Class: Rawfeed::Build::ImageMinifier

Inherits:
Object
  • Object
show all
Defined in:
lib/rawfeed/build/image_minifier.rb

Constant Summary collapse

BUILD_DIR = 
"_site"
IMAGE_FORMATS = 
%w[jpg jpeg png].freeze
QUALITY_JPEG = 
75
QUALITY_WEBP = 
75
QUALITY_AVIF = 
50

Class Method Summary collapse

Class Method Details

.format_bytes(bytes) ⇒ Object 



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# File 'lib/rawfeed/build/image_minifier.rb', line 136

def self.format_bytes(bytes)
  if bytes >= 1_000_000
    "#{(bytes.to_f / 1_000_000).round(2)}MB"
  elsif bytes >= 1_000
    "#{(bytes.to_f / 1_000).round(2)}KB"
  else
    "#{bytes}B"
  end
end

.green_checkmark ⇒ Object 



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# File 'lib/rawfeed/build/image_minifier.rb', line 146

def self.green_checkmark
  "✔".green
end

.minify_images ⇒ Object 



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# File 'lib/rawfeed/build/image_minifier.rb', line 19

def self.minify_images
  begin
    require "mini_magick"
  rescue LoadError
    # mini_magick is optional, but let user know they need it OR ImageMagick
  end

  # Check if ImageMagick is installed
  begin
    system("identify -version > /dev/null 2>&1")
    unless $?.success?
      raise "ImageMagick not found"
    end
  rescue => e
    puts "[!] Error: ImageMagick is not installed or not found in PATH".red
    puts "".red
    if RUBY_PLATFORM.include?("linux")
      if File.exist?("/etc/arch-release")
        puts "    Arch Linux: sudo pacman -S imagemagick".yellow
      else
        puts "    Ubuntu/Debian: sudo apt-get install imagemagick".yellow
      end
    elsif RUBY_PLATFORM.include?("darwin")
      puts "    macOS: brew install imagemagick".yellow
    elsif RUBY_PLATFORM.include?("mingw") || RUBY_PLATFORM.include?("mswin")
      puts "    Windows: https://imagemagick.org/script/download.php".yellow
    else
      puts "    See: https://imagemagick.org/script/download.php".yellow
    end
    exit 1
  end

  puts "Minifying images...".yellow

  image_files = Dir.glob("#{BUILD_DIR}/assets/images/**/*.{jpg,jpeg,png}", File::FNM_CASEFOLD)

  if image_files.empty?
    puts "No images found."
    return
  end

  puts "Found #{image_files.length} images\n".cyan

  total_before = 0
  total_after = 0
  successful = 0
  failed = 0

  image_files.each do |file|
    begin
      before_size = File.size(file)
      total_before += before_size

      # Get file info
      dir = File.dirname(file)
      basename = File.basename(file, File.extname(file))

      # Process with ImageMagick convert command
      # Use 'magick convert' for ImageMagick 7+, fallback to 'convert' for older versions
      converter = system("magick --version > /dev/null 2>&1") ? "magick convert" : "convert"

      # 1. Compress original to JPEG
      temp_jpeg = "#{file}.temp.jpg"
      cmd_jpeg = "#{converter} #{shell_escape(file)} -quality #{QUALITY_JPEG} -strip #{shell_escape(temp_jpeg)} 2>/dev/null"
      system(cmd_jpeg)

      if File.exist?(temp_jpeg) && File.size(temp_jpeg) > 0
        FileUtils.mv(temp_jpeg, file)
        jpeg_size = File.size(file)
        total_after += jpeg_size
        successful += 1

        # Create WebP version
        webp_path = File.join(dir, "#{basename}.webp")
        cmd_webp = "#{converter} #{shell_escape(file)} -quality #{QUALITY_WEBP} #{shell_escape(webp_path)} 2>/dev/null"
        system(cmd_webp)

        # Create AVIF version
        avif_path = File.join(dir, "#{basename}.avif")
        cmd_avif = "#{converter} #{shell_escape(file)} -quality #{QUALITY_AVIF} #{shell_escape(avif_path)} 2>/dev/null"
        system(cmd_avif)

        # Display progress
        human_before = format_bytes(before_size)
        human_after = format_bytes(jpeg_size)
        puts "  #{green_checkmark} #{file} #{neutral("(#{human_before} → #{human_after})")}"
      else
        failed += 1
        FileUtils.rm(temp_jpeg) if File.exist?(temp_jpeg)
        puts "  #{red_x} #{file} #{red("(Failed to convert)")}"
      end
    rescue => e
      failed += 1
      puts "  #{red_x} #{file} #{red("(#{e.message}")}\n"
    end
  end

  # Display summary
  if successful > 0
    saved = total_before - total_after
    human_before = format_bytes(total_before)
    human_after = format_bytes(total_after)
    human_saved = format_bytes(saved)

    puts ""
    puts "Images optimized: #{human_before} → #{human_after} (saved #{human_saved})".bold.green
    puts "  Successful: #{successful}, Failed: #{failed}".cyan if failed > 0
    puts ""
  elsif failed > 0
    puts ""
    puts "No images were processed (#{failed} failed)".red
    puts ""
  end
end

.neutral(text) ⇒ Object 



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# File 'lib/rawfeed/build/image_minifier.rb', line 154

def self.neutral(text)
  text
end

.red(text) ⇒ Object 



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# File 'lib/rawfeed/build/image_minifier.rb', line 158

def self.red(text)
  text.red
end

.red_x ⇒ Object 



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# File 'lib/rawfeed/build/image_minifier.rb', line 150

def self.red_x
  "✗".red
end

.shell_escape(path) ⇒ Object 



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# File 'lib/rawfeed/build/image_minifier.rb', line 15

def self.shell_escape(path)
  "'#{path.to_s.gsub("'", "'\\\\''")}'"
end