137 lines
4.3 KiB
Ruby
137 lines
4.3 KiB
Ruby
#
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# Copyright (C) 2011 - present Instructure, Inc.
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#
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# This file is part of Canvas.
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#
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# Canvas is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Affero General Public License as published by the Free
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# Software Foundation, version 3 of the License.
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#
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# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along
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# with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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class Announcement < DiscussionTopic
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belongs_to :context, polymorphic: [:course, :group]
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has_a_broadcast_policy
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include HasContentTags
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include Plannable
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sanitize_field :message, CanvasSanitize::SANITIZE
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before_save :infer_content
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before_save :respect_context_lock_rules
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validates_presence_of :context_id
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validates_presence_of :context_type
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validates_presence_of :message
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acts_as_list scope: { context: self, type: 'Announcement' }
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def validate_draft_state_change
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old_draft_state, new_draft_state = self.changes['workflow_state']
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self.errors.add :workflow_state, I18n.t('#announcements.error_draft_state', "This topic cannot be set to draft state because it is an announcement.") if new_draft_state == 'unpublished'
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end
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def infer_content
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self.title ||= t(:no_title, "No Title")
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end
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protected :infer_content
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def respect_context_lock_rules
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lock if !locked? &&
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context.is_a?(Course) &&
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context.lock_all_announcements?
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end
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protected :respect_context_lock_rules
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def self.lock_from_course(course)
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Announcement.where(
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:context_type => 'Course',
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:context_id => course,
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:workflow_state => 'active'
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).update_all(:locked => true)
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end
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set_broadcast_policy! do
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dispatch :new_announcement
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to { users_with_permissions(active_participants_include_tas_and_teachers(true) - [user]) }
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whenever { |record|
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record.send_notification_for_context? and
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((record.just_created and !(record.post_delayed? || record.unpublished?)) || record.changed_state(:active, :unpublished) || record.changed_state(:active, :post_delayed))
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}
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dispatch :announcement_created_by_you
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to { user }
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whenever { |record|
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record.send_notification_for_context? and
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((record.just_created and !(record.post_delayed? || record.unpublished?)) || record.changed_state(:active, :unpublished) || record.changed_state(:active, :post_delayed))
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}
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end
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set_policy do
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given { |user| self.user.present? && self.user == user }
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can :update and can :reply and can :read
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given { |user| self.user.present? && self.user == user && self.discussion_entries.active.empty? }
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can :delete
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given do |user|
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self.grants_right?(user, :read) &&
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(self.context.is_a?(Group) ||
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(user &&
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(self.context.grants_right?(user, :read_as_admin) ||
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(self.context.is_a?(Course) &&
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self.context.includes_user?(user)))))
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end
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can :read_replies
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given { |user, session| self.context.grants_right?(user, session, :read_announcements) }
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can :read
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given { |user, session| self.context.grants_right?(user, session, :post_to_forum) && !self.locked?}
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can :reply
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given { |user, session| self.context.is_a?(Group) && self.context.grants_right?(user, session, :post_to_forum) }
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can :create
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given { |user, session| self.context.grants_all_rights?(user, session, :read_announcements, :moderate_forum) } #admins.include?(user) }
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can :update and can :read_as_admin and can :delete and can :reply and can :create and can :read and can :attach
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given do |user, session|
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self.allow_rating && (!self.only_graders_can_rate ||
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self.context.grants_right?(user, session, :manage_grades))
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end
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can :rate
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end
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def is_announcement; true end
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# no one should receive discussion entry notifications for announcements
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def subscribers
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[]
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end
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def subscription_hold(user, context_enrollment, session)
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:topic_is_announcement
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end
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def can_unpublish?(opts=nil)
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false
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end
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def published?
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true
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end
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def assignment
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nil
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end
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end
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