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# -*- coding: utf8 -*- |
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''' |
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This module contains a few utility functions. |
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''' |
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import re |
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import logging |
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log = logging.getLogger(__name__) |
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from pyramid.renderers import JSON |
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from skosprovider.skos import ( |
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Concept, |
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Collection, |
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Label, |
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Note, |
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Source |
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) |
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def parse_range_header(range): |
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''' |
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Parse a range header as used by the dojo Json Rest store. |
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:param str range: The content of the range header to be parsed. |
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eg. `items=0-9` |
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:returns: A dict with keys start, finish and number or `False` if the |
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range is invalid. |
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''' |
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match = re.match('^items=([0-9]+)-([0-9]+)$', range) |
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if match: |
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start = int(match.group(1)) |
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finish = int(match.group(2)) |
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if finish < start: |
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finish = start |
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return { |
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'start': start, |
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'finish': finish, |
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'number': finish - start + 1 |
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} |
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else: |
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return False |
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json_renderer = JSON() |
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def concept_adapter(obj, request): |
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''' |
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Adapter for rendering a :class:`skosprovider.skos.Concept` to json. |
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:param skosprovider.skos.Concept obj: The concept to be rendered. |
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:rtype: :class:`dict` |
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''' |
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p = request.skos_registry.get_provider(obj.concept_scheme.uri) |
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return { |
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'id': obj.id, |
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'type': 'concept', |
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'uri': obj.uri, |
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'label': obj.label().label if obj.label() else None, |
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'concept_scheme': { |
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'uri': obj.concept_scheme.uri, |
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'labels': obj.concept_scheme.labels |
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}, |
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'labels': obj.labels, |
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'notes': obj.notes, |
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'sources': obj.sources, |
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'narrower': _map_relations(obj.narrower, p), |
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'broader': _map_relations(obj.broader, p), |
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'related': _map_relations(obj.related, p), |
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'member_of': _map_relations(obj.member_of, p), |
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'subordinate_arrays': _map_relations(obj.subordinate_arrays, p), |
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'matches': obj.matches |
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} |
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def collection_adapter(obj, request): |
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''' |
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Adapter for rendering a :class:`skosprovider.skos.Collection` to json. |
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:param skosprovider.skos.Collection obj: The collection to be rendered. |
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:rtype: :class:`dict` |
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''' |
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p = request.skos_registry.get_provider(obj.concept_scheme.uri) |
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return { |
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'id': obj.id, |
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'type': 'collection', |
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'uri': obj.uri, |
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'label': obj.label().label if obj.label() else None, |
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'concept_scheme': { |
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'uri': obj.concept_scheme.uri, |
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'labels': obj.concept_scheme.labels |
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}, |
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'labels': obj.labels, |
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'notes': obj.notes, |
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'sources': obj.sources, |
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'members': _map_relations(obj.members, p), |
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'member_of': _map_relations(obj.member_of, p), |
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'superordinates': _map_relations(obj.superordinates, p), |
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} |
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def _map_relations(relations, p): |
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''' |
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:param: :class:`list` relations: Relations to be mapped. These are concept or collection id's. |
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:param: :class:`skosprovider.providers.VocabularyProvider` p: Provider to look up id's. |
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:rtype: :class:`list` |
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''' |
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ret = [] |
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for r in relations: |
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c = p.get_by_id(r) |
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if c: |
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ret.append(_map_relation(c)) |
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else: |
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log.warning( |
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'A relation references a concept or collection %d in provider %s that can not be found. Please check the integrity of your data.' % |
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(r, p.get_vocabulary_id()) |
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) |
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return ret |
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def _map_relation(c): |
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""" |
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Map related concept or collection, leaving out the relations (to avoid circular dependencies) |
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:param c: the concept or collection to map |
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:rtype: :class:`dict` |
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""" |
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return { |
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'id': c.id, |
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'type': c.type, |
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'uri': c.uri, |
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'label': c.label().label if c.label() else None |
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} |
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def label_adapter(obj, request): |
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''' |
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Adapter for rendering a :class:`skosprovider.skos.Label` to json. |
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:param skosprovider.skos.Label obj: The label to be rendered. |
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:rtype: :class:`dict` |
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''' |
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return { |
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'label': obj.label, |
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'type': obj.type, |
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'language': obj.language |
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} |
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def note_adapter(obj, request): |
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''' |
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Adapter for rendering a :class:`skosprovider.skos.Note` to json. |
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:param skosprovider.skos.Note obj: The note to be rendered. |
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:rtype: :class:`dict` |
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''' |
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return { |
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'note': obj.note, |
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'type': obj.type, |
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'language': obj.language, |
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'markup': obj.markup |
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} |
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def source_adapter(obj, request): |
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''' |
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Adapter for rendering a :class:`skosprovider.skos.Source` to json. |
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:param skosprovider.skos.Source obj: The source to be rendered. |
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:rtype: :class:`dict` |
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''' |
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return { |
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'citation': obj.citation |
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} |
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json_renderer.add_adapter(Concept, concept_adapter) |
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json_renderer.add_adapter(Collection, collection_adapter) |
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json_renderer.add_adapter(Label, label_adapter) |
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json_renderer.add_adapter(Note, note_adapter) |
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json_renderer.add_adapter(Source, source_adapter) |
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OnroerendErfgoed /
pyramid_skosprovider
