index

while true do
    term.setBackgroundColor(colors.white)
    term.setTextColor(colors.black)
    term.clear()
    term.setCursorPos(1, 10)
    center("Chattr - by Chervilpaw")
    term.setCursorPos(3, 12)
    write("Username: ")
    term.setCursorPos(3, 14)
    write("Password: ")
    term.setCursorPos(13, 12)
    local username = read()
    term.setCursorPos(13, 14)
    local password = read("*")

    term.setCursorPos(3, 18)
    term.setTextColor(colors.red)
    local t = firewolf.query("login", {user=username, pass=password})
    if t == "valid" then
        term.setTextColor(colors.green)
        write("Success!")
        sleep(1)
        break
    elseif t ==  "invalid" then
        write("Wrong password/invalid username")
        sleep(1)
    elseif t == "noparm" then
        write("Forgot to enter username/password.")
        sleep(1)
 elseif t == false then
  write("Query errored.")
  sleep(2)
    else
        write("Unknown error.")
        sleep(1)
    end
end
local inputColor = colors.gray
local chatColor = colors.black
local rawChats = firewolf.query("chat", {user = username, pass = password, message = "I joined."})

local updateChat = function()
    local previousX, previousY = term.getCursorPos()
    if rawChats then
        term.setTextColor(chatColor)
        local chat = textutils.unserialize(rawChats)
        if chat then
            local previousPosition = term.getCursorPos(1, 2)
            for k,v in pairs(chat) do
                term.setCursorPos(1, k)
                term.clearLine()
                if v.user then
                    term.write("<"..tostring(v.user)..">: "..tostring(v))
                else
                    term.write(v)
                end
            end
        else
            center("Invalid response from server! Retrying...")
        end
    else
        term.setCursorPos(1, 1)
        term.setTextColor(colors.red)
        center("Failed to connect to server! Retrying...")
    end
    term.setTextColor(inputColor)
    term.setCursorPos(previousX, previousY)
end

local chatUpdateLoop = function()
    while true do
        rawChats = firewolf.query("chat")
        updateChat()
        sleep(2)
    end
end

local readInput = function()
    while true do
        term.setTextColor(inputColor)
        term.setCursorPos(1, 18)
        term.write(string.rep("-", 51))
        term.setCursorPos(1, 19)
        term.clearLine()
        term.write("> ")
        local message = read()
        term.setCursorPos(1, 18)
        term.write(string.rep("-", 51))
        term.setCursorPos(1, 19)
        term.clearLine()
        updateChat()
        term.write("Sending...")
        if #message > 0  then
            updateChat()
            rawChats = firewolf.query("chat", {message = message, user = username, pass = password})
            updateChat()
        end
    end
end

term.clear()
parallel.waitForAny(chatUpdateLoop, readInput)