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3d28aa19cb
The json/v2 prototype is still in flux and the API can/will change. Statically enforce that types implementing the v2 methods satisfy the correct interface so that changes to the signature can be statically detected by the compiler. Updates tailscale/corp#791 Signed-off-by: Joe Tsai <joetsai@digital-static.net>
106 lines
2.4 KiB
Go
106 lines
2.4 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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package setting
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import (
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jsonv2 "github.com/go-json-experiment/json"
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"github.com/go-json-experiment/json/jsontext"
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"tailscale.com/types/opt"
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)
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// Summary is an immutable [PolicyScope] and [Origin].
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type Summary struct {
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data summary
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}
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type summary struct {
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Scope opt.Value[PolicyScope] `json:",omitzero"`
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Origin opt.Value[Origin] `json:",omitzero"`
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}
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// SummaryWith returns a [Summary] with the specified options.
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func SummaryWith(opts ...SummaryOption) Summary {
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var summary Summary
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for _, o := range opts {
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o.applySummaryOption(&summary)
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}
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return summary
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}
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// IsEmpty reports whether s is empty.
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func (s Summary) IsEmpty() bool {
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return s == Summary{}
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}
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// Scope reports the [PolicyScope] in s.
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func (s Summary) Scope() opt.Value[PolicyScope] {
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return s.data.Scope
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}
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// Origin reports the [Origin] in s.
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func (s Summary) Origin() opt.Value[Origin] {
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return s.data.Origin
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}
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// String implements [fmt.Stringer].
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func (s Summary) String() string {
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if s.IsEmpty() {
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return "{Empty}"
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}
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if origin, ok := s.data.Origin.GetOk(); ok {
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return origin.String()
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}
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return s.data.Scope.String()
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}
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var (
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_ jsonv2.MarshalerTo = (*Summary)(nil)
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_ jsonv2.UnmarshalerFrom = (*Summary)(nil)
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)
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// MarshalJSONTo implements [jsonv2.MarshalerTo].
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func (s Summary) MarshalJSONTo(out *jsontext.Encoder) error {
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return jsonv2.MarshalEncode(out, &s.data)
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}
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// UnmarshalJSONFrom implements [jsonv2.UnmarshalerFrom].
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func (s *Summary) UnmarshalJSONFrom(in *jsontext.Decoder) error {
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return jsonv2.UnmarshalDecode(in, &s.data)
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}
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// MarshalJSON implements [json.Marshaler].
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func (s Summary) MarshalJSON() ([]byte, error) {
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return jsonv2.Marshal(s) // uses MarshalJSONTo
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}
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// UnmarshalJSON implements [json.Unmarshaler].
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func (s *Summary) UnmarshalJSON(b []byte) error {
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return jsonv2.Unmarshal(b, s) // uses UnmarshalJSONFrom
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}
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// SummaryOption is an option that configures [Summary]
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// The following are allowed options:
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//
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// - [Summary]
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// - [PolicyScope]
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// - [Origin]
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type SummaryOption interface {
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applySummaryOption(summary *Summary)
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}
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func (s PolicyScope) applySummaryOption(summary *Summary) {
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summary.data.Scope.Set(s)
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}
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func (o Origin) applySummaryOption(summary *Summary) {
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summary.data.Origin.Set(o)
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if !summary.data.Scope.IsSet() {
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summary.data.Scope.Set(o.Scope())
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}
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}
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func (s Summary) applySummaryOption(summary *Summary) {
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*summary = s
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}
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