afkarxyz
45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
package backend
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import (
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"fmt"
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"math"
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)
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const (
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previewMaxSeconds = 35
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previewExpectedMinSeconds = 60
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largeMismatchMinExpected = 90
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minAllowedDurationDiff = 15
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durationDiffRatio = 0.25
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)
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func ValidateDownloadedTrackDuration(filePath string, expectedSeconds int) (bool, error) {
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if filePath == "" || expectedSeconds <= 0 {
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return false, nil
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}
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actualDuration, err := GetAudioDuration(filePath)
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if err != nil || actualDuration <= 0 {
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return false, nil
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}
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actualSeconds := int(math.Round(actualDuration))
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if actualSeconds <= 0 {
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return false, nil
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}
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if expectedSeconds >= previewExpectedMinSeconds && actualSeconds <= previewMaxSeconds {
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return true, fmt.Errorf("detected preview/sample download: file is %ds, expected about %ds. file was removed", actualSeconds, expectedSeconds)
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}
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if expectedSeconds >= largeMismatchMinExpected {
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allowedDiff := int(math.Max(minAllowedDurationDiff, math.Round(float64(expectedSeconds)*durationDiffRatio)))
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diff := int(math.Abs(float64(actualSeconds - expectedSeconds)))
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if diff > allowedDiff {
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return true, fmt.Errorf("downloaded file duration mismatch: file is %ds, expected about %ds. file was removed", actualSeconds, expectedSeconds)
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}
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}
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return true, nil
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}
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