55 lines
1.1 KiB
Go
55 lines
1.1 KiB
Go
package subscription
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import (
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"context"
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"log"
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"os"
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"time"
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)
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// Starts subscription checker
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func Monitor(ctx context.Context) context.Context {
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check := func(ctx context.Context) bool {
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log.Println("Validating subscription")
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if err := Check(ctx); err != nil {
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log.Printf("Subscription could not be validated, reason: %v", err)
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return false
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} else {
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log.Println("Subscription validated")
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}
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return true
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}
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if !check(ctx) {
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// Initial subscription check failed,
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// Just exit.
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os.Exit(1)
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}
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// Initialize new context with cancellation we'll return this context and use it from this point on so that we make
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// a clean exist in case subscription checking fails
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ctx, cancel := context.WithCancel(ctx)
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go func() {
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// Validate subscription key every 24h ours (from the last start of the service)
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t := time.NewTicker(time.Hour * 24)
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defer t.Stop()
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for {
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select {
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case <-t.C:
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// Check the subscription again and call cancel on context
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if !check(ctx) {
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cancel()
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os.Exit(1)
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}
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case <-ctx.Done():
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return
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}
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}
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}()
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return ctx
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}
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