1// Package auth contains helpers for managing identities within the GraphQL API.
 2package auth
 3
 4import (
 5	"context"
 6
 7	"github.com/MichaelMure/git-bug/cache"
 8	"github.com/MichaelMure/git-bug/entity"
 9)
10
11// identityCtxKey is a unique context key, accessible only in this package.
12var identityCtxKey = &struct{}{}
13
14// CtxWithUser attaches an Identity to a context.
15func CtxWithUser(ctx context.Context, userId entity.Id) context.Context {
16	return context.WithValue(ctx, identityCtxKey, userId)
17}
18
19// UserFromCtx retrieves an IdentityCache from the context.
20// If there is no identity in the context, ErrNotAuthenticated is returned.
21// If an error occurs while resolving the identity (e.g. I/O error), then it will be returned.
22func UserFromCtx(ctx context.Context, r *cache.RepoCache) (*cache.IdentityCache, error) {
23	id, ok := ctx.Value(identityCtxKey).(entity.Id)
24	if !ok {
25		return nil, ErrNotAuthenticated
26	}
27	return r.Identities().Resolve(id)
28}