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60 lines
2.1 KiB
Go
60 lines
2.1 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package warning
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import (
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"context"
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)
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// The key type is unexported to prevent collisions
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type key int
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const (
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// auditAnnotationsKey is the context key for the audit annotations.
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warningRecorderKey key = iota
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)
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// Recorder provides a method for recording warnings
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type Recorder interface {
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// AddWarning adds the specified warning to the response.
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// agent must be valid UTF-8, and must not contain spaces, quotes, backslashes, or control characters.
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// text must be valid UTF-8, and must not contain control characters.
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AddWarning(agent, text string)
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}
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// WithWarningRecorder returns a new context that wraps the provided context and contains the provided Recorder implementation.
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// The returned context can be passed to AddWarning().
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func WithWarningRecorder(ctx context.Context, recorder Recorder) context.Context {
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return context.WithValue(ctx, warningRecorderKey, recorder)
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}
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func warningRecorderFrom(ctx context.Context) (Recorder, bool) {
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recorder, ok := ctx.Value(warningRecorderKey).(Recorder)
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return recorder, ok
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}
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// AddWarning records a warning for the specified agent and text to the Recorder added to the provided context using WithWarningRecorder().
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// If no Recorder exists in the provided context, this is a no-op.
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// agent must be valid UTF-8, and must not contain spaces, quotes, backslashes, or control characters.
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// text must be valid UTF-8, and must not contain control characters.
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func AddWarning(ctx context.Context, agent string, text string) {
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recorder, ok := warningRecorderFrom(ctx)
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if !ok {
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return
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}
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recorder.AddWarning(agent, text)
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}
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