six |
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from datetime import datetime |
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dummy_context = Context() |
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def get_now(): |
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if django_settings.USE_TZ: |
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return datetime.utcnow().replace(tzinfo=timezone.utc) |
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else: |
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return datetime.now() |
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def get_placeholders(template_name): |
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"""Return a list of PlaceholderNode found in the given template. |
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:param template_name: the name of the template file |
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""" |
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dummy_context.template = template.Template("") |
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try: |
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temp_wrapper = template.loader.get_template(template_name) |
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except template.TemplateDoesNotExist: |
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return [] |
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plist, blist = [], [] |
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temp = temp_wrapper.template |
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_placeholders_recursif(temp.nodelist, plist, blist) |
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previous = {} |
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block_to_remove = [] |
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for block in blist: |
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if block.name in previous: |
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if not hasattr(block, 'has_super_var'): |
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block_to_remove.append(previous[block.name]) |
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previous[block.name] = block |
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def keep(p): |
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return p.found_in_block not in block_to_remove |
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placeholders = [p for p in plist if keep(p)] |
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names = [] |
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pfiltered = [] |
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for p in placeholders: |
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if p.ctype not in names: |
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pfiltered.append(p) |
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names.append(p.ctype) |
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return pfiltered |
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def _placeholders_recursif(nodelist, plist, blist): |
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"""Recursively search into a template node list for PlaceholderNode |
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node.""" |
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# I needed to do this lazy import to compile the documentation |
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from django.template.loader_tags import BlockNode |
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if len(blist): |
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block = blist[-1] |
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else: |
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block = None |
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for node in nodelist: |
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if isinstance(node, BlockNode): |
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if node not in blist: |
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blist.append(node) |
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if not block: |
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block = node |
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if block: |
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if isinstance(node, template.base.VariableNode): |
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if(node.filter_expression.var.var == u'block.super'): |
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block.has_super_var = True |
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# extends node? |
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if hasattr(node, 'parent_name'): |
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# I do not know why I did this... but the tests are guarding it |
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dummy_context2 = Context() |
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dummy_context2.template = template.Template("") |
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_placeholders_recursif(node.get_parent(dummy_context2).nodelist, |
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plist, blist) |
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# include node? |
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elif hasattr(node, 'template') and hasattr(node.template, 'nodelist'): |
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_placeholders_recursif(node.template.nodelist, plist, blist) |
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# Is it a placeholder? |
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if hasattr(node, 'page') and hasattr(node, 'parsed') and \ |
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hasattr(node, 'as_varname') and hasattr(node, 'name') \ |
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and hasattr(node, 'section'): |
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if block: |
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node.found_in_block = block |
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plist.append(node) |
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node.render(dummy_context) |
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for key in ('nodelist', 'nodelist_true', 'nodelist_false'): |
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if hasattr(node, key): |
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try: |
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_placeholders_recursif(getattr(node, key), plist, blist) |
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except: |
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pass |
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def normalize_url(url): |
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"""Return a normalized url with trailing and without leading slash. |
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>>> normalize_url(None) |
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'/' |
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>>> normalize_url('/') |
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'/' |
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>>> normalize_url('/foo/bar') |
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'/foo/bar' |
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>>> normalize_url('foo/bar') |
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'/foo/bar' |
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>>> normalize_url('/foo/bar/') |
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'/foo/bar' |
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""" |
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if not url or len(url) == 0: |
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return '/' |
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if not url.startswith('/'): |
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url = '/' + url |
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if len(url) > 1 and url.endswith('/'): |
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url = url[0:len(url) - 1] |
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return url |
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def slugify(value, allow_unicode=False): |
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""" |
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Convert to ASCII if 'allow_unicode' is False. Convert spaces to hyphens. |
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Remove characters that aren't alphanumerics, underscores, or hyphens. |
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Convert to lowercase. Also strip leading and trailing whitespace. |
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Copyright: https://docs.djangoproject.com/en/1.9/_modules/django/utils/text/#slugify |
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TODO: replace after stopping support for Django 1.8 |
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""" |
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value = force_text(value) |
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if allow_unicode: |
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value = unicodedata.normalize('NFKC', value) |
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value = re.sub('[^\w\s-]', '', value, flags=re.U).strip().lower() |
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return mark_safe(re.sub('[-\s]+', '-', value, flags=re.U)) |
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value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore').decode('ascii') |
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value = re.sub('[^\w\s-]', '', value).strip().lower() |
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return mark_safe(re.sub('[-\s]+', '-', value)) |
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slugify = allow_lazy(slugify, six.text_type, SafeText) |
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batiste /
django-page-cms
