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+Automated Blog Post Generator with GPT-4, DALL-E, and Wikipedia for WordPress
+
+https://n8nworkflows.xyz/workflows/automated-blog-post-generator-with-gpt-4--dall-e--and-wikipedia-for-wordpress-9018
+
+
+# Automated Blog Post Generator with GPT-4, DALL-E, and Wikipedia for WordPress
+
+### 1. Workflow Overview
+
+This workflow automates the creation of a WordPress blog post starting from user-provided keywords. It leverages AI models (GPT-4 and DALL-E) to generate a structured article including title, subtitle, chapters, introduction, conclusions, and a featured image. Wikipedia is used as an auxiliary knowledge source to enrich content accuracy. The workflow is structured into several logical blocks:
+
+- **1.1 User Input Reception:** Collects keywords, number of chapters, and maximum word count from a web form.
+- **1.2 Settings Preparation:** Sets static and dynamic parameters including WordPress URL and input values.
+- **1.3 Article Structure Generation:** Uses GPT-4 to create the article outline and metadata.
+- **1.4 Data Validation:** Checks that all necessary content components are present.
+- **1.5 Chapter Processing:** Splits chapters, generates text for each chapter via GPT-4, and merges them.
+- **1.6 Article Assembly:** Combines introduction, chapters, and conclusions into the full article HTML.
+- **1.7 WordPress Posting:** Posts the article as a draft on WordPress.
+- **1.8 Featured Image Creation:** Generates an image via DALL-E, uploads it to WordPress, and sets it as the post’s featured image.
+- **1.9 User Feedback:** Responds to the user with success or error messages.
+
+---
+
+### 2. Block-by-Block Analysis
+
+#### 2.1 User Input Reception
+
+- **Overview:** Captures user inputs to trigger post creation.
+- **Nodes Involved:** `Form`
+- **Node Details:**
+ - **Form**
+ - Type: Form Trigger (Webhook)
+ - Configuration: Exposes a form with three fields:
+ - Keywords (comma-separated) [required]
+ - Number of chapters (dropdown 1-10) [required]
+ - Max words count (number) [required]
+ - Input: HTTP webhook triggered by form submission
+ - Output: JSON with form data
+ - Potential Failures: Missing required fields, malformed input
+ - Notes: User initiates the workflow by submitting this form.
+
+#### 2.2 Settings Preparation
+
+- **Overview:** Maps user form data to workflow variables and sets the WordPress URL.
+- **Nodes Involved:** `Settings`
+- **Node Details:**
+ - **Settings**
+ - Type: Set node
+ - Configuration: Assigns static WordPress URL and extracts form inputs (`keywords`, `chapters`, `words`) into variables for downstream use.
+ - Input: Output from `Form` node
+ - Output: JSON with structured parameters
+ - Edge Cases: Incorrect or missing WordPress URL can cause posting failures.
+
+#### 2.3 Article Structure Generation
+
+- **Overview:** Generates the article’s metadata and structure using GPT-4, enriched with Wikipedia data.
+- **Nodes Involved:** `Wikipedia`, `Create post title and structure`
+- **Node Details:**
+ - **Wikipedia**
+ - Type: Wikipedia AI Tool
+ - Role: Provides factual information for GPT-4 prompt enrichment.
+ - Input: Triggered by `Create post title and structure` node
+ - Output: Augmented knowledge for AI generation
+ - **Create post title and structure**
+ - Type: OpenAI GPT-4 (LangChain node)
+ - Configuration: Uses GPT-4 (model: gpt-4-1106-preview) to generate JSON including title, subtitle, introduction (~60 words), conclusions (~60 words), image prompt, and chapters (titles & prompts).
+ - Key Prompts:
+ - Instructs to write SEO-friendly article structure based on keywords and chapter count.
+ - Requires chapters to follow logical flow without repetition.
+ - Uses HTML limited to bold, italic, and lists for formatting.
+ - Requires Wikipedia verification of content if available.
+ - Input: Variables from `Settings` node, Wikipedia knowledge
+ - Output: JSON with complete article structure
+ - Failure Modes: AI misinterpretation, incomplete data, API timeouts.
+
+#### 2.4 Data Validation
+
+- **Overview:** Ensures all required article components are present to continue.
+- **Nodes Involved:** `Check data consistency`
+- **Node Details:**
+ - **Check data consistency**
+ - Type: If node
+ - Checks presence and non-empty values for:
+ - Title
+ - Subtitle
+ - Chapters (array length ≥ 1)
+ - Introduction
+ - Conclusions
+ - Image prompt
+ - Input: Output from `Create post title and structure`
+ - Output:
+ - True branch: proceeds to chapter processing
+ - False branch: triggers error response to user
+ - Edge Cases: Missing or malformed AI output causes early termination.
+
+#### 2.5 Chapter Processing
+
+- **Overview:** Processes each chapter individually by splitting, generating text, and merging results.
+- **Nodes Involved:** `Split out chapters`, `Create chapters text`, `Merge chapters title and text`
+- **Node Details:**
+ - **Split out chapters**
+ - Type: SplitOut node
+ - Splits the chapters array into individual items for parallel processing.
+ - Input: Valid article structure
+ - Output: Individual chapter objects
+ - **Create chapters text**
+ - Type: OpenAI GPT-4 (LangChain node)
+ - Configuration: Uses GPT-4 (model: gpt-4-0125-preview) to generate chapter text based on chapter prompt and related context.
+ - Key Prompts:
+ - Writes ~ (max words - 120) / chapter_count words per chapter.
+ - Uses HTML formatting (bold, italic, lists).
+ - Ensures coherence with previous and following chapters.
+ - Does not include chapter headings or introduction/conclusion.
+ - Input: Individual chapter data from `Split out chapters`
+ - Output: Chapter text
+ - Edge Cases: API failures, incoherent text, exceeding token limits
+ - **Merge chapters title and text**
+ - Type: Merge node (combine by position)
+ - Combines chapter titles with generated text back into a single array.
+ - Input: Outputs from `Split out chapters` (titles) and `Create chapters text` (texts)
+ - Output: Combined chapters for article assembly
+
+#### 2.6 Article Assembly
+
+- **Overview:** Combines introduction, chapters, and conclusions into the final article HTML.
+- **Nodes Involved:** `Final article text`
+- **Node Details:**
+ - **Final article text**
+ - Type: Code (JavaScript)
+ - Function:
+ - Starts with introduction text
+ - Appends each chapter with its title in bold followed by its text, separated by line breaks
+ - Ends with conclusions in bold followed by conclusion text
+ - Input: Merged chapters and article structure
+ - Output: Single HTML string under key `article`
+ - Edge Cases: Improper HTML formatting or missing sections.
+
+#### 2.7 WordPress Posting
+
+- **Overview:** Posts the assembled article as a draft on WordPress.
+- **Nodes Involved:** `Post on Wordpress`
+- **Node Details:**
+ - **Post on Wordpress**
+ - Type: WordPress node
+ - Configuration:
+ - Title from article structure
+ - Content from `Final article text` node
+ - Status set to `draft`
+ - Credentials: WordPress API credentials with posting permissions
+ - Input: Final assembled article
+ - Output: Post metadata including post ID
+ - Edge Cases: Authentication failure, WordPress REST API errors, invalid URL
+
+#### 2.8 Featured Image Creation
+
+- **Overview:** Generates and attaches a featured image to the post.
+- **Nodes Involved:** `Generate featured image`, `Upload media`, `Set image ID for the post`
+- **Node Details:**
+ - **Generate featured image**
+ - Type: OpenAI DALL-E (LangChain node)
+ - Configuration:
+ - Prompt includes article title and AI-generated image prompt
+ - Image size 1792x1024, natural style, HD quality
+ - Input: Article structure
+ - Output: Binary image data
+ - Edge Cases: API quota limits, generation failures
+ - **Upload media**
+ - Type: HTTP Request
+ - Configuration:
+ - POST to WordPress media API endpoint
+ - Sends image as binary with proper headers and authorization
+ - Credentials: WordPress API credentials
+ - Input: Binary image from `Generate featured image`
+ - Output: Media metadata including media ID
+ - Edge Cases: Upload errors, authentication issues
+ - **Set image ID for the post**
+ - Type: HTTP Request
+ - Configuration:
+ - POST to WordPress post endpoint with `featured_media` parameter set to uploaded media ID
+ - Credentials: WordPress API credentials
+ - Input: Post ID from `Post on Wordpress`, media ID from `Upload media`
+ - Output: Updated post metadata
+ - Edge Cases: Incorrect post or media IDs, API errors
+
+#### 2.9 User Feedback
+
+- **Overview:** Provides success or error response back to the form submitter.
+- **Nodes Involved:** `Respond: Success`, `Respond: Error`
+- **Node Details:**
+ - **Respond: Success**
+ - Type: Respond to Webhook
+ - Configuration: Returns JSON confirming draft creation with post title
+ - Triggered after successful post and image upload
+ - **Respond: Error**
+ - Type: Respond to Webhook
+ - Configuration: Returns JSON with error message asking user to retry
+ - Triggered if data validation fails
+
+---
+
+### 3. Summary Table
+
+| Node Name | Node Type | Functional Role | Input Node(s) | Output Node(s) | Sticky Note |
+|-----------------------------|----------------------------------|------------------------------------|-----------------------------|-----------------------------|---------------------------------------------------------------------------------------------------|
+| Form | Form Trigger | User form input reception | | Settings | ## User form; The user triggers the post creation |
+| Settings | Set | Prepare parameters and WordPress URL| Form | Create post title and structure | ## Settings; Set the URL of your WordPress here |
+| Wikipedia | LangChain Wikipedia tool | Enrich AI with Wikipedia data | | Create post title and structure (ai_tool) | Wikipedia is used to write the article |
+| Create post title and structure | LangChain OpenAI GPT-4 | Generate article structure and prompts| Settings, Wikipedia | Check data consistency | ## Article structure; Starting from the given keywords, generates the article title, subtitle, chapters, and image prompt |
+| Check data consistency | If | Validate AI output completeness | Create post title and structure | Split out chapters; Respond: Error | ## Data check; Checks that the data returned by OpenAI is correct |
+| Split out chapters | SplitOut | Split chapters array for processing | Check data consistency | Merge chapters title and text; Create chapters text | ## Chapters split; Splits out chapter contents from the previous node |
+| Create chapters text | LangChain OpenAI GPT-4 | Generate text for each chapter | Split out chapters | Merge chapters title and text | ## Chapters text; Writes the text for each chapter |
+| Merge chapters title and text| Merge | Combine chapter titles and texts | Split out chapters; Create chapters text | Final article text | ## Content preparation; Merges the content and prepare it before sending it to WordPress |
+| Final article text | Code | Assemble full article HTML | Merge chapters title and text | Post on Wordpress | |
+| Post on Wordpress | WordPress | Publish draft post | Final article text | Generate featured image | ## Draft on WordPress; The article is posted as a draft on WordPress |
+| Generate featured image | LangChain OpenAI DALL-E | Generate cover image | Post on Wordpress | Upload media | ## Featured image; The image is generated with Dall-E, uploaded to WordPress, and then connected to the post as its featured image |
+| Upload media | HTTP Request | Upload image to WordPress media library| Generate featured image | Set image ID for the post | |
+| Set image ID for the post | HTTP Request | Assign uploaded image as featured media| Upload media | Respond: Success | |
+| Respond: Success | Respond to Webhook | Confirm successful article creation | Set image ID for the post | | ## User feedback; Final confirmation to the user |
+| Respond: Error | Respond to Webhook | Return error message on failure | Check data consistency (false branch) | | User is notified to try again since some data is missing |
+
+---
+
+### 4. Reproducing the Workflow from Scratch
+
+1. **Create a Form Trigger node (named `Form`):**
+ - Path: `create-wordpress-post`
+ - Form Title: "Create a WordPress post with AI"
+ - Form Fields:
+ - Keywords (comma-separated), required text
+ - Number of chapters, dropdown (options 1-10), required
+ - Max words count, number, required
+ - Response Mode: Response node
+
+2. **Add a Set node (`Settings`):**
+ - Assign:
+ - `wordpress_url` = string, your WordPress base URL (e.g., https://your-wordpress-url.com/)
+ - `keywords` = expression: `{{$json["Keywords (comma-separated)"]}}`
+ - `chapters` = number: `{{$json["Number of chapters"]}}`
+ - `words` = number: `{{$json["Max words count"]}}`
+ - Connect from `Form`
+
+3. **Add a Wikipedia AI Tool node (`Wikipedia`):**
+ - No parameters required
+ - This node will be invoked by the next OpenAI node
+
+4. **Add an OpenAI GPT-4 node (`Create post title and structure`):**
+ - Model: `gpt-4-1106-preview`
+ - Max tokens: 2048
+ - Messages: Single system/user message with detailed prompt instructing to create:
+ - title, subtitle, introduction (~60 words), conclusions (~60 words), image prompt
+ - chapters array with `title` and `prompt` for each chapter (count from `chapters`)
+ - Use HTML formatting (bold, italic, lists), no markdown
+ - Use Wikipedia data internally for fact-checking if applicable
+ - Set JSON output enabled
+ - Credentials: OpenAI API credentials
+ - Connect `Settings` node to this node’s main input
+ - Connect `Wikipedia` node via AI Tool input of this node
+
+5. **Add an If node (`Check data consistency`):**
+ - Conditions: Check that the following fields are non-empty/non-null in the output JSON:
+ - `message.content.title` (string not empty)
+ - `message.content.subtitle` (string not empty)
+ - `message.content.chapters` (array length ≥ 1)
+ - `message.content.introduction` (string not empty)
+ - `message.content.conclusions` (string not empty)
+ - `message.content.imagePrompt` (string not empty)
+ - Connect from `Create post title and structure`
+ - True branch connects to chapter processing
+ - False branch connects to error response
+
+6. **Add a SplitOut node (`Split out chapters`):**
+ - Field to split out: `message.content.chapters`
+ - Connect from If node’s true branch
+
+7. **Add an OpenAI GPT-4 node (`Create chapters text`):**
+ - Model: `gpt-4-0125-preview`
+ - Max tokens: 2048
+ - Messages: Prompt to write chapter text based on chapter title and prompt, including context from surrounding chapters, using HTML formatting only (bold, italic, lists), no markdown.
+ - Length target: approximately (`words` -120) / `chapters` words per chapter
+ - Credentials: OpenAI API credentials
+ - Connect from `Split out chapters`
+
+8. **Add a Merge node (`Merge chapters title and text`):**
+ - Mode: Combine
+ - Combination mode: Merge by position
+ - Connect inputs from both `Split out chapters` (titles) and `Create chapters text` (texts)
+
+9. **Add a Code node (`Final article text`):**
+ - JavaScript code to concatenate:
+ - Introduction from `Create post title and structure`
+ - Each chapter’s title (bold) and text separated by `
`
+ - Conclusions (bold) and conclusions text
+ - Output field: `article` with full HTML string
+ - Connect from `Merge chapters title and text`
+
+10. **Add a WordPress node (`Post on Wordpress`):**
+ - Credentials: WordPress API with posting rights
+ - Title: Expression from `Create post title and structure`: `{{$json.message.content.title}}`
+ - Content: Expression from `Final article text`: `{{$json.article}}`
+ - Status: Draft
+ - Connect from `Final article text`
+
+11. **Add an OpenAI DALL-E node (`Generate featured image`):**
+ - Resource: Image generation
+ - Prompt: Combine article title and image prompt from `Create post title and structure` with photographic style instructions
+ - Image size: 1792x1024
+ - Style: Natural
+ - Quality: HD
+ - Credentials: OpenAI API
+ - Connect from `Post on Wordpress`
+
+12. **Add HTTP Request node (`Upload media`):**
+ - Method: POST
+ - URL: `{wordpress_url}/wp-json/wp/v2/media` (replace with your WordPress URL)
+ - Content type: binary data
+ - Send headers:
+ - `Content-Disposition: attachment; filename="example.jpg"`
+ - Authentication: Use WordPress API credentials
+ - Input data field name: `data` (binary image from previous node)
+ - Connect from `Generate featured image`
+
+13. **Add HTTP Request node (`Set image ID for the post`):**
+ - Method: POST
+ - URL: `{wordpress_url}/wp-json/wp/v2/posts/{post_id}` where `post_id` is from `Post on Wordpress` output JSON
+ - Query parameter: `featured_media` = ID from `Upload media` response JSON
+ - Authentication: WordPress API credentials
+ - Connect from `Upload media`
+
+14. **Add Respond to Webhook node (`Respond: Success`):**
+ - Response type: JSON
+ - Body: `{"formSubmittedText":"The article {{$json.title.rendered}} was correctly created as a draft on WordPress!"}`
+ - Connect from `Set image ID for the post`
+
+15. **Add Respond to Webhook node (`Respond: Error`):**
+ - Response type: JSON
+ - Body: `{"formSubmittedText":"There was a problem creating the article, please refresh the form and try again!"}`
+ - Connect from `Check data consistency` false branch
+
+---
+
+### 5. General Notes & Resources
+
+| Note Content | Context or Link |
+|---------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------|
+| The article is posted as a draft on WordPress and not published directly to allow manual review. | WordPress Posting Block |
+| Image generation uses DALL-E via OpenAI with specific photographic style instructions for realism and quality. | Featured Image Block |
+| Wikipedia data is integrated as a knowledge tool to improve factual accuracy of generated content. | AI Content Generation Block |
+| The workflow is designed to maintain coherent, fluent article flow avoiding repetition between chapters. | Chapter Generation and Processing |
+| Ensure WordPress API credentials have required scopes for posting and media upload operations. | WordPress Credential Setup |
+| OpenAI API credentials must have access to GPT-4 and DALL-E models and sufficient quota for prompt processing. | OpenAI Credential Setup |
+| The form trigger node exposes a public webhook; secure this endpoint as needed to prevent unauthorized use. | User Input Reception |
+| Recommended max tokens are set conservatively to avoid truncation in GPT-4 calls; adjust based on need. | AI Nodes Configuration |
+| HTML formatting in generated content is limited to bold, italic, and lists to maintain WordPress compatibility.| Formatting Guidelines |
+| API error handling is basic; consider adding retries or error logging for production environments. | Workflow Robustness |
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