61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
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package director
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import (
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"context"
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"forge.cadoles.com/cadoles/bouncer/internal/store"
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"github.com/pkg/errors"
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)
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type contextKey string
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const (
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contextKeyProxy contextKey = "proxy"
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contextKeyLayers contextKey = "layers"
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)
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var (
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errContextKeyNotFound = errors.New("context key not found")
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errUnexpectedContextValue = errors.New("unexpected context value")
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)
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func withProxy(ctx context.Context, proxy *store.Proxy) context.Context {
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return context.WithValue(ctx, contextKeyProxy, proxy)
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}
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func ctxProxy(ctx context.Context) (*store.Proxy, error) {
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proxy, err := ctxValue[*store.Proxy](ctx, contextKeyProxy)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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return proxy, nil
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}
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func withLayers(ctx context.Context, layers []*store.Layer) context.Context {
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return context.WithValue(ctx, contextKeyLayers, layers)
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}
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func ctxLayers(ctx context.Context) ([]*store.Layer, error) {
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layers, err := ctxValue[[]*store.Layer](ctx, contextKeyLayers)
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if err != nil {
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return nil, errors.WithStack(err)
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}
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return layers, nil
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}
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func ctxValue[T any](ctx context.Context, key contextKey) (T, error) {
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raw := ctx.Value(key)
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if raw == nil {
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return *new(T), errors.WithStack(errContextKeyNotFound)
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}
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value, ok := raw.(T)
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if !ok {
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return *new(T), errors.WithStack(errUnexpectedContextValue)
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}
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return value, nil
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}
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