global_cohort.rb

require 'date'

class GlobalCohort
  attr_reader :local_cohorts, :name, :p0_start_date

  def initialize(name, p0_start_date=nil)
    @local_cohorts = []
    @students = []
    @name = name
    @p0_start_date = p0_start_date.nil? ? Date.today : p0_start_date
  end

  def students
    # returns student objects, not just names
    total_students = []
    local_cohorts.each do |cohort|
      total_students << cohort.students
    end
    total_students.flatten
  end

  def student_names_list
    total_students = []
    local_cohorts.each do |cohort|
      total_students << cohort.students.map{|student| student.student_name}
    end
    total_students.flatten
  end

  def email_list
    students.map{|student| student.email}
  end

  def num_of_students
    students.length
  end

  def add_local_cohort(city)
    @local_cohorts << city
  end

  def phases
    {phase0: {start: p0_start_date, finish: (p0_start_date + 62)},
     phase1: {start: (p0_start_date + 63), finish: (p0_start_date + 76)},
     phase2: {start: (p0_start_date + 77), finish: (p0_start_date + 90)},
     phase3: {start: (p0_start_date + 91), finish: (p0_start_date + 111)},
     phase4: {start: (p0_start_date + 112), finish: (p0_start_date + 116)}}
  end

  def currently_in_phase
    phases.each do |phase, dates|
      if phases[phase][:start] <= Date.today && phases[phase][:finish] >= Date.today
        return phase.to_s
      end
    end
  end

  def phases_schedule
    puts "Phase 0: #{phases[:phase0][:start]} to #{phases[:phase0][:finish]}"
    puts "Phase 1: #{phases[:phase1][:start]} to #{phases[:phase1][:finish]}"
    puts "Phase 2: #{phases[:phase2][:start]} to #{phases[:phase2][:finish]}"
    puts "Phase 3: #{phases[:phase3][:start]} to #{phases[:phase3][:finish]}"
    puts "Phase 4: #{phases[:phase4][:start]} to #{phases[:phase4][:finish]}"
    puts "Graduation: #{phases[:phase4][:finish] + 1}"
  end

  def immersive_start_date
    phases[:phase1][:start].strftime("%v")
  end

  def graduation_date
    phases[:phase4][:finish].strftime("%v")
  end

  def graduated?
    phases[:phase4][:finish] < Date.today
  end
end