82 lines
2.6 KiB
Ruby
82 lines
2.6 KiB
Ruby
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require "active_support/core_ext/hash/indifferent_access"
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module ActionCable
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module Connection
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# Collection class for all the channel subscriptions established on a given connection. Responsible for routing incoming commands that arrive on
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# the connection to the proper channel.
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class Subscriptions # :nodoc:
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def initialize(connection)
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@connection = connection
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@subscriptions = {}
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end
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def execute_command(data)
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case data["command"]
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when "subscribe" then add data
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when "unsubscribe" then remove data
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when "message" then perform_action data
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else
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logger.error "Received unrecognized command in #{data.inspect}"
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end
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rescue Exception => e
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logger.error "Could not execute command from (#{data.inspect}) [#{e.class} - #{e.message}]: #{e.backtrace.first(5).join(" | ")}"
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end
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def add(data)
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id_key = data["identifier"]
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id_options = ActiveSupport::JSON.decode(id_key).with_indifferent_access
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return if subscriptions.key?(id_key)
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subscription_klass = id_options[:channel].safe_constantize
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if subscription_klass && ActionCable::Channel::Base >= subscription_klass
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subscription = subscription_klass.new(connection, id_key, id_options)
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subscriptions[id_key] = subscription
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subscription.subscribe_to_channel
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else
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logger.error "Subscription class not found: #{id_options[:channel].inspect}"
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end
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end
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def remove(data)
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logger.info "Unsubscribing from channel: #{data['identifier']}"
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remove_subscription subscriptions[data["identifier"]]
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end
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def remove_subscription(subscription)
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subscription.unsubscribe_from_channel
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subscriptions.delete(subscription.identifier)
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end
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def perform_action(data)
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find(data).perform_action ActiveSupport::JSON.decode(data["data"])
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end
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def identifiers
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subscriptions.keys
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end
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def unsubscribe_from_all
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subscriptions.each { |id, channel| remove_subscription(channel) }
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end
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# TODO Change this to private once we've dropped Ruby 2.2 support.
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# Workaround for Ruby 2.2 "private attribute?" warning.
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protected
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attr_reader :connection, :subscriptions
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private
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delegate :logger, to: :connection
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def find(data)
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if subscription = subscriptions[data["identifier"]]
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subscription
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else
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raise "Unable to find subscription with identifier: #{data['identifier']}"
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end
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end
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end
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end
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end
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