Class: Dimension::Scanner

Inherits:
Object
  • Object
show all
Defined in:
lib/dimension/scanner.rb

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ Scanner

Returns a new instance of Scanner.



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# File 'lib/dimension/scanner.rb', line 9

def initialize(opts = {})
  raise "Search root path required." unless opts[:root]
  @root = File.expand_path(opts.delete(:root))
  @log_output = opts.delete(:log_output) || STDOUT
end

Instance Method Details

#process(content) ⇒ Object 



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# File 'lib/dimension/scanner.rb', line 15

def process(content)
  images = content.scan(/([a-z\-_0-9\/\:\.]*\.(jpg|jpeg|png|gif))/i)
  return [] if images.empty?

  paths = images.map { |img| URI.parse(img[0]).path }.uniq
  paths.map do |path|

    full = File.join(@root, path)
    if File.exist?(full)
      logger.info "Image exists in #{@root}: #{path}"
      next
    end

    logger.info "Image not found! #{path}"
    no_extension = File.basename(path, File.extname(path))

    if geometry = no_extension[/((\d+)?x(\d+)?.?)$/i, 1]
      original = File.join(@root, path.sub(/-?#{geometry}/, ''))

      if File.exist?(original)
        if resize_image(original, geometry, full)
          logger.warn "Generated thumbnail for #{geometry} version or #{original}."
          full
        else
          logger.error "Unable to generate #{geometry} thumbnail for #{original}"
          nil
        end
      else
        logger.warn "Geometry #{geometry} was requested, but #{original} does not exist."
        nil
      end
    end
  end.compact
end