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# Copyright (C) 2010 Google Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from google.appengine.ext import db
from model.queuepropertymixin import QueuePropertyMixin
class WorkItems(db.Model, QueuePropertyMixin):
queue_name = db.StringProperty()
item_ids = db.ListProperty(int)
date = db.DateTimeProperty(auto_now_add=True)
def display_position_for_attachment(self, attachment_id):
"""Returns a 1-based index corresponding to the position
of the attachment_id in the queue. If the attachment is
not in this queue, this returns None"""
if attachment_id in self.item_ids:
return self.item_ids.index(attachment_id) + 1
return None
@staticmethod
def _unguarded_add(key, attachment_id):
work_items = db.get(key)
if attachment_id in work_items.item_ids:
return
work_items.item_ids.append(attachment_id)
work_items.put()
# Because this uses .key() self.is_saved() must be True or this will throw NotSavedError.
def add_work_item(self, attachment_id):
db.run_in_transaction(self._unguarded_add, self.key(), attachment_id)
@staticmethod
def _unguarded_remove(key, attachment_id):
work_items = db.get(key)
if attachment_id in work_items.item_ids:
# We should never have more than one entry for a work item, so we only need remove the first.
work_items.item_ids.remove(attachment_id)
work_items.put()
# Because this uses .key() self.is_saved() must be True or this will throw NotSavedError.
def remove_work_item(self, attachment_id):
db.run_in_transaction(self._unguarded_remove, self.key(), attachment_id)
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