Consolidated subscription logic, switched to managed session.
This patch takes all the helper methods from subscriptions_handler.py and places them into the actual worker task. Furthermore, the subscription worker now uses a self-managed session. Change-Id: I1a68c92bc68dc0a1f0bf713ee43d0d2a74332c17
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# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import json
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from storyboard.db.api import comments as comments_api
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from storyboard.db.api import stories as story_api
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from storyboard.db.api import subscription_events as sub_events_api
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from storyboard.db.api import subscriptions as subscriptions_api
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from storyboard.db.api import timeline_events as timeline_api
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def handle_timeline_events(event, author_id, subscribers):
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for user_id in subscribers:
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if event.event_type == 'user_comment':
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event_info = resolve_comments(event)
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else:
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event_info = event.event_info
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sub_events_api.subscription_events_create({
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"author_id": author_id,
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"subscriber_id": user_id,
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"event_type": event.event_type,
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"event_info": event_info
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})
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def handle_resources(method, resource_id, sub_resource_id, author_id,
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subscribers):
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if sub_resource_id:
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for user_id in subscribers:
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if method == 'DELETE':
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event_type = 'project removed from project_group'
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event_info = json.dumps({'project_group_id': resource_id,
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'project_id': sub_resource_id})
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else:
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event_type = 'project added to project_group'
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event_info = json.dumps({'project_group_id': resource_id,
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'project_id': sub_resource_id})
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sub_events_api.subscription_events_create({
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"author_id": author_id,
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"subscriber_id": user_id,
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"event_type": event_type,
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"event_info": event_info
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})
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else:
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if method == 'DELETE':
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# Handling project_group targeted.
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for user_id in subscribers:
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sub_events_api.subscription_events_create({
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"author_id": author_id,
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"subscriber_id": user_id,
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"event_type": 'project_group deleted',
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"event_info": json.dumps({'project_group_id': resource_id})
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})
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def handle_deletions(resource_name, resource_id):
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target_subs = []
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sub_ids = set()
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resource_name = resource_name[:-1]
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target_sub = subscriptions_api.subscription_get_all_by_target(
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resource_name, resource_id)
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target_subs.extend(target_sub)
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for sub in target_subs:
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sub_ids.add(sub.id)
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for sub_id in sub_ids:
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subscriptions_api.subscription_delete(sub_id)
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def resolve_comments(event):
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event_info = {
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'comment_id': event.comment_id or None,
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}
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# Retrieve the content of the comment.
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comment = comments_api.comment_get(event.comment_id)
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event_info['comment_content'] = comment.content
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# Retrieve the story ID of the comment.
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timeline_events = timeline_api.events_get_all(comment_id=event.comment_id)
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if timeline_events:
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story = story_api.story_get(timeline_events[0].story_id)
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if story:
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event_info['story_id'] = story.id
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event_info['story_title'] = story.title
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return json.dumps(event_info)
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@ -12,16 +12,22 @@
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# implied. See the License for the specific language governing permissions and
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# limitations under the License.
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from storyboard.db.api import subscriptions
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from storyboard.db.api import timeline_events
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from storyboard.notifications.subscriptions_handler import handle_deletions
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from storyboard.notifications.subscriptions_handler import handle_resources
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from storyboard.notifications.subscriptions_handler import \
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handle_timeline_events
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import json
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import storyboard.db.api.base as db_api
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from storyboard.db.api import subscriptions as sub_api
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import storyboard.db.models as models
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from storyboard.worker.task.base import WorkerTaskBase
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class Subscription(WorkerTaskBase):
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def enabled(self):
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"""This plugin is always enabled.
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:return: True
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"""
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return True
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def handle(self, author_id, method, path, status, resource, resource_id,
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sub_resource=None, sub_resource_id=None,
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resource_before=None, resource_after=None):
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@ -39,26 +45,139 @@ class Subscription(WorkerTaskBase):
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:param resource_before: The resource state before this event occurred.
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:param resource_after: The resource state after this event occurred.
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"""
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session = db_api.get_session(in_request=False, autocommit=False)
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try:
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if resource == 'timeline_event':
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event = timeline_events.event_get(resource_id)
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subscribers = subscriptions.subscription_get_all_subscriber_ids(
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'story', event.story_id
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)
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handle_timeline_events(event, author_id, subscribers)
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event = db_api.entity_get(models.TimeLineEvent, resource_id,
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session=session)
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subscribers = sub_api.subscription_get_all_subscriber_ids(
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'story', event.story_id, session=session)
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self.handle_timeline_events(session, event, author_id,
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subscribers)
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elif resource == 'project_group':
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subscribers = subscriptions.subscription_get_all_subscriber_ids(
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resource, resource_id
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)
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handle_resources(method=method,
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subscribers = sub_api.subscription_get_all_subscriber_ids(
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resource, resource_id, session=session)
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self.handle_resources(session=session,
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method=method,
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resource_id=resource_id,
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sub_resource_id=sub_resource_id,
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author_id=author_id,
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subscribers=subscribers)
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if method == 'DELETE' and not sub_resource_id:
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handle_deletions(resource, resource_id)
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self.handle_deletions(session, resource, resource_id)
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def enabled(self):
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return True
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session.commit()
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session.flush()
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except Exception:
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session.rollback()
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def handle_deletions(self, session, resource_name, resource_id):
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target_subs = []
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sub_ids = set()
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resource_name = resource_name[:-1]
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target_sub = db_api.entity_get_all(models.Subscription,
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target_type=resource_name,
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target_id=resource_id,
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session=session)
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target_subs.extend(target_sub)
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for sub in target_subs:
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sub_ids.add(sub.id)
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for sub_id in sub_ids:
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db_api.entity_hard_delete(models.Subscription,
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sub_id,
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session=session)
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def handle_timeline_events(self, session, event, author_id, subscribers):
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for user_id in subscribers:
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if event.event_type == 'user_comment':
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event_info = json.dumps(
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self.resolve_comments(session=session, event=event)
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)
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else:
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event_info = event.event_info
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db_api.entity_create(models.SubscriptionEvents, {
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"author_id": author_id,
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"subscriber_id": user_id,
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"event_type": event.event_type,
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"event_info": event_info
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}, session=session)
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def handle_resources(self, session, method, resource_id, sub_resource_id,
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author_id, subscribers):
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if sub_resource_id:
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for user_id in subscribers:
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if method == 'DELETE':
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event_type = 'project removed from project_group'
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event_info = json.dumps({'project_group_id': resource_id,
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'project_id': sub_resource_id})
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else:
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event_type = 'project added to project_group'
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event_info = json.dumps({'project_group_id': resource_id,
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'project_id': sub_resource_id})
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db_api.entity_create(models.SubscriptionEvents, {
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"author_id": author_id,
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"subscriber_id": user_id,
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"event_type": event_type,
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"event_info": event_info
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}, session=session)
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else:
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if method == 'DELETE':
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# Handling project_group targeted.
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for user_id in subscribers:
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db_api.entity_create(models.SubscriptionEvents, {
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"author_id": author_id,
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"subscriber_id": user_id,
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"event_type": 'project_group deleted',
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"event_info": json.dumps(
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{'project_group_id': resource_id})
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}, session=session)
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def resolve_comments(self, session, event):
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# Sanity check. If there's no comment_id, exit.
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if 'comment_id' not in event:
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return None
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# Retrieve the content of the comment.
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comment = db_api.entity_get(models.Comment,
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event.comment_id,
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session=session)
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if not comment:
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return None
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# Retrieve the timeline events.
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timeline_event = session.query(models.TimeLineEvent) \
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.filter(models.TimeLineEvent.comment_id == event.comment_id) \
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.first()
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if not timeline_event:
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return None
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# Retrieve the story from the timeline event.
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story = db_api.entity_get(models.Story,
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timeline_event.story_id,
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session=session)
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if not story:
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return None
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# Construct and return the comment's event_info object.
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return {
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'comment_id': comment.id,
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'comment_content': comment.content,
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'story_id': story.id,
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'story_title': story.title
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}
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