【后端接口】坐骑喂养：坐骑饱食度与加成接口

-- 坐骑喂养：饱食度增减
local player = class(actor)
local FEED_ITEMS = {["优质草料"] = 40, ["普通草料"] = 20}
local SAT_MAX = 100
local function feedMount(player, itemName)
    local gain = FEED_ITEMS[itemName]
    if gain == nil then
        sendmsg(player, 1, 0, "该道具不能喂坐骑。")
        return
    end
    if not checkitemw(player, itemName, 1) then
        sendmsg(player, 1, 0, "背包里没有" .. itemName .. "。")
        return
    end
    local sat = tonumber(getplayvar(player, "HUMAN", "MountSat") or 0)
    local add = math.min(gain, SAT_MAX - sat)
    if add <= 0 then
        sendmsg(player, 1, 0, "坐骑已经很饱了。")
        return
    end
    takeitem(player, itemName, 1)
    setplayvar(player, "HUMAN", "MountSat", sat + add, true)
    sendmsg(player, 1, 0, "喂养成功，饱食度 " .. sat + add .. "/" .. SAT_MAX .. "。")
end

-- 坐骑加成：分档联动
local player = class(actor)
local function mountState(player)
    local sat = tonumber(getplayvar(player, "HUMAN", "MountSat") or 0)
    if sat >= 70 then
        return "fast", "移速加成全额生效"
    elseif sat >= 30 then
        return "normal", "移速加成减半"
    end
    return "hungry", "坐骑饥饿，拒绝出战"
end
local function tryRide(player)
    local state, tip = mountState(player)
    if state == "hungry" then
        sendmsg(player, 1, 0, tip .. "，请先喂些草料。")
        return
    end
    sendmsg(player, 1, 0, "翻身上马！" .. tip)
end