views.py
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	# -- coding: utf-8 --
	##
	## This file is part of Invenio.
	## Copyright (C) 2014 CERN.
	##
	## Invenio is free software; you can redistribute it and/or
	## modify it under the terms of the GNU General Public License as
	## published by the Free Software Foundation; either version 2 of the
	## License, or (at your option) any later version.
	##
	## Invenio is distributed in the hope that it will be useful, but
	## WITHOUT ANY WARRANTY; without even the implied warranty of
	## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	## General Public License for more details.
	##
	## You should have received a copy of the GNU General Public License
	## along with Invenio; if not, write to the Free Software Foundation, Inc.,
	## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

	""" Persistent identifier store views. """

	from __future__ import absolute_import

	from flask import Blueprint

	from .models import PersistentIdentifier


	blueprint = Blueprint(
	'pidstore',
	__name__,
	)


	#
	# Template filters
	#
	@blueprint.app_template_filter('pid_exists')
	def pid_exists(value, pidtype="doi"):
	""" Check if a persistent identifier exists. """
	return PersistentIdentifier.get(pidtype, value) is not None


	@blueprint.app_template_filter('doi_link')
	def doi_link(value):
	""" Convert DOI to a link. """
	return """<a href="http://dx.doi.org/%(doi)s">%(doi)s</a>""" % dict(
	doi=value
	)