【进阶实战】名次预览：预计名次与奖励的展示封装

local REWARDS = { { min = 1, gold = 5 }, { min = 10, gold = 2 }, { min = 50, gold = 1 } }
local function previewRank(actor, myPts)
    actor = getplayvar(actor, "HUMAN", "x") and actor or actor
    local board = tostring(getsysvar("WarPtsBoard") or "")
    local higher = 0
    for e in string.gmatch(board, "[^|]+") do
        local pts = tonumber(string.match(e, ":(%d+)$") or "0")
        if pts > myPts then
            higher = higher + 1
        end
    end
    local rank = higher + 1
    local reward = 0
    for _, r in ipairs(REWARDS) do
        if rank <= r.min then
            reward = r.gold
            break
        end
    end
    sendmsg(actor, 1, "当前战功预计第 " .. rank .. " 名，奖励 " .. reward .. " 根金条。")
    return rank, reward
end

local function rewardOf(rank)
    for _, r in ipairs(REWARDS) do
        if rank <= r.min then
            return r.gold
        end
    end
    return 0
end