42 lines
1.7 KiB
Go
42 lines
1.7 KiB
Go
 
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package processor
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import (
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"fmt"
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"time"
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"apskel-pos-be/internal/entities"
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)
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// ValidateResult checks a result against a game's result_rules (docs/rfc-enakgame.md
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// §7.2 step 5) and returns why it is not believable, or nil when it is. A rule left
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// out does not apply, so a game without result_rules accepts every result.
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//
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// A failed result is not an error: the session completes, earns nothing and is
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// flagged, with these reasons in its reward_breakdown.
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func ValidateResult(rules entities.GameResultRules, result SessionResult, startedAt, submittedAt time.Time) []string {
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var reasons []string
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elapsed := submittedAt.Sub(startedAt).Seconds()
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if rules.MinDurationSeconds != nil && elapsed < float64(*rules.MinDurationSeconds) {
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reasons = append(reasons, fmt.Sprintf("played %.0f seconds, under the minimum of %d", elapsed, *rules.MinDurationSeconds))
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}
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if result.Score != nil {
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score := *result.Score
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if score < 0 {
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reasons = append(reasons, "score cannot be negative")
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}
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if rules.MaxScore != nil && score > *rules.MaxScore {
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reasons = append(reasons, fmt.Sprintf("score %d is above the maximum of %d", score, *rules.MaxScore))
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}
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if rules.MaxScorePerSecond != nil && score > 0 {
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// A score with no time played at all is never believable.
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if elapsed <= 0 || float64(score)/elapsed > *rules.MaxScorePerSecond {
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reasons = append(reasons, fmt.Sprintf("score %d in %.0f seconds is above %g per second", score, elapsed, *rules.MaxScorePerSecond))
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}
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}
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}
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if result.Outcome != nil && len(rules.Outcomes) > 0 && !containsString(rules.Outcomes, *result.Outcome) {
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reasons = append(reasons, fmt.Sprintf("unknown outcome %q", *result.Outcome))
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}
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return reasons
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}
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