add users logic

coordinator/internal/usecase/ownership.go

@@ -0,0 +1,39 @@
+package usecase
+
+import (
+	"context"
+
+	"github.com/google/uuid"
+
+	"github.com/emil28092005/SciMesh/coordinator/internal/authctx"
+	"github.com/emil28092005/SciMesh/coordinator/internal/domain"
+)
+
+// ownerFromContext returns the authenticated user id to stamp on a new job, or
+// nil when the request was not authenticated as a user — worker or legacy
+// traffic, or user-JWT auth disabled. A nil owner is stored as NULL.
+func ownerFromContext(ctx context.Context) *uuid.UUID {
+	if r, ok := authctx.From(ctx); ok {
+		id := r.UserID
+		return &id
+	}
+	return nil
+}
+
+// authorizeJobAccess enforces that a non-admin user may only act on their own
+// job. It returns ErrJobNotFound — not a 403 — on a mismatch, so the response
+// never reveals that another user's job exists.
+//
+// Requests with no authenticated user (worker/legacy traffic, or JWT auth
+// disabled) are not restricted here: the shared service token already gated
+// them, and worker endpoints legitimately operate across all jobs.
+func authorizeJobAccess(ctx context.Context, job *domain.Job) error {
+	r, ok := authctx.From(ctx)
+	if !ok || r.IsAdmin() {
+		return nil
+	}
+	if job.OwnerID == nil || *job.OwnerID != r.UserID {
+		return domain.ErrJobNotFound
+	}
+	return nil
+}