【安全加密】登录地画像：常用城市与陌生城市比对

-- 登录地画像：常用城市集合
local player = class(actor)
local DIST_THRESHOLD = 800
local function isFamiliarCity(player, cityId)
    local familiar = getplayvar(player, "HUMAN", "CityFam_" .. cityId)
    if familiar and tonumber(familiar) >= 2 then
        return true
    end
    return false
end
local function recordLogin(player, cityId)
    local key = "CityFam_" .. cityId
    local cnt = tonumber(getplayvar(player, key) or 0) + 1
    setplayvar(player, key, cnt, true)
    setplayvar(player, "HUMAN", "LastCity", cityId, true)
end

-- 可疑判定：分级响应
local player = class(actor)
local function handleSuspiciousLogin(player, cityId)
    local suspicious = tonumber(getplayvar(player, "HUMAN", "SuspiciousCnt") or 0) + 1
    setplayvar(player, "HUMAN", "SuspiciousCnt", suspicious, true)
    if suspicious >= 2 then
        setplayvar(player, "HUMAN", "TradeLimit", 1, true)
        sendmail("#" .. (getbaseinfo(player, 3) or ""), 8031, "安全提醒",
            "检测到连续异地登录，交易功能已临时限制，请完成安全验证解除。", "")
    else
        sendmsg(player, 1, 0, "检测到格外用城市登录，请注意账号安全。")
    end
end