mirror of
https://github.com/AdguardTeam/AdGuardDNS.git
synced 2026-04-24 07:56:54 -04:00
73 lines
2.0 KiB
Go
73 lines
2.0 KiB
Go
package cmd
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import (
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"fmt"
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"github.com/AdguardTeam/golibs/timeutil"
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"golang.org/x/exp/constraints"
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)
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// Error Helpers
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// check is a simple error-checking helper. It must only be used within Main.
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func check(err error) {
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if err != nil {
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panic(err)
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}
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}
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// coalesceError returns the first non-nil error. It is named after function
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// COALESCE in SQL. If all errors are nil, it returns nil.
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//
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// TODO(a.garipov): Consider a similar helper to group errors together to show
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// as many errors as possible.
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//
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// TODO(a.garipov): Think of ways to merge with [aghalg.Coalesce] in AdGuard
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// Home.
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func coalesceError(errors ...error) (res error) {
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for _, err := range errors {
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if err != nil {
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return err
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}
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}
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return nil
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}
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// numberOrDuration is the constraint for integer types along with
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// timeutil.Duration.
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type numberOrDuration interface {
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constraints.Integer | timeutil.Duration
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}
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// validatePositive returns an error if v is not a positive number. prop is the
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// name of the property being checked, used for error messages.
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func validatePositive[T numberOrDuration](prop string, v T) (err error) {
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if d, ok := any(v).(timeutil.Duration); ok && d.Duration <= 0 {
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return newMustBePositiveError(prop, v)
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}
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return nil
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}
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// newMustBePositiveError returns an error about the value that must be positive
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// but isn't. prop is the name of the property to mention in the error message.
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func newMustBePositiveError[T numberOrDuration](prop string, v T) (err error) {
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if s, ok := any(v).(fmt.Stringer); ok {
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return fmt.Errorf("%s must be positive, got %s", prop, s)
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}
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return fmt.Errorf("%s must be positive, got %d", prop, v)
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}
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// newMustBeNonNegativeError returns an error about the value that must be
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// non-negative but isn't. prop is the name of the property to mention in the
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// error message.
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func newMustBeNonNegativeError[T numberOrDuration](prop string, v T) (err error) {
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if s, ok := any(v).(fmt.Stringer); ok {
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return fmt.Errorf("%s must be non-negative, got %s", prop, s)
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}
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return fmt.Errorf("%s must be non-negative, got %d", prop, v)
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}
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