lua/lua/gmod_integration/server/sv_filtrers.lua

local function filterMessage(reason)
    local Message = {}
    table.insert(Message, "----------------------------------------")
    table.insert(Message, gmInte.getTranslation("filter.ds.1", "You cannot join this server"))
    table.insert(Message, "")
    table.insert(Message, gmInte.getTranslation("filter.ds.2", "Reason: {1}", reason && reason || gmInte.getTranslation("filter.none", "none")))
    if gmInte.config.supportLink && gmInte.config.supportLink != "" then table.insert(Message, gmInte.getTranslation("filter.ds.3", "Help URL: {1}", gmInte.config.supportLink)) end
    table.insert(Message, "")
    table.insert(Message, gmInte.getTranslation("filter.ds.4", "Have a nice day"))
    table.insert(Message, "----------------------------------------")
    table.insert(Message, gmInte.getTranslation("filter.ds.5", "Service provided by Gmod Integration"))
    for k, v in ipairs(Message) do
        Message[k] = "\n" .. v
    end
    return table.concat(Message)
end

local function checkBanStatus(banStatus)
    if gmInte.config.filterOnBan && banStatus then return false end
    return true
end

local function checkDiscordBanStatus(banStatus)
    if gmInte.config.syncBan && banStatus then return false end
    return true
end

local function checkPlayerFilter(code, body, data)
    if !body then return end
    if data.rank && gmInte.config.adminRank[data.rank] then return end
    if gmInte.config.maintenance && !body.bypassMaintenance && !body.discordAdmin then game.KickID(data.networkid, filterMessage(gmInte.getTranslation("filter.maintenance", "The server is currently under maintenance and you are not whitelisted."))) end
    if !checkBanStatus(body.ban) then game.KickID(data.networkid, filterMessage(gmInte.getTranslation("filter.ban", "You are banned from this server."))) end
    if !checkDiscordBanStatus(body.discord_ban) then game.KickID(data.networkid, filterMessage(gmInte.getTranslation("filter.discord_ban", "You are banned from our discord server."))) end
end

local function checkPlayerIsLink(code, body, data)
    if !body then return end
    if !body.discordID then game.KickID(data.networkid, filterMessage(gmInte.getTranslation("filter.link", "You need to link your discord account before joining, verify your account on {1}", "https://gmod-integration.com/account"))) end
end

local cachePlayerFilter = {}
local function playerFilter(data)
    if data.bot == 1 then return end
    data.steamID64 = util.SteamIDTo64(data.networkid)
    cachePlayerFilter[data.steamID64] = cachePlayerFilter[data.steamID64] || {}
    local cachedData = cachePlayerFilter[data.steamID64]
    // Check if player is banned
    if !cachedData || !cachedData.filterData || cachedData.filterData.curTime + 30 < CurTime() then
        gmInte.http.get("/servers/:serverID/players/" .. data.steamID64, function(code, body)
            cachePlayerFilter[data.steamID64].filterData = {
                ["code"] = code,
                ["body"] = body,
                ["curTime"] = CurTime()
            }

            checkPlayerFilter(code, body, data)
        end, function(code, body) if gmInte.config.maintenance then game.KickID(data.networkid, filterMessage(gmInte.getTranslation("filter.maintenance", "The server is currently under maintenance and you are not whitelisted."))) end end)
    else
        checkPlayerFilter(cachedData.filterData.code, cachedData.filterData.body, data)
    end

    // Check if player has a discord account linked
    if gmInte.config.forcePlayerLink && gmInte.config.verifyOnJoin then
        if !cachedData || !cachedData.isLinkData || cachedData.isLinkData.curTime + 30 < CurTime() then
            gmInte.http.get("/users?steamID64=" .. data.steamID64, function(code, body)
                cachePlayerFilter[data.steamID64].isLinkData = {
                    ["code"] = code,
                    ["body"] = body,
                    ["curTime"] = CurTime()
                }

                checkPlayerIsLink(code, body, data)
            end, function(code, body) if code == 404 then game.KickID(data.networkid, filterMessage(gmInte.getTranslation("filter.link", "You need to link your discord account before joining, verify your account on {1}", "https://gmod-integration.com/account"))) end end)
        else
            checkPlayerIsLink(cachedData.isLinkData.code, cachedData.isLinkData.body, data)
        end
    end
end

gameevent.Listen("player_connect")
hook.Add("player_connect", "gmInte:Player:Connect:Filter", function(data) playerFilter(data) end)