Discord RPC for Morrowind

local discordRPC = require("libs.discordRPC")

-- All script overwrites need to create and return one of these.
local this = LuaScript.new()

--[[

    This is a proof of concept of how to provide DLL-style extensions to Morrowind.
    We do this by using LuaJIT's FFI to connect to a precompiled DLL file.

    In this example we will be interfacing with Discord's Rich Presence API to
    show the player's name, race, class, level, and current location to people who
    click on the user's name in Discord.

    The interface to the discord-rpc.dll library is pfirsich's MIT-licensed
    lua-discord-RPC libary, which comes bundled with this download. Visit his
    project here: https://github.com/pfirsich/lua-discordRPC

--]]

local presence = {
    details = "In main menu",
    largeImageKey = "default",
    startTimestamp = 0,
}

local updateClock

function updatePresenceDetails()
    -- Set the details to the player's name/class/level.
    local playerRef = tes3.getPlayerRef()
    presence.details = string.format( "%s (%s, %s %d)", playerRef.object.name, playerRef.object.race.name, playerRef.object.class.name, playerRef.object.level )

    -- Set the state to the player cell.
    local playerCell = tes3.getPlayerCell()
    if (playerCell) then
        presence.state = playerCell.id
    else
        presence.state = "Exploring the unknown!"
    end
end

-- This function is called once the script has been recognized, when esm/esp files
-- are being loaded by the game. We will use this to initialize the connection and
-- set start timestamps.
function this:initialized()
    discordRPC.initialize("428347126184017920", true)

    presence.startTimestamp = os.time(os.date("*t"))

    updateClock = os.clock()
end

-- This function is called every time that the script would normally execute,
-- instead of the mwscript that should be run. Here we will update presence info
-- assuming that more than 30 seconds have passed since the last update.
function this:execute()
    -- Only update presence once every 30 seconds, or if we haven't updated it yet.
    local timeDelta = os.clock() - updateClock
    if ( timeDelta > 30 or presence.state == nil ) then
        updatePresenceDetails()
        discordRPC.updatePresence(presence)
        updateClock = os.clock()
    end

    discordRPC.runCallbacks()
end

-- TODO: When we have our own quit event, we can provide a shutdown call.
-- But, the discordRPC API handles this for us anyway on garbage collection.
-- function this:someFutureQuitEvent()
--     discordRPC.shutdown()
-- end

function discordRPC.ready()
    print("[discord_rpc]: Discord ready.")

    -- When Discord first reports that it is ready, update presence. We very likely
    -- won't have interesting data at this point.
    discordRPC.updatePresence(presence)
end

function discordRPC.disconnected(errorCode, message)
    print(string.format("[discord_rpc]: Discord disconnected (%d: %s)", errorCode, message))
end

function discordRPC.errored(errorCode, message)
    print(string.format("[discord_rpc]: Discord error (%d: %s)", errorCode, message))
end

return this