def open_access_link(self, lpdm):
url = cdnify(lpdm.resource.url, Configuration.cdns())
kw = dict(rel=OPDSFeed.OPEN_ACCESS_REL, href=url)
rep = lpdm.resource.representation
if rep and rep.media_type:
kw['type'] = rep.media_type
link_tag = AcquisitionFeed.link(**kw)
always_available = OPDSFeed.makeelement("{%s}availability" %
OPDSFeed.OPDS_NS,
status="available")
link_tag.append(always_available)
return link_tag
def open_access_link(self, lpdm):
cdn_host = Configuration.cdn_host(Configuration.CDN_OPEN_ACCESS_CONTENT)
url = cdnify(lpdm.resource.url, cdn_host)
kw = dict(rel=OPDSFeed.OPEN_ACCESS_REL, href=url)
rep = lpdm.resource.representation
if rep and rep.media_type:
kw['type'] = rep.media_type
link_tag = AcquisitionFeed.link(**kw)
always_available = E._makeelement(
"{%s}availability" % opds_ns, status="available"
)
link_tag.append(always_available)
return link_tag
def borrow_link(self, identifier,
borrow_mechanism, fulfillment_mechanisms):
if borrow_mechanism:
# Following this link will both borrow the book and set
# its delivery mechanism.
mechanism_id = borrow_mechanism.delivery_mechanism.id
else:
# Following this link will borrow the book but not set
# its delivery mechanism.
mechanism_id = None
borrow_url = self.url_for(
"borrow",
identifier_type=identifier.type,
identifier=identifier.identifier,
mechanism_id=mechanism_id,
library_short_name=self.library.short_name,
_external=True)
rel = OPDSFeed.BORROW_REL
borrow_link = AcquisitionFeed.link(
rel=rel, href=borrow_url, type=OPDSFeed.ENTRY_TYPE
)
indirect_acquisitions = []
for lpdm in fulfillment_mechanisms:
# We have information about one or more delivery
# mechanisms that will be available at the point of
# fulfillment. To the extent possible, put information
# about these mechanisms into the <link> tag as
# <opds:indirectAcquisition> tags.
# These are the formats mentioned in the indirect
# acquisition.
format_types = AcquisitionFeed.format_types(lpdm.delivery_mechanism)
# If we can borrow this book, add this delivery mechanism
# to the borrow link as an <opds:indirectAcquisition>.
if format_types:
indirect_acquisition = AcquisitionFeed.indirect_acquisition(
format_types
)
indirect_acquisitions.append(indirect_acquisition)
if not indirect_acquisitions:
raise UnfulfillableWork()
borrow_link.extend(indirect_acquisitions)
return borrow_link
def borrow_link(self, data_source_name, identifier,
borrow_mechanism, fulfillment_mechanisms):
if borrow_mechanism:
# Following this link will both borrow the book and set
# its delivery mechanism.
mechanism_id = borrow_mechanism.delivery_mechanism.id
else:
# Following this link will borrow the book but not set
# its delivery mechanism.
mechanism_id = None
borrow_url = self.url_for(
"borrow", data_source=data_source_name,
identifier_type=identifier.type,
identifier=identifier.identifier,
mechanism_id=mechanism_id, _external=True)
rel = OPDSFeed.BORROW_REL
borrow_link = AcquisitionFeed.link(
rel=rel, href=borrow_url, type=OPDSFeed.ENTRY_TYPE
)
for lpdm in fulfillment_mechanisms:
# We have information about one or more delivery
# mechanisms that will be available at the point of
# fulfillment. To the extent possible, put information
# about these mechanisms into the <link> tag as
# <opds:indirectAcquisition> tags.
# These are the formats mentioned in the indirect
# acquisition.
format_types = AcquisitionFeed.format_types(lpdm.delivery_mechanism)
# If we can borrow this book, add this delivery mechanism
# to the borrow link as an <opds:indirectAcquisition>.
if format_types:
indirect_acquisition = AcquisitionFeed.indirect_acquisition(
format_types
)
borrow_link.append(indirect_acquisition)
return borrow_link