linkedIn-post-creator

AI agent that creates a LinkedIn post when user send a URL to a Slack channel.

n8n LinkedIn Post Creator Workflow

Overview

This workflow processes web URLs shared in a Slack channel or Google Drive links and generates LinkedIn post text using AI.

Prerequisites

Ensure you have the following before setup:

• n8n (self-hosted-ai-starter-kit) installed locally or on a server.
• Slack workspace access with bot creation permissions.
• Google Drive API access (if processing files from Google Drive).
• OpenAI API key for AI-generated content.

Setup Instructions

1. Start n8n

Run self-hosted-ai-starter-kit or n8n on your local machine or server.

2. Content Processing Setup

HTML Processing (if not using self-hosted-ai-starter-kit)

Add the following to your .env file:

NODE_FUNCTION_ALLOW_EXTERNAL=axios,url,path,file-type,jsdom,@mozilla/readability

Add the following to your Dockerfile:

RUN npm install -g axios url file-type neo4j-driver @mozilla/readability \
    jsdom marked pdf.js-extract pdf-parse-fork tiktoken firebase-admin \
    canvas json5 katex marked-katex-extension pdfjs-dist ioredis amqplib \
    pdf-img-convert flexsearch puppeteer turndown sanitize-html \
    commonmark path

PDF Processing (Docling Integration)

1. Build and Run the Docling API Container using the provided docling-api directory.
2. Create a Docker Network (e.g., n8n-network) and connect both the Docling API and n8n containers.
3. Configure n8n HTTP Node to send requests to:

   http://docling-api:5000/process
   

   Pass in the PDF URL or content to be parsed.

3. Import the Workflow

Import the provided workflow JSON file into n8n.

4. Configure Credentials

Slack API:

Connecting Slack API and Slack oAuth2 API Credentials in n8n

Step 1: Create a Slack Bot

1. Create a new app.
2. Name the app LinkedIn Bot.
3. Once the bot is created, you can proceed with configuring the bot's permissions and credentials.

Step 2: Set Scopes for Slack Bot

1. Under OAuth & Permissions in the Slack API, configure the Bot Token Scopes. Add the following scopes to define the permissions your bot requires:
   • app_mentions:read: View messages that directly mention @LinkedIn Bot in conversations where the bot is present.
   • channels:history: View messages and other content in public channels that LinkedIn Bot is a part of.
   • channels:read: View basic information about public channels in the workspace.
   • chat:write: Send messages as @LinkedIn Bot.
   • groups:read: Read information about private groups.

Step 3: Get the Redirect URL for Slack OAuth2 API

1. In n8n, create a new credential for Slack OAuth2 API.
2. The Redirect URL will be generated in the Slack OAuth2 API credential node in n8n.
3. Go to Slack API → OAuth & Permissions, and in the Redirect URL field, add the Redirect URL obtained from the n8n Slack OAuth2 API credential node.

Step 4: Install App to Your Workspace

1. In the Slack API page, under OAuth & Permissions, click on Install to "Workspace Name".
2. After installing, a Bot User OAuth Token will be generated.
3. This Bot User OAuth Token is added to Slack Api Credential in n8n under Access Token.

Step 5: Configure Slack OAuth2 API Credentials in n8n

1. In n8n, under the Slack OAuth2 API credentials, input the following:
   • Client ID and Client Secret Key, which can be found under Basic Information on the Slack API page.

Step 6: Enable Event Subscription

1. In the Slack API settings, go to Event Subscriptions and enable events.
2. In the Request URL field, provide the test or production URL that you get from the Slack Trigger node in n8n under Webhook URLs.
3. Under Subscribe to Bot Mentions, add the following event:
   • Event Name: app_mention

Using ngrok (if n8n is locally hosted)

1. Install ngrok (if not installed).
2. Run:

   ngrok http 5678  # Assuming n8n runs on port 5678

3. Use the generated HTTPS URL in Slack credentials.

Google Drive API:

• Create and authenticate a Google Drive credential.

OpenAI API:

• Add your OpenAI API key for AI-powered text generation.

Testing

Use the Testing URL from the Slack Trigger Node’s Webhook URL.

Deployment

For production, use the Production URL from the Slack Trigger Node’s Webhook URL.