Module: EasyTag::Utilities

Defined in:
lib/easytag/util.rb

Constant Summary collapse

YEAR_RE =

1800-2099

/(1[89]|20)\d{2}/
MONTH_RE =

01-12

/(0[1-9]|1[0-2])/
DAY_RE =

matches 01-31

/(0[1-9]|[12][0-9]|3[01])/

Class Method Summary collapse

Class Method Details

.get_datetime(date_str) ⇒ Object

get_datetime

return a DateTime object for a given string



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# File 'lib/easytag/util.rb', line 12

def self.get_datetime(date_str)
  return nil if date_str.nil?

  # DateTime can't handle 00, so replace days/months that are 00 with 01
  #   (currently only works with YYYY-MM-DD)
  until date_str[/\-(00)\-?/].nil?
    date_str[/\-(00)\-?/, 1] = '01'
  end

  # check for known possible formats
  case date_str
  when /^#{YEAR_RE}$/
    datetime = DateTime.strptime(date_str, '%Y')
  when /^#{YEAR_RE}\-#{MONTH_RE}$/ # YYYY-MM
    datetime = DateTime.strptime(date_str, '%Y-%m')
  when /^#{YEAR_RE}#{DAY_RE}#{MONTH_RE}$/ # YYYYDDMM (TYER+TDAT)
    datetime = DateTime.strptime(date_str, '%Y%d%m')
  else
    datetime = nil
  end

  # let DateTime try to parse the stored date as a last resort
  if datetime.nil?
    begin
      datetime = DateTime.parse(date_str)
    rescue ArgumentError
      warn "DateTime couldn't parse '#{date_str}'"
    end
  end

  # try to get the year at the least (don't attempt if date_str is a year)
  if datetime.nil? && !date_str.match(YEAR_RE).to_s.eql?(date_str)
    warn 'Falling back to year-only parsing'
    datetime = get_datetime(date_str.match(YEAR_RE).to_s)
  end

  datetime
end

.get_int_pair(str) ⇒ Object

get_int_pair

Parses a pos/total string and returns a pair of ints



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# File 'lib/easytag/util.rb', line 54

def self.get_int_pair(str)
  pair = [0, 0]

  unless str.nil? || str.empty?
    if str.include?('/')
      pair = str.split('/').map { |it| it.to_i }
    else
      pair[0] = str.to_i
    end
  end

  pair
end

.normalize_object(object) ⇒ Object 



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# File 'lib/easytag/util.rb', line 78

def self.normalize_object(object)
  if object.is_a?(String)
    normalize_string(object)
  elsif object.is_a?(Symbol)
    normalize_string(object.to_s).to_sym
  elsif object.is_a?(Array)
    new_array = []
    object.each { |item| new_array << normalize_object(item) }
    new_array
  else
      object
  end
end

.normalize_string(str) ⇒ Object 



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# File 'lib/easytag/util.rb', line 68

def self.normalize_string(str)
  str = str.to_s
  # downcase string
  str.downcase!
  # we want snakecase
  str.gsub!(/\s/, '_')
  # we only want alphanumeric characters
  str.gsub(/\W/, '')
end