class FuzzyDate

Constants

FORMAT_2_REGEX

Attributes

max_fuzz[RW]

Public Class Methods

new(max_fuzz=2) click to toggle source

# File lib/fuzzy_matcher/fuzzy_date.rb, line 24
def initialize(max_fuzz=2)
  @fsub     = FuzzySub.new FuzzySub::CHAR_2_NUM_SUB
  @max_fuzz = max_fuzz
  @scanners = [] 
  FORMAT_2_REGEX.each do |key, value|
    register key, value
  end
end

Public Instance Methods

fscan(string, fuzziness=2) click to toggle source

allow fuzziness of 2 by default

# File lib/fuzzy_matcher/fuzzy_date.rb, line 38
def fscan(string, fuzziness=2)
  @scanners.map do |fdscan|
    matches = fdscan.fscan!(string, fuzziness)
    [matches, fdscan.format] if !matches.empty?
  end.compact
end

matches_to_dates(matches) click to toggle source

# File lib/fuzzy_matcher/fuzzy_date.rb, line 77
def matches_to_dates(matches)
  dates = []
  matches.each do |m|
    # p "#{self.class.to_s} match: #{m[0]} with format #{m[1]}"
    strings = m[0]
    format  = m[1]
    
    strings.each do |str|
      k = validaterize str, format
      # p "#{k[0]}, #{k[1]}"
      begin
        date = Date.strptime(k[0], k[1])
        dates << date
      rescue ArgumentError
        # p "String #{k[0]} is not valide date for date format #{k[1]}"
      end
    end
  end
  dates
end

# File lib/fuzzy_matcher/fuzzy_date.rb, line 33
def register(format, regex)
  @scanners << FuzzyDateScanner.new(format, regex)
end

to_date(string) click to toggle source

iteratively find the dates, try fuzziness 1 and then 2

# File lib/fuzzy_matcher/fuzzy_date.rb, line 99
def to_date(string)
  dates = []
  fuzz = 1
  while fuzz <= @max_fuzz do
    matches = fscan string, fuzz
    dates   = matches_to_dates matches
    break if !dates.empty?
    fuzz = fuzz + 1
  end
  dates
end

validaterize(m, format) click to toggle source

# File lib/fuzzy_matcher/fuzzy_date.rb, line 45
def validaterize(m, format)
  str    = m[0]
  
  case format
  when "%Y-%m-%d"
    date = @fsub.fsub!(m[3])
    mont = @fsub.fsub!(m[2])
    year = @fsub.fsub!(m[1])
    str  = "#{year}-#{mont}-#{date}"
  when "%m/%d/%Y"
    date = @fsub.fsub!(m[2])
    mont = @fsub.fsub!(m[1])
    year = @fsub.fsub!(m[3])
    format = "%m/%d/%y" if year.length < 4
    str    = "#{mont}/#{date}/#{year}"
  when "%d/%m/%Y"
    date = @fsub.fsub!(m[1])
    mont = @fsub.fsub!(m[2])
    year = @fsub.fsub!(m[3])
    format = "%d/%m/%y" if year.length < 4
    str    = "#{date}/#{mont}/#{year}"
  when "%d%b%Y"
    date = @fsub.fsub!(m[1])
    mont = m[2].upcase
    year = @fsub.fsub!(m[3])
    format = "%d%b%y"   if year.length < 4
    str    = "#{date}#{mont}#{year}"
  end
  
  [str.strip, format]
end