Class: Parser

Inherits:
Object show all
Defined in:
lib/pseudo_date/parser.rb

Class Method Summary collapse

Class Method Details

.parse(input) ⇒ Object 



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# File 'lib/pseudo_date/parser.rb', line 4

def self.parse(input)
  date_hash = {}
  # Minor Pre Cleanup
  input.strip!; input.gsub!('~','')
  
  date = input.split(/\/|-/).length < 3 ? nil : Date.parse(input) rescue nil
  if date
    date_hash = { :year => date.year.to_s, :month => date.month.to_s, :day => date.day.to_s }
  else
    year, month, day = parse_string(input)
    date_hash = { :year => year, :month => month, :day => day }
  end
  
  # Post parsing cleanup
  date_hash.each do |key, value|
    date_hash[key] = if value.nil?
      key.to_s == 'year' ? '0000' : '00'
    else
      date_hash[key] = value.to_s.strip
    end
  end
  
  # Cleanup the single digit values
  unless date_hash.empty?
    date_hash.each do |key,value|
      date_hash[key] = "0#{value}" if value.to_s.length == 1
    end
  end
  
  # Two character years
  if date_hash[:year].length == 2
    date_hash[:year] = date_hash[:year].to_i > Date.today.year.to_s.slice(2..4).to_i ? "19#{date_hash[:year]}" : "20#{date_hash[:year]}"
  end
  
  # Attempt to correct some known OCR issues
  if date_hash[:year].to_s.match('00') && date_hash[:year] != '0000'
    date_hash[:year] = "2#{date_hash[:year].slice(1..3)}"
  end
  
  return date_hash.empty? ? nil : date_hash
end