feat(n8n Form Trigger Node): New node (#7130)

Github issue / Community forum post (link here to close automatically):

based on https://github.com/joffcom/n8n-nodes-form-trigger

---------

Co-authored-by: Giulio Andreini <g.andreini@gmail.com>

packages/nodes-base/nodes/Form/utils.ts

@@ -0,0 +1,64 @@
+import type { IDataObject } from 'n8n-workflow';
+import type { FormField, FormTriggerData, FormTriggerInput } from './interfaces';
+
+export const prepareFormData = (
+	formTitle: string,
+	formDescription: string,
+	formSubmittedText: string | undefined,
+	formFields: FormField[],
+	testRun: boolean,
+	instanceId?: string,
+) => {
+	const validForm = formFields.length > 0;
+	const utm_campaign = instanceId ? `&utm_campaign=${instanceId}` : '';
+	const n8nWebsiteLink = `https://n8n.io/?utm_source=n8n-internal&utm_medium=form-trigger${utm_campaign}`;
+
+	if (formSubmittedText === undefined) {
+		formSubmittedText = 'Your response has been recorded';
+	}
+
+	const formData: FormTriggerData = {
+		testRun,
+		validForm,
+		formTitle,
+		formDescription,
+		formSubmittedText,
+		n8nWebsiteLink,
+		formFields: [],
+	};
+
+	if (!validForm) {
+		return formData;
+	}
+
+	for (const [index, field] of formFields.entries()) {
+		const { fieldType, requiredField, multiselect } = field;
+
+		const input: IDataObject = {
+			id: `field-${index}`,
+			errorId: `error-field-${index}`,
+			label: field.fieldLabel,
+			inputRequired: requiredField ? 'form-required' : '',
+		};
+
+		if (multiselect) {
+			input.isMultiSelect = true;
+			input.multiSelectOptions =
+				field.fieldOptions?.values.map((e, i) => ({
+					id: `option${i}`,
+					label: e.option,
+				})) ?? [];
+		} else if (fieldType === 'dropdown') {
+			input.isSelect = true;
+			const fieldOptions = field.fieldOptions?.values ?? [];
+			input.selectOptions = fieldOptions.map((e) => e.option);
+		} else {
+			input.isInput = true;
+			input.type = fieldType as 'text' | 'number' | 'date';
+		}
+
+		formData.formFields.push(input as FormTriggerInput);
+	}
+
+	return formData;
+};