context.go

// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package ga4gh

import "context"

type key int

const identityKey key = 0

// NewIdentityContext creates a new context.Conext from ctx that carries
// identity.
func NewIdentityContext(ctx context.Context, identity *Identity) context.Context {
	return context.WithValue(ctx, identityKey, identity)
}

// IdentityFromContext returns the identity associated with ctx.  If there is
// no associated identity then it returns (nil, false).
func IdentityFromContext(ctx context.Context) (*Identity, bool) {
	identity, ok := ctx.Value(identityKey).(*Identity)
	return identity, ok
}