【引擎触发】addfriendrequest：加好友前的校验

---addfriendrequest: 加好友前触发
function addfriendrequest(actor, targetName)
    local player = class(actor)
    if not player then return false end
    -- 黑名单拦截：被拉黑的人发不来申请
    if Friend.blacklisted(targetName, actor) then
        sendmsg(actor, 1, "对方当前无法接收申请")
        return false
    end
    -- 频控：单人每小时最多发 10 个申请
    local n = Friend.requestCount(actor)
    if n >= 10 then
        sendmsg(actor, 1, "申请过于频繁，请稍后再试")
        return false
    end
    -- 好友上限：满 100 人先清理
    local cnt = Friend.countOf(targetName)
    if cnt >= 100 then
        sendmsg(actor, 1, "对方好友已满")
        return false
    end
    return true
end

---申请的过期与清理
setontimerex(89, 1800)
function Friend.cleanRequests()
    local now = os.time()
    for id, req in pairs(Friend.pending) do
        if now - req.at > 3 * 86400 then
            Friend.pending[id] = nil
        end
    end
end

---申请的接受与互为好友
function Friend.accept(actor, fromName)
    local player = class(actor)
    if not player then return false end
    Friend.addTwoWay(actor, fromName)
    sendmsg(actor, 1, "与 " .. fromName .. " 成为好友")
    sendmsg(fromName, 1, actor .. " 接受了该好友申请")
    -- 亲密度的起点
    Friend.setIntimacy(actor, fromName, 10)
    return true
end