Class: Exiftool::FieldParser

Inherits:
Object
  • Object
show all
Defined in:
lib/exiftool/field_parser.rb

Overview

Exiftool FiledParser Class

Constant Summary collapse

WORD_BOUNDARY_RES = 
[/([A-Z\d]+)([A-Z][a-z])/, /([a-z\d])([A-Z])/].freeze
FRACTION_RE = 
%r{^(\d+)/(\d+)$}.freeze
YMD_RE = 
/\A(\d{4}):(\d{2}):(\d{2})\b/.freeze
ZERO_DATE_RE = 
/\A[+:0 ]+\z/.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key, raw_value) ⇒ FieldParser

Returns a new instance of FieldParser.



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# File 'lib/exiftool/field_parser.rb', line 15

def initialize(key, raw_value)
  @key = key
  @display_key = WORD_BOUNDARY_RES.inject(key) { |k, regex| k.gsub(regex, '\1 \2') }
  @sym_key = display_key.downcase.gsub(' ', '_').to_sym
  @raw_value = raw_value
end

Instance Attribute Details

#display_key ⇒ Object (readonly)

Returns the value of attribute display_key.



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# File 'lib/exiftool/field_parser.rb', line 13

def display_key
  @display_key
end

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/exiftool/field_parser.rb', line 13

def key
  @key
end

#raw_value ⇒ Object (readonly)

Returns the value of attribute raw_value.



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# File 'lib/exiftool/field_parser.rb', line 13

def raw_value
  @raw_value
end

#sym_key ⇒ Object (readonly)

Returns the value of attribute sym_key.



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# File 'lib/exiftool/field_parser.rb', line 13

def sym_key
  @sym_key
end

Instance Method Details

#civil_date ⇒ Object 



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# File 'lib/exiftool/field_parser.rb', line 38

def civil_date
  return unless date? && !zero_date?

  ymd = raw_value.scan(YMD_RE).first
  return unless ymd

  ymd_a = ymd.map(&:to_i)
  Date.civil(*ymd_a) if Date.valid_civil?(*ymd_a)
end

#value ⇒ Object 



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# File 'lib/exiftool/field_parser.rb', line 22

def value
  @value ||= if lat_long?
               as_lat_long
             elsif date?
               as_date
             elsif fraction?
               as_fraction
             else
               raw_value
             end
rescue StandardError => e
  # :nocov:
  "Warning: Parsing '#{raw_value}' for attribute '#{key}' raised #{e.message}"
  # :nocov:
end