Class: Photo::EXIFData

Inherits:
Object
  • Object
show all
Defined in:
lib/models/photo.rb

Constant Summary collapse

EXIF_TRANSLATIONS = 
{
  :title => ['Title','ObjectName'],
  :focal_length => ['FocalLength'],
  :iso => ['ISO'],
  :height => ['ImageHeight'],
  :width => ['ImageWidth'],
  :shutter_speed => ['ShutterSpeedValue'],
  :f_stop => ['ApertureValue'],
  :lens => ['Lens','LensType'],
  :camera => ['Model'],
  :date => ['DateTimeOriginal'],
  :caption => ['Description','ImageDescription','Caption-Abstract'],
  :tags => ['Keywords','Subject'],
  :location => ['Location'],
}
EXIF_TRANSFORMATIONS = 
{
  #:date => lambda{|exif_value| exif_value.to_s.split('-').shift},
  :shutter_speed => lambda{|exif_value| exif_value.to_s.gsub(/1\//,'')},
  :focal_length => lambda{|exif_value| exif_value.to_s.gsub(/\.([\d]{1,})?\s?.+$/,'')},
  :tags => lambda{|exif_value| (exif_value.is_a?(Array) ? exif_value.join(',') : exif_value).gsub(/["']+/,'').gsub(/\s+?,\s+?/,',').split(',').collect(&:strip).collect(&:downcase)}
}

Instance Method Summary collapse

Constructor Details

#initialize(exif_data, logger) ⇒ EXIFData

Returns a new instance of EXIFData.



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# File 'lib/models/photo.rb', line 141

def initialize(exif_data,logger)
  @exif_data = exif_data
  @logger = logger
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/models/photo.rb', line 146

def [](key)
  EXIF_TRANSLATIONS[key.to_sym].each do |exif_key_name|
    exif_value = @exif_data[exif_key_name.to_s]
    if !exif_value.nil? && exif_value != false && exif_value != '' && exif_value != 'false' && exif_value != 'nil'
      return EXIF_TRANSFORMATIONS[key] ? EXIF_TRANSFORMATIONS[key].call(exif_value) : exif_value
    end
  end
  false
end