【高级技巧】权限矩阵：角色与操作的映射表封装

local MATRIX = {
    admin = { ban = true, sendReward = true, editRate = true },
    ops = { sendReward = true, editRate = false },
    gm = { ban = true, sendReward = false, editRate = false },
}
local function hasPerm(role, op)
    local row = MATRIX[role]
    if row == nil then
        return false
    end
    return row[op] == true
end
local function guardedCall(role, op, fn, ...)
    if not hasPerm(role, op) then
        print("[越权] " .. role .. " 尝试执行 " .. op)
        return false
    end
    return fn(...)
end

local function doBan(role, target)
    guardedCall(role, "ban", function()
        sendmsg(nil, 1, target .. " 已被封禁")
        return true
    end
    )
end
doBan("gm", "捣乱玩家")