【界面UI】弹窗队列：连续弹窗的排队与合并

DialogQueue = { list = {}, showing = false }
function DialogQueue.push(dialog)
    for _, d in ipairs(DialogQueue.list) do
        if d.mergeKey and d.mergeKey == dialog.mergeKey then
            d.count = (d.count or 1) + 1
            return
        end
    end
    dialog.priority = dialog.priority or 5
    table.insert(DialogQueue.list, dialog)
    table.sort(DialogQueue.list, function(a, b)
        return a.priority < b.priority
    end)
    DialogQueue.pump()
end

function DialogQueue.pump()
    if DialogQueue.showing then return end
    local next = table.remove(DialogQueue.list, 1)
    if not next then return end
    DialogQueue.showing = true
    DialogRender(next, function()
        DialogQueue.showing = false
        DialogQueue.pump()
    end)
end