gistfile1.rb

class Teetime < ActiveRecord::Base
    validates :user, format: { with: /\w/, message: "can only contains letters or numbers"}, uniqueness: true
    validates :date, presence: true
    validates :time, presence: true
    validates :club_id, inclusion: {in: Club.all.map { |club| club.id }, message: "%{value} is not a valid club"}
    belongs_to :club 

    def self.available_on(date, club)
        # date comes in the format mm/dd/yyy
        # club comes in the format "clubname"
        club_id = Club.where(name: club).first.id

        spdate = date.split "/"
        day, month, year = spdate[1], spdate[0], spdate[2]

        possible_time = (9..16).map do |h|
            [0, 20, 40].map do |m|
                Time.new(year, month, day, h, m)
            end
        end

        taken_time = self.where(date: date, club_id: club_id).map do |teetimes|
            sptime = teetimes.time.split(":")
            hour, minutes = sptime[0], sptime[1]
            Time.new(year, month, day, hour, minutes)
        end

        possible_time.flatten.delete_if do |t|
             taken_time.flatten.include? t
        end
    end
end