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43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
package config
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import (
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"fmt"
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"math/rand/v2"
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"strings"
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"github.com/robfig/cron/v3"
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"github.com/photoprism/photoprism/pkg/clean"
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)
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const (
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// ScheduleDaily represents the keyword for daily schedules.
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ScheduleDaily = "daily"
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// ScheduleWeekly represents the keyword for weekly schedules.
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ScheduleWeekly = "weekly"
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)
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// Schedule evaluates a schedule config value and returns it, or an empty string if it is invalid. Cron schedules consist
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// of 5 space separated values: minute, hour, day of month, month and day of week, e.g. "0 12 * * *" for daily at noon.
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func Schedule(s string) string {
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if s == "" {
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return ""
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}
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s = strings.TrimSpace(strings.ToLower(s))
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switch s {
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case ScheduleDaily:
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return fmt.Sprintf("%d %d * * *", rand.IntN(60), rand.IntN(24)) //nolint:gosec // non-cryptographic randomness for scheduling
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case ScheduleWeekly:
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return fmt.Sprintf("%d %d * * 0", rand.IntN(60), rand.IntN(24)) //nolint:gosec // non-cryptographic randomness for scheduling
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}
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// Example: "0 12 * * *" stands for daily at noon.
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if _, err := cron.ParseStandard(s); err != nil {
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log.Warnf("config: invalid schedule %s (%s)", clean.Log(s), err)
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return ""
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}
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return s
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}
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