Class: Acbaker::AssetPack

Inherits:
Object
  • Object
show all
Defined in:
lib/acbaker/asset_pack.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(type, options = {}) ⇒ AssetPack

Returns a new instance of AssetPack.



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# File 'lib/acbaker/asset_pack.rb', line 8

def initialize(type, options = {})
  @type = type
  @processors = []
  if options[:json]
    @json_data = options[:json]
  else
    @json_file = File.join(File.dirname(File.expand_path(__FILE__)), "config", "#{type}.json")
    @json_data = JSON.parse(File.open(@json_file).read)
  end
  @images = @json_data['images']
  @options = self.defaults.merge(options)
end

Instance Attribute Details

#images ⇒ Object (readonly)

Returns the value of attribute images.



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# File 'lib/acbaker/asset_pack.rb', line 6

def images
  @images
end

#processors ⇒ Object (readonly)

Returns the value of attribute processors.



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# File 'lib/acbaker/asset_pack.rb', line 6

def processors
  @processors
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/acbaker/asset_pack.rb', line 6

def type
  @type
end

Instance Method Details

#defaults ⇒ Object 



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# File 'lib/acbaker/asset_pack.rb', line 21

def defaults
  { json: false, gravity: 'Center', strategy: 'Cover' }
end

#process(source_image_file, target_directory, &block) ⇒ Object 



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# File 'lib/acbaker/asset_pack.rb', line 25

def process(source_image_file, target_directory, &block)
  # Define variables
  json_output_file = File.join(target_directory, "Contents.json")

  # Get processors
  if @json_data['processors']&.length
    @json_data['processors'].each do |processor_spec|
      @processors.push(Object.const_get(processor_spec['type']).new(self, processor_spec['config']))
    end
  else
    @processors = [Object.const_get("Acbaker::Processors::#{@options[:strategy]}").new(self)]
  end

  # Loop through images
  @json_data['images'].each_with_index.map do |image_spec, index|
    image_size_present = image_spec['size']
    image = Magick::ImageList.new(source_image_file)
    image_spec['size'] = "#{image.columns}x#{image.rows}" unless image_size_present

    # Get size
    scale = image_spec['scale'].gsub('x', '').to_i
    if image_size_present
      (width_str, height_str) = image_spec['size'].split('x')
      width = width_str.to_i * scale
      height = height_str.to_i * scale
    else
      width = image.columns
      height = image.rows
    end

    # Get version
    if image_spec['minimum-system-version'].nil?
      version = 'ios56'
    elsif image_spec['minimum-system-version'] == '8.0'
      version = 'ios8'
    elsif image_spec['minimum-system-version'] == '7.0'
      version = 'ios78'
    else
      version = 'ios56'
    end

    # process image
    @processors.each do |processor|
      image = processor.run(image, image_spec, width, height)
    end

    # Generate filename
    if image_spec["filename"]
      filename = image_spec["filename"]
    else
      filename_array = []
      filename_array.push(@type)
      filename_array.push(image_spec['idiom']) if image_spec['idiom']
      filename_array.push(image_spec['orientation']) if image_spec['orientation']
      filename_array.push(version)

      # Add subtype
      if image_spec['subtype']
        case image_spec['subtype']
        when '736h'
          filename_array.push('retina-hd-55')
        when '667h'
          filename_array.push('retina-hd-47')
        else
          filename_array.push(image_spec['subtype'])
        end
      end

      # Add extent
      filename_array.push(image_spec['extent']) if image_spec['extent']

      # Add size
      filename_array.push(image_spec['size'])

      if scale > 1
        filename = "#{filename_array.join('-')}@#{scale}x.png"
      else
        filename = "#{filename_array.join('-')}.png"
      end
    end

    # save image
    image.write("#{target_directory}/#{filename}")

    # Trigger Callback proc
    block&.call("#{target_directory}/#{filename}", index + 1)

    # Update json data
    image_spec['filename'] = filename
  end

  # Save Contents.json
  @json_data.delete('processors')
  File.open(json_output_file, "w") do |f|
    f.write(JSON.pretty_generate(@json_data))
  end

  true
end