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74 lines
2.7 KiB
74 lines
2.7 KiB
"""
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collate_content.py
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==================
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(c) 2014 - Edward Stronge
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Connects to the content generator finalized signal to combine
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articles and pages sharing a category into lists that will be
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available in the template context.
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Thanks to #pelican member @kura for suggestions on creating this
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plugin.
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"""
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from collections import defaultdict
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import functools
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import re
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from pelican import signals
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def group_content(generator, content_type):
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"""
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Assembles articles and pages into lists based on each
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article or page's content. These lists are available
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through the global context passed to the template engine.
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When multiple categories are present, splits category names
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based on commas and trims whitespace surrounding a
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category's name. Thus, commas may not appear within a category
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but they can be used to delimit categories and may be surrounded by
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arbitrary amounts of whitespace.
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For each category, substitutes '_' for all whitespace and '-'
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characters, then creates a list named `SUBSTITUTED_CATEGORY_NAME`_articles
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or `SUBSTITUTED_CATEGORY_NAME`_pages for Articles or Pages,
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respectively.
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Note that the *original* category name must appear in the
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`CATEGORIES_TO_COLLATE` when using this plugin with category
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filtering enabled.
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"""
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category_filter = generator.settings.get('CATEGORIES_TO_COLLATE', None)
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filtering_active = type(category_filter) in (list, tuple, set)
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collations = generator.context.get('collations', defaultdict(list))
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for content in generator.context[content_type]:
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category_list = [c.strip() for c in content.category.name.split(',')]
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for category in category_list:
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if filtering_active and category not in category_filter:
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continue
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category = substitute_category_name(category)
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collations['%s_%s' % (category, content_type)].append(content)
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generator.context['collations'] = collations
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def substitute_category_name(category_name):
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"""
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Replaces whitespace and '-' characters in `category_name`
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to allow category_name to be made into a valid Python
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identifier.
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Doesn't check all possible ways a string might be invalid;
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the user of the collate_content module is advised to use
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categories with Python-friendly names.
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"""
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return re.sub(r'\s', '_', category_name).replace('-', '_').lower()
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ARTICLE_GROUPER = functools.partial(group_content, content_type='articles')
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PAGE_GROUPER = functools.partial(group_content, content_type='pages')
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def register():
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"""Register the new plugin"""
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signals.article_generator_finalized.connect(ARTICLE_GROUPER)
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signals.page_generator_finalized.connect(PAGE_GROUPER)
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