Class: MagLove::Middleware::LiveReload

Inherits:
Object
  • Object
show all
Includes:
Workspace
Defined in:
lib/maglove/middleware/live_reload.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Workspace

#gem_dir, #theme_base_dir, #theme_base_file, #theme_config, #theme_dir, #theme_file, #workspace_dir, #workspace_file

Constructor Details

#initialize(app, options = {}) ⇒ LiveReload

Returns a new instance of LiveReload.



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# File 'lib/maglove/middleware/live_reload.rb', line 9

def initialize(app, options = {})
  @app = app
  @options = options
  @theme = options[:theme]
  @templates = options[:templates]
end

Instance Attribute Details

#app ⇒ Object (readonly)

Returns the value of attribute app.



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# File 'lib/maglove/middleware/live_reload.rb', line 7

def app
  @app
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/maglove/middleware/live_reload.rb', line 7

def options
  @options
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/maglove/middleware/live_reload.rb', line 16

def call(env)
  if env["PATH_INFO"] == @options[:mount]
    request = Rack::Request.new(env)
    @ws = Faye::WebSocket.new(request.env, [], {})
    @ws.onmessage = lambda do |event|
      message = JSON.parse(event.data)
      command = message["command"]
      handle_command(command, message)
    end
    @ws.onclose = ->(event) { clear_watcher! if @watcher }
    @ws.rack_response
  else
    @app.call(env)
  end
end

#clear_watcher! ⇒ Object 



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# File 'lib/maglove/middleware/live_reload.rb', line 32

def clear_watcher!
  @ws = nil
  @watcher.stop
  @thread.join
  @watcher = nil
  @thread = nil
end

#handle_command(command, data = {}) ⇒ Object 



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# File 'lib/maglove/middleware/live_reload.rb', line 45

def handle_command(command, data = {})
  if command == "init"
    send_command("init", { templates: @templates })
  elsif command == "watch"
    watch
  end
end

#send_command(command, data = {}) ⇒ Object 



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# File 'lib/maglove/middleware/live_reload.rb', line 40

def send_command(command, data = {})
  data[:command] = command
  @ws.send(JSON.dump(data)) if @ws
end

#watch ⇒ Object 



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# File 'lib/maglove/middleware/live_reload.rb', line 53

def watch
  patterns = [
    theme_file("**/*.{haml,html,coffee,js,less,scss,css,yml}"),
    theme_file("images/**/*.{jpg,jpeg,gif,png,svg}"),
    theme_base_file("**/*.{coffee,js,less,scss,css}"),
    theme_base_file("images/**/*.{jpg,jpeg,gif,png,svg}")
  ]
  @watcher = FileWatcher.new(patterns.map(&:to_s))
  @thread = Thread.new(@watcher) do |fw|
    fw.watch do |filename, event|
      if workspace_file(".", filename).exists? and event != :delete
        if filename =~ %r{^src/base/#{theme_config(:base_version)}/.*\.coffee}
          path = "theme.coffee"
        elsif filename =~ %r{^src/base/#{theme_config(:base_version)}/.*\.less}
          path = "theme.less"
        elsif filename =~ %r{^src/base/#{theme_config(:base_version)}/.*\.scss}
          path = "theme.scss"
        elsif filename =~ %r{^src/themes/#{@theme}/.*\.less}
          path = "theme.less"
        elsif filename =~ %r{^src/themes/#{@theme}/.*\.scss}
          path = "theme.scss"
        elsif filename =~ %r{^src/themes/#{@theme}/.*\.coffee}
          path = "theme.coffee"
        else
          path = filename.gsub("src/themes/#{@theme}/", '')
        end
        asset = theme_file(path).asset
        if asset.write!
          case asset.output_type
          when "html"
            template = path.match(%r{templates/(.*)\.haml})[1]
            send_command("html", { template: template, contents: asset.contents })
          when "css"
            send_command("css", { contents: asset.contents })
          when "js"
            send_command("js", { contents: asset.contents })
          end
        end
      end
    end
  end
end