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. Configure .env

The stack now bootstraps n8n credentials/workflow automatically on every docker compose up.

Required env variables:

• POSTGRES_PASSWORD
• N8N_POSTGRES_CREDENTIAL_ID
• N8N_POSTGRES_CREDENTIAL_NAME
• N8N_SMTP_CREDENTIAL_ID
• N8N_SMTP_CREDENTIAL_NAME
• N8N_SMTP_HOST
• N8N_SMTP_USER
• N8N_SMTP_PASS
• N8N_PAYPAL_KAUTION_LINK
• N8N_PAYPAL_MIETE_LINK
• N8N_PAYMENT_WORKFLOW_ID

2. Mailbox reference (for future incoming-email workflows)

• IMAP host: heracles.mxrouting.net (port 993, SSL/TLS)
• POP3 host: heracles.mxrouting.net (port 995, SSL/TLS)
• Username: office@mc-cars.at
• Password: same mailbox password as SMTP

3. Import behavior

On startup, n8n runs /opt/mc-cars/bootstrap/bootstrap-n8n.sh which:

1. Creates/updates Postgres and SMTP credentials from .env
2. Renders 01-qualification-payment-email.json placeholders
3. Imports the workflow so nodes are always linked to the expected credential IDs
4. Activates the payment workflow automatically (n8n update:workflow --active=true)

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.