Class: Natour::MapGeoAdmin

Inherits:
Object
  • Object
show all
Defined in:
lib/natour/map_geo_admin.rb

Defined Under Namespace

Classes: MapServlet

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(port: 0) ⇒ MapGeoAdmin

Returns a new instance of MapGeoAdmin.



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# File 'lib/natour/map_geo_admin.rb', line 10

def initialize(port: 0)
  @doc_root = Pathname(Dir.mktmpdir)
  FileUtils.cp_r("#{__dir__}/data/js", @doc_root)
  event = Concurrent::Event.new
  @server = WEBrick::HTTPServer.new(
    StartCallback: -> { event.set },
    Logger: WEBrick::Log.new(File.open(File::NULL, 'w')),
    AccessLog: [],
    DocumentRoot: @doc_root,
    BindAddress: 'localhost',
    Port: port
  )
  @server.mount('/map', MapServlet)
  @thread = Thread.new { @server.start }
  event.wait
  @browser = Ferrum::Browser.new(
    slowmo: 2.0,
    window_size: [5000, 5000],
    browser_options: { 'no-sandbox': nil }
  )
end

Class Method Details

.open(*args) ⇒ Object 



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# File 'lib/natour/map_geo_admin.rb', line 62

def self.open(*args)
  map = MapGeoAdmin.new(*args)
  return map unless block_given?

  yield(map)
ensure
  map&.close
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/natour/map_geo_admin.rb', line 32

def close
  @browser.quit
  @server.shutdown
  @thread.join
  FileUtils.remove_entry(@doc_root)
end

#save_image(filename, overwrite: false, gps_files: [], map_layers: [], image_size: [1200, 900]) ⇒ Object 



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# File 'lib/natour/map_geo_admin.rb', line 39

def save_image(filename, overwrite: false, gps_files: [], map_layers: [], image_size: [1200, 900])
  FileUtils.cp(gps_files, @doc_root)
  uri = URI("http://#{@server[:BindAddress]}:#{@server[:Port]}/map")
  uri.query = URI.encode_www_form(
    'gps-files': gps_files.map { |gps_file| Pathname(gps_file).basename }.join(','),
    'map-layers': map_layers.join(','),
    'map-size': image_size.map { |dim| dim.is_a?(String) ? dim : "#{dim}px" }.join(',')
  )
  @browser.goto(uri)
  tmp_filename = @doc_root.join(Pathname(filename).basename)
  @browser.screenshot(
    path: tmp_filename,
    quality: 100,
    selector: '.map'
  )
  FileUtils.mkdir_p(Pathname(filename).dirname)
  mode = File::WRONLY | File::CREAT | File::TRUNC | File::BINARY
  mode |= File::EXCL unless overwrite
  File.open(filename, mode) do |file|
    file.write(File.read(tmp_filename, mode: 'rb'))
  end
end