lets.chat/chat

term.setCursorPos(1, 10)
center("lets.chat V1.2")
term.setCursorPos(3, 12)
write("Enter a username: ")
local username = read()
local inputColor = colors.orange
local chatColor = colors.white
local rawChats = firewolf.query("chat", {message = username .. " has joined the room"})

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()
                term.write(v)
            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 = "<"..username.."> "..message})
            updateChat()
        end
    end
end

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