40 lines
858 B
Go
40 lines
858 B
Go
package config
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import (
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"context"
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"errors"
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)
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type appConfigKey uint8
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const appConfigCtxKey appConfigKey = iota
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// AddToCtx adds the AppConfig to the provided context.
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func (ac *AppConfig) AddToCtx(ctx context.Context) context.Context {
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return context.WithValue(ctx, appConfigCtxKey, ac)
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}
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// MustFromCtx retrieves the AppConfig from the context, or panics if not found.
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func MustFromCtx(ctx context.Context) *AppConfig {
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cfg, err := FromCtx(ctx)
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if err != nil {
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panic(err)
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}
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return cfg
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}
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// FromCtx retrieves the AppConfig from the context.
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func FromCtx(ctx context.Context) (*AppConfig, error) {
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ctxData := ctx.Value(appConfigCtxKey)
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if ctxData == nil {
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return nil, errors.New("no config found in context")
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}
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cfg, ok := ctxData.(*AppConfig)
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if !ok {
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return nil, errors.New("invalid config stored in context")
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}
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return cfg, nil
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}
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