86 lines
2.3 KiB
Ruby
86 lines
2.3 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class AwarenessChannel < ApplicationCable::Channel # rubocop:disable Gitlab/NamespacedClass
|
|
REFRESH_INTERVAL = ENV.fetch("GITLAB_AWARENESS_REFRESH_INTERVAL_SEC", 60)
|
|
private_constant :REFRESH_INTERVAL
|
|
|
|
# Produces a refresh interval value, based of the
|
|
# GITLAB_AWARENESS_REFRESH_INTERVAL_SEC environment variable or the given
|
|
# default. Makes sure, that the interval after a jitter is applied, is never
|
|
# less than half the predefined interval.
|
|
def self.refresh_interval(range: -10..10)
|
|
min = REFRESH_INTERVAL / 2.to_f
|
|
[min.to_i, REFRESH_INTERVAL.to_i + rand(range)].max.seconds
|
|
end
|
|
private_class_method :refresh_interval
|
|
|
|
# keep clients updated about session membership
|
|
periodically every: self.refresh_interval do
|
|
transmit payload
|
|
end
|
|
|
|
def subscribed
|
|
reject unless valid_subscription?
|
|
return if subscription_rejected?
|
|
|
|
stream_for session, coder: ActiveSupport::JSON
|
|
|
|
session.join(current_user)
|
|
AwarenessChannel.broadcast_to(session, payload)
|
|
end
|
|
|
|
def unsubscribed
|
|
return if subscription_rejected?
|
|
|
|
session.leave(current_user)
|
|
AwarenessChannel.broadcast_to(session, payload)
|
|
end
|
|
|
|
# Allows a client to let the server know they are still around. This is not
|
|
# like a heartbeat mechanism. This can be triggered by any action that results
|
|
# in a meaningful "presence" update. Like scrolling the screen (debounce),
|
|
# window becoming active, user starting to type in a text field, etc.
|
|
def touch
|
|
session.touch!(current_user)
|
|
|
|
transmit payload
|
|
end
|
|
|
|
private
|
|
|
|
def valid_subscription?
|
|
current_user.present? && path.present?
|
|
end
|
|
|
|
def payload
|
|
{ collaborators: collaborators }
|
|
end
|
|
|
|
def collaborators
|
|
session.online_users_with_last_activity.map do |user, last_activity|
|
|
collaborator(user, last_activity)
|
|
end
|
|
end
|
|
|
|
def collaborator(user, last_activity)
|
|
{
|
|
id: user.id,
|
|
name: user.name,
|
|
username: user.username,
|
|
avatar_url: user.avatar_url(size: 36),
|
|
last_activity: last_activity,
|
|
last_activity_humanized: ActionController::Base.helpers.distance_of_time_in_words(
|
|
Time.zone.now, last_activity
|
|
)
|
|
}
|
|
end
|
|
|
|
def session
|
|
@session ||= AwarenessSession.for(path)
|
|
end
|
|
|
|
def path
|
|
params[:path]
|
|
end
|
|
end
|