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Generate LinkedIn Posts with GPT-4, Preview on WhatsApp, and Auto-Publish
https://n8nworkflows.xyz/workflows/generate-linkedin-posts-with-gpt-4--preview-on-whatsapp--and-auto-publish-4419
# Generate LinkedIn Posts with GPT-4, Preview on WhatsApp, and Auto-Publish
### 1. Workflow Overview
This workflow automates the generation, preview, approval, and publishing of LinkedIn posts using GPT-4 and WhatsApp integration. It is designed to create unique content around trending AI topics, allow preview and approval through WhatsApp messaging, and finally auto-publish approved posts to LinkedIn. The workflow is split into six logical blocks:
- **1.1 Scheduling:** Periodically triggers the content generation process.
- **1.2 AI Generation:** Uses GPT-4 to generate LinkedIn post content based on selected AI topics.
- **1.3 Processing:** Formats and prepares the AI-generated content for preview.
- **1.4 Approval System:** Sends the content preview via WhatsApp and waits for approval or rejection.
- **1.5 Publishing:** Formats the approved content and posts it automatically to LinkedIn, followed by a success notification.
- **1.6 Smart Restart:** Handles declined content by notifying via WhatsApp and restarting content generation.
---
### 2. Block-by-Block Analysis
#### 2.1 Scheduling
- **Overview:**
This block initiates the workflow every 6 hours (adjustable) to kickstart the LinkedIn content generation process.
- **Nodes Involved:**
- Schedule Trigger
- Prepare Search Topics
- **Node Details:**
- **Schedule Trigger**
- *Type & Role:* Schedule trigger node to start the workflow periodically.
- *Configuration:* Runs every 6 hours by default (modifiable schedule).
- *Connections:* Outputs to "Prepare Search Topics".
- *Potential Failures:* Misconfiguration of the schedule may cause missed triggers.
- *Notes:* Runs every 6 hours - adjust timing as needed for your posting schedule.
- **Prepare Search Topics**
- *Type & Role:* Function node selecting random AI-related topics for content generation.
- *Configuration:* Uses a predefined array of search terms representing AI topics, selects one or multiple randomly.
- *Key Variables:* `searchTerms` array containing niche topics.
- *Connections:* Takes input from "Schedule Trigger" and outputs to "AI Content Generator".
- *Potential Failures:* Empty or malformed `searchTerms` array; function errors if random selection fails or no input.
- *Notes:* Modify `searchTerms` array for your specific niche or trending topics.
---
#### 2.2 AI Generation
- **Overview:**
Generates unique LinkedIn post content based on selected AI topics by leveraging GPT-4 powered nodes.
- **Nodes Involved:**
- AI Content Generator
- OpenAI GPT-4 Model
- **Node Details:**
- **AI Content Generator**
- *Type & Role:* Langchain Agent node that drives content generation logic.
- *Configuration:* Uses GPT-4 as underlying model, builds prompt around trending AI topics.
- *Connections:* Receives input from "Prepare Search Topics", sends output to "Process AI Content".
- *Version:* 1.9 (Langchain agent version)
- *Potential Failures:* API quota limits, prompt errors, invalid input format.
- *Notes:* Customize the prompt to fit your industry or target audience.
- **OpenAI GPT-4 Model**
- *Type & Role:* Language model node providing GPT-4 capabilities.
- *Configuration:* Requires valid OpenAI API key credential.
- *Connections:* Linked as the language model target for "AI Content Generator".
- *Version:* 1.2
- *Potential Failures:* Authentication errors, API timeouts, rate limits.
---
#### 2.3 Processing
- **Overview:**
Processes the raw AI-generated text, parsing and formatting it for LinkedIn posting.
- **Nodes Involved:**
- Process AI Content
- **Node Details:**
- **Process AI Content**
- *Type & Role:* Function node to parse and format AI response into LinkedIn-ready content.
- *Configuration:* Extracts relevant text from AI output, cleans formatting, applies any required text transformations.
- *Connections:* Receives from "AI Content Generator", outputs to "Send Content Preview".
- *Potential Failures:* Parsing errors if AI output is unexpected; expression failures if text is malformed.
---
#### 2.4 Approval System
- **Overview:**
Sends the formatted content preview to the user's phone via WhatsApp for review and waits for approval before proceeding.
- **Nodes Involved:**
- Send Content Preview
- WhatsApp Approval Gateway
- Check Approval Status
- **Node Details:**
- **Send Content Preview**
- *Type & Role:* WhatsApp node that sends the generated content preview.
- *Configuration:* Uses WhatsApp API credentials, configured to send a message to a predefined phone number.
- *Connections:* Receives from "Process AI Content", outputs to "WhatsApp Approval Gateway".
- *Potential Failures:* Messaging API errors, invalid phone numbers, connectivity issues.
- *Webhook:* Has webhook ID for WhatsApp messaging.
- **WhatsApp Approval Gateway**
- *Type & Role:* WhatsApp node waiting for user’s approval reply.
- *Configuration:* Listens for WhatsApp responses with a webhook, designed to capture approval or decline input.
- *Connections:* Receives from "Send Content Preview", outputs to "Check Approval Status".
- *Potential Failures:* Delayed or missing user responses, webhook failures.
- *Webhook:* Has webhook ID for WhatsApp message reception.
- **Check Approval Status**
- *Type & Role:* If node routing workflow based on approval input.
- *Configuration:* Checks the WhatsApp reply; routes to publish if approved, or decline path otherwise.
- *Connections:* Receives from "WhatsApp Approval Gateway", outputs to "Format LinkedIn Post" on approval, or "Send Decline Notification" on rejection.
- *Potential Failures:* Misinterpretation of input, expression errors.
---
#### 2.5 Publishing
- **Overview:**
Formats the approved content and posts it automatically to LinkedIn, then sends a success notification via WhatsApp.
- **Nodes Involved:**
- Format LinkedIn Post
- Publish to LinkedIn
- Send Success Notification
- **Node Details:**
- **Format LinkedIn Post**
- *Type & Role:* Function node to finalize content format for LinkedIn.
- *Configuration:* Applies any final text adjustments, hashtags, or metadata required by LinkedIn.
- *Connections:* Receives from "Check Approval Status" (approval branch), outputs to "Publish to LinkedIn".
- *Potential Failures:* Formatting errors, text length issues.
- **Publish to LinkedIn**
- *Type & Role:* LinkedIn node that posts the content to the user’s LinkedIn profile.
- *Configuration:* Requires LinkedIn OAuth2 credentials with posting permissions.
- *Connections:* Receives from "Format LinkedIn Post", outputs to "Send Success Notification".
- *Potential Failures:* Authentication failures, API rate limits, invalid post content.
- **Send Success Notification**
- *Type & Role:* WhatsApp node notifying user of successful post publication.
- *Configuration:* Sends confirmation message to predefined phone number.
- *Connections:* Receives from "Publish to LinkedIn".
- *Potential Failures:* Messaging issues, webhook errors.
---
#### 2.6 Smart Restart
- **Overview:**
Handles declined posts by notifying the user and restarting the content generation process automatically.
- **Nodes Involved:**
- Send Decline Notification
- Restart Content Generation
- **Node Details:**
- **Send Decline Notification**
- *Type & Role:* WhatsApp node that informs the user that the content was rejected and the process will restart.
- *Configuration:* Sends a decline message to the user’s phone.
- *Connections:* Receives from "Check Approval Status" (decline branch), outputs to "Restart Content Generation".
- *Potential Failures:* Messaging API errors.
- **Restart Content Generation**
- *Type & Role:* Execute Workflow node that triggers the workflow again from the "Prepare Search Topics" node.
- *Configuration:* Linked to the same workflow, starting at the content preparation stage.
- *Connections:* Receives from "Send Decline Notification", outputs to "Prepare Search Topics".
- *Potential Failures:* Recursive loop risk if approvals are never given; system resource exhaustion.
---
### 3. Summary Table
| Node Name | Node Type | Functional Role | Input Node(s) | Output Node(s) | Sticky Note |
|-------------------------|----------------------------------|--------------------------------------------|-----------------------------|------------------------------|-----------------------------------------------------------|
| 📋 Workflow Overview | Sticky Note | Overview of the workflow | | | |
| ⚙️ Setup Guide | Sticky Note | Setup instructions | | | |
| 🕐 Stage 1: Scheduling | Sticky Note | Scheduling block marker | | | |
| Schedule Trigger | Schedule Trigger | Triggers workflow every 6 hours | | Prepare Search Topics | 🕐 Runs every 6 hours - adjust timing as needed for your posting schedule |
| Prepare Search Topics | Function | Selects random AI topics | Schedule Trigger | AI Content Generator | 🎯 Selects random AI topics for content generation. Modify searchTerms array for your niche. |
| 🧠 Stage 2: AI Generation | Sticky Note | AI generation block marker | | | |
| AI Content Generator | Langchain Agent (GPT-4) | Generates LinkedIn content using GPT-4 | Prepare Search Topics | Process AI Content | 🤖 GPT-4 generates unique LinkedIn content based on trending AI topics. Customize the prompt for your industry/niche. |
| OpenAI GPT-4 Model | Langchain OpenAI Chat Model | GPT-4 language model | | AI Content Generator (LM) | 🧠 GPT-4 language model for content generation. Requires OpenAI API key. |
| ⚙️ Stage 3: Processing | Sticky Note | Processing block marker | | | |
| Process AI Content | Function | Parse and format AI response | AI Content Generator | Send Content Preview | ⚙️ Parses AI response and formats content for LinkedIn posting |
| 📲 Stage 4: Approval System | Sticky Note | Approval system block marker | | | |
| Send Content Preview | WhatsApp | Sends content preview to phone | Process AI Content | WhatsApp Approval Gateway | 📱 Sends generated content to your phone for preview before publishing |
| WhatsApp Approval Gateway | WhatsApp | Waits for approval reply via WhatsApp | Send Content Preview | Check Approval Status | ⏳ Waits for your approval via WhatsApp before proceeding |
| Check Approval Status | If | Routes based on approval decision | WhatsApp Approval Gateway | Format LinkedIn Post, Send Decline Notification | ✅ Routes workflow based on your approval decision |
| 🎯 Stage 5: Publishing | Sticky Note | Publishing block marker | | | |
| Format LinkedIn Post | Function | Final formatting for LinkedIn post | Check Approval Status (Yes) | Publish to LinkedIn | ✨ Final formatting of approved content for LinkedIn posting |
| Publish to LinkedIn | LinkedIn | Posts content automatically | Format LinkedIn Post | Send Success Notification | 🔗 Auto-posts approved content to your LinkedIn profile |
| Send Success Notification | WhatsApp | Sends success confirmation | Publish to LinkedIn | | 🎉 Confirms successful LinkedIn posting |
| ♻️ Stage 6: Smart Restart | Sticky Note | Smart restart block marker | | | |
| Send Decline Notification | WhatsApp | Notifies content decline and restart | Check Approval Status (No) | Restart Content Generation | ❌ Notifies that content was declined and workflow will restart |
| Restart Content Generation | Execute Workflow | Restarts content generation process | Send Decline Notification | Prepare Search Topics | 🔄 Restarts workflow to generate new content after decline |
---
### 4. Reproducing the Workflow from Scratch
1. **Create Schedule Trigger Node**
- Type: Schedule Trigger
- Set to trigger every 6 hours (adjust as needed).
2. **Create Prepare Search Topics Function Node**
- Connect input from "Schedule Trigger".
- Define an array `searchTerms` with AI or niche topics.
- Randomly select a topic to output for content generation.
3. **Set up OpenAI GPT-4 Model Node**
- Type: Langchain OpenAI Chat Model
- Configure with valid OpenAI API credentials.
- Version should be 1.2 or compatible.
4. **Create AI Content Generator Node**
- Type: Langchain Agent (GPT-4)
- Connect input from "Prepare Search Topics".
- Configure to use the OpenAI GPT-4 Model node as its language model.
- Customize the prompt template to generate LinkedIn posts based on input topics.
5. **Add Process AI Content Function Node**
- Connect input from "AI Content Generator".
- Implement parsing logic to extract and format the AI-generated text for LinkedIn.
6. **Create Send Content Preview WhatsApp Node**
- Connect input from "Process AI Content".
- Configure WhatsApp API credentials and target phone number.
- Set to send the formatted content as a message.
7. **Create WhatsApp Approval Gateway Node**
- Connect input from "Send Content Preview".
- Configure webhook to listen for approval or decline responses from WhatsApp.
8. **Add Check Approval Status If Node**
- Connect input from "WhatsApp Approval Gateway".
- Define condition to check if the reply is approval (e.g., message contains "yes" or "approve").
- Output true branch to "Format LinkedIn Post"; false branch to "Send Decline Notification".
9. **Create Format LinkedIn Post Function Node**
- Connect input from true branch of "Check Approval Status".
- Implement final formatting for LinkedIn post (hashtags, mentions, etc.).
10. **Add Publish to LinkedIn Node**
- Connect input from "Format LinkedIn Post".
- Configure LinkedIn OAuth2 credentials with posting rights.
11. **Create Send Success Notification WhatsApp Node**
- Connect input from "Publish to LinkedIn".
- Configure WhatsApp to notify success confirmation.
12. **Create Send Decline Notification WhatsApp Node**
- Connect input from false branch of "Check Approval Status".
- Configure WhatsApp to notify content rejection.
13. **Add Restart Content Generation Execute Workflow Node**
- Connect input from "Send Decline Notification".
- Set to call the same workflow, starting from "Prepare Search Topics".
- Ensure parameters and context are reset appropriately.
14. **Test entire workflow end-to-end**
- Validate scheduling triggers.
- Confirm AI content generation and formatting.
- Verify WhatsApp preview sending and approval response handling.
- Check LinkedIn posting and notification delivery.
- Test decline path and workflow restart.
---
### 5. General Notes & Resources
| Note Content | Context or Link |
|-----------------------------------------------------------------------------------------------------|-------------------------------------------------------|
| Workflow runs every 6 hours by default; adjust schedule to fit your posting frequency needs. | Scheduling recommendations |
| Customize AI prompt in "AI Content Generator" to better match your brand tone or niche. | AI content customization |
| WhatsApp integration requires webhook setup and valid API credentials. | WhatsApp API documentation |
| LinkedIn node requires OAuth2 credentials with permissions to post content on your profile. | LinkedIn Developer Portal |
| Recursive workflow restart may cause infinite loops if never approved; implement safeguards if needed.| Workflow stability advice |
---
**Disclaimer:** The provided text is exclusively generated from an automated n8n workflow. It complies strictly with content policies, contains no illegal or offensive elements, and manipulates only legal and public data.