A script to get the current week of the RIT quarter.

week.rb

#!/usr/bin/ruby

require 'date'

# Dates
today = Date.today
quarterDates = {
  '20081' => Date.parse('Sep 1, 2008'),
  '20082' => Date.parse('Dec 1, 2008'),
  '20083' => Date.parse('Mar 9, 2009'),
  '20084' => Date.parse('Jun 1, 2009'),
  '20091' => Date.parse('Sep 7, 2009'),
  '20092' => Date.parse('Nov 30, 2009'),
  '20093' => Date.parse('Mar 8, 2010')
}

# Define a helper method for a quarter string
class String
  def isWinterQuarter?
    self[4,1] == '2'
  end
end

# Find current quarter
currentQuarter = nil
quarterDates.each do |quarter, startDate|
  
  # Calculate finish date (winter quarter is longer)
  quarterLength = (quarter.isWinterQuarter?) ? 88 : 74
  finishDate = startDate + quarterLength
  
  # Does today fall within the quarter?
  todayInQuarter = true if (today >= startDate && today <= finishDate)
  
  # Cut out break time for winter quarter
  if quarter.isWinterQuarter?
    breakStart = startDate + 20
    breakEnd = breakStart + 14
    todayInQuarter = false if (todayInQuarter && (today > breakStart && today < breakEnd))
  end
  
  currentQuarter = quarter if (todayInQuarter)
end

# Didn't find a quarter, on break!
if !currentQuarter
  puts "On break!"
  exit
end

# Calculate the week number
week1StartDate = quarterDates[currentQuarter] - 1
weekNum = (((today - week1StartDate).to_f / 7) + 1).floor
weekNum = weekNum - 2 if (currentQuarter.isWinterQuarter? && weekNum > 3)

# Exam week?
if weekNum > 10
  puts "It's exam week"
else
  puts "It's week #{weekNum}"
end