def fulfill_link(self, data_source_name, identifier_identifier,
license_pool, active_loan, delivery_mechanism):
"""Create a new fulfillment link."""
if isinstance(delivery_mechanism, LicensePoolDeliveryMechanism):
logging.warn("LicensePoolDeliveryMechanism passed into fulfill_link instead of DeliveryMechanism!")
delivery_mechanism = delivery_mechanism.delivery_mechanism
format_types = AcquisitionFeed.format_types(delivery_mechanism)
if not format_types:
return None
fulfill_url = self.url_for(
"fulfill", data_source=data_source_name,
identifier=identifier_identifier,
mechanism_id=delivery_mechanism.id,
_external=True
)
rel=OPDSFeed.ACQUISITION_REL
link_tag = AcquisitionFeed.acquisition_link(
rel=rel, href=fulfill_url,
types=format_types
)
children = AcquisitionFeed.license_tags(license_pool, active_loan, None)
link_tag.extend(children)
return link_tag
def fulfill_link(self, license_pool, active_loan, delivery_mechanism):
"""Create a new fulfillment link.
This link may include tags from the OPDS Extensions for DRM.
"""
if isinstance(delivery_mechanism, LicensePoolDeliveryMechanism):
logging.warn("LicensePoolDeliveryMechanism passed into fulfill_link instead of DeliveryMechanism!")
delivery_mechanism = delivery_mechanism.delivery_mechanism
format_types = AcquisitionFeed.format_types(delivery_mechanism)
if not format_types:
return None
fulfill_url = self.url_for(
"fulfill",
license_pool_id=license_pool.id,
mechanism_id=delivery_mechanism.id,
library_short_name=self.library.short_name,
_external=True
)
rel=OPDSFeed.ACQUISITION_REL
link_tag = AcquisitionFeed.acquisition_link(
rel=rel, href=fulfill_url,
types=format_types
)
children = AcquisitionFeed.license_tags(license_pool, active_loan, None)
link_tag.extend(children)
children = self.drm_device_registration_tags(
license_pool, active_loan, delivery_mechanism
)
link_tag.extend(children)
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