【进阶实战】变更审批：高危操作的审批链封装

local approvals = {}
local function submitChange(kind, detail, applicant)
    local id = "CH" .. os.time()
    approvals[id] = { kind = kind, detail = detail, applicant = applicant,
        status = "pending", level1 = "", level2 = "", ts = os.time() }
    sendmsg(nil, 1, "变更单 " .. id .. " 已提交，等待审批。")
    return id
end
local function approve(id, level, approver)
    local a = approvals[id]
    if a == nil or a.status ~= "pending" then
        return false
    end
    if approver == a.applicant then
        print("审批人不得为申请人")
        return false
    end
    if level == 1 then
        a.level1 = approver
        print("一级审批通过，待运营复核")
    else
        a.level2 = approver
        a.status = "approved"
        print("二级审批通过，变更单 " .. id .. " 可执行")
    end
    return true
end
local function executeChange(id, execFn)
    local a = approvals[id]
    if a == nil or a.status ~= "approved" then
        print("变更单 " .. tostring(id) .. " 未获批准，拒绝执行")
        return false
    end
    execFn()
    a.status = "executed"
    return true
end

local id = submitChange("drop_rate", "祖玛教主爆率 1/5000 调至 1/4500", "策划小李")
approve(id, 1, "主管老王")
approve(id, 2, "运营老张")
executeChange(id, function()
    print("爆率调整生效")
end
)