Class: Kronos

Inherits:
Object
  • Object
show all
Defined in:
lib/kronos.rb,
lib/version.rb

Defined Under Namespace

Modules: Version

Constant Summary collapse

IGNORE_PATTERN = 
Regexp.compile("^prior")

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#day ⇒ Object

Returns the value of attribute day.



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# File 'lib/kronos.rb', line 6

def day
  @day
end

#month ⇒ Object

Returns the value of attribute month.



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# File 'lib/kronos.rb', line 6

def month
  @month
end

#year ⇒ Object

Returns the value of attribute year.



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# File 'lib/kronos.rb', line 6

def year
  @year
end

Class Method Details

.from_hash(h) ⇒ Object 



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# File 'lib/kronos.rb', line 162

def self.from_hash(h)
  o = self.new
  o.year  = h['year']  if h['year']
  o.month = h['month'] if h['month']
  o.day   = h['day']   if h['day']
  o if o.valid?
end

.parse(string) ⇒ Object 



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# File 'lib/kronos.rb', line 170

def self.parse(string)
  self.new.parse(string)
end

Instance Method Details

#<(other) ⇒ Object 



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# File 'lib/kronos.rb', line 76

def <(other)
  if !self.year || !other.year
    false
  elsif self.year < other.year
    true
  elsif self.year > other.year
    false
  elsif self.year == other.year
    if !self.month || !other.month
      false
    elsif self.month < other.month
      true
    elsif self.month > other.month
      false
    elsif self.month == other.month
      if !self.day || !other.day
        false
      elsif self.day < other.day
        true
      elsif self.day > other.day
        false
      elsif self.day == other.day
        false
      else
        raise "Unexpected"
      end
    end
  else
    raise "Unexpected"
  end
end

#<=(other) ⇒ Object 



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# File 'lib/kronos.rb', line 108

def <=(other)
  (self < other) || (self == other)
end

#==(other) ⇒ Object 



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# File 'lib/kronos.rb', line 112

def ==(other)
  self.year == other.year &&
  self.month == other.month &&
  self.day == other.day 
end

#>(other) ⇒ Object 



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# File 'lib/kronos.rb', line 122

def >(other)
  if !self.year || !other.year
    false
  elsif self.year < other.year
    false
  elsif self.year > other.year
    true
  elsif self.year == other.year
    if !self.month || !other.month
      false
    elsif self.month < other.month
      false
    elsif self.month > other.month
      true
    elsif self.month == other.month
      if !self.day || !other.day
        false
      elsif self.day < other.day
        false
      elsif self.day > other.day
        true
      elsif self.day == other.day
        false
      else
        raise "Unexpected"
      end
    end
  else
    raise "Unexpected"
  end
end

#>=(other) ⇒ Object 



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# File 'lib/kronos.rb', line 118

def >=(other)
  (self > other) || (self == other)
end

#errors ⇒ Object 



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# File 'lib/kronos.rb', line 43

def errors
  errors = []
  if day && (!month || !year)
    errors << "if day is given, then month and year must also be given"
  elsif month && !year
    errors << "if month is given, then year must also be given"
  elsif !year
    errors << "year must be given"
  else
    if day && !((1 .. 31) === day)
      errors << "day (#{day}) must be between 1 and 31"
    end
    if month && !((1 .. 12) === month)
      errors << "month (#{month}) must be between 1 and 12"
    end
    if year && !((1970 .. 2069) === year)
      errors << "year (#{year}) must be between 1970 and 2069"
    end
    if errors.length == 0 && day && month && year
      begin
        Date.new(year, month, day)
      rescue ArgumentError
        errors << "date (#{year}-#{month}-#{day}) must be valid"
      end
    end
  end
  errors
end

#parse(string) ⇒ Object 



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# File 'lib/kronos.rb', line 10

def parse(string)
  if string.nil? || string =~ IGNORE_PATTERN
    nil # do nothing
  elsif string =~ /^\d{4}$/
    self.year = string.to_i
  elsif string =~ /^[']?(\d{2})$/
    self.year = to_full_year($1.to_i)
  else
    values = ParseDate.parsedate(string)
    if values[0]
      # ParseDate parsed a year
      self.year  = to_full_year(values[0])
      self.month = values[1]
      self.day   = values[2]
    elsif values[2]
      # ParseDate parsed a day but not a year
      self.year  = to_full_year(values[2])
      self.month = values[1]
      self.day   = nil
    end
  end
  self
end

#to_hash ⇒ Object 



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# File 'lib/kronos.rb', line 154

def to_hash
  h = {}
  h['year']  = year  if year
  h['month'] = month if month
  h['day']   = day   if day
  h
end

#to_s ⇒ Object 



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# File 'lib/kronos.rb', line 34

def to_s
  s = ""
  raise "Invalid" unless valid?
  s << "%04i" % year if year
  s << "-%02i" % month if month
  s << "-%02i" % day if day
  s
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kronos.rb', line 72

def valid?
  errors.length == 0
end