todo.csv

Move with Lil to the black mountain hills of Dakota
Lose Lil to Danny
Get hit in the eye by Danny
Walk into town seeking revenge
Book room at local saloon
Check into room and read Gideon's bible
Drink too much gin
Overhear Lil and Danny in neighboring room
Burst into neighboring room and declare a showdown
Get shot by Danny and collapse in corner
Visit doctor
Return to room and read Gideon's bible
Sing along! D'do d'do d'do do do d'do d'do d'do

todo.rb

# What classes do you need?

# Remember, there are four high-level responsibilities, each of which have multiple sub-responsibilities:
# 1. Gathering user input and taking the appropriate action (controller) - waiter(front), task
# 2. Displaying information to the user (view) - interface
# 3. Reading and writing from the todo.txt file (model) - chef(background) + list
# 4. Manipulating the in-memory objects that model a real-life TODO list (domain-specific model)
  
# Note that (4) is where the essence of your application lives.
# Pretty much every application in the universe has some version of responsibilities (1), (2), and (3)

require 'csv'

class Task  # Controller
  attr_accessor :id, :text, :completed
  def initialize(option = {})
    @id = option.fetch(:id){nil}
    @text = option.fetch(:text)
    @completed = option.fetch(:completed){false}
  end
end

class List  # Model
  attr_reader :file, :list

  def initialize(file)
    @file = file
    @list = nil
  end

  def parse_file  # initial_scan // scan from start 
    return @list if @list

    @list = []
    CSV.foreach(@file) { |row|
      if row.size == 3  # Check if there is 3 row 
        if row[2] == "true"
          row[2] = true  # Completed
        else
          row[2] = false # Not completed
        end
        row = Task.new(id: @list.size, text: row[1], completed: row[2])
        add(row)
      else
        row = Task.new(id: @list.size, text: row[0])
        add(row)
      end
    }
  end  # END of Parse_file

  def display  #View
    puts "There are #{@list.size} tasks in the file '#{@file}'."
    @list.each_with_index { |task, index|
      if (index+1) > 9  # More than 10 and above 
        mark = task.completed ? "[X]" : "[ ]"
      else 
        mark = task.completed ? " [X]" : " [ ]"
      end
     # puts "##{task.id+1}. #{'[X]' if task.completed} #{task.text}"
     puts "##{task.id+1}. #{mark} #{task.text}"
    }
    puts ""
  end

  def add(task)
    if task.id == nil
      task.id = @list.size
    end
    @list << task
  end

  def update_list(list)
    list.each_with_index { |row, index|
      row.id = index
    }
  end

  def delete(task_number)
    @list.delete_at(task_number-1)
    update_list(@list)
  end

  def complete(task_number)
    @list[task_number-1].completed = true
    update_list(@list)
  end

  def save
    CSV.open(@file, "w+") { |csv|
      @list.each { |task|
        csv << [task.id, task.text, task.completed]
      }
    } # END of CSVs
  end

end # END of Class

class Driver 
  def start!
  if ARGV.any?
    # puts "The command line arguments are:"
    first_arg, *the_rest = ARGV
    # p first_arg
    if the_rest.empty?
    else
      the_rest =  the_rest.join(" ")
      # p the_rest
    end
  end

  list = List.new('todo.csv')
  list.parse_file
  list.save

    case first_arg
      when "list"
        clear_screen!
        move_to_home!
        list.display  # Display the text      
      when "add"
        new_task = Task.new(text: the_rest)
        list.add(new_task)
        list.save
        clear_screen!
        move_to_home!
        puts "Appended '#{the_rest}'' to your TODO list..."
      when "delete"
        clear_screen!
        move_to_home!
        if ARGV[1].nil?
          puts "\nInvalid input. Need Help ??\nType : ruby testing.rb help"
        else 
          the_rest = the_rest.to_i
          list.delete(the_rest)
          list.save
          puts "Deleted '#{the_rest}' from your TODO list..."  
        end
        
      when "complete"
        clear_screen!
        move_to_home!
        if ARGV[1].nil?
          puts "\nInvalid input. Need Help ??\nType : ruby testing.rb help"
        else
          the_rest = the_rest.to_i
          list.complete(the_rest)
          list.save
          puts "Have mark '#{the_rest}' completed from your TODO list..." 
        end
       when "help"
        clear_screen!
        move_to_home!
        puts "ruby testing.rb (add,delete,complete,list) value/text"
        puts "EG. 1:  ruby testing.rb add Hello"
        puts "EG. 2:  ruby testing.rb delete 1, [NOTE: 1 means the position!]"
        puts "EG. 3:  ruby testing.rb complete 2, [NOTE: 2 means the position!]"
        puts "EG. 4:  ruby testing.rb list"
      else 
        puts "Need Help ??\nType : ruby testing.rb help"
    end

  end  # END of start Method

  private 
    # Clear the screen
    def clear_screen!
      print "\e[2J"
    end

    # Moves cursor to the top left of the terminal
    def move_to_home!
      print "\e[H"
    end

end  # ENDof Driver class

driver = Driver.new
driver.start!

todo_edited.csv