27 lines
664 B
Go
27 lines
664 B
Go
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package utils
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import (
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"cmp"
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"sync"
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"time"
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"golang.org/x/time/rate"
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)
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// Limiter is a rate limiter that allows a function to be executed at most once per ID and per interval.
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type Limiter struct {
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Interval time.Duration
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sm sync.Map
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}
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// Do executes the provided function `f` if the rate limiter for the given `id` allows it.
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// It uses the interval specified in the Limiter struct or defaults to 1 minute if not set.
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func (m *Limiter) Do(id string, f func()) {
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interval := cmp.Or(
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m.Interval,
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time.Minute, // Default every 1 minute
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)
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limiter, _ := m.sm.LoadOrStore(id, &rate.Sometimes{Interval: interval})
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limiter.(*rate.Sometimes).Do(f)
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}
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