oldpullEvent = os.pullEvent
os.pullEvent = os.pullEventRaw

-- Cannon OS by PaymentOption --
VERSION = 1.85
--------------------------------

rednet.open("top")
rednet.open("bottom")
rednet.open("back")
rednet.open("front")
rednet.open("right")
rednet.open("left")

--[[ Notes:
User information like passwords are located in the User/<computerID>/.info.
E-Mails are stored in the /Mail Directory.
E-Mail preferences are stored in /Mail/.prefs.

All printing functions like PrintMenu and PrintMainScreen do not clear the screen first; you must clear it before using them.
--]]


-- VARIABLES --

-- Update and Service Variables --
nServerID = 12 -- Update and key check server ID
----------------------------------

-- Screen Variables --
screenWidth, screenHeight = term.getSize()
selection = 1

sMenuState = "main"
----------------------

-- Account Variables --
sUserName = ""
sPassword = ""

bNewUser = true
bLogin = true

bAdmin = true -- Switch to false to disable the following features: CraftOS, Computer, Email, Account Manipulation
-----------------------

-- Authenticity Variables --
sLocalKey = ""
bIsAuthentic = true -- If the key entered by the user upon installation is correct, then this should be true
----------------------------

-- Mail --
if(fs.isDir("Mail")) then nMail = #(fs.list("Mail"))-1
else nMailCount = 0 end
----------
---------------

-- Software Validation --
function checkKey(sKey)
rednet.send(nServerID, "CHECKMYKEY")
rednet.send(nServerID, tostring(sKey))

sender, message = rednet.receive(1)

if sender == nServerID then
if message ~= "authentic" then bAuthentic = false; return false
else bAuthentic = true; return true end
end
end

function getKey()
if fs.exists(".key") then return end
if bIsAuthentic == true then return end -- To avoid embarassing double authentication!

clear()
printMainScreen()
sleep(2)

clear()
printBorder()

cPrint(3, "Welcome!")
cPrint(5, "You're about to install:")
cPrint(6, "Cannon OS V:"..VERSION.."!")
cPrint(7, " The installation wizard will walk you")
cPrint(8, " through product validation to installation.")
cPrint(10, "Before you continue, make sure that you have")
cPrint(11, " the product key given by your distributor.")

cPrint(15, "[ Continue ]")
while true do
event, key = os.pullEvent("key")

if key == 28 then break end
end

clear()
printBorder()

rPrint(17, "Cannon OS Version: "..VERSION.."*")
rPrint(16, "Software: LOCKED*")

cPrint(8, "Please enter your product key here:")
term.setCursorPos(15, 9); write("Key: ")
local sProductKey = newRead()

if checkKey(sProductKey) then
clear()
printBorder()

cPrint(9, "Congradulations,")
cPrint(10, "Your software has successfully been")
cPrint(11, "VALIDATED!")
sleep(3)

local file = fs.open(".key", "w")
file.writeLine(sProductKey)
file.close()
bIsAuthentic = true
else
clear()
printBorder()

cPrint(8, "I'm sorry, but the key")
cPrint(9, "entered doesn't seem to be valid.")
sleep(3)
os.shutdown()
end
end
-------------------------


-- Helper Functions --
function cPrint(height, string)
local xPos = screenWidth/2 - string.len(string)/2
term.setCursorPos(xPos, height); term.write(string)
end

function rPrint(height, string)
local xPos = screenWidth - string.len(string)
term.setCursorPos(xPos, height); term.write(string)
end

function clear() term.clear(); term.setCursorPos(1,1) end

function printBorder()
write(" "..string.rep("*", screenWidth-2).."n")
for i=1, screenHeight-2 do
write(" *"..string.rep(" ", screenWidth-4).."*n")
end
write(" "..string.rep("*", screenWidth-2))
end

function customWrite(height, string)
term.setCursorPos(3, height)
term.write(string)
end

function clearCenter()
cPrint(2, "* "..sUserName.." *")
cPrint(3, "*"..string.rep("*", string.len(sUserName)+2).."*")
rPrint(17, "Cannon OS Version: "..VERSION.. "*")

local line = 4
term.setCursorPos(34, 3); term.write("  ") -- Remove the very top part of the cannon logo
repeat
term.setCursorPos(1, line); term.clearLine()
line = line+1
until line == 12

line = 4
term.setCursorPos(1, 4)

repeat
write(" *"..string.rep(" ", screenWidth-4).."*n")
line = line+1
until line == 12
end

function printContainer()
term.setCursorPos(4, 5); term.write(string.rep("*", screenWidth-6))
local y = 6
for i=1, screenHeight - 13 do
term.setCursorPos(4, y); term.write("*"..string.rep(" ", screenWidth-8).."*")
y = y+1
end
term.setCursorPos(4, 11); term.write(string.rep("*", screenWidth-6))
end

-- Perfecting the pullEvent backspace attempt 1! --

function newRead( _charLimit, _ReplaceChar) -- The filter can either be a 1, 0, or nil. 1 is Numbers only, 0 is letters only, and nil is both
local sMessage = ""
term.setCursorBlink(true)
local originalCursorX, originalCursorY = term.getCursorPos()

while true do
local cursorX, cursorY = term.getCursorPos()
local event, p1 = os.pullEvent()

if _charLimit ~= nil then
if string.len(sMessage) == _charLimit then term.setCursorBlink(false); return sMessage end
end

if event == "char" then sMessage = sMessage..p1
--[[elseif event == "key" then -- The escape key has keyID 1 so: 0 = keyID: 11, 1 = keyID: 2, 2 = keyID : 3 etc etc....
if p1 == 11 or p1 == 2 or p1 == 3 or p1 == 4 or p1 == 5 or p1 == 6 or p1 == 7 or p1 == 8 or p1 == 9 or p1 == 10 then
--        0       1          2          3          4          5          6          7          8           9
sMessage = sMessage..(p1-1)
end--]]
end

if event == "key" and p1 == 28 then term.setCursorBlink(false); return sMessage end-- Enter key; end the loop and let's see the string

if event == "key" and p1 == 14 then -- Backspace...
sMessage = string.sub(sMessage, 1, string.len(sMessage)-1)
-- Set our message to the substring of the first charcter
-- To the length of the message minus 1 to achieve one less letter.

term.setCursorPos(originalCursorX, cursorY)
term.write(sMessage.." ") -- Adding this empty space clears the removed character from the line, but may pose future issues
end

term.setCursorPos(originalCursorX, cursorY); term.write(string.rep(" ", string.len(sMessage)))
-- Clear the previous line just in case we get a new line
-- Now write the message on the new line
if _ReplaceChar ~= nil then
term.setCursorPos(originalCursorX, cursorY)
term.write(string.rep( _ReplaceChar, string.len(sMessage) ))
else
term.setCursorPos(originalCursorX, cursorY)
term.write(sMessage)
end
end
end
----------------------


-- System Functions --
function checkInstalltion()
if fs.exists("SYSTEM/.installed") then return true
else return false end
end

function runShell() shell.run("/rom/programs/shell") end

function getVersion() return VERSION end

function checkVersion()
local sCommand = "get"
if sCommand == "get" then
local sCode = "c17Hgq1A"
local sPath = ".tempVersion"

while true do
local response = http.get(
"http://pastebin.com/raw.php?i="..textutils.urlEncode( sCode )
)

if response then
local sResponse = response.readAll()
response.close()
if tonumber(sResponse) > VERSION then return true
else return false end
break
else return false end
end
end
end

function updateSelf()
local sCommand = "get"
if sCommand == "get" then
local sCode = "6a92bGGZ"
local sFile = "startup"
local sPath = shell.resolve( sFile )

while true do
local response = http.get(
"http://pastebin.com/raw.php?i="..textutils.urlEncode( sCode )
)

if response then
local sResponse = response.readAll()
response.close()

local file = fs.open( sPath, "w" )
file.write( sResponse )
file.close()
break
else return false end
end
end
end

function checkDirs()
if not fs.isDir("Mail") then shell.run("rom/programs/mkdir", "Mail"); nMailCount = (#(fs.list("/Mail"))) end
if not fs.isDir("User") then shell.run("rom/programs/mkdir", "User"); shell.run("rom/programs/mkdir", "User/"..tostring(os.getComputerID())) end
if not fs.isDir("User/"..tostring(os.getComputerID()).."/Projects") then shell.run("rom/programs/mkdir", "User/"..tostring(os.getComputerID()).."/Projects") end
if not fs.isDir("User/"..tostring(os.getComputerID()).."/Desktop") then shell.run("rom/programs/mkdir", "User/"..tostring(os.getComputerID()).."/Desktop") end
if not fs.isDir("User/"..tostring(os.getComputerID()).."/Desktop/Shortcuts") then shell.run("rom/programs/mkdir", "User/"..tostring(os.getComputerID()).."/Desktop/Shortcuts") end
if not fs.isDir("User/"..tostring(os.getComputerID()).."/Files") then shell.run("rom/programs/mkdir", "User/"..tostring(os.getComputerID()).."/Files") end

if not fs.isDir("Mail/Contacts") then shell.run("rom/programs/mkdir", "Mail/Contacts") end
if not fs.isDir("SYSTEM") then shell.run("rom/programs/mkdir", "SYSTEM") end
if not fs.exists("SYSTEM/Version") then
local file = fs.open("SYSTEM/Version", "w"); file.writeLine(tostring(VERSION))
file.close()
end
file = fs.open("SYSTEM/.installed", "w")
file.writeLine("TRUE")
file.close()
end


function checkUserInformation()
if fs.exists("User/"..os.getComputerID().."/.info") then
local file = fs.open("User/"..os.getComputerID().."/.info", "r")
sUserName = file.readLine()
sPassword = file.readLine()
file.close()
bNewUser = false
else
bNewUser = true
end
end

function getUserInformation()
if bNewUser == false then return nil -- This is to prevent accidental account resets
else
printNewUserScreen()
end
end

function handleLogin()
if fs.exists(".login") then
file = fs.open(".login", "r")
fileContents = file.readAll()
file.close()
fs.delete(".login")
bLogin = false

if fileContents == "false" then return end
end

if bNewUser == false then
printMainScreen(); sleep(2)
clear()

printBorder()
cPrint(4, "***************************")
cPrint(5, "* Identification required *")
cPrint(6, "***************************")

cPrint(8, "Username: ")
cPrint(9, "Password: ")
rPrint(17, "Cannon OS Version: "..VERSION.."*")
rPrint(16, "LOCKED*")

term.setCursorPos(screenWidth/2 - string.len("Username: ")/2 + string.len("Username: "), 8)
local tempUserName = newRead(14, nil)
term.setCursorPos(screenWidth/2 - string.len("Password: ")/2 + string.len("Password: "), 9)
local tempPassword = newRead(14, "*")

if tempUserName == sUserName and tempPassword == sPassword then
rPrint(16, "UNLOCKED*")
cPrint(11, "**********************")
cPrint(12, "* Successfull login! *")
cPrint(13, "**********************")
sleep(2)
return
else
cPrint(11, "************************")
cPrint(12, "* Unsuccessfull login! *")
cPrint(13, "************************")
sleep(2)
os.shutdown()
end
end
end

function printInstallation()
if checkInstalltion() then return end
printBorder()
cPrint(4, "*************************")
cPrint(5, "* Installation Progress *")
cPrint(6, "*************************")

local progressPosition = 6; -- X position to represent where the progress bars will be drawn
local nProgressPercent = 0;

cPrint(8, " * "..string.rep("*", screenWidth - 6))
cPrint(9, " * *"..string.rep(" ", screenWidth - 8).."*")
cPrint(10, " * "..string.rep("*", screenWidth - 6))

cPrint(12, "********")
cPrint(13, "* "..string.rep(" ", string.len("100%")).." *")
cPrint(14, "********")

for i=1, 80 do
if i%2 == 0 then
term.setCursorPos(progressPosition, 9); term.write("|")
progressPosition = progressPosition+1
sleep(0.2)
end
nProgressPercent = nProgressPercent+1
if nProgressPercent == 75 then nProgressPercent = 95 end
if nProgressPercent == 95 then sleep(1.1) end
term.setCursorPos(24, 13); term.write(nProgressPercent)
end
checkDirs()
end

-- Background Processes --
function checkMail(sender, message)
if string.find(message, "CANNONMAILMESSAGE") then
local file = fs.open("Mail/Unread"..nMailCount, "w")
message =  string.gsub(message, "CANNONMAILMESSAGE", "")
file.write(tostring(sender).."n"..tostring(message))
file.close()

nMailCount = nMailCount+1
end
end
--------------------------
----------------------


-- Menues and other screens --
function printNewUserScreen()
if bNewUser == false then return end
local bPasswordsMatch = false

printBorder()
printWelcome()
sleep(3)
clear()

printBorder()
cPrint(2, "* New User *")
cPrint(3, "************")

rPrint(17, "Cannon OS Version: "..VERSION.."*")

cPrint(6, "Username: ")
cPrint(7, "Password: ")
cPrint(8, " Confirm: ")
cPrint(12, "************************")
cPrint(13, "*Password not optional!*")
cPrint(14, "************************")

term.setCursorPos(screenWidth/2-string.len("Username: ")/2+string.len("Username: "), 6)
sUserName = newRead(14, nil)
if string.len(sUserName) > 14 then
cPrint(10, "Username is too long!"); sleep(1.3)
term.setCursorPos(1, 10); term.clearLine() -- Clear the line 10
term.write(" *"..string.rep(" ", screenWidth-4).."*")

term.setCursorPos(1, 6); term.clearLine() -- Clear the line
term.write(" *"..string.rep(" ", screenWidth-4).."*")
cPrint(6, "Username: ")
term.setCursorPos(screenWidth/2-string.len("Username: ")/2+string.len("Username: "), 6)
sUserName = newRead(14, nil)
end
while bPasswordsMatch == false do
term.setCursorPos(screenWidth/2-string.len("Password: ")/2+string.len("Password: "), 7)
sPassword = newRead(14, "*")
if sPassword ~= nil and sPassword ~= "" then
term.setCursorPos(screenWidth/2-string.len(" Confirm: ")/2+string.len(" Confirm: "), 8)
local sConfirm = newRead(14, "*")
if sConfirm ~= sPassword then
cPrint(10, "Passwords do not match!"); sleep(1.3)
term.setCursorPos(1, 10); term.clearLine() -- Clear the line 10
term.write(" *"..string.rep(" ", screenWidth-4).."*")

term.setCursorPos(1, 7); term.clearLine() -- Clear the line 7
term.write(" *"..string.rep(" ", screenWidth-4).."*")
cPrint(7, "Password: ")

term.setCursorPos(1, 8); term.clearLine() -- Clear the line 8
term.write(" *"..string.rep(" ", screenWidth-4).."*")
cPrint(8, " Confirm: ")
else sPassword = sConfirm; bPasswordsMatch = true end
else sPassword = ""
end
end

local file = fs.open("User/"..os.getComputerID().."/.info", "w")
file.writeLine(tostring(sUserName))
if sPassword == "" then file.writeLine("N/A")
else  file.writeLine(tostring(sPassword))
end
file.close()

cPrint(10, "Account '"..sUserName.. "' succesfully created!"); sleep(1.3)
end

function printWelcome()
customWrite(3, "__          __   _                           ")
customWrite(4, "         / /  | |                          ")
customWrite(5, "    /  / /___| | ___  ___  _ __ ___   ___ ")
customWrite(6, "   /  / // _  |/ __|/ _ | '_ ' _  / _ ")
customWrite(7, "     /  /|  __/ | (__| (_) | | | | | |  __/")
customWrite(8, "    /  /  ___|_|___|___/|_| |_| |_|___|")
customWrite(9, "          _    _               ")
customWrite(10, "         | |  | |              ")
customWrite(11, "         | |  | |___  ___ _ __ ")
customWrite(12, "         | |  | / __|/ _  '__|")
customWrite(13, "         | |__| __   __/ |   ")
customWrite(14, "          ____/|___/___|_|   ")

rPrint(17, "Cannon OS Version: "..VERSION.."*")
end

function printMainScreen()
printBorder()
customWrite(2, "                          ________")
customWrite(3, "                         | ______o|")
customWrite(4, "         _______________ ||__---_||")
customWrite(5, "        |  ___________  || ______ |")
customWrite(6, "        | |           | |||______||")
customWrite(7, "        | | Cannon OS | ||--------|")
customWrite(8, "        | |    By     | ||      O |")
customWrite(9, "        | |  Payment  | ||      | |")
customWrite(10, "        | '-----------' ||      | |")
customWrite(11, "        |_____________-_||      | |")
customWrite(12, "          __/_________  |::::::::|")
customWrite(13, "         ________________'-.__")
customWrite(14, "        /:::::::::':::':: .---.")
customWrite(15, "       /::======::: .:.::: _)   ")
customWrite(16, '       """"""""""""""""""""  -----')

term.setCursorPos(3, 17); term.write("By PaymentOption")
rPrint(17, "Version: "..VERSION.. "*")
end

function printLogo()
term.setCursorPos(34, 3); term.write("__")
customWrite(4, "                              /  ")
customWrite(5, "                        .-.  |    |")
customWrite(6, "                *    _.-'    __/")
customWrite(7, "                 .-'       ")
customWrite(8, "                /          _/")
customWrite(9, "               |      _  /")
customWrite(10, "               |     /_'")
customWrite(11, "                _____/")
end

function printLogout()
term.setCursorPos(34, 3); term.write("  ")

clearCenter()

cPrint(5, "********")
cPrint(6, "*Logout*")
cPrint(7, "********")
cPrint(8, "/   ")
cPrint(9, "***************")
cPrint(10, "*[ Yes ]  No  *")
cPrint(11, "***************")

while true do
event, key = os.pullEvent("key")

if key == 205 and selection < 2 then selection = 2
elseif key == 203 and selection > 1 then selection = 1

elseif key == 28 and selection == 1 then os.reboot()
elseif key == 28 and selection == 2 then sMenuState = "main"; selection = 6; break
end

if selection == 1 then cPrint(10, "*[ Yes ]  No  *")
else     cPrint(10, "*  Yes  [ No ]*") end
end
end

function printMainMenu()
printBorder()
cPrint(2, "* "..sUserName.." *")
cPrint(3, "*"..string.rep("*", string.len(sUserName)+2).."*")
rPrint(17, "Cannon OS Version: "..VERSION.. "*")

if sMenuState == "main" then printLogo(); rPrint(2, "Mail: "..nMailCount.."*") end

if selection == 1 then cPrint(13, "[ Computer ]     Craft OS     IRC          ")
  cPrint(15, "  E-Mail         Account      Update       ")
end

if selection == 2 then cPrint(13, "  Computer     [ Craft OS ]   IRC          ")
  cPrint(15, "  E-Mail         Account      Update       ")
end

if selection == 3 then cPrint(13, "  Computer       Craft OS   [ IRC ]        ")
  cPrint(15, "  E-Mail         Account      Update       ")
end

if selection == 4 then cPrint(13, "  Computer       Craft OS     IRC          ")
  cPrint(15, "[ E-Mail ]       Account      Update       ")
end

if selection == 5 then cPrint(13, "  Computer       Craft OS     IRC          ")
  cPrint(15, "  E-Mail       [ Account ]    Update       ")
end

if selection == 6 then cPrint(13, "  Computer       Craft OS     IRC          ")
  cPrint(15, "  E-Mail         Account    [ Update ]     ")
end
end
------------------------------












-- Mail related things --
function loadContacts()
local tContacts = fs.list("Mail/Contacts")
for i=1, #tContacts do -- Set the correct computer adress found
local file = fs.open("Mail/Contacts/"..tContacts[i], "r")
local fileContents = file.readAll()
file.close()
tContacts[i] = { name = tContacts[i], id = fileContents }
end

return tContacts
end

function mailMenu()
recipientID = 0
sLine1 = "" -- The message will be split into two lines due to lack of multiline functionality of newread()
sLine2 = ""
sMessage = "" -- The two lines will be combined into the whole message in this variable

selection = 1
nMailCount = 0
screenWidth, screenHeight = term.getSize()

function cPrint(height, string)
local xPos = screenWidth/2 - string.len(string)/2
term.setCursorPos(xPos, height)
term.write(string)
end

function rPrint(height, string)
local xPos = screenWidth - string.len(string)
term.setCursorPos(xPos, height)
term.write(string)
end

clearCenter() -- Remove the cannon logo

local function sendMessage()
sMessage = ";alkdjien".."n"..sMessage
rednet.send(tonumber(recipientID), sMessage)
end

local function printMailMenu()
rPrint(2, "Mail: "..tostring((#(fs.list("Mail"))-1).."*"))

  cPrint(5, "***********")
if selection == 1 then cPrint(6, "*[ Write ]*")
else    cPrint(6, "*  Write  *") end

if selection == 2 then cPrint(7, "*[ eMail ]*")
else    cPrint(7, "*  eMail  *") end

if selection == 3 then cPrint(8, "*[ Cont. ]*")
else    cPrint(8, "*  Cont.  *") end

if selection == 4 then cPrint(9, "*[ Leave ]*")
else    cPrint(9, "*  Leave  *") end
  cPrint(10, "***********")
-- End these damn lines ^^
end

local function printRevise()
local nSelect = 1 -- Too much sharing of the 'select' variable

local function cDraw(width, height, string)
term.setCursorPos(width, height)
term.write(string)
end

local function printRevMenu()
cDraw(29, 5, "*****************")
if nSelect == 1 then cDraw(29, 6, "*[ Send ] Exit  *")
else                    cDraw(29, 6, "*  Send [ Exit ]*") end
cDraw(29, 7, "*****************")
end

while true do
printRevMenu()
event, key = os.pullEvent("key")
-- Freakin' lines man ^^

if key == 205 and nSelect == 1 then nSelect = nSelect+1
elseif key == 203 and nSelect == 2 then nSelect = nSelect-1

elseif key == 28 and nSelect == 1 then sendMessage(); clearCenter(); term.setCursorPos(4, 12); term.write(string.rep(" ", 42)); break
elseif key == 28 and nSelect == 2 then clearCenter(); break
end
end
end

local function composeMail()
clearCenter()

term.setCursorPos(4, 5); term.write("****************************")
term.setCursorPos(4, 6); term.write("*Recipient:                *") -- 15 is the x position for the retrieving of 'recipietID'
term.setCursorPos(4, 7); term.write("****************************")

term.setCursorPos(4, 9); term.write(string.rep("*", 42))
term.setCursorPos(4, 10); term.write("*"..string.rep(" ", 40).."*") -- 2 lines to write the body of the message; 38 spaces per line
term.setCursorPos(4, 11); term.write("*"..string.rep(" ", 40).."*")
term.setCursorPos(4, 12); term.write(string.rep("*", 42))

term.setCursorPos(15, 6) -- Get the recipient ID
recipientID = newRead(14) -- If they entered a contact name then find the id
local tContacts = loadContacts()

for i=1, #tContacts do
if tostring(recipientID) == tContacts[i].name then recipientID = tContacts[i].id end
end

term.setCursorPos(6, 10); sLine1 = newRead(38) -- Character only filter
term.setCursorPos(6, 11); sLine2 = newRead(38)

sMessage = sLine1.." "..sLine2

printRevise()
end

local function contacts()
local nSelect = 1
local scroll = 0;
local tContacts = fs.list("Mail/Contacts")

local function printContacts()
local y = 6
local tContacts = loadContacts()

for i = 1+scroll, #tContacts do
term.setCursorPos(5, y)
if nSelect == i then term.write("[ "..tContacts[i].name.." ]")
else  term.write("  "..tContacts[i].name.."  ") end

term.setCursorPos(43, y); term.write(tContacts[i].id)
y = y+1
if y == 11 then break end
end

term.setCursorPos(4, 3); term.write("********************")
term.setCursorPos(4, 4); term.write("* Ctrl:New Contact *")
end

while true do
clearCenter()
printContainer()
printContacts()

local event, key = os.pullEvent("key")
if key == 208 and nSelect < #(fs.list("Mail/Contacts")) then
if nSelect >= 4 and scroll < #tContacts then scroll = scroll+1; nSelect = nSelect+1
else nSelect = nSelect+1 end
elseif key == 200 and nSelect > 1 then
if nSelect >= 4 and scroll > 0 then scroll = scroll-1; nSelect = nSelect-1
else nSelect = nSelect-1 end
elseif key == 29 or key == 157 then
term.setCursorPos(5, 6); term.write(string.rep(" ", screenWidth-8))
term.setCursorPos(5, 6); term.write("Contact Name: ")
local sContact = newRead(14)

term.setCursorPos(5, 6); term.write(string.rep(" ", screenWidth-8))
term.setCursorPos(5, 6); term.write("Contact ID: ")
local nContactID = newRead(14)

local file = fs.open("Mail/Contacts/"..sContact, "w")
file.write(tostring(nContactID))
file.close()
elseif key == 14 then break

elseif key == 28 then
nSelected = 1
while true do
if nSelected == 1 then
term.setCursorPos(5, 6)
term.write("Delete? [ Yes ] No  ")
else
term.setCursorPos(5, 6)
term.write("Delete?   Yes [ No ]")
end

local event, key = os.pullEvent("key")

if key == 205 and nSelected == 1 then nSelected = nSelected+1
elseif key == 203 and nSelected == 2 then nSelected = nSelected-1

elseif key == 28 and nSelected == 1 then
local tContacts = loadContacts()

for i=1, #tContacts do
if nSelected == i then fs.delete("Mail/Contacts/"..tContacts[i].name) end
end
break
elseif key == 28 and nSelected == 2 then break
end
end
end
end
end

while true do
printMailMenu()

event, key = os.pullEvent("key")

if key == 200 and selection > 1 then selection = selection-1
elseif key == 208 and selection < 4 then selection = selection+1

elseif key == 28 and selection == 1 then composeMail(); sMenuState = "main"; break
elseif key == 28 and selection == 2 then readMail(); sMenuState = "main"; break
elseif key == 28 and selection == 3 then contacts(); selection = 1; term.setCursorPos(4, 3); term.write(string.rep(" ", 17)); clearCenter();
elseif key == 28 and selection == 4 then selection = 4; sMenuState = "main"; break
end
end
end

function newMessage(nSender, sContents)
rPrint(2, "Mail: "..nMailCount.."*")
sMenuState = "newMessage"
local nSelect = 1
local bReading = false -- This is to handle whether or not we should print the reception menu
clearCenter()

local function printMessageMenu()
cPrint(5, "*****************")
cPrint(6, "*  New Message  *")
cPrint(7, "*****************")
if nSelect == 1 then cPrint(8, "*[ Read ] Exit  *")
else  cPrint(8, "*  Read [ Exit ]*") end
cPrint(9, "*****************")
end

while true do
if not bReading then printMessageMenu() end
local event, key = os.pullEvent("key")

if key == 205 then nSelect = nSelect+1
elseif key == 203 then nSelect = nSelect-1

elseif key == 28 and nSelect == 1 then
nMailCount = nMailCount-1
bReading = true
clearCenter()
term.setCursorPos(4, 5); term.write("From: "..nSender)
term.setCursorPos(4, 6); term.write("******"..string.rep("*", string.len(nSender)))

term.setCursorPos(4, 7)
if string.len(sContents) > 42 then
local sContentsLine1 = string.sub(sContents, 1, 42) -- Split the message into two lines if it is greater than 38
local sContentsLine2 = string.sub(sContents, 43, string.len(sContents))

term.write(sContentsLine1)
term.setCursorPos(4, 9)
term.write(sContentsLine2)
else
term.write(sContents)
end
break -- Print the message then end
elseif key == 28 and nSelect == 2 then
clearCenter()
sMenuState = "main"
return
end
end

while true do
cPrint(9, "**********")
cPrint(10, "*[ Exit ]*")
cPrint(11, "**********")

local event, key = os.pullEvent("key")

if key == 28 then sMenuState = "main"; break end
end
end

function readMail()
local sFileOpen = ""
sMenuState = "archive"
clearCenter()

if #(fs.list("Mail"))-1 == 0 then
cPrint(6, "***************")
cPrint(7, "* No messages *")
cPrint(8, "***************")
sleep(1.3)
clearCenter()
cPrint(12, "                     ") -- Clear line 12
return
end

term.setCursorPos(4, 5); term.write(string.rep("*", screenWidth-6))
local y = 6
for i=1, screenHeight - 13 do
term.setCursorPos(4, y); term.write("*"..string.rep(" ", screenWidth-8).."*")
y = y+1
end
term.setCursorPos(4, 11); term.write(string.rep("*", screenWidth-6))

local tMessages = fs.list("Mail")
local nSelections = #tMessages -- How many selections for mail we have
local nSelected = 1

local function clearMessageRectangle()
local y = 6
for i=1, 5 do
term.setCursorPos(5, y); term.write(string.rep(" ", screenWidth - 8))
y = y+1
end
end

local function printMessages()
term.setCursorPos(5, 13); term.write(string.rep(" ", screenWidth - (string.len("*********************")+2)))
term.setCursorPos(screenWidth - (string.len("*********************")+2), 13)
term.write("*********************")
term.setCursorPos(screenWidth - (string.len("* Backspace to exit *")+2), 12)
term.write("* Backspace to exit *")

tMessages = fs.list("Mail")
for i=1, #tMessages do
if tMessages[i] == "Contacts" then table.remove(tMessages, i) end
end -- Remove the 'Contacts' directory from the list

term.setCursorPos(4, 5); term.write(string.rep("*", screenWidth-6))
local y = 6
for i=1, screenHeight - 13 do
term.setCursorPos(4, y); term.write("*"..string.rep(" ", screenWidth-8).."*")
y = y+1
end
term.setCursorPos(4, 11); term.write(string.rep("*", screenWidth-6))


local recX = 6
local recY = 6 -- Positions to hold the x and y coords of where we'll draw the mail
for i=1, #tMessages do
if recX > 41 or recX+string.len(tMessages[i]) > 41 then
recY = recY+2
recX = 6
end
if recY >= 10 then break end

if nSelected == i then recX = recX-1 end
term.setCursorPos(recX, recY)
if nSelected == i then term.write("["..tMessages[i].."]"); recX = recX+1 end
if nSelected ~= i then term.write(tMessages[i]) end

if nSelected == i then
recX = recX + string.len(tMessages[i]) + 2 -- The 2 is for the spaces between the options
else recX = recX + string.len(tMessages[i]) + 2 end
end
end

while true do
cPrint(12, "                     ") -- Clear the last line from the 'return' or 'delete' menu from reading a message
printMessages()

local event, key = os.pullEvent("key")

if key == 205 and nSelected < #tMessages then nSelected = nSelected+1
elseif key == 203 and nSelected > 1 then nSelected = nSelected-1

elseif key == 14 then clearCenter(); term.setCursorPos(5, 12); term.write(string.rep(" ", screenWidth - 7)); term.setCursorPos(5, 13); term.write(string.rep(" ", screenWidth - 7)); cPrint(13, "  Computer       Craft OS     File Browser "); return
elseif key == 28 then
clearCenter()
local sFileOpen = "Mail/"..tMessages[nSelected]
local file = fs.open("Mail/"..tMessages[nSelected], "r")
local nSender = file.readLine()
local sMessage = file.readAll(); -- We'll be using the File Contents as the message to read
file.close()

sMessage = string.gsub(sMessage, tostring(nSender), "") -- Get the message string without the sender
if string.len(sMessage) > 38 then
local sMessageLine1 = string.sub(sMessage, 1, 19)
local sMessageLine2 = string.sub(sMessage, 20, 38)
end

term.setCursorPos(4, 3); term.write("From: "..nSender)
term.setCursorPos(4, 4); term.write("******"..string.rep("*", string.len(tostring(nSender))))
term.setCursorPos(4, 5)
if sMessageLine1 ~= nil then
term.write(sMessageLine1)
term.setCursorPos(4, 6)
term.write(sMessageLine2)
else
term.write(sMessage)
end

nSelected = 1 -- Reset the selection for the 'back' or 'delete' option
term.setCursorPos(5, 12); term.write(string.rep(" ", screenWidth - 7)); term.setCursorPos(5, 13); term.write(string.rep(" ", screenWidth - 7))
while true do
  cPrint(10, "*********************")
if nSelected == 1 then cPrint(11, "*[ Return ] Delete  *")
else    cPrint(11, "*  Return [ Delete ]*") end
  cPrint(12, "*********************")
--

local event, key = os.pullEvent("key")

if key == 205 and nSelected == 1 then nSelected = 2
elseif key == 203 and nSelected == 2 then nSelected = 1

elseif key == 28 and nSelected == 1 then term.setCursorPos(4, 3); term.write(string.rep(" ", string.len("From: "..nSender))); term.setCursorPos(4, 4); term.write(string.rep(" ", string.len("From: "..nSender))) break
elseif key == 28 and nSelected == 2 then
fs.delete(sFileOpen)
sFileOpened = ""
nSelected = 1
term.setCursorPos(4, 3); term.write(string.rep(" ", string.len("From: "..nSender)))
term.setCursorPos(4, 4); term.write(string.rep(" ", string.len("From: "..nSender)))
break
end
end
end
end
end
-------------------------


-- Filbrowser --
function fileBrowser()
sMenuState = "browseing"
clearCenter()

local scroll = 0
local y = 0
local sObjectName = ""
local sObjectType = ""
local nObjectHeight = 0

local nSelect = 1
local tFiles = {}

local function printOptionMenu()
local previousSelection = nSelect
nSelect = 1

while true do
term.setCursorPos(6, 8); term.write(string.rep(" ", 40))
if nSelect == 1 and sObjectType == "File" then cPrint(8, "[Run] Edit  Delete  Exit ")
elseif nSelect == 2 and sObjectType == "File" then cPrint(8, " Run [Edit] Delete  Exit ")
elseif nSelect == 3 and sObjectType == "File" then cPrint(8, " Run  Edit [Delete] Exit ")
elseif nSelect == 4 and sObjectType == "File" then cPrint(8, " Run  Edit  Delete [Exit]")
end

local event, key = os.pullEvent("key")

if key == 205 and nSelect < 4 then nSelect = nSelect+1
elseif key == 203 and nSelect > 1 then nSelect = nSelect-1
elseif key == 14 or key == 28 and nSelect == 4 then nSelect = previousSelection; return false
elseif nSelect == 1 and key == 28 then clear(); shell.run(sObjectName); sMenuState = "main"; return true
elseif nSelect == 2 and key == 28 then clear(); shell.run("edit", sObjectName); sMenuState = "main"; return true
elseif nSelect == 3 and key == 28 then fs.delete(shell.dir().."/"..sObjectName); sMenuState = "main"; return true
end
end
end

local function printFileContainer()
term.setCursorPos(4, 5); term.write(string.rep("*", screenWidth-6))
local y = 6
for i=1, screenHeight - 13 do
term.setCursorPos(4, y); term.write("*"..string.rep(" ", screenWidth-8).."*")
y = y+1
end
term.setCursorPos(4, 11); term.write(string.rep("*", screenWidth-6))
end

local function printFiles()
local sDir = shell.dir()
clearCenter()
printFileContainer() -- This is the rectangle we'll be displaying the options in
y = 6
tFiles = fs.list( sDir )


for i=1+scroll, #tFiles do
if i == nSelect then nObjectHeight = y end
sObjectName = tostring(shell.dir()).."/"..tFiles[nSelect]
if fs.isDir(tostring(shell.dir()).."/"..tFiles[nSelect]) then sObjectType = "Dir"
else     sObjectType = "File"
end

term.setCursorPos(6, y)

if nSelect == i then term.write("["..tFiles[i].."]")
else  term.write(" "..tFiles[i].." ") end

if fs.isDir(tostring(shell.dir()).."/"..tFiles[i]) then term.setCursorPos(42, y); term.write("D ")
else term.setCursorPos(42, y); term.write("F ") end

y = y+1
if y == 11 then break end
end
end

while true do
printFiles()

local event, key = os.pullEvent("key")

if key == 200 and nSelect == 1 then nSelect = 1
elseif key == 208 and nSelect == #tFiles then nSelect = #tFiles

elseif key == 208 and nSelect < #tFiles then
if nSelect >= 5 and scroll < #tFiles then scroll = scroll+1; nSelect = nSelect+1
else nSelect = nSelect+1 end
elseif key == 200 and nSelect > 1 then
if nSelect >= 5 and scroll > 0 then scroll = scroll-1; nSelect = nSelect-1
else nSelect = nSelect-1 end

elseif key == 28 and sObjectType == "File" then
if printOptionMenu() then return end
elseif key == 28 and sObjectType == "Dir" then shell.setDir(sObjectName); scroll = 0; nSelect = 1
elseif key == 14 and shell.dir() ~= "" then shell.run("cd", ".."); scroll = 0; nSelect = 1
elseif key == 14 and shell.dir() == "/" or shell.dir() == "" then sMenuState = "main"; break
end
end
end
----------------


-- IRC Client --
function IRC_Client()
sMenuState = "irc"

-- VARS --
local sServerName = ""
local nServerID = 0
local bConnected = false

local sUserName = ""
local sText = ""

nConversationY = 3
----------

-- Helper local functions --
local function newReadIRC( _charLimit, _ReplaceChar) -- The filter can either be a 1, 0, or nil. 1 is Numbers only, 0 is letters only, and nil is both
local sMessage = ""
term.setCursorBlink(true)
local originalCursorX, originalCursorY = term.getCursorPos()

while true do
local cursorX, cursorY = term.getCursorPos()
local event, p1, p2 = os.pullEvent()

if _charLimit ~= nil then
if string.len(sMessage) == _charLimit then term.setCursorBlink(false); return sMessage end
end

if event == "char" then sMessage = sMessage..p1
--[[elseif event == "key" then -- The escape key has keyID 1 so: 0 = keyID: 11, 1 = keyID: 2, 2 = keyID : 3 etc etc....
if p1 == 11 or p1 == 2 or p1 == 3 or p1 == 4 or p1 == 5 or p1 == 6 or p1 == 7 or p1 == 8 or p1 == 9 or p1 == 10 then
--        0       1          2          3          4          5          6          7          8           9
sMessage = sMessage..(p1-1)
end--]]
end

if event == "key" and p1 == 28 then
term.setCursorBlink(false)
term.setCursorPos(1, screenHeight)
term.write(string.rep(" ", screenWidth))
return sMessage
end-- Enter key; end the loop and let's see the string

if event == "key" and p1 == 14 then -- Backspace...
sMessage = string.sub(sMessage, 1, string.len(sMessage)-1)
-- Set our message to the substring of the first charcter
-- To the length of the message minus 1 to achieve one less letter.

term.setCursorPos(originalCursorX, cursorY)
term.write(sMessage.." ") -- Adding this empty space clears the removed character from the line, but may pose future issues
end

if event == "rednet_message" and p1 == nServerID then
if nConversationY == 10 then
for i=3, 14 do
term.setCursorPos(3, i); term.write(string.rep(" ", screenWidth-4))
end

term.setCursorPos(3, 2); term.write(sServerName..":")
term.setCursorPos(5, screenHeight-1)
nConversationY = 3
end

if p1 == nServerID and p2 == "dlskjfiejdlijfklsdj" then bConnected = false; return nil end
term.setCursorPos(3, nConversationY); term.write(p2)
nConversationY = nConversationY+1
term.setCursorPos(string.len(sMessage)+6, screenHeight)
end

term.setCursorPos(originalCursorX, cursorY); term.write(string.rep(" ", string.len(sMessage)))
-- Clear the previous line just in case we get a new line
-- Now write the message on the new line
if _ReplaceChar ~= nil then
term.setCursorPos(originalCursorX, cursorY)
term.write(string.rep( _ReplaceChar, string.len(sMessage) ))
else
term.setCursorPos(originalCursorX, cursorY)
term.write(sMessage)
end
end
end
----------------------

-- Input related local functions --
local function getInput()
cPrint(4, "IRC Version: Beta 1.0")
cPrint(5, "Server ID: ")
cPrint(6, " Username: ")

rPrint(17, "Common channels: 146, 174, 175, 176, 177*")

term.setCursorPos(screenWidth/2 - string.len("Server ID: ")/2 + string.len("Server ID: "), 5)
nServerID = tonumber(newRead(5))

term.setCursorPos(screenWidth/2 - string.len(" Username: ")/2 + string.len(" Username: "), 6)
sUserName = newRead(14)
end
-----------------------------

-- Networking related local functions --
local function connectToServer()
if bConnected == true then return nil end

if nServerID ~= nil then
rednet.send(tonumber(nServerID), "dlsk;fje3ijoidsjfl")

sender, message = rednet.receive(0.2)

if sender == nServerID and message == "a;sodifu39798d0f3" then
rednet.send(tonumber(nServerID), tostring(sUserName))

sender, message = rednet.receive(0.1)

if sender == nServerID and message == "ifjdslfije" then
bConnected = true

sender, message = rednet.receive(0.2)

if sender == nServerID then sServerName = message end
end
end
else os.shutdown() end
end

local function sendMessage( _sMessage )
rednet.send( tonumber(nServerID), _sMessage )
end
----------------------------------

printBorder()
getInput()
connectToServer()
clear()
printBorder()
term.setCursorPos(3, 2); term.write(sServerName..":")
term.setCursorPos(3, screenHeight-1); term.write("> ")

while bConnected do
if nConversationY == 10 then
for i=3, 14 do
term.setCursorPos(3, i); term.write(string.rep(" ", screenWidth-4))
end

term.setCursorPos(3, 2); term.write(sServerName..":")
term.setCursorPos(5, screenHeight-1)
nConversationY = 3
end

sText = newReadIRC(screenWidth-7) -- This will be our disconnection message: dslifj
if sText == "!exit" then clear(); sMenuState = "main"; break end
if sText == nil then term.setCursorBlink(false); sMenuState = "main"; break end

if sText ~= sUserName then sendMessage(sText)
else nConversationY = nConversationY-1 end
sText = ""
term.setCursorPos(3, screenHeight-1); term.write(string.rep(" ", screenWidth-4))
term.setCursorPos(3, screenHeight-1); term.write("> ")

term.setCursorPos(2, screenHeight); term.write(string.rep("*", screenWidth-2))
term.setCursorPos(5, screenHeight-1)
end
clear()
sMenuState = "main"
end
---------------------


-- Account --
function editAccount()
sMenuState = "account"
local nSelect = 1

clearCenter()
local function printInfoContainer()
term.setCursorPos(4, 5); term.write(string.rep("*", screenWidth-6))
local y = 6
for i=1, screenHeight - 13 do
term.setCursorPos(4, y); term.write("*"..string.rep(" ", screenWidth-8).."*")
y = y+1
end
term.setCursorPos(4, 11); term.write(string.rep("*", screenWidth-6))
end

printInfoContainer()
while true do
if nSelect == 3 then sMenuState = "main"; break end

term.setCursorPos(5, 7); term.write("Username: "..sUserName)
term.setCursorPos(5, 8); term.write("Password: "..string.rep("*", string.len(sPassword)))

if nSelect == 1 then term.setCursorPos((screenWidth-6)-(string.len("[ Change ]*")-4), 7); term.write("[ Change ]*")
else  term.setCursorPos((screenWidth-6)-(string.len("[ Change ]*")-4), 7); term.write("  Change  *") end

if nSelect == 2 then term.setCursorPos((screenWidth-6)-(string.len("[ Change ]*")-4), 8); term.write("[ Change ]*")
else  term.setCursorPos((screenWidth-6)-(string.len("[ Change ]*")-4), 8); term.write("  Change  *") end

local event, key = os.pullEvent("key")

if key == 208 and nSelect == 1 then nSelect = nSelect+1
elseif key == 200 and nSelect == 2 then nSelect = nSelect-1

elseif key == 28 and nSelect == 1 then
term.setCursorPos(5, 7); term.write(string.rep(" ", screenWidth-8))
term.setCursorPos(5, 7); term.write("New Username: ")
sUserName = newRead(14)
term.setCursorPos(5, 7); term.write(string.rep(" ", screenWidth-8))

local file = fs.open("User/"..os.getComputerID().."/.info", "w")
file.write(sUserName.."n"..sPassword)
file.close()
elseif key == 28 and nSelect == 2 then
term.setCursorPos(5, 8); term.write(string.rep(" ", screenWidth-8))
term.setCursorPos(5, 8); term.write("Old Password: ")
local sCheckPassword = newRead(14, "*")

if sCheckPassword == sPassword then
term.setCursorPos(5, 8); term.write(string.rep(" ", screenWidth-8))
term.setCursorPos(5, 8); term.write("New Password: ")
sPassword = newRead(14, "*")

local file = fs.open("User/"..os.getComputerID().."/.info", "w")
file.write(sUserName.."n"..sPassword)
file.close()
end
term.setCursorPos(5, 8); term.write(string.rep(" ", screenWidth-8))
elseif key == 14 then nSelect = 3
end
end
end
-------------

function printError()
sMenuState = "perms"; clearCenter()
cPrint(6, "*********************")
cPrint(7, "* Restricted Access *")
cPrint(8, "*********************")
sleep(2)
sMenuState = "main"
end



clear()
getKey() -- b8v2a6b8i1e2j8g91
clear()
printInstallation()
clear()
checkUserInformation()
getUserInformation()
handleLogin()

if bLogin then
if checkVersion() then
sMenuState = "updateScreen"
clear()
printBorder()
rPrint(17, "Cannon OS Version: "..VERSION.."*")
cPrint(6, "********************")
cPrint(7, "* Update Available *")
cPrint(8, "********************")

local select = 1
while true do
if select == 1 then cPrint(9, "*   [ Yes ] No     *")
else     cPrint(9, "*     Yes [ No ]   *")
end
cPrint(10, "********************")

local event, key = os.pullEvent("key")

if key == 205 and select == 1 then select = 2
elseif key == 203 and select == 2 then select = 1

elseif key == 28 and select == 1 then clear(); printBorder(); rPrint(17, "Cannon OS Version: "..VERSION.."*"); fs.delete("SYSTEM"); fs.delete("User"); term.setCursorPos(screenWidth/2-string.len("Updating...")/2, 9); textutils.slowPrint("Updating..."); updateSelf(); shell.run("startup")
elseif key == 28 and select == 2 then sMenuState = "main"; clearCenter(); break
end
end
end
end

-- Main OS Loop --
while true do
clear()
nMailCount = #(fs.list("Mail"))-1 -- -1 To eliminate the 'Contacts' directory from the list
printMainMenu()

event, key, p2 = os.pullEvent() -- Key will be p1, laziness has struck again

if event == "key" and key == 205 and selection < 6 and selection ~= 3 then selection = selection+1
elseif event == "key" and key == 203 and selection > 1 and selection ~= 4 then selection = selection-1
elseif event == "key" and key == 208 and selection < 6 and selection+3 <= 6 then selection = selection+3
elseif event == "key" and key == 200 and selection > 1 and selection-3 >= 1 then selection = selection-3

elseif event == "key" and key == 28 and selection == 6 then
clear(); printBorder(); rPrint(17, "Cannon OS Version: "..VERSION.."*"); term.setCursorPos(screenWidth/2-string.len("Updating...")/2, 9); textutils.slowPrint("Updating...")
if not updateSelf() then cPrint(9, "Update Failed"); sleep(1.3); shell.run("startup")
else fs.delete("SYSTEM"); fs.delete("User"); cPrint(9, "Update Successfull"); sleep(1.3); shell.run("startup")
end
elseif event == "key" and key == 28 and selection == 2 and bAdmin then clear(); shell.run("shell")-- If exit to Craft OS
elseif event == "key" and key == 28 and selection == 2 and not bAdmin then printError()

elseif event == "key" and key == 28 and selection == 4 and bAdmin then mailMenu()
elseif event == "key" and key == 28 and selection == 4 and not bAdmin then printError()

elseif event == "key" and key == 28 and selection == 1 and bAdmin then fileBrowser()
elseif event == "key" and key == 28 and selection == 1 and not bAdmin then printError()

elseif event == "key" and key == 28 and selection == 3 then clear(); IRC_Client()

elseif event == "key" and key == 28 and selection == 5 and bAdmin then editAccount()
elseif event == "key" and key == 28 and selection == 5 and not bAdmin then printError()

elseif event == "rednet_message" then
if string.find( p2, ";alkdjien") then
p2 = string.sub( p2, string.len(";alkdjien"), string.len( p2 ))
p2 = string.sub( p2, 3, string.len( p2 )) -- 3 to remove the n from the message
local file = fs.open("Mail/message"..#(fs.list("Mail"))+1, "w")
file.writeLine(key)
file.writeLine(p2)
file.close()

nMailCount = nMailCount+1
newMessage(key, p2) -- Key being the senderID and p2 being the message received
end
elseif event == "reboot" then selection = 1; sMenuState = "logout"; printLogout()
end
end
------------------

os.pullEvent = oldpullEvent