Adding upstream version 0.28.1.

Signed-off-by: Daniel Baumann <daniel@debian.org>

core/validators/validators.go

@@ -0,0 +1,40 @@
+// Package validators implements some common custom PocketBase validators.
+package validators
+
+import (
+	"errors"
+	"maps"
+
+	validation "github.com/go-ozzo/ozzo-validation/v4"
+)
+
+var ErrUnsupportedValueType = validation.NewError("validation_unsupported_value_type", "Invalid or unsupported value type.")
+
+// JoinValidationErrors attempts to join the provided [validation.Errors] arguments.
+//
+// If only one of the arguments is [validation.Errors], it returns the first non-empty [validation.Errors].
+//
+// If both arguments are not [validation.Errors] then it returns a combined [errors.Join] error.
+func JoinValidationErrors(errA, errB error) error {
+	vErrA, okA := errA.(validation.Errors)
+	vErrB, okB := errB.(validation.Errors)
+
+	// merge
+	if okA && okB {
+		result := maps.Clone(vErrA)
+		maps.Copy(result, vErrB)
+		if len(result) > 0 {
+			return result
+		}
+	}
+
+	if okA && len(vErrA) > 0 {
+		return vErrA
+	}
+
+	if okB && len(vErrB) > 0 {
+		return vErrB
+	}
+
+	return errors.Join(errA, errB)
+}