【玩法策划】灵兽交换所：借鉴宝可梦图鉴的交换登记玩法

local pending = {}
function offerSwap(actor, swapId)
    local player = class(actor)
    local deal = pending[swapId]
    if deal == nil then return end
    deal.confirmed[player:GetName()] = true
    if deal.confirmed[deal.a] and deal.confirmed[deal.b] then
        local pa = getplayerbyname(deal.a)
        local pb = getplayerbyname(deal.b)
        if pa ~= nil and pb ~= nil and isplayer(pa) and isplayer(pb) then
            giveitem(pa, deal.beastB, 1)
            giveitem(pb, deal.beastA, 1)
            registerDex(deal.a, deal.beastB)
            registerDex(deal.b, deal.beastA)
        end
        pending[swapId] = nil
    end
end

local dex = {}
local function registerDex(playerName, beast)
    local key = "DEX_" .. playerName .. "_" .. beast
    if dex[key] ~= true then
        dex[key] = true
        giveitem(playerName, "交换纪念徽章", 1)
    end
end