move funcs from cmd/rel.go to cmd/root.go

src/cmd/root.go

@@ -1,6 +1,7 @@
 package cmd
 
 import (
+	"axolotl/models"
 	"axolotl/service"
 	"fmt"
 	"os"
@@ -84,3 +85,22 @@ func registerAliasCommands() {
 		})
 	}
 }
+
+// parseRelInput parses a rel string into a RelInput.
+//
+// Formats:
+//   - "prefix::value"  → property rel with no target (tag)
+//   - "relname:target" → edge rel with a target node
+//   - "tagname"        → simple label rel with no target (alias for --tag)
+func parseRelInput(s string) (service.RelInput, error) {
+	if strings.Contains(s, "::") {
+		// Property: name::value — no target node.
+		return service.RelInput{Type: models.RelType(s), Target: ""}, nil
+	}
+	if idx := strings.Index(s, ":"); idx >= 0 {
+		// Edge rel: relname:target.
+		return service.RelInput{Type: models.RelType(s[:idx]), Target: s[idx+1:]}, nil
+	}
+	// Simple label tag — no target node.
+	return service.RelInput{Type: models.RelType(s), Target: ""}, nil
+}