Module: RScale

Extended by:
UUID
Defined in:
lib/rscale/uuid.rb,
lib/rscale/errors.rb,
lib/rscale/format.rb,
lib/rscale/rscale.rb,
lib/rscale/processor.rb,
lib/rscale/configuration.rb

Defined Under Namespace

Modules: Processor, UUID Classes: ConfigError, Configuration, Format, FormatError, ProcessingError

Constant Summary collapse

@@config = 
nil
@@formats = 
{}

Class Method Summary collapse

Methods included from UUID

uuid, uuid_local, uuid_system

Class Method Details

.config ⇒ Object

Get current RScale configuration



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# File 'lib/rscale/rscale.rb', line 14

def self.config
  @@config
end

.configure {|@@config| ... } ⇒ Object

Configure RScale

Yields:



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# File 'lib/rscale/rscale.rb', line 8

def self.configure
  @@config = Configuration.new if @@config.nil?
  yield @@config
end

.format(name) ⇒ Object

Add new format



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# File 'lib/rscale/rscale.rb', line 19

def self.format(name)
  unless @@formats.key?(name)
    @@formats[name] = Format.new(name)
    yield @@formats[name] if block_given?
  else
    raise FormatError, "Format with name [#{name.to_s}] is already defined"
  end
end

.formats ⇒ Object

Get list of formats



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# File 'lib/rscale/rscale.rb', line 29

def self.formats
  @@formats
end

.image_for(format, file) ⇒ Object

Generate thumbnails for the image format



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# File 'lib/rscale/rscale.rb', line 34

def self.image_for(format, file)
  if @@formats.key?(format.to_sym)
    fmt = @@formats[format.to_sym]
    file_info = File.get_info(file)
    url = fmt.url
    image = {}
    
    options = file_info.merge(:format => fmt.name)
    
    options[:time] = Time.now.to_i unless url[':time'].nil?
    options[:md5] = Digest::MD5.filedigest(file) unless url[':md5'].nil?
    unless url[':uuid'].nil?
      options[:uuid] = uuid
      options[:uuid_dir] = "#{options[:uuid][0,2]}/#{options[:uuid][2,2]}"
    end
    
    fmt.styles.each_pair do |k,v|
      url = fmt.url.placeholders(options.merge(v))
      file_out = @@config.public + "/#{url}"
      if Processor.process(file, file_out, v)
        image[k] = url
      end
    end
    
    return image.size == fmt.styles.size ? image : nil
  else
    raise ArgumentError, "Format #{format.to_s} cannot be found!"
  end
end