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views.py
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Fri, Jul 12, 04:38

views.py
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# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2012, 2013, 2014, 2015 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.
"""Implementation of Blueprint for previewers."""
import itertools
from flask import Blueprint, request, current_app
from flask_breadcrumbs import default_breadcrumb_root
from invenio.base.globals import cfg
from invenio.config import CFG_SITE_RECORD
from invenio.modules.records.views import request_record
from .registry import previewers
from .utils import get_record_documents, get_record_files
blueprint = Blueprint('previewer', __name__, url_prefix="/" + CFG_SITE_RECORD,
static_url_path='/record', template_folder='templates',
static_folder='static')
default_breadcrumb_root(blueprint, '.')
@blueprint.route('/<int:recid>/preview', methods=['GET', 'POST'])
@request_record
def preview(recid):
"""Preview file for given record."""
filename = request.args.get('filename', type=str)
for f in itertools.chain(get_record_documents(recid, filename),
get_record_files(recid, filename)):
if f.name + f.superformat == filename or filename is None:
ordered = previewers.keys()
if "CFG_PREVIEW_PREFERENCE" in cfg and \
f.superformat in cfg["CFG_PREVIEW_PREFERENCE"]:
from collections import OrderedDict
ordered = OrderedDict.fromkeys(
cfg["CFG_PREVIEW_PREFERENCE"][f.superformat] +
ordered).keys()
try:
for plugin_id in ordered:
if previewers[plugin_id]['can_preview'](f):
return previewers[plugin_id]['preview'](f)
except Exception:
current_app.logger.exception(
"Preview plugin {0} failed "
"previewing {1} in record {2}".format(
plugin_id, filename, recid
)
)
return previewers['default']['preview'](None)
@blueprint.route('/<int:recid>/preview/pdfmaxpage', methods=['GET', 'POST'])
@request_record
def get_pdf_maxpage(recid):
"""Get maximal page from pdf."""
from invenio.legacy.bibdocfile.api import BibRecDocs
from .previewerext.pdftk import maxpage
return maxpage(BibRecDocs(recid).list_latest_files(list_hidden=False)[0])

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