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