Class: Exiftool::FieldParser

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

Constant Summary collapse

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

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 14

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 12

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 12

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 12

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 12

def sym_key
  @sym_key
end

Instance Method Details

#civil_date ⇒ Object 



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# File 'lib/exiftool/field_parser.rb', line 35

def civil_date
  if date? && !zero_date?
    ymd = raw_value.scan(YMD_RE).first
    if (ymd) then
        ymd_a = ymd.map { |ea| ea.to_i }
        Date.civil(*ymd_a) if Date.valid_civil?(*ymd_a)
    end
  end
end

#value ⇒ Object 



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# File 'lib/exiftool/field_parser.rb', line 21

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