data layer

data-layer/workers/internal/apperr/apperr.go

@@ -0,0 +1,33 @@
+// Package apperr defines AppError, the single error type used across the
+// worker. Job handlers wrap any underlying driver error before returning so
+// river retry/log lines stay consistent with the api service.
+package apperr
+
+import (
+	"errors"
+	"fmt"
+)
+
+type AppError struct {
+	Message string
+	Err     error
+}
+
+func (e *AppError) Error() string {
+	if e.Err != nil {
+		return fmt.Sprintf("%s: %v", e.Message, e.Err)
+	}
+	return e.Message
+}
+
+func (e *AppError) Unwrap() error { return e.Err }
+
+func As(err error) (*AppError, bool) {
+	var ae *AppError
+	if errors.As(err, &ae) {
+		return ae, true
+	}
+	return nil, false
+}
+
+func Wrap(msg string, err error) *AppError { return &AppError{Message: msg, Err: err} }