Installer

--[[
GalyOS - Installer
Location: nil
Version Number: 0.4.2
--]]

-- Variables
    inst = false
    version = false
    yes = false
    no = false
    vn = "0.4.2"
    filedir = {'','','','progs/','progs/','progs/'}
    filenames = {'install.lua','startup.lua','GalyAPI','DigRoom','move','tturn'}
    files = {'V8G8uaMg','cTmW8KS2','aY6Kbsz6','kC5ceV7Y','jU6WCxDA','zJaJZM55'}


-- Functions
    function fixstartup()
        if fs.exists("/startup.lua") then
            startup = fs.open("/startup.lua","r")
            firstline = startup.readLine()
            if firstline == "shell.run('install.lua')" then
                print("Deleting installer startup line")
                startup.close()
                startup = fs.open("/startup.lua","r")
                startuptext = startup.readAll()
                startup.close()
                newstartuptext = string.sub(startuptext,26)
                startup= fs.open("/startup.lua","w")
                startup.write(newstartuptext)
                startup.close()
            else
                startup.close()
            end
        end
    end

    function mkdir(dir)
        shell.run("mkdir",dir)
    end

    function install(dir,name,pb)
        shell.run("pastebin","get",pb,dir..name)
    end

    function update(name,pb)
        print("Checking if installer is up to date")
        shell.run("pastebin","get",pb,"/temp/" .. name)
        tempfile = fs.open("/temp/" .. name, 'r')
        for i=1,4 do
            line = tempfile.readLine()
            if i==4 then
                pbver = string.sub(line,17)
                if pbver == vn then
                    fs.delete("/temp")
                    print("Installer is up to date")
                else
                    print("Installer is out of date")
                    print("New version = |" .. pbver .. "|")
                    print("Current version = |" .. vn .. "|")
                    print("Would you like me to update you to the new version?")
                    print("y = yes - n = no")
                    while yes == false and no == false do
                        sleep(1)
                    end
                    if yes == true then
                        print("Replacing Installer")
                        os.sleep(5)
                        term.clear()
                        term.setCursorPos(1,1)
                        fs.delete("/"..name)
                        fs.copy("/temp/" .. name , "/" .. name)
                        fs.delete("/temp")
                        term.clear()
                        term.setCursorPos(1,1)
                        startup = fs.open("/startup.lua","r")
                        startuptext = startup.readAll()
                        startup.close()
                        startuptextnew = ("shell.run('install.lua')\n") .. startuptext
                        print("Appending startup file")
                        fs.delete(shell.getRunningProgram())
                        startup = fs.open("/startup.lua","w")
                        startup.write(startuptextnew)
                        startup.close()
                        print("Restarting")
                        os.reboot()
                    elseif no == true then
                        no = false
                        fs.delete("/temp")
                    end
                end
            end
        end
    end

    function quitProgram()
        local event, param1 = os.pullEvent("char")
        if param1 == "q" then
            quit = true
        elseif param1 == "i" then
            inst = true
        elseif param1 == "v" then
            version = true
        elseif param1 == "y" then
            yes = true
        elseif param1 == "n" then
            no = true
        end
    end

    function Program()
        term.clear()
        term.setCursorPos(1,1)
        print("Welcome to GalyOS")
        fixstartup()
        update(filenames[1],files[1])
        print("At any time you may press Q to quit")
        print("Press I to install")
        print("Press v for version info")
        while inst == false and version == false do
            sleep(1)
        end
        if version == true then
            term.clear()
            term.setCursorPos(1,1)
            --print version info
            print("You are running Galycraft installer version " .. vn .. "\n\n")
            print("To return to the installer press any key")
            print("To quit installer press Q")
            local event, key = os.pullEvent( "key" )
            if key then
                version = false
                Program()
            end
        end
        if inst == true then
            term.clear()
            term.setCursorPos(1,1)
            print("Installing GalyOS\n")
            for i=2,#filenames do
                install(filedir[i],filenames[i],files[i])
            end
        end
        fs.delete(shell.getRunningProgram())
        print("Install Complete")
        print("Press r to restart terminal")
        local event, key = os.pullEvent( "key" )
        if key == keys.r then
            os.reboot()
        end

    end


    while true do
        parallel.waitForAny(quitProgram, Program)
        if quit then
            print("Quitting....")
            break
        end

        --Other code
        sleep(0.05) --Sleep 1 tick
    end