mc_cars_gmbh_infraestructure/n8n/workflows

n8n Workflows – MC Cars

This folder contains exportable n8n workflow definitions for the MC Cars qualification automation.

Workflows

01 – Qualification Payment Email

Trigger: Postgres NOTIFY on channel lead_qualified (fires when qualify_lead() creates a sales order).

Flow:

1. Receives notification with sales_order_id, customer_id, etc.
2. Fetches full order + customer data from Postgres.
3. Sends HTML email to customer with:
   • Booking summary (vehicle, dates, pricing)
   • Kaution bank transfer instructions
   • Payment link for the rental amount

02 – Mietvertrag PDF Email

Trigger: Same lead_qualified Postgres notification.

Flow:

1. Checks if mietvertrag_template_path is set in site_settings.
2. If no template → workflow stops (no error).
3. If template exists:
   • Fetches customer + sales order data
   • Downloads DOCX template from document-templates storage bucket
   • Fills placeholders using JSZip (in a Code node)
   • Converts filled DOCX to PDF via Gotenberg
   • Sends PDF as email attachment to customer

Setup Instructions

1. Create Postgres credential in n8n

• Name: MC Cars Postgres
• Host: db
• Port: 5432
• Database: postgres
• User: postgres
• Password: (value of POSTGRES_PASSWORD from .env)

2. Create SMTP credential in n8n

• Name: MC Cars SMTP
• Host: your SMTP server (e.g. smtp.mailgun.org, mail.mc-cars.at)
• Port: 587 (TLS) or 465 (SSL)
• User: your SMTP username
• Password: your SMTP password
• From: info@mc-cars.at

3. Import workflows

1. Open n8n at http://localhost:55590
2. Go to Workflows → Import from file
3. Import 01-qualification-payment-email.json
4. Import 02-mietvertrag-pdf-email.json
5. Open each workflow → assign the credentials created above → Activate

4. Upload Mietvertrag template (optional)

1. Open Admin panel → Einstellungen tab
2. Upload a DOCX file in the "Mietvertrag-Vorlage" section
3. The template should contain these placeholders:

Placeholder	Replaced with
{{KUNDE_NAME}}	Customer full name
{{KUNDE_EMAIL}}	Customer email
{{KUNDE_TELEFON}}	Customer phone
{{BESTELLNUMMER}}	Sales order number (e.g. SO-2026-0001)
{{FAHRZEUG}}	Vehicle label (e.g. "Ferrari 488 GTB")
{{DATUM_VON}}	Rental start date (DD.MM.YYYY)
{{DATUM_BIS}}	Rental end date (DD.MM.YYYY)
{{TAGE_GESAMT}}	Total rental days
{{WOCHENTAGE}}	Number of weekdays
{{WOCHENENDTAGE}}	Number of weekend days
{{TAGESSATZ}}	Weekday daily subtotal
{{WOCHENENDZUSCHLAG}}	Weekend surcharge subtotal
{{NETTO}}	Net amount (excl. VAT)
{{MWST}}	VAT amount (19%)
{{GESAMT}}	Total amount (incl. VAT)
{{KAUTION}}	Deposit amount
{{DATUM_HEUTE}}	Today's date (DD.MM.YYYY)

Dependencies

• Gotenberg (docker service gotenberg) — converts DOCX → PDF via LibreOffice
• n8n needs the jszip npm package (pre-installed in n8n Docker image)

Domain

All email links and sender addresses use mc-cars.at.