[AUT] Installer

--[[

    Autos
    Official Installer

]]--

-- Files to download
local tFiles = {
    [1] = { c = "P8eS7wLr", t = "/startup" },
    [2] = { c = "xpgTi8rg", t = "/System/.osfiles/osparts/desktop" },
    [3] = { c = "ZQ71nxhn", t = "/System/.osfiles/resources/APIs/autos" },
    [4] = { c = "LVtcJbNe", t = "/System/.osfiles/resources/APIs/settings" },
    [5] = { c = "5AFEKqJA", t = "/System/changelog" },
    [6] = { c = "G8fpURBG", t = "/System/credits" },
    [7] = { c = "b2wATXFv", t = "/System/.osfiles/resources/IMGs/fileIcon1.img" },
    [8] = { c = "aXcyP6fV", t = "/System/.osfiles/resources/IMGs/fileIcon2.img" },
    [9] = { c = "kUE4WXk1", t = "/System/.osfiles/resources/IMGs/fileBack1.img" },
    [10] = { c = "8EFQPB2p", t = "/System/.osfiles/resources/IMGs/fileSplash.img" }
}

-- The colors of the GUI
local col_mainback = 8
local col_maintext = 1
local col_butnhilb = 16
local col_butnhilt = 32768
local col_butnback = 2048
local col_butntext = 1
local col_titlback = 2048
local col_titlhilb = 8192
local col_titlhilt = 1

-- Current version
local version = "0.01"
-- The size of the terminal
local w,h = term.getSize()
-- The selected item (for menu)
local selectedItem = 1
-- Detects if in main menu or not
local inMainMenu = true
-- Detects if installing
local installing = false
-- Detects if uninstalling
local uninstalling = false
-- Detects if in apps menu or not
local appsMenu = false
-- The table for what to do when uninstalling
uninstallFiles = {
    "fs.delete('/System')",
    "fs.delete('/startup')",
    "print('Autos has been removed.')"
}

-- Function that prints things to the middle of the screen (EXACTLY, NOT 1 BEHIND)
function cPrint(t)
    local x,y = term.getCursorPos()
    local x = math.max(math.floor((w/2) - (#t / 2)), y)
    term.setCursorPos(x+1,y)
    print(t)
end
-- Function that writes things to the middle of the screen (EXACTLY, NOT 1 BEHIND)
function cWrite(t)
    local x,y = term.getCursorPos()
    local x = math.max(math.floor((w/2) - (#t / 2)), y)
    term.setCursorPos(x+1,y)
    write(t)
end

-- Draws the background and title bar
function draw_maingui()
    term.setBackgroundColor(col_mainback)
    term.clear()
    term.setCursorPos(1,1)
    term.setBackgroundColor(col_titlback)
    term.clearLine()
    term.setTextColor(col_titlhilt)
    term.setBackgroundColor(col_titlhilb)
    cPrint("[ Autos "..version.." Installer ]")
    cPrint("")
    cPrint("")
end

-- Draws the download
function draw_downloadtitle()
    draw_maingui()
    term.setBackgroundColor(col_mainback)
    term.setTextColor(col_maintext)
    term.setCursorPos(2,4)
    print("Downloading: ")
end

-- Sets the background
function autosBack()
    appsMenu = false
    installing = false
    downloadApp = false
    removeApp = false
    inMainMenu = true
    selectedItem = 1
end

-- Install autos
function autosInstall()
    installing = true
    draw_maingui()
    term.setBackgroundColor(col_mainback)
    term.setTextColor(col_maintext)
    term.setCursorPos(2,4)
    cPrint("Creating directories...")
    fs.makeDir("/System")
    fs.makeDir("/System/.osfiles/")
    fs.makeDir("/System/.osfiles/resources")
    fs.makeDir("/System/.osfiles/applications")
    fs.makeDir("/System/.osfiles/osparts")
    fs.makeDir("/System/.osfiles/users")
    fs.makeDir("/System/.osfiles/resources/APIs")
    fs.makeDir("/System/.osfiles/resources/IMGs")
    sleep(0.1)
    for i=1, #tFiles do
        draw_downloadtitle()
        term.setCursorPos(2,5)
        term.setTextColor(colors.gray)
        print(tFiles[i].t)
        sFile = http.get("http://pastebin.com/raw.php?i="..tFiles[i].c)
        local contents = sFile.readAll()
        sFile.close()
        local file = fs.open(tFiles[i].t,"w")
        file.write(contents)
        file.close()
    end
    draw_maingui()
    term.setBackgroundColor(col_mainback)
    term.setTextColor(col_maintext)
    cPrint("Complete. Rebooting...")
    sleep(0.5)
    os.reboot()
end

-- Uninstall autos
function autosUninstall()
    uninstalling = true
    while uninstalling do
        draw_maingui()
        term.setBackgroundColor(col_mainback)
        term.setTextColor(col_maintext)
        cPrint("Setting up uninstaller...")
        local file = fs.open("/startup","w")
        for i=1,#uninstallFiles do
            file.writeLine(uninstallFiles[i])
        end
        file.close()
        sleep(1)
        draw_maingui()
        term.setBackgroundColor(col_mainback)
        term.setTextColor(col_maintext)
        cPrint("Rebooting...")
        sleep(1)
        os.reboot()
    end
end

-- Downloads app function
function autosDownloads()
    appsMenu = true
    selectedItem = 1
    while appsMenu do
        draw_maingui()
        term.setBackgroundColor(col_butnback)
        term.setTextColor(col_butntext)
        cPrint("    [ App Menu ]    ")
        cPrint("                    ")
        printMenu(downloadsMenu)
        term.setBackgroundColor(col_butnback)
        cPrint("                    ")
        local event,key = os.pullEvent("key")
        oKeyPressed(key,downloadsMenu)
    end
end

-- Exit menu function
function autosExit()
    inMainMenu = false
    term.setBackgroundColor(colors.black)
    term.clear()
    term.setCursorPos(1,1)
end

-- Download app function
function autosDownloadApp()
    downloadApp = true
    while downloadApp do
        draw_maingui()
        term.setBackgroundColor(col_mainback)
        term.setTextColor(col_maintext)
        term.setCursorPos(2,4)
        write("Pastebin ID: ")
        local code = read()
        draw_maingui()
        term.setBackgroundColor(col_mainback)
        term.setTextColor(col_maintext)
        term.setCursorPos(2,4)
        write("App name: ")
        local name = read()
        draw_maingui()
        term.setBackgroundColor(col_mainback)
        term.setTextColor(col_maintext)
        cPrint("Downloading app...")
        if not fs.exists("/System/.osfiles/applications/"..name) then
            local httpCode = http.get("http://pastebin.com/raw.php?i="..e(code))
            local contents = httpCode.readAll()
            local file = assert(fs.open("/System/.osfiles/applications/"..name,"w"))
            file.write(contents)
            file.close()
            sleep(1)
            cPrint("Complete!")
            autosBack()
        else
            draw_maingui()
            term.setBackgroundColor(col_mainback)
            term.setTextColor(col_maintext)
            cPrint("App already found!")
            sleep(1)
            autosBack()
        end
        downloadApp = false
    end
end

-- Remove app function
function autosRemoveApp()
    removeApp = true
    while removeApp do
        drawTitle()
        term.setBackgroundColor(colors.white)
        term.setTextColor(colors.black)
        term.setCursorPos(2,4)
        write("App name:  ")
        local name = read()
        if fs.exists("/System/.osfiles/applications/"..name) then
            draw_maingui()
            term.setBackgroundColor(col_mainback)
            term.setTextColor(col_maintext)
            fs.delete("/System/.osfiles/applications/"..name)
            cPrint("Removed!")
            sleep(1)
            autosBack()
        else
            draw_maingui()
            term.setBackgroundColor(col_mainback)
            term.setTextColor(col_maintext)
            cPrint("App doesn't exist!")
            sleep(1)
            autosBack()
        end
    end
end

mainMenu = {
    [1] = { text = "Install  ", handler = autosInstall },
    [2] = { text = "Uninstall", handler = autosUninstall },
    [3] = { text = "Downloads", handler = autosDownloads },
    [4] = { text = "Quit     ", handler = autosExit }
}

downloadsMenu = {
    [1] = { text = "Download App", handler = autosDownloadApp },
    [2] = { text = "Remove App  ", handler = autosRemoveApp },
    [3] = { text = "Back        ", handler = autosBack }
}

-- Prints menus
function printMenu( menu )
  for i=1,#menu do
    if i == selectedItem then
      term.setBackgroundColor(col_butnhilb)
      term.setTextColor(col_butnhilt)
      cPrint("    "..menu[i].text.."    ")
    else
      term.setBackgroundColor(col_butnback)
      term.setTextColor(col_butntext)
      cPrint("    "..menu[i].text.."    ")
    end
  end
end

-- A handler for a key pressed in a menu
function oKeyPressed(key,menu)
    if key == keys.enter then
        oItemSelected(menu)
    elseif key == keys.up then
        if selectedItem >= 1 then
            selectedItem = selectedItem - 1
        end
    elseif key == keys.down then
        if selectedItem <= #menu then
            selectedItem = selectedItem + 1
        end
    end
end

-- A handler for the selected item in a menu
function oItemSelected(menu)
    menu[selectedItem].handler()
end

function main()
    while inMainMenu do
        draw_maingui()
        term.setBackgroundColor(col_butnback)
        term.setTextColor(col_butntext)
        cPrint("  [ Main Menu ]  ")
        cPrint("                 ")
        printMenu(mainMenu)
        term.setBackgroundColor(col_butnback)
        cPrint("                 ")
        local event,key = os.pullEvent("key")
        oKeyPressed(key,mainMenu)
    end
end

main()