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44 lines
930 B
Go
44 lines
930 B
Go
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// Package jsonpatch contains utilities for JSON Merge Patch APIs.
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//
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// See https://www.rfc-editor.org/rfc/rfc7396.
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package jsonpatch
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import (
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"bytes"
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"encoding/json"
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"github.com/AdguardTeam/golibs/errors"
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)
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// NonRemovable is a type that prevents JSON null from being used to try and
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// remove a value.
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type NonRemovable[T any] struct {
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Value T
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IsSet bool
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}
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// type check
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var _ json.Unmarshaler = (*NonRemovable[struct{}])(nil)
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// UnmarshalJSON implements the [json.Unmarshaler] interface for *NonRemovable.
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func (v *NonRemovable[T]) UnmarshalJSON(b []byte) (err error) {
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if v == nil {
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return errors.Error("jsonpatch.NonRemovable is nil")
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}
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if bytes.Equal(b, []byte("null")) {
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return errors.Error("property cannot be removed")
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}
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v.IsSet = true
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return json.Unmarshal(b, &v.Value)
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}
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// Set sets ptr if the value has been provided.
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func (v NonRemovable[T]) Set(ptr *T) {
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if v.IsSet {
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*ptr = v.Value
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}
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}
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