[ComputerCraft] OS '16 Alpha 1.0 Installer

local w,h = term.getSize()

function fwrite(path, text)
    local file = assert(io.open(path, "w"))
    file:write(text)
    file:close()
end

local files = {
    "startup",
    "startupAlternative",
    ".ccYouTube/apis/box",
    ".ccYouTube/apis/extStrLib",
    ".ccYouTube/apis/loadingScreen",
    ".ccYouTube/logos/ccytLogo",
    ".ccYouTube/logos/home",
    ".opt/GUI/config._conf",
    ".opt/GUI/icoDName._conf",
    ".opt/GUI/icoLoc._conf",
    ".opt/GUI/icoName._conf",
    ".opt/GUI/icoRun._conf",
    ".opt/logon/.uacc",
    ".opt/start/bios",
    ".opt/start/bootloader",
    ".sys/API/kernal",
    ".sys/Backgrounds/advcomp.bg",
    ".sys/Backgrounds/normcomp.bg",
    ".sys/GUI/desktop",
    ".sys/GUI/startmenu._GUI",
    ".sys/GUI/startmenuAlternative._GUI",
    ".sys/Programs/ccYT.16",
    ".sys/Programs/fMan.16",
    ".sys/Programs/mouse.cfg",
    ".sys/Programs/npp.16",
    ".sys/icons/OS16.ico",
    ".sys/icons/icon1.nfp",
    ".sys/icons/icon2.nfp",
    ".sys/icons/icon3.nfp",
    ".sys/logon/usr_login",
    ".var/OSver/ver.16"
}

local folders = {
    ".ccYouTube",
    ".ccYouTube/apis/",
    ".ccYouTube/downloads/",
    ".ccYouTube/logos/",
    ".ccYouTube/recycleBin/",
    ".opt",
    ".opt/GUI/",
    ".opt/logon/",
    ".opt/start/",
    ".sys/API/",
    ".sys/Backgrounds/",
    ".sys/GUI/",
    ".sys/Programs/",
    ".sys/icons/",
    ".sys/logon/",
    ".var",
    ".var/OSver/"
}

local urls = {
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/startup",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/startupAlternative",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.ccYouTube/apis/box",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.ccYouTube/apis/extStrLib",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.ccYouTube/apis/loadingScreen",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.ccYouTube/logos/ccytLogo",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.ccYouTube/logos/home",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.opt/GUI/config._conf",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.opt/GUI/icoDName._conf",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.opt/GUI/icoLoc._conf",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.opt/GUI/icoName._conf",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.opt/GUI/icoRun._conf",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.opt/logon/.uacc",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.opt/start/bios",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.opt/start/bootloader",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/API/kernal",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/Backgrounds/advcomp.bg",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/Backgrounds/normcomp.bg",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/GUI/desktop",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/GUI/startmenu._GUI",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/GUI/startmenuAlternative._GUI",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/Programs/ccYT.16",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/Programs/fMan.16",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/Programs/mouse.cfg",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/Programs/npp.16",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/icons/OS16.ico",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/icons/icon1.nfp",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/icons/icon2.nfp",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/icons/icon3.nfp",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.sys/logon/usr_login",
    "http://erik0004.890m.com/cc/OS16/Alpha1.0/.var/OSver/ver.16"
}

local function startInstaller()
    if not http then
    term.setBackgroundColor(colors.black)
    term.clear()
    term.setTextColor(colors.red)
    term.setCursorPos(1,1)
    print("You need the http API to run this installer.")
    end
    if not term.isColor() or term.isColour() or term.isColor or term.isColour then
    term.setBackgroundColor(colors.black)
    term.clear()
    term.setTextColor(colors.red)
    term.setCursorPos(1,1)
    print("You need an Advanced Computer to use this OS.")
    end
    for i,v in pairs(folders) do
    if fs.exists(v) then
    term.setBackgroundColor(colors.black)
    term.clear()
    term.setTextColor(1)
    term.setCursorPos(math.floor(w-#"Found an older version of OS'16,")/2,9)
    print("Found an older version of OS'16,")
    term.setCursorPos(math.floor(w-#"deleting it...")/2,10)
    print("deleting it...")
    sleep(1)
    fs.delete(v)
    end
    end
    for i,v in pairs(files) do
    if fs.exists(v) then
    term.setBackgroundColor(colors.black)
    term.clear()
    term.setTextColor(1)
    term.setCursorPos(math.floor(w-#"Found an older version of OS'16,")/2,9)
    print("Found an older version of OS'16,")
    term.setCursorPos(math.floor(w-#"deleting it...")/2,10)
    print("deleting it...")
    sleep(1)
    fs.delete(v)
    end
    end
end

local function install()
    startInstaller()
    term.setBackgroundColor(2048)
    term.clear()
    term.setTextColor(1)
    term.setCursorPos(math.floor(w-#"OS'16 Installer")/2,1)
    print("OS'16 Installer")
    term.setCursorPos(1,2)
    print(string.rep("-",51))
    term.setCursorPos(math.floor(w-#"Installing OS'16...")/2,9)
    print("Installing OS'16...")
    term.setCursorPos(math.floor(w-#"Making the OS Folders...")/2,10)
    print("Making the OS Folders...")
    for i,v in pairs(folders) do
    fs.makeDir(v)
    end
    sleep(1)
    term.setCursorPos(math.floor(w-#"Fetching files from the download website...")/2,10)
    print("Fetching files from the download website...")
    for i,v in pairs(files) do
    dl = http.get(urls[i])
    fwrite(v, dl.readAll())
    sleep(3)
    end
    term.setCursorPos(1,10)
    term.setBackgroundColor(2048)
    term.clearLine()
    term.setCursorPos(math.floor(w-#"OS'16 is succesfully installed. Rebooting..")/2,9)
    print("OS'16 is succesfully installed. Rebooting..")
    if fs.exists("/install") then
    fs.delete("/install")
    sleep(2)
    os.reboot()
    else
    sleep(2)
    os.reboot()
    end
end
install()