def __init__(self, engine, name, match, group_by, order='slug'):
self.engine = engine
self.name = name
self.match = match
self.group_by = group_by
self.order = order
self.collections = {}
# Load shared config for collections
collection_meta = engine.config['collections'][name].get('meta', {})
self.meta = jules._BundleMeta(engine.config.get('bundle_defaults', {}), collection_meta)
def collect(self, rule, group_by_property, bundle):
"""Collect the bungle if it is a proper candidate for the collection.
rule: The rule to match the bundle by.
is - match if the grouper property is equal to the group value
in - match if the grouper property contains the group value
group_by_property: The meta property on which to group bundles by
bundle: The bundle to collect, if it matches the rules, into one
of the collections being kept by theis collector.
"""
try:
value = bundle.meta[group_by_property]
except KeyError:
pass
else:
if rule == 'is':
values = [value]
elif rule == 'in':
values = value
key_pattern = self.engine.config['collections'][self.name].get('key_pattern', '{value}')
for value in values:
key = key_pattern.format(property=group_by_property, value=value)
if not value in self.collections:
# Add if new, merge with a YAML file, but stop if we'd overwrite a bundle
replace = False
meta = self.meta
try:
existing = self.engine.get_bundle(key=key)
except ValueError:
pass
else:
if ['yaml'] == list(existing.parts):
meta = jules._BundleMeta(meta, existing.meta)
replace = True
collection = Collection(key, rule, group_by_property, value, meta)
self.engine.add_bundles({
key: collection,
}, replace=replace)
self.collections[value] = collection
else:
collection = self.collections[value]
collection[bundle.key] = bundle
# All bundles need a copy of this collection
for colkey, collection in self.collections.items():
for value in values:
self.engine.context['collections'].setdefault(group_by_property, set()).add(collection)
if value == collection.value:
bundle.meta['collections'].setdefault(group_by_property, set()).add(collection)
collection.add_bundle(bundle)