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Reject saves with 2 days difference (#29)
* Reject saves with 2 days difference * improved timestamp checks * chore: Refactor timestamp checks for saving system data * Refactor timestamp checks for saving system data
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@ -21,6 +21,8 @@ import (
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"bytes"
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"encoding/gob"
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"errors"
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"fmt"
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"time"
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"github.com/pagefaultgames/rogueserver/defs"
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)
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@ -71,8 +73,29 @@ func ReadSystemSaveData(uuid []byte) (defs.SystemSaveData, error) {
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func StoreSystemSaveData(uuid []byte, data defs.SystemSaveData) error {
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systemData, err := ReadSystemSaveData(uuid)
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if err == nil && systemData.Timestamp > data.Timestamp {
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return errors.New("attempted to save an older system save")
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currentTime := time.Now()
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futureTime := currentTime.Add(time.Hour * 24).UnixMilli()
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pastTime := currentTime.Add(-time.Hour * 24).UnixMilli()
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if err == nil { // system save exists
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// Check if the new data timestamp is in the past against the system save but only if the system save is not past 24 hours from now
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if systemData.Timestamp > data.Timestamp && systemData.Timestamp < int(futureTime) {
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// Error if the new data timestamp is older than the current system save timestamp
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return fmt.Errorf("attempted to save an older system save from %d when the current system save is from %d",
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data.Timestamp,
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systemData.Timestamp)
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}
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}
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// Check if the data.Timestamp is too far in the future
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if data.Timestamp > int(futureTime) {
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return fmt.Errorf("attempted to save a system save in the future from %d", data.Timestamp)
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}
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// Check if the data.Timestamp is too far in the past
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if data.Timestamp < int(pastTime) {
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return fmt.Errorf("attempted to save a system save in the past from %d", data.Timestamp)
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}
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var buf bytes.Buffer
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