Manage errors

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

packages/helpers/src/error.ts

@@ -0,0 +1,26 @@
+export interface GraphQLError {
+  message?: string;
+  source?: {
+    errors?: Array<{ message: string }>;
+  };
+}
+
+export function formatError(title: string, error: GraphQLError | GraphQLError[]): string {
+  const messages: string[] = [];
+
+  if (Array.isArray(error)) {
+    messages.push(...error.map((e) => e.message).filter(Boolean) as string[]);
+  } else if (error.source?.errors && Array.isArray(error.source.errors)) {
+    messages.push(...error.source.errors.map((e) => e.message).filter(Boolean));
+  } else if (error.message) {
+    messages.push(error.message);
+  }
+
+  if (messages.length === 0) {
+    return title;
+  }
+
+  const errorList = messages.join(", ");
+
+  return `${title}: ${errorList}${errorList.endsWith('.') ? '' : '.'}`;
+}