40 lines
1.0 KiB
Go
40 lines
1.0 KiB
Go
package events
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import (
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"fmt"
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"math"
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"bd2server/internal/server/gamedata"
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)
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// Native shops' FreeJewelry prices use total diamonds: free first, then paid.
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// Cash conversion policy and explicitly paid-only prices keep their own rules.
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func (e *Economy) NativePurchaseCosts(cost gamedata.Reward) ([]gamedata.Reward, error) {
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if cost.Count == 0 || cost.Count > math.MaxInt32 {
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return nil, fmt.Errorf("events: invalid native purchase cost")
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}
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if cost.Type != 3 {
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return []gamedata.Reward{cost}, nil
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}
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if cost.ID != 0 {
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return nil, fmt.Errorf("events: diamond cost has an item ID")
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}
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balance := e.wallet.Snapshot()
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free := cost.Count
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if free > balance.FreeJewelry {
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free = balance.FreeJewelry
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}
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paid := cost.Count - free
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if paid > balance.Jewelry {
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return nil, fmt.Errorf("events: insufficient total diamonds")
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}
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var costs []gamedata.Reward
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if free > 0 {
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costs = append(costs, gamedata.Reward{Type: 3, Count: free})
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}
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if paid > 0 {
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costs = append(costs, gamedata.Reward{Type: 2, Count: paid})
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}
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return costs, nil
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}
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