1 files changed, 66 insertions, 0 deletions
diff --git a/refstore/files/update_validate.go b/refstore/files/update_validate.go
new file mode 100644
index 00000000..9449fda5
--- /dev/null
+++ b/refstore/files/update_validate.go
@@ -0,0 +1,66 @@
+package files
+
+import (
+	"fmt"
+	"strings"
+
+	"codeberg.org/lindenii/furgit/objectid"
+	"codeberg.org/lindenii/furgit/ref/refname"
+	"codeberg.org/lindenii/furgit/refstore"
+)
+
+func (executor *refUpdateExecutor) validateQueuedUpdate(op queuedUpdate) error {
+	if op.name == "" {
+		return wrapUpdateError(op.name, &refstore.InvalidNameError{Err: fmt.Errorf("empty reference name")})
+	}
+
+	switch op.kind {
+	case updateCreate, updateReplace:
+		err := refname.ValidateUpdateName(op.name, true)
+		if err != nil {
+			return wrapUpdateError(op.name, &refstore.InvalidNameError{Err: err})
+		}
+
+		if op.newID.Size() == 0 {
+			return wrapUpdateError(op.name, &refstore.InvalidValueError{Err: objectid.ErrInvalidAlgorithm})
+		}
+	case updateDelete, updateVerify:
+		err := refname.ValidateUpdateName(op.name, false)
+		if err != nil {
+			return wrapUpdateError(op.name, &refstore.InvalidNameError{Err: err})
+		}
+
+		if op.oldID.Size() == 0 {
+			return wrapUpdateError(op.name, &refstore.InvalidValueError{Err: objectid.ErrInvalidAlgorithm})
+		}
+	case updateCreateSymbolic, updateReplaceSymbolic:
+		err := refname.ValidateUpdateName(op.name, true)
+		if err != nil {
+			return wrapUpdateError(op.name, &refstore.InvalidNameError{Err: err})
+		}
+
+		if strings.TrimSpace(op.newTarget) == "" {
+			return wrapUpdateError(op.name, &refstore.InvalidValueError{Err: fmt.Errorf("empty symbolic target")})
+		}
+
+		err = refname.ValidateSymbolicTarget(op.name, strings.TrimSpace(op.newTarget))
+		if err != nil {
+			return wrapUpdateError(op.name, &refstore.InvalidValueError{Err: err})
+		}
+	case updateDeleteSymbolic, updateVerifySymbolic:
+		err := refname.ValidateUpdateName(op.name, false)
+		if err != nil {
+			return wrapUpdateError(op.name, &refstore.InvalidNameError{Err: err})
+		}
+	default:
+		return fmt.Errorf("refstore/files: unsupported update operation %d", op.kind)
+	}
+
+	if op.kind == updateReplaceSymbolic || op.kind == updateDeleteSymbolic || op.kind == updateVerifySymbolic {
+		if strings.TrimSpace(op.oldTarget) == "" {
+			return wrapUpdateError(op.name, &refstore.InvalidValueError{Err: fmt.Errorf("empty symbolic old target")})
+		}
+	}
+
+	return nil
+}