def test_all_resource_fields(self):
license = LicenseFactory()
resource = ResourceFactory(format='csv')
dataset = DatasetFactory(resources=[resource], license=license)
permalink = url_for('datasets.resource',
id=resource.id,
_external=True)
r = resource_to_rdf(resource, dataset)
assert r.value(DCT.title) == Literal(resource.title)
assert r.value(DCT.description) == Literal(resource.description)
assert r.value(DCT.issued) == Literal(resource.published)
assert r.value(DCT.modified) == Literal(resource.modified)
assert r.value(DCT.license).identifier == URIRef(license.url)
assert r.value(DCT.rights) == Literal(license.title)
assert r.value(DCAT.downloadURL).identifier == URIRef(resource.url)
assert r.value(DCAT.accessURL).identifier == URIRef(permalink)
assert r.value(DCAT.bytesSize) == Literal(resource.filesize)
assert r.value(DCAT.mediaType) == Literal(resource.mime)
assert r.value(DCT.term('format')) == Literal(resource.format)
checksum = r.value(SPDX.checksum)
assert r.graph.value(checksum.identifier, RDF.type) == SPDX.Checksum
assert (r.graph.value(checksum.identifier, SPDX.algorithm)
== SPDX.checksumAlgorithm_sha1)
assert (checksum.value(SPDX.checksumValue)
== Literal(resource.checksum.value))
def test_resource_title_from_format(self):
node = BNode()
g = Graph()
url = 'https://www.somewhere.com/no-extension/'
g.set((node, RDF.type, DCAT.Distribution))
g.set((node, DCAT.downloadURL, URIRef(url)))
g.set((node, DCT.term('format'), Literal('CSV')))
resource = resource_from_rdf(g)
resource.validate()
assert resource.title == 'csv resource'
def resource_from_rdf(graph_or_distrib, dataset=None):
'''
Map a Resource domain model to a DCAT/RDF graph
'''
if isinstance(graph_or_distrib, RdfResource):
distrib = graph_or_distrib
else:
node = graph_or_distrib.value(predicate=RDF.type,
object=DCAT.Distribution)
distrib = graph_or_distrib.resource(node)
download_url = url_from_rdf(distrib, DCAT.downloadURL)
access_url = url_from_rdf(distrib, DCAT.accessURL)
url = safe_unicode(download_url or access_url)
if dataset:
resource = get_by(dataset.resources, 'url', url)
if not dataset or not resource:
resource = Resource()
if dataset:
dataset.resources.append(resource)
resource.title = title_from_rdf(distrib, url)
resource.url = url
resource.description = sanitize_html(distrib.value(DCT.description))
resource.filesize = rdf_value(distrib, DCAT.bytesSize)
resource.mime = rdf_value(distrib, DCAT.mediaType)
fmt = rdf_value(distrib, DCT.term('format'))
if fmt:
resource.format = fmt.lower()
checksum = distrib.value(SPDX.checksum)
if checksum:
algorithm = checksum.value(SPDX.algorithm).identifier
algorithm = CHECKSUM_ALGORITHMS.get(algorithm)
if algorithm:
resource.checksum = Checksum()
resource.checksum.value = rdf_value(checksum, SPDX.checksumValue)
resource.checksum.type = algorithm
resource.published = rdf_value(distrib, DCT.issued, resource.published)
resource.modified = rdf_value(distrib, DCT.modified, resource.modified)
identifier = rdf_value(distrib, DCT.identifier)
if identifier:
resource.extras['dct:identifier'] = identifier
if isinstance(distrib.identifier, URIRef):
resource.extras['uri'] = distrib.identifier.toPython()
return resource
def resource_from_rdf(graph_or_distrib, dataset=None):
'''
Map a Resource domain model to a DCAT/RDF graph
'''
if isinstance(graph_or_distrib, RdfResource):
distrib = graph_or_distrib
else:
node = graph_or_distrib.value(predicate=RDF.type,
object=DCAT.Distribution)
distrib = graph_or_distrib.resource(node)
download_url = url_from_rdf(distrib, DCAT.downloadURL)
access_url = url_from_rdf(distrib, DCAT.accessURL)
url = safe_unicode(download_url or access_url)
if dataset:
resource = get_by(dataset.resources, 'url', url)
if not dataset or not resource:
resource = Resource()
if dataset:
dataset.resources.append(resource)
resource.title = title_from_rdf(distrib, url)
resource.url = url
resource.description = sanitize_html(distrib.value(DCT.description))
resource.filesize = rdf_value(distrib, DCAT.bytesSize)
resource.mime = rdf_value(distrib, DCAT.mediaType)
fmt = rdf_value(distrib, DCT.term('format'))
if fmt:
resource.format = fmt.lower()
checksum = distrib.value(SPDX.checksum)
if checksum:
algorithm = checksum.value(SPDX.algorithm).identifier
algorithm = CHECKSUM_ALGORITHMS.get(algorithm)
if algorithm:
resource.checksum = Checksum()
resource.checksum.value = rdf_value(checksum, SPDX.checksumValue)
resource.checksum.type = algorithm
resource.published = rdf_value(distrib, DCT.issued, resource.published)
resource.modified = rdf_value(distrib, DCT.modified, resource.modified)
identifier = rdf_value(distrib, DCT.identifier)
if identifier:
resource.extras['dct:identifier'] = identifier
if isinstance(distrib.identifier, URIRef):
resource.extras['uri'] = distrib.identifier.toPython()
return resource
def test_all_resource_fields(self):
node = BNode()
g = Graph()
title = faker.sentence()
url = faker.uri()
description = faker.paragraph()
filesize = faker.pyint()
issued = faker.date_time_between(start_date='-60d', end_date='-30d')
modified = faker.past_datetime(start_date='-30d')
mime = faker.mime_type()
sha1 = faker.sha1()
g.add((node, RDF.type, DCAT.Distribution))
g.add((node, DCT.title, Literal(title)))
g.add((node, DCT.description, Literal(description)))
g.add((node, DCAT.downloadURL, Literal(url)))
g.add((node, DCT.issued, Literal(issued)))
g.add((node, DCT.modified, Literal(modified)))
g.add((node, DCAT.bytesSize, Literal(filesize)))
g.add((node, DCAT.mediaType, Literal(mime)))
g.add((node, DCT.term('format'), Literal('CSV')))
checksum = BNode()
g.add((node, SPDX.checksum, checksum))
g.add((checksum, RDF.type, SPDX.Checksum))
g.add((checksum, SPDX.algorithm, SPDX.checksumAlgorithm_sha1))
g.add((checksum, SPDX.checksumValue, Literal(sha1)))
resource = resource_from_rdf(g)
resource.validate()
assert isinstance(resource, Resource)
assert resource.title == title
assert resource.url == url
assert resource.description == description
assert resource.filesize == filesize
assert resource.mime == mime
assert isinstance(resource.checksum, Checksum)
assert resource.checksum.type == 'sha1'
assert resource.checksum.value == sha1
assert resource.published == issued
assert resource.modified == modified
assert resource.format == 'csv'
def resource_to_rdf(resource, dataset=None, graph=None):
'''
Map a Resource domain model to a DCAT/RDF graph
'''
graph = graph or Graph(namespace_manager=namespace_manager)
if dataset and dataset.id:
id = URIRef(
url_for('datasets.show_redirect',
dataset=dataset.id,
_external=True,
_anchor='resource-{0}'.format(resource.id)))
else:
id = BNode(resource.id)
permalink = url_for('datasets.resource', id=resource.id, _external=True)
r = graph.resource(id)
r.set(RDF.type, DCAT.Distribution)
r.set(DCT.identifier, Literal(resource.id))
r.add(DCT.title, Literal(resource.title))
r.add(DCT.description, Literal(resource.description))
r.add(DCAT.downloadURL, URIRef(resource.url))
r.add(DCAT.accessURL, URIRef(permalink))
r.add(DCT.issued, Literal(resource.published))
r.add(DCT.modified, Literal(resource.modified))
if dataset and dataset.license:
r.add(DCT.rights, Literal(dataset.license.title))
if dataset.license.url:
r.add(DCT.license, URIRef(dataset.license.url))
if resource.filesize is not None:
r.add(DCAT.bytesSize, Literal(resource.filesize))
if resource.mime:
r.add(DCAT.mediaType, Literal(resource.mime))
if resource.format:
r.add(DCT.term('format'), Literal(resource.format))
if resource.checksum:
checksum = graph.resource(BNode())
checksum.set(RDF.type, SPDX.Checksum)
algorithm = 'checksumAlgorithm_{0}'.format(resource.checksum.type)
checksum.add(SPDX.algorithm, getattr(SPDX, algorithm))
checksum.add(SPDX.checksumValue, Literal(resource.checksum.value))
r.add(SPDX.checksum, checksum)
return r
def title_from_rdf(rdf, url):
'''
Try to extract a distribution title from a property.
As it's not a mandatory property,
it fallback on building a title from the URL
then the format and in last ressort a generic resource name.
'''
title = rdf_value(rdf, DCT.title)
if title:
return title
if url:
last_part = url.split('/')[-1]
if '.' in last_part and '?' not in last_part:
return last_part
fmt = rdf_value(rdf, DCT.term('format'))
lang = current_app.config['DEFAULT_LANGUAGE']
with i18n.language(lang):
if fmt:
return i18n._('{format} resource').format(format=fmt.lower())
else:
return i18n._('Nameless resource')
def title_from_rdf(rdf, url):
'''
Try to extract a distribution title from a property.
As it's not a mandatory property,
it fallback on building a title from the URL
then the format and in last ressort a generic resource name.
'''
title = rdf_value(rdf, DCT.title)
if title:
return title
if url:
last_part = url.split('/')[-1]
if '.' in last_part and '?' not in last_part:
return last_part
fmt = rdf_value(rdf, DCT.term('format'))
lang = current_app.config['DEFAULT_LANGUAGE']
with i18n.language(lang):
if fmt:
return i18n._('{format} resource').format(format=fmt.lower())
else:
return i18n._('Nameless resource')
def resource_to_rdf(resource, dataset=None, graph=None):
'''
Map a Resource domain model to a DCAT/RDF graph
'''
graph = graph or Graph(namespace_manager=namespace_manager)
if dataset and dataset.id:
id = URIRef(url_for('datasets.show_redirect', dataset=dataset.id,
_external=True,
_anchor='resource-{0}'.format(resource.id)))
else:
id = BNode(resource.id)
permalink = url_for('datasets.resource', id=resource.id, _external=True)
r = graph.resource(id)
r.set(RDF.type, DCAT.Distribution)
r.set(DCT.identifier, Literal(resource.id))
r.add(DCT.title, Literal(resource.title))
r.add(DCT.description, Literal(resource.description))
r.add(DCAT.downloadURL, URIRef(resource.url))
r.add(DCAT.accessURL, URIRef(permalink))
r.add(DCT.issued, Literal(resource.published))
r.add(DCT.modified, Literal(resource.modified))
if dataset and dataset.license:
r.add(DCT.rights, Literal(dataset.license.title))
if dataset.license.url:
r.add(DCT.license, URIRef(dataset.license.url))
if resource.filesize is not None:
r.add(DCAT.bytesSize, Literal(resource.filesize))
if resource.mime:
r.add(DCAT.mediaType, Literal(resource.mime))
if resource.format:
r.add(DCT.term('format'), Literal(resource.format))
if resource.checksum:
checksum = graph.resource(BNode())
checksum.set(RDF.type, SPDX.Checksum)
algorithm = 'checksumAlgorithm_{0}'.format(resource.checksum.type)
checksum.add(SPDX.algorithm, getattr(SPDX, algorithm))
checksum.add(SPDX.checksumValue, Literal(resource.checksum.value))
r.add(SPDX.checksum, checksum)
return r
