first commit

packages/nodes-base/nodes/Code/ExecutionError.ts

@@ -0,0 +1,91 @@
+import { ApplicationError } from '@n8n/errors';
+
+export class ExecutionError extends ApplicationError {
+	description: string | null = null;
+
+	itemIndex: number | undefined = undefined;
+
+	context: { itemIndex: number } | undefined = undefined;
+
+	stack = '';
+
+	lineNumber: number | undefined = undefined;
+
+	constructor(error: Error & { stack?: string }, itemIndex?: number) {
+		super(error.message);
+		this.itemIndex = itemIndex;
+
+		if (this.itemIndex !== undefined) {
+			this.context = { itemIndex: this.itemIndex };
+		}
+
+		this.stack = error.stack ?? '';
+
+		this.populateFromStack();
+	}
+
+	/**
+	 * Populate error `message` and `description` from error `stack`.
+	 */
+	private populateFromStack() {
+		const stackRows = this.stack && typeof this.stack === 'string' ? this.stack.split('\n') : [];
+
+		if (stackRows.length === 0) {
+			this.message = 'Unknown error';
+			return;
+		}
+
+		const messageRow = stackRows.find((line) => line.includes('Error:'));
+		const lineNumberRow = stackRows.find((line) => line.includes('Code:'));
+		const lineNumberDisplay = this.toLineNumberDisplay(lineNumberRow) || '';
+
+		if (!messageRow) {
+			this.message = `Unknown error ${lineNumberDisplay}`;
+			return;
+		}
+
+		const [errorDetails, errorType] = this.toErrorDetailsAndType(messageRow);
+
+		if (errorType) this.description = errorType;
+
+		if (!errorDetails) {
+			this.message = `Unknown error ${lineNumberDisplay}`;
+			return;
+		}
+
+		this.message = `${errorDetails} ${lineNumberDisplay}`.trim();
+	}
+
+	private toLineNumberDisplay(lineNumberRow?: string) {
+		const errorLineNumberMatch = lineNumberRow?.match(/Code:(?<lineNumber>\d+)/);
+
+		if (!errorLineNumberMatch?.groups?.lineNumber) return null;
+
+		const lineNumber = errorLineNumberMatch.groups.lineNumber;
+
+		this.lineNumber = Number(lineNumber);
+
+		if (!lineNumber) return '';
+
+		return this.itemIndex === undefined
+			? `[line ${lineNumber}]`
+			: `[line ${lineNumber}, for item ${this.itemIndex}]`;
+	}
+
+	private toErrorDetailsAndType(messageRow?: string) {
+		if (!messageRow) return [null, null];
+
+		// Remove "Error: " prefix added by stacktrace formatting
+		messageRow = messageRow.replace(/^Error: /, '');
+
+		const colonIndex = messageRow.indexOf(': ');
+		if (colonIndex === -1) {
+			return [messageRow.trim(), null];
+		}
+
+		const errorType = messageRow.substring(0, colonIndex).trim();
+		const errorDetails = messageRow.substring(colonIndex + 2).trim();
+
+		return [errorDetails, errorType === 'Error' ? null : errorType];
+	}
+}