practice_hash.rb

require 'date'
require 'time'

MAXNUMLECTURES = 41

class ClassPeriod
	def initialize(coursetitle, lecturetitle, lecturenumber, link)
		@coursetitle = coursetitle
		@lecturetitle = lecturetitle
		@lecturenumber = lecturenumber
		@link = link
	end

	attr_accessor :coursetitle
	attr_accessor :lecturetitle
	attr_accessor :lecturenumber
	attr_accessor :link
	attr_accessor :hourOffset
	attr_accessor :dayOffset
end

class StudyHall
	def initialize(coursetitle)
		@coursetitle = coursetitle
		@lecturetitle = "Free study time! But Mama is watching..."
		@lecturenumber = "Do your homework!"
		@link = "http://www.lifehack.org/articles/productivity/50-ways-to-increase-your-productivity.html"
	end

	def updateHourOffset(hour)
		@hourOffset = hour
	end

	def updateDayOffset(day)
		@dayOffset = day
	end

	attr_accessor :coursetitle
	attr_accessor :hourOffset
	attr_accessor :dayOffset
	attr_accessor :link
end

$practicehash = [{:professor=>"Saltzman, W. Mark", :number=>"BENG 100", :link=>"/biomedical-engineering/beng-100", :department=>"Biomedical Engineering", :department_link=>"/biomedical-engineering", :title=>"Frontiers of Biomedical Engineering", :sessions=>[{:title=>"What Is Biomedical Engineering?", :link=>"/biomedical-engineering/beng-100/lecture-1"}, {:title=>"What Is Biomedical Engineering? (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-2"}, {:title=>"Genetic Engineering", :link=>"/biomedical-engineering/beng-100/lecture-3"}, {:title=>"Genetic Engineering (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-4"}, {:title=>"Cell Culture Engineering", :link=>"/biomedical-engineering/beng-100/lecture-5"}, {:title=>"Cell Culture Engineering (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-6"}, {:title=>"Cell Communication and Immunology", :link=>"/biomedical-engineering/beng-100/lecture-7"}, {:title=>"Cell Communication and Immunology (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-8"}, {:title=>"Biomolecular Engineering: Engineering of Immunity", :link=>"/biomedical-engineering/beng-100/lecture-9"}, {:title=>"Biomolecular Engineering: Engineering of Immunity (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-10"}, {:title=>"Biomolecular Engineering: General Concepts", :link=>"/biomedical-engineering/beng-100/lecture-11"}, {:title=>"Biomolecular Engineering: General Concepts (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-12"}, {:title=>"Cardiovascular Physiology", :link=>"/biomedical-engineering/beng-100/lecture-13"}, {:title=>"Cardiovascular Physiology (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-14"}, {:title=>"Cardiovascular Physiology (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-15"}, {:title=>"Midterm Exam", :link=>"/biomedical-engineering/beng-100/exam-1"}, {:title=>"Renal Physiology", :link=>"/biomedical-engineering/beng-100/lecture-16"}, {:title=>"Renal Physiology (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-17"}, {:title=>"Biomechanics and Orthopedics", :link=>"/biomedical-engineering/beng-100/lecture-18"}, {:title=>"Biomechanics and Orthopedics (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-19"}, {:title=>"Bioimaging", :link=>"/biomedical-engineering/beng-100/lecture-20"}, {:title=>"Bioimaging (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-21"}, {:title=>"Tissue Engineering", :link=>"/biomedical-engineering/beng-100/lecture-22"}, {:title=>"Tissue Engineering (cont.)", :link=>"/biomedical-engineering/beng-100/lecture-23"}, {:title=>"Biomedical Engineers and Cancer", :link=>"/biomedical-engineering/beng-100/lecture-24"}, {:title=>"Biomedical Engineers and Artificial Organs", :link=>"/biomedical-engineering/beng-100/lecture-25"}, {:title=>"Final Exam", :link=>"/biomedical-engineering/beng-100/exam-2"}], :time=>54}, {:professor=>"Shiller, Robert J.", :number=>"ECON 252", :link=>"/economics/econ-252-08", :department=>"Economics", :department_link=>"/economics", :title=>"Financial Markets (2008)", :sessions=>[{:title=>"Finance and Insurance as Powerful Forces in Our Economy and Society", :link=>"/economics/econ-252-08/lecture-1"}, {:title=>"The Universal Principle of Risk Management: Pooling and the Hedging of Risks", :link=>"/economics/econ-252-08/lecture-2"}, {:title=>"Technology and Invention in Finance", :link=>"/economics/econ-252-08/lecture-3"}, {:title=>"Portfolio Diversification and Supporting Financial Institutions (CAPM Model)", :link=>"/economics/econ-252-08/lecture-4"}, {:title=>"Insurance: The Archetypal Risk Management Institution", :link=>"/economics/econ-252-08/lecture-5"}, {:title=>"Efficient Markets vs. Excess Volatility", :link=>"/economics/econ-252-08/lecture-6"}, {:title=>"Behavioral Finance: The Role of Psychology", :link=>"/economics/econ-252-08/lecture-7"}, {:title=>"Human Foibles, Fraud, Manipulation, and Regulation", :link=>"/economics/econ-252-08/lecture-8"}, {:title=>"Guest Lecture by David Swensen", :link=>"/economics/econ-252-08/lecture-9"}, {:title=>"Debt Markets: Term Structure", :link=>"/economics/econ-252-08/lecture-10"}, {:title=>"Midterm Exam 1", :link=>"/economics/econ-252-08/exam-1"}, {:title=>"Stocks", :link=>"/economics/econ-252-08/lecture-11"}, {:title=>"Real Estate Finance and Its Vulnerability to Crisis", :link=>"/economics/econ-252-08/lecture-12"}, {:title=>"Banking: Successes and Failures", :link=>"/economics/econ-252-08/lecture-13"}, {:title=>"Guest Lecture by Andrew Redleaf", :link=>"/economics/econ-252-08/lecture-14"}, {:title=>"Guest Lecture by Carl Icahn", :link=>"/economics/econ-252-08/lecture-15"}, {:title=>"The Evolution and Perfection of Monetary Policy", :link=>"/economics/econ-252-08/lecture-16"}, {:title=>"Midterm Exam 2", :link=>"/economics/econ-252-08/exam-2"}, {:title=>"Investment Banking and Secondary Markets", :link=>"/economics/econ-252-08/lecture-17"}, {:title=>"Professional Money Managers and Their Influence", :link=>"/economics/econ-252-08/lecture-18"}, {:title=>"Brokerage, ECNs, etc.", :link=>"/economics/econ-252-08/lecture-19"}, {:title=>"Guest Lecture by Stephen Schwarzman", :link=>"/economics/econ-252-08/lecture-20"}, {:title=>"Forwards and Futures", :link=>"/economics/econ-252-08/lecture-21"}, {:title=>"Stock Index, Oil and Other Futures Markets", :link=>"/economics/econ-252-08/lecture-22"}, {:title=>"Options Markets", :link=>"/economics/econ-252-08/lecture-23"}, {:title=>"Making It Work for Real People: The Democratization of Finance", :link=>"/economics/econ-252-08/lecture-24"}, {:title=>"Okun Lecture: Learning from and Responding to Financial Crisis, Part I (Guest Lecture by Lawrence Summers)", :link=>"/economics/econ-252-08/lecture-25"}, {:title=>"Okun Lecture: Learning from and Responding to Financial Crisis, Part II (Guest Lecture by Lawrence Summers)", :link=>"/economics/econ-252-08/lecture-26"}, {:title=>"Final Exam", :link=>"/economics/econ-252-08/exam-3"}], :time=>58}, ]


class DayAvailability
	def initialize (dayOfWeek, availableHours, totalHours)
		@dayOfWeek = dayOfWeek
		@availableHours = availableHours
		@totalHours = totalHours
	end

	attr_accessor :dayOfWeek
	attr_accessor :availableHours
	attr_accessor :totalHours
end

class WeekAvailability
	def initialize
		@Monday = []
		@Tuesday = []
		@Wednesday = []
		@Thursday = []
		@Friday = []
		@Saturday = []
		@Sunday = []
	end

	
	attr_accessor :Monday
	attr_accessor :Tuesday
	attr_accessor :Wednesday
	attr_accessor :Thursday
	attr_accessor :Friday
	attr_accessor :Saturday
	attr_accessor :Sunday

	def totalHours
		@Monday.totalHours + @Tuesday.totalHours + @Wednesday.totalHours + @Thursday.totalHours + @Friday.totalHours
		+ @Saturday.totalHours + @Sunday.totalHours
	end

	def weekArray
		[@Sunday.availableHours, @Monday.availableHours, @Tuesday.availableHours, @Wednesday.availableHours,
		 @Thursday.availableHours, @Friday.availableHours, @Saturday.availableHours]
	end

end


class WeekSchedule
	def initialize(startDate, weekArray, hoursPerWeek)

		@dow = startDate.wday #day of week of start date
		@startDate = startDate
		@weekArray = weekArray#week Availability array
		@hoursPerWeek = hoursPerWeek
	end

	def createSchedule
		hoursLocal = @hoursPerWeek

		oneWeekSchedule = []
		for index in 0..6 
			dayindex = (index + @dow) % 7 #reindex to start at the start date specified by user
			day = @weekArray[dayindex]
			day.each_with_index do |hour, hourindex|
				# puts hour
				if hoursLocal <= 0
					break
				end

				if hour == true
					hoursLocal-=1 
					dayoffset = (dayindex - @dow) % 7
					oneWeekSchedule.push([hourindex, dayoffset])
				end
			end
		end

		oneWeekSchedule

	end
end

class TotalSchedule 

	def initialize(courses, courseindices, hoursPerWeek)
		courseindices.each_with_index {|courseindex, i| courseindices[i] = courseindex.to_i}

		@courseindices = courseindices
		@totalHours = courseindices.inject(0) {|result, index| result + courses[index][:time]}
		@courses = courses
		@hoursPerWeek = hoursPerWeek
		@totalAvailabilityArray = []
		@courseArray = []
	end




	def createAvailabilityArray(oneWeekSchedule)
			@totalAvailabilityArray = []
			localTotalHours = @totalHours
			weeks=(localTotalHours+@hoursPerWeek-1)/@hoursPerWeek #ceiling, round up weeks
			(0...weeks).each do |week|
				oneWeekSchedule.each do |period|
					#schedule the right amount of hours
					if localTotalHours <= 0
						break
					end

					@totalAvailabilityArray.push([period[0], period[1]+7*week])

					# puts localTotalHours.to_ss

					localTotalHours -= 1
				end
			end
		@totalAvailabilityArray
	end

	def createSingleCourse(hash)
		numLectures = hash[:sessions].length
		singleCourseArr = Array.new(numLectures)

		singleCourseArr.each_with_index do |lecture, lectureNum|
			singleCourseArr[lectureNum] = ClassPeriod.new(hash[:title], hash[:sessions][lectureNum][:title], lectureNum, hash[:sessions][lectureNum][:link])
		end

		singleCourseArr

	end

	def createCourseArrNoSH
		#Array of lectures with lectures not in the correct order (each element in the array is a full
		#list of lectures for each courese)
		courseArrUnordered = []
		@courseindices.each do |index|
			# puts "Index:" +  index.to_s
			singleCourseSched = createSingleCourse(@courses[index])
			# puts "List of courses: " + courses[index].to_s
			# puts "Single Schedule: " + singleCourseSched.to_s
			courseArrUnordered.push(singleCourseSched)
			#puts courseArrUnordered.to_s
		end

		#Array of lectures with lectures in the correct order (alternating lectures between each different course)
		blankArr= Array.new(MAXNUMLECTURES)

		courseArrOrdered = []

		courseArrUnordered.inject(blankArr) do |result, sched|
			courseArrOrdered = result.zip(sched)
			# puts courseArrOrdered
		end

		courseArrOrdered = courseArrOrdered.flatten

		courseArrOrdered.delete(nil)

		courseArrOrdered

	end


	def createCourseArray 
		#course array no study halls 
		courseArrayNoSH = createCourseArrNoSH

		#this one will now include the study halls
		@courseArray = Array.new(@totalHours)
		lectureNum = 0
		coursetitle = ''
		@courseArray.each_with_index do |session, index|
			if index.even?			
				# courseArray[index] = {title: practicehash[:title], lectureinfo: practicehash[:sessions][lectureNum]}
				# puts session


				@courseArray[index] = courseArrayNoSH[lectureNum]
				
				#for study halls 
				coursetitle = courseArrayNoSH[lectureNum].coursetitle

				lectureNum += 1

			else
				studyhall = StudyHall.new(coursetitle)
				# puts studyhall
				@courseArray[index] = studyhall
			end
		end
		@courseArray
	end

	def createScheduleArray

		@courseArray.each_with_index do |course, index|
			course.hourOffset = @totalAvailabilityArray[index][0]
			course.dayOffset = @totalAvailabilityArray[index][1]
		end

		@courseArray 
	end

	attr_accessor :totalAvailabilityArray
	attr_accessor :totalHours
	attr_accessor :courseArray

end