feat(server): add project sharing access control

server/internal/modules/sharing/context.go

@@ -0,0 +1,30 @@
+package sharing
+
+import "context"
+
+type actorContextKey struct{}
+type accessContextKey struct{}
+
+func ContextWithActor(ctx context.Context, actor Actor) context.Context {
+	return context.WithValue(ctx, actorContextKey{}, actor)
+}
+
+func ActorFromContext(ctx context.Context) Actor {
+	if ctx == nil {
+		return Actor{}
+	}
+	actor, _ := ctx.Value(actorContextKey{}).(Actor)
+	return actor
+}
+
+func ContextWithAccess(ctx context.Context, access Access) context.Context {
+	return context.WithValue(ctx, accessContextKey{}, access)
+}
+
+func AccessFromContext(ctx context.Context) (Access, bool) {
+	if ctx == nil {
+		return Access{}, false
+	}
+	access, ok := ctx.Value(accessContextKey{}).(Access)
+	return access, ok
+}