Class: Mata::Broadcaster

Inherits:
Object
  • Object
show all
Defined in:
lib/mata/broadcaster.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Broadcaster

Returns a new instance of Broadcaster.



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# File 'lib/mata/broadcaster.rb', line 5

def initialize
  @clients = []
  @clients_mutex = Mutex.new
  @cleanup_thread = cleanup_periodically
end

Instance Method Details

#broadcast_to_all(files) ⇒ Object 



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# File 'lib/mata/broadcaster.rb', line 51

def broadcast_to_all(files)
  clients_copy = @clients_mutex.synchronize { @clients.dup }
  return if clients_copy.empty?

  files.each do |file|
    event_data = {type: "reload"}
    message = "data: #{event_data.to_json}\n\n"

    clients_copy.each do |stream|
      stream << message
    rescue
      @clients_mutex.synchronize { @clients.delete(stream) }
    end
  end
end

#deliver_payload ⇒ Object 



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# File 'lib/mata/broadcaster.rb', line 42

def deliver_payload
  idiomorph_js = File.read(File.join(__dir__, "idiomorph.min.js"))
  client_js = File.read(File.join(__dir__, "client.js"))

  script = "#{idiomorph_js}\n\n#{client_js}"

  [200, {"content-type" => "application/javascript"}, [script]]
end

#establish_contact(env) ⇒ Object 



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# File 'lib/mata/broadcaster.rb', line 11

def establish_contact(env)
  if env["REQUEST_METHOD"] != "GET"
    return [405, {}, []]
  end

  headers = {
    "content-type" => "text/event-stream",
    "cache-control" => "no-cache",
    "connection" => "keep-alive",
    "access-control-allow-origin" => "*"
  }

  [200, headers, proc { |stream|
    @clients_mutex.synchronize do
      @clients << stream
    end

    begin
      stream << "data: {\"type\":\"connected\"}\n\n"

      Thread.new do
        loop { sleep 30 }
      rescue
        @clients_mutex.synchronize { @clients.delete(stream) }
      end
    rescue
      @clients_mutex.synchronize { @clients.delete(stream) }
    end
  }]
end

#stand_down ⇒ Object 



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# File 'lib/mata/broadcaster.rb', line 67

def stand_down
  @cleanup_thread&.kill

  @clients_mutex.synchronize { @clients.clear }
end