implements page-numbers-plan

src/lib/batch.ts

@@ -12,8 +12,11 @@ export type BatchItem = {
 export type BatchProcessResult = { bytes: Uint8Array; name: string };
 
 export type BatchRunOptions = {
-	/** Error message written to a row when `process` throws for it. */
-	errorMessage?: string;
+	/**
+	 * Error message written to a row when `process` throws for it. A function
+	 * receives the thrown error so tools can surface a specific German message.
+	 */
+	errorMessage?: string | ((error: unknown, file: File) => string);
 	/**
 	 * Optional predicate consulted before each item; when it returns `false`
 	 * (for example because the row was removed mid-run), the item is skipped.
@@ -58,7 +61,8 @@ export const runBatch = async (
 				status: 'error',
 				resultBytes: undefined,
 				resultName: undefined,
-				errorMessage
+				errorMessage:
+					typeof errorMessage === 'function' ? errorMessage(error, item.file) : errorMessage
 			});
 		}
 	}