# Ruby Editor Program, a basic CLI text editor
# Copyright (C) 2010 Michael Lenox

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.



require 'fileutils'
#Class with the cls "clear screen" method".
class CLS
 def cls
  puts("\n" * 10000)
 end
end

class Editor<CLS
 def edit
  cls
  print"Welcome to Ruby Editor! "  
  sleep 3
  cls
  print"Read, Write, Rename, Delete, or Edit (r, w, n, d, e) " 
   answer = gets.chomp
 if answer != "r"  and answer != "w" and answer != "n" and answer != "d" and answer != "e" then     #code to eliminate any input other than "r", "w", "n", "d", or "e".
  print"Please enter a correct letter..."
  sleep 2
  e = Editor.new
  e.edit

end

# main code 

 if answer == "r" then                                                                              #conditional logic. if answer == "r" then the following code executes
  cls
  print"Enter file to read. "
   answer1 = gets.chomp                                                                             #gets input from keyboard and saves it in variable "answer1"
  file = File.open("#{answer1}", "r+")                                                              #opens file with filename equal to variable "answer1"
   read = file.gets                                                                                 #reads contents of file
  cls                                                                                               #clears screen
 puts read                                                                                          #puts text from file to screen
 file.close                                                                                         #closes the file
 puts"\n" 
print"Press 'enter' to restart! "
 answer = gets.chomp                                 
 e = Editor.new
 e.edit

else          

 if answer == "w" then                                                                              #conditional logic. if answer == "w" then the following code executes
 cls
 print"Please type below, then press enter.\n "       
   input = gets.chomp                                                                               #gets input from keyboard and saves it in variable "input"
   cls
   puts "Save as? " 
   save = gets.chomp                                                                                #gets input from keyboard and saves it as variable "save"
    file1 = FileUtils.touch"#{save}"                                                                #creates new file with the name stored in variable "save"
  file1 = File.new("#{save}", "r+")                                                                 #opens the file for write
  file1.puts input                                                                                  #saves the text from variable "input"
  file1.close                                                                                       #closes the file
  cls 
print"File saved, press 'enter' to restart! "
 answer = gets.chomp                                                                                #gets the user's input
e = Editor.new                                        
  e.edit                                                                                            #restarts program

else
 
 if answer == "n" then                                                                              #conditional logic. if answer == "w" then the following code executes
  cls
  print"Enter file to rename. "
   ren = gets.chomp                                                                                 #gets input from keyboard and saves it inariable "ren"
   file2 = File.open("#{ren}", "r+")
   read = file2.gets                                                                                #reads opened file
   File.delete ("#{ren}")
   cls                                                                                              #clears screen
   print"Enter new filename "
   answer2 = gets.chomp                                                                             #gets the user's input and saves it in variable "answer2"
   file2 = FileUtils.touch"#{answer2}"                                                              #creates new file with the name stored in variable "answer2"
   file2 = File.new("#{answer2}", "r+")                                                             #opens the file for write
   file2.puts read                                                                                  #saves the text from variable "read"
   file2.close                                                                                      #closes file
   cls
   print"File renamed, press enter to restart "
   answer = gets.chomp                                                                              #waits for "enter" to be pressed
   e = Editor.new
   e.edit                                                                                           #restarts program

 else
   
 if answer == "d" then                                                                              #conditional logic. if answer == "d" then the following code executes
  cls
   print"Enter file to delete "
    del = gets.chomp                                                                                #gets the user's input and saves it in variable "del"
    file3 = File.open("#{del}", "r+")                                                               #opens the file for write
    File.delete("#{del}")                                                                           #file deleted
    cls
    print"'#{del} '"  "deleted, press enter to restart "
    answer = gets.chomp                                                                             #waits for "enter" to be pressed
   e = Editor.new
   e.edit                                                                                           #restarts the program
   
else
 
if answer == "e" then                                                                               #conditional logic. if answer == "e" then the following code executes
 cls
 print"Enter file to Edit. "
  edit = gets.chomp 
  file4 = File.open("#{edit}", "r+")                                                                #opens the file for "write"
  cls
    puts"Edit file, then press enter to save "
  File.delete ("#{edit}")                                                                           #file deleted
  edit1 = gets.chomp                                                                                #gets the user's input and saves it in variable "edit1"                   
  file4 = FileUtils.touch"#{edit}"                                                                  #creates new file with from original name stored in variable "edit"
  file4 = File.new("#{edit}", "r+")                                                                 #opens the file for write
  file4.puts edit1
  file4.close                                                                                       #closes the file
  cls
print"File saved, press 'enter' to restart! "
 answer = gets.chomp                                                                                #waits for "enter" to be pressed
 e = Editor.new
 e.edit                                                                                             #restarts program
      end
     end
    end
   end
  end
 end
end
                                                                                                    #creates the object
e = Editor.new
e.edit