Assignment 2

# Assignment 2 of 40 Days of Ruby
# Author: SirBee
# Date: 2013-12-31

puts "\nAssignment 2"
puts "SirBee forged this in a JRuby Enviroment (1.7.9)"
puts "Runtime begins at: " + Time.new.to_s
puts "At the task entry prompt you may enter any of these commands"

puts "\n-s:\tSave List"
puts "-e:\tEdit Item"
puts "-d:\tDelete Item"
puts "-q:\tQuit"

tasks = []
input = ""

if !File.exist?('tasks.txt') # if tasks file not found, create one!
    puts "tasks.txt not found! Forging File..."
    File.new('tasks.txt', 'w') #create file
end

tasks = IO.readlines('tasks.txt') # readlines is a function in the IO class that feeds each new line in a file into a container

loop do

    if tasks.size == 0 # if task container is empty, tell user
        puts "\nYou have no tasks assigned! Please enter Task!"
    else
        puts "\n"
        tasks.each_with_index { |task, index| puts (index+1).to_s + ": " + task.to_s } # print task index and task to console
        puts "\n"
        puts "Please Enter Task."
    end

    input = gets.chomp # enter task

    # check for option commands in input
    if input == "-q"
        break
    elsif input == "-d"
        puts "Which numbered task would you like to delete?"
        tasks.delete_at(gets.chomp.to_i - 1) # delete task at index
        puts "Task deleted"
    elsif input == "-e"
        puts "Which numbered task would you like to edit?"
        i = (gets.chomp.to_i - 1) # integer variable contains task index
        puts "Please Enter Task."
        tasks[i] = gets.chomp # overwrite that business!
    elsif input == "-s" # IO Save Option
        File.new('tasks.txt', 'w') # if tasks.txt is deleted during runtime, simply create new
        File.open('tasks.txt', 'w') do |file| # for each task in tasks, add new line
            tasks.each { |task| file.puts(task) }
        end
        puts "Tasks Saved!"
    else
        tasks << input # feed string into array
    end

end