module DateFormat

# File lib/date_format/base.rb, line 3
def self.change_to(element, format_type)
  begin
    unless element.nil? || element == ""
      element.strftime(choose_date_format(format_type))
    else
      "NA"
    end
  rescue
    element
  end
end

# File lib/date_format/base.rb, line 15
def self.choose_date_format(format_type)
  case format_type      
  when "ISO_8601_FORMAT"                              # => 2014-05-15
      "%F"
    when "GENERAL_DATE"                               # => 4/3/93 05:34:00 PM
      "%m/%d/%y %r"
    when "LONG_DATE"                                  # => Saturday, April 3, 2014
      "%A, %B %d, %Y"
    when "MEDIUM_DATE"                                # => 3-Apr-2014
      "%d-%b-%Y"
    when "SHORT_DATE"                                 # => 4/3/93
      "%D"
    when "LONG_TIME"                                  # => 5:34:23 PM
      "%r"
    when "MEDIUM_TIME"                                # => 5:34 PM
      "%H:%M %p"
    when "SHORT_TIME"                                 # => 17:34
      "%H:%M"
    when "WEEK_OF_YEAR"                               # => 19
      "%W"
    when "DAY_IN_MONTH"                               # => 3
      "%d"
    when "JULIAN_DAY"                                 # => 2014
      "%G"
    when "ONLY_HOUR_IN_24HOUR_FORMAT"                 # => 13 Hour
      "%H"
    when "HOURS_IN_24HOUR_FORMAT"                     # => 13:34 Hour:Minute
      "%H:%M"
    when "MINUTE_IN_HOUR"                             # => 34 Minute
      "%M"
    when "LONG_DATE_SHORT"                            # => Sat, April 3, 2014***
      "%a, %B %d, %Y"
    when "ONLY_DATE"                                  # => April 3, 2014***
      "%B %d, %Y"
    when "ONLY_DATE_SHORT"                            # => Apr 3, 2014***
      "%b %d, %Y"
    when "ONLY_DATE_SHORTEST"                         # => Sat, Apr 3, 2014***
      "%a, %b %d, %Y"
    when "ONLY_DATE_DEFAULT"                          # => 3/4/2014 ***
      "%d/%m/%Y"
    when "ONLY_CURRENT_DATE_NUMBER"                   # => 3 ***
      "%d"
    when "ONLY_CURRENT_DATE_ALPHABET"                 # => Sat ***
      "%a"
    when "ONLY_CURRENT_MONTH_NUMBER"                  # => 4 ***
      "%m"
    when "ONLY_CURRENT_MONTH_ALPHABET"                # => Apr ***
      "%b"
    when "ONLY_CURRENT_YEAR_MONTH"                    # => 201404 ***
      "%Y%m"
    else
      "%d.%m.%y"
  end
end

# File lib/date_format/base.rb, line 91
def self.choose_time_difference_format(time_difference_in_second, days, hours, minutes, seconds, format_type)
  case format_type      
    
    when "DAY_ONLY"
      "#{days} Days"
    
    when "HOUR_ONLY"
      begin
        only_hours = (time_difference_in_second/3600).round(2)
      rescue
        only_hours = (time_difference_in_second/3600)
      end
      "#{only_hours} Hrs"
      
    when "MINUTE_ONLY"
      begin
        only_minutes = (time_difference_in_second/60).round(2)
      rescue
        only_minutes = (time_difference_in_second/60)
      end
      "#{only_minutes} Mins"
      
    when "SECOND_ONLY"
      "#{time_difference_in_second} Seconds"
    else
     "#{days} Days, #{hours} Hours #{minutes} Minutes #{seconds} Seconds" 
  end
end

# File lib/date_format/base.rb, line 121
def self.day_difference(start_date, end_date)
  formatted_time = ""  
  end_date = Time.now if end_date == 'PRESENT_DAY'
  time_difference_in_second = (end_date - start_date).to_i
  rest, seconds = time_difference_in_second.divmod( 60 )
  rest, minutes = rest.divmod( 60 )
  days, hours = rest.divmod( 24 )    
  
  if days > 0
    tag = (days < 2) ? "day" : "days"
    formatted_time += "#{days} #{tag} "
  end
  
  if hours > 0
    tag = (hours < 2) ? "hour" : "hours"
    formatted_time += "#{hours} #{tag} "
  end
  
  if minutes > 0
    tag = (minutes < 2) ? "minute" : "minutes"
    formatted_time += "#{minutes} #{tag} "
  end
 
  if seconds > 0
    tag = (seconds < 2) ? "second" : "seconds"
    formatted_time += "#{seconds} #{tag} "
  end
    
  formatted_time    
end

# File lib/date_format/base.rb, line 71
def self.time_difference(start_date, end_date, format_type)
  begin
    begin
      end_date = Time.now if end_date == 'PRESENT_DAY' || end_date == ''
      time_difference_in_second = (end_date - start_date).to_i
    rescue
      time_difference_in_second = (Time.now - start_date).to_i
    end

    rest, seconds = time_difference_in_second.divmod( 60 )
    rest, minutes = rest.divmod( 60 )
    days, hours = rest.divmod( 24 )

    choose_time_difference_format(time_difference_in_second, days, hours, minutes, seconds, format_type)
  rescue
    "DATE - Wrong Format"
  end
    
end