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# == Subscribable concern
#
# Users can subscribe to these models.
#
# Used by Issue, MergeRequest, Label
#
module Subscribable
extend ActiveSupport::Concern
included do
has_many :subscriptions, dependent: :destroy, as: :subscribable
end
def subscribed?(user, project = nil)
if subscription = subscriptions.find_by(user: user, project: project)
subscription.subscribed
else
subscribed_without_subscriptions?(user, project)
end
end
# Override this method to define custom logic to consider a subscribable as
# subscribed without an explicit subscription record.
def subscribed_without_subscriptions?(user, project)
false
end
def subscribers(project)
subscriptions_available(project).
where(subscribed: true).
map(&:user)
end
def toggle_subscription(user, project = nil)
unsubscribe_from_other_levels(user, project)
find_or_initialize_subscription(user, project).
update(subscribed: !subscribed?(user, project))
end
def subscribe(user, project = nil)
unsubscribe_from_other_levels(user, project)
find_or_initialize_subscription(user, project)
.update(subscribed: true)
end
def unsubscribe(user, project = nil)
unsubscribe_from_other_levels(user, project)
find_or_initialize_subscription(user, project)
.update(subscribed: false)
end
private
def unsubscribe_from_other_levels(user, project)
other_subscriptions = subscriptions.where(user: user)
other_subscriptions =
if project.blank?
other_subscriptions.where.not(project: nil)
else
other_subscriptions.where(project: nil)
end
other_subscriptions.update_all(subscribed: false)
end
def find_or_initialize_subscription(user, project)
subscriptions.
find_or_initialize_by(user_id: user.id, project_id: project.try(:id))
end
def subscriptions_available(project)
t = Subscription.arel_table
subscriptions.
where(t[:project_id].eq(nil).or(t[:project_id].eq(project.try(:id))))
end
end
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