todo list revision 1

todo1.rb

#questions :
#1. how to check if file exists?  Better way than opening with 'append' (+)?
#2. how to write to middle of file?  does the entire file need to be re-written from the contents in memory?

class TodoList

  def initialize()
    @file_name = "todo_file.txt"
    @file = File.new(@file_name,'r+')
    @todo_list = {}
    @count = @file.lines.count
    @delim = " || "
    read_file
  end

  def add_to_list(task)
    @todo_list[@count] = task
    @count += 1
    write_to_file
  end

  def read_file
    puts "reading file"
    @file.each do |i|
      split_line = i.split(@delim)
      new_task = Task.new(split_line[1],split_line[2],split_line[3])
      p new_task
    end
  end

  def write_to_file
    0.upto(@count) do |i|
      puts "hello : #{@todo_list.inspect}"
      @file.write("#{@count}#{@delim}#{@todo_list[i].task_name}#{@delim}#{@todo_list[i].creation_date}#{@delim}#{@todo_list[i].completed.to_s}\n")
    end
  end

end

class Task

  attr_accessor :task_name, :creation_date, :completed, :task_num

  def initialize(task_name, creation_date = Time.now, completed = false)
    @task_name = task_name
    @creation_date = creation_date
    @completed = completed
  end

end

class Main

  def initialize
    @command = ARGV[0]
    @task_name = ARGV[1..100].join(' ')
    @valid_commands = ['add','prepend','list','delete','complete']
  end

  def parse_command
    unless @valid_commands.include?(@command)
      return puts "invalid command"
    end
    case @command
    when "add"
      new_task = Task.new(@task_name)
      todo_list = TodoList.new
      todo_list.add_to_list(new_task)
    when "prepend"
      #something
    when "list"
      #list
    when "delete"
      #delete
    when "complete"
      #complete
    end
  end

end

new_main = Main.new
new_main.parse_command