Class: Mayu::Resources::Types::Image

Inherits:
Base
  • Object
show all
Extended by:
T::Sig
Defined in:
lib/mayu/resources/types/image.rb

Defined Under Namespace

Classes: ImageDescriptor

Constant Summary collapse

FORMATS = 
T.let([:webp], T::Array[Symbol])
BREAKPOINTS = 
T.let(
  [120, 240, 320, 640, 768, 960, 1024, 1366, 1600, 1920, 3840].freeze,
  T::Array[Integer]
)
MarshalFormat = 
T.type_alias { [ImageDescriptor, T::Array[ImageDescriptor], String] }

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#name

Constructor Details

#initialize(resource) ⇒ Image

Returns a new instance of Image.



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# File 'lib/mayu/resources/types/image.rb', line 37

def initialize(resource)
  @resource = resource

  content_hash = Base64.urlsafe_encode64(resource.content_hash)
  image_size = ImageSize.path(resource.absolute_path)

  extname = File.extname(resource.path)
  filename = "#{content_hash}.#{image_size.format}"

  @original =
    T.let(
      ImageDescriptor.new(
        format: image_size.format,
        width: image_size.width,
        height: image_size.height,
        filename: filename
      ),
      ImageDescriptor
    )

  breakpoints =
    BREAKPOINTS.select { _1 < image_size.width }.sort.reverse
  aspect_ratio = image_size.height / image_size.width.to_f

  formats = [image_size.format, *FORMATS].uniq

  @blur =
    T.let(
      [
        "convert",
        resource.absolute_path,
        "-resize",
        "16x16>",
        "-strip",
        "png:-"
      ].then { Shellwords.shelljoin(_1) }
        .then { `#{_1}` }
        .then { Base64.strict_encode64(_1) }
        .prepend("data:image/png;base64,"),
      String
    )

  @versions =
    T.let(
      formats
        .map do |format|
          breakpoints.map do |width|
            ImageDescriptor.new(
              format: format,
              width:,
              height: (width * aspect_ratio).to_i,
              filename: "#{content_hash}#{width}w.#{format}"
            )
          end
        end
        .flatten,
      T::Array[ImageDescriptor]
    )
end

Instance Attribute Details

#blur ⇒ Object (readonly)

Returns the value of attribute blur.



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# File 'lib/mayu/resources/types/image.rb', line 34

def blur
  @blur
end

#original ⇒ Object (readonly)

Returns the value of attribute original.



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# File 'lib/mayu/resources/types/image.rb', line 30

def original
  @original
end

#versions ⇒ Object (readonly)

Returns the value of attribute versions.



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# File 'lib/mayu/resources/types/image.rb', line 32

def versions
  @versions
end

Instance Method Details

#aspect_ratio ⇒ Object 



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# File 'lib/mayu/resources/types/image.rb', line 145

def aspect_ratio
  original.width / original.height.to_f
end

#assets ⇒ Object 



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# File 'lib/mayu/resources/types/image.rb', line 98

def assets
  [
    Asset.new(
      @original.filename,
      Generators::CopyFile.new(@resource.absolute_path)
    ),
    *@versions.map do |version|
      Asset.new(
        version.filename,
        Generators::Image.new(@resource.absolute_path, version)
      )
    end
  ]
end

#generate_assets(asset_dir) ⇒ Object 



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# File 'lib/mayu/resources/types/image.rb', line 114

def generate_assets(asset_dir)
  assets.each { |asset| asset.process(asset_dir) }
end

#inspect ⇒ Object 



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# File 'lib/mayu/resources/types/image.rb', line 163

def inspect
  "#<Image src=#{src.inspect}>"
end

#marshal_dump ⇒ Object 



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# File 'lib/mayu/resources/types/image.rb', line 153

def marshal_dump
  [@original, @versions, @blur]
end

#marshal_load(args) ⇒ Object 



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# File 'lib/mayu/resources/types/image.rb', line 158

def marshal_load(args)
  @original, @versions, @blur = args
end

#sizes ⇒ Object 



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# File 'lib/mayu/resources/types/image.rb', line 133

def sizes
  [
    "100vw",
    *@versions
      .filter { _1.format == :webp }
      .map do |version|
        "(max-width: #{version.width}px) #{version.width}px"
      end
  ].reverse.join(", ")
end

#src ⇒ Object 



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# File 'lib/mayu/resources/types/image.rb', line 119

def src
  "/__mayu/static/#{@original.filename}"
end

#srcset ⇒ Object 



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# File 'lib/mayu/resources/types/image.rb', line 124

def srcset
  [@original, *@versions.filter { _1.format == :webp }].map do |version|
      "/__mayu/static/#{version.filename} #{version.width}w"
    end
    .reverse
    .join(",")
end