Sha256: de87609e449a531f1a07b924d87783a0cd0c7f2184d064313c70e86767af1985
Contents?: true
Size: 1.33 KB
Versions: 13
Compression:
Stored size: 1.33 KB
Contents
require 'json'
require 'rational'
class ExifData < Hash
include RubyLess::SafeClass
# You can create new ExifData objects with either a json representation (String), a
# hash of key => value or an array of key,value pairs.
def initialize(data)
if data.kind_of?(String)
replace JSON::parse(data) rescue {}
elsif data.kind_of?(Hash)
replace data
elsif data.kind_of?(Array)
replace Hash[*data.flatten] rescue {}
else
# ignore
end
end
['DateTime', 'DateTimeOriginal', 'DateTimeDigitised'].each do |k|
method = k.underscore.to_sym
safe_method method => Time
define_method(method) do
date_from_field(k)
end
end
['GPSLongitude', 'GPSLatitude'].each do |k|
method = k.underscore.to_sym
safe_method method => Number
define_method(method) do
position_from_field(k)
end
end
private
def date_from_field(k)
return nil unless v = self[k]
Time.parse(v.sub(/(....):(..):(..) /, '\1-\2-\3 ')) rescue nil
end
def position_from_field(k)
return nil unless v = self[k]
if v =~ /(-?\d+)\/(\d+),\s*(-?\d+)\/(\d+),\s*(-?\d+)\/(\d+)/
deg = Rational($1.to_i, $2.to_i)
min = Rational($3.to_i, $4.to_i)
sec = Rational($5.to_i, $6.to_i)
deg + min/60.0 + sec/3600.0
else
nil
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems