Class: Midnight::Repeater

Inherits:
Chronic::Tag
  • Object
show all
Defined in:
lib/midnight/repeater.rb

Overview

:nodoc:

Class Method Summary collapse

Class Method Details

.scan(tokens) ⇒ Object 



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# File 'lib/midnight/repeater.rb', line 3

def self.scan(tokens)
  # for each token
  tokens.each do |token|
    token = self.scan_for_24h_times(token)
    token = self.scan_for_numbers(token)
    token = self.scan_for_month_names(token)
    token = self.scan_for_day_names(token)
    token = self.scan_for_special_text(token)
    token = self.scan_for_units(token)
  end

  tokens = self.split_time_tokens(tokens)
  tokens
end

.scan_for_24h_times(token) ⇒ Object 



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# File 'lib/midnight/repeater.rb', line 24

def self.scan_for_24h_times(token)
  if token.word =~ /(2[0-3]|[01]?[0-9]):([0-5]?[0-9])/
    token.update(:time, nil, nil)
  end
  token
end

.scan_for_day_names(token) ⇒ Object 



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# File 'lib/midnight/repeater.rb', line 68

def self.scan_for_day_names(token)
  scanner = {
    /^su[nm](day)?s?$/ => :sunday,
    /^m[ou]n(day)?s?$/ => :monday,
    /^t(ue|eu|oo|u|)s(day)?s?$/ => :tuesday,
    /^tue$/ => :tuesday,
    /^we(dnes|nds|nns)day?s?$/ => :wednesday,
    /^wed$/ => :wednesday,
    /^th(urs|ers)day?s?$/ => :thursday,
    /^thu$/ => :thursday,
    /^fr[iy](day)?s?$/ => :friday,
    /^sat(t?[ue]rday)?s?$/ => :saturday,
    /^weekdays?$/ => :weekday,
  }

  day_sequence = {
    :sunday => 0,
    :monday => 1,
    :tuesday => 2,
    :wednesday => 3,
    :thursday => 4,
    :friday => 5,
    :saturday => 6,
    :weekday => '1-5',
  }

  scanner.each do |scanner_item, day|
    position_in_sequence = day_sequence[day]
    token.update(:weekday, scanner[scanner_item], 7, position_in_sequence) if scanner_item =~ token.word
  end
  token
end

.scan_for_month_names(token) ⇒ Object 



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# File 'lib/midnight/repeater.rb', line 31

def self.scan_for_month_names(token)
  scanner = {
    /^jan\.?(uary)?$/ => :january,
    /^feb\.?(ruary)?$/ => :february,
    /^mar\.?(ch)?$/ => :march,
    /^apr\.?(il)?$/ => :april,
    /^may$/ => :may,
    /^jun\.?e?$/ => :june,
    /^jul\.?y?$/ => :july,
    /^aug\.?(ust)?$/ => :august,
    /^sep\.?(t\.?|tember)?$/ => :september,
    /^oct\.?(ober)?$/ => :october,
    /^nov\.?(ember)?$/ => :november,
  /^dec\.?(ember)?$/ => :december}

  month_sequence = {
    :january => 1,
    :february => 2,
    :march => 3,
    :april => 4,
    :may => 5,
    :june => 6,
    :july => 7,
    :august => 8,
    :september => 9,
    :october => 10,
    :november => 11, 
    :december => 12
  }

  scanner.each do |scanner_item, month|
    position_in_sequence = month_sequence[month]
    token.update(:month_name, scanner[scanner_item], 30, position_in_sequence) if scanner_item =~ token.word
  end
  token
end

.scan_for_numbers(token) ⇒ Object 



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# File 'lib/midnight/repeater.rb', line 18

def self.scan_for_numbers(token)
  num = Float(token.word) rescue nil
  token.update(:number, nil, num.to_i) if num
  token
end

.scan_for_special_text(token) ⇒ Object 



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# File 'lib/midnight/repeater.rb', line 101

def self.scan_for_special_text(token)
  scanner = {
    /^other$/ => :other,
    /^begin(ing|ning)?$/ => :beginning,
    /^start$/ => :beginning,
    /^end$/ => :end,
    /^mid(d)?le$/ => :middle}
  scanner.keys.each do |scanner_item|
    token.update(:special, scanner[scanner_item], 7) if scanner_item =~ token.word
  end
  token
end

.scan_for_units(token) ⇒ Object 



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# File 'lib/midnight/repeater.rb', line 114

def self.scan_for_units(token)
  scanner = {
    /^year(ly)?s?|annually$/ => {:type => :year, :interval => 365, :start => :today},
    /^month(ly)?s?$/ => {:type => :month, :interval => 30, :start => :today},
    /^fortnights?$/ => {:type => :fortnight, :interval => 365, :start => :today},
    /^week(ly)?s?$/ => {:type => :week, :interval => 7, :start => :today},
    /^weekends?$/ => {:type => :weekend, :interval => 7, :start => :saturday},
    /^days?$/ => {:type => :day, :interval => 1, :start => :today},
    /^daily?$/ => {:type => :day, :interval => 1, :start => :today},
    /^minutes?$/ => {:type => :minute_word, :start => :today},
    /^hour(ly)?s?$/ => {:type => :hour, :start => :today},
    /^am|pm$/ => {:type => :meridiem}
  }
  scanner.keys.each do |scanner_item|
    if scanner_item =~ token.word
      token.update(scanner[scanner_item][:type], scanner[scanner_item][:start], scanner[scanner_item][:interval]) if scanner_item =~ token.word
    end
  end
  token
end

.split_time_tokens(tokens) ⇒ Object

Split time tokens into constituent hour and minute tokens



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# File 'lib/midnight/repeater.rb', line 136

def self.split_time_tokens(tokens)
  tokens_output = []
  tokens.each do |token|
    if (token.type == :time)
      time_parts = token.word.split(':')
      hour_token = Midnight::Token.new(time_parts[0].to_i)
      minute_token = Midnight::Token.new(time_parts[1].to_i)
      hour_token.update(:hour)
      minute_token.update(:minute)
      tokens_output << hour_token
      tokens_output << minute_token
    else
      tokens_output << token
    end
  end

  tokens_output
end