Class: SycTimeleap::TimeLeap

Inherits:
Object
  • Object
show all
Defined in:
lib/syctimeleap/time_leap.rb

Overview

Base class for date operations

Constant Summary collapse

WEEKDAYS =

Holds the weekdays of the week starts with sunday at index 0

{ "su" => [0, "sunday"], 
"mo" => [1, "monday"], 
"tu" => [2, "tuesday"],
"we" => [3, "wednesday"], 
"th" => [4, "thursday"], 
"fr" => [5, "friday"],
"sa" => [6, "saturday"] }

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(date = Time.now.to_date) ⇒ TimeLeap

Creates a new Temp and initializes it with the current date if no date is provided



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# File 'lib/syctimeleap/time_leap.rb', line 23

def initialize(date = Time.now.to_date)
  @now = date
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args) ⇒ Object

Provides the date calculation methods dynamically



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# File 'lib/syctimeleap/time_leap.rb', line 28

def method_missing(name, *args)
  add_regex = %r{
    ^([ib])(?:n|ack)?
    (?:\.|_|-| )?
    (\d+)
    (?:\.|_|-| )?
    ([dwmy])
    (?:ays?|eeks?|onths?|ears?)?$
  }x

  weekday_regex = %r{
    ^(tod|tom|y)(?:a?y?|o?r?r?o?w?|e?s?t?e?r?d?a?y?)?$
  }xi
  
  next_weekday_regex = %r{
    ^(n|p)(?:e?x?t|r?e?v?i?o?u?s?)?
    (?:\.|_| |-)?
    (mo|tu|we|th|fr|sa|su)
    (?:n?|e?s?|d?n?e?s?|u?r?s?|i?|t?u?r?|n?)(?:d?a?y?)$ 
  }xi

  next_weekday_in_regex = %r{
    ^(mo|tu|we|th|fr|sa|su)
    (?:n?|e?s?|d?n?e?s?|u?r?s?|i?|t?u?r?|n?)(?:d?a?y?)(?:_?)
    (i|b)
    (?:n?|a?c?k?)(?:_?)
    (\d+)(?:_?)([dwmy])(?:a?y?s?|e?e?k?s?|o?n?t?h?s?|e?a?r?s?)$
  }xi

  return add($1, $2, $3)      if name =~ add_regex
  return weekday($1)          if name =~ weekday_regex
  return next_weekday($1, $2) if name =~ next_weekday_regex
  return next_weekday_in($1, $2, $3, $4) if name =~ next_weekday_in_regex
  super 
end

Instance Attribute Details

#now ⇒ Object

The base date that is used to calculate date operations



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# File 'lib/syctimeleap/time_leap.rb', line 19

def now
  @now
end

Instance Method Details

#add(direction, count, distance) ⇒ Object

Determines whether to move back or forward in time and returns the distance in days, weeks, months or years Example: move(10, ‘d’) adds 10 days to :now



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# File 'lib/syctimeleap/time_leap.rb', line 67

def add(direction, count, distance)
  count = direction.downcase == 'b' ? -count.to_i : count.to_i

  case distance
  when 'd'
    @now + count
  when 'w'
    @now + count * 7
  when 'm'
    @now >> count
  when 'y'
    @now >> count * 12
  end

end

#next_weekday(direction, abbreviated_weekday) ⇒ Object

Returns the next or previous weekday Exampel: next_monday or n_mo Su Mo Tu We Th Fr Sa

0  1  2  3  4  5  6
   x                 Today
         *           Next Wednesday
                     @now + (3 - 1 + 7) % 7 = +2
            x        Today 
*                    Next Sunday
                     @now + (0 - 4 + 7) % 7 = +3
      x              Today
         *           Previous Wednesday
                     @now + (3 - 2 + 7) % -7 = -6
             x       Today
      *              Previous Tuesday
                     @now + (2 - 4 + 7) % -7 = -2



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# File 'lib/syctimeleap/time_leap.rb', line 111

def next_weekday(direction, abbreviated_weekday)
  count = direction.downcase == 'n' ? 1 : -1

  weekday = WEEKDAYS[abbreviated_weekday.downcase]
  raise "No valid weekday: #{abbreviated_weekday}" if weekday.nil?

  offset = @now.send("#{weekday[1]}?") ? count * 7 : 0
  @now + (weekday[0] - @now.wday + 7) % (count * 7) + offset
end

#next_weekday_in(weekday_abbreviation, direction, count, distance) ⇒ Object

Returns the next weekday in n days, weeks, month or years Example: monday_in_3_weeks or mo_i_3_w



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# File 'lib/syctimeleap/time_leap.rb', line 123

def next_weekday_in(weekday_abbreviation, direction, count, distance)
  count = direction.downcase == 'b' ? -count.to_i : count.to_i
  weekday = WEEKDAYS[weekday_abbreviation.downcase]

  case distance.downcase
  when "d"
  when "w"
    (@now + count * 7) + weekday[0] - @now.wday  
  when "m"
    future = @now >> count
    future + weekday[0] - future.wday
  when "y"
    future = @now >> count * 12
    future + weekday[0] - future.wday
  end
end

#weekday(weekday) ⇒ Object

Returns yesterday, today or tomorrow



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# File 'lib/syctimeleap/time_leap.rb', line 84

def weekday(weekday)
  case weekday
  when 'tod'
    @now
  when 'tom'
    @now + 1
  when 'y'
    @now - 1
  end
end