Générateur de blog WordPress automatisé (GPT + Postgres + Médias WP)

• •Informations de connexion à la base de données PostgreSQL
• •Peut nécessiter les informations d'identification d'authentification de l'API cible
• •Clé API OpenAI

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        "jsCode": "const items = $input.all();\n\nlet image = null;\nlet contentBlock = null;\nlet categoryBlock = null;\nlet titleBlock = null;\n\n// Inspect all incoming JSON\nfor (const item of items) {\n  const json = item.json;\n\n  // Detect image\n  if (json?.source_url && json?.media_type === 'image') {\n    image = json;\n    continue;\n  }\n\n  // Detect GPT-generated content\n  if (typeof json.content === 'string' && json.content.includes('<!-- wp:paragraph')) {\n    contentBlock = json;\n    continue;\n  }\n\n  // Detect category block\n  if (json?.category_id && json?.description) {\n    categoryBlock = json;\n    continue;\n  }\n\n  // Detect GPT-generated title from AI output\n  if (typeof json.output === 'string') {\n    titleBlock = json;\n    continue;\n  }\n\n  // Fallback title if nothing else matched\n  if (typeof json.title === 'string') {\n    titleBlock = json;\n  }\n}\n\nreturn [{\n  json: {\n    title: $input.first().json.title,\n    content: contentBlock?.content || '<p>No content</p>',\n    status: 'publish',\n    categories: [categoryBlock?.category_id || 1],\n    featured_media: image?.id || null,\n  }\n}];\n"
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        "content": "# 🤖 WordPress Blog Automation Workflow\n\n## 🛠 SETUP (do once before running the flow)\n\n### 1 · DOMAIN  \nAdd one variable anywhere **before** the workflow starts (via Set node, `.env`, or instance config):\n```\nDOMAIN=https://your-wordpress-site.com\n```\nThis will be used in all WordPress REST API calls.\n\n---\n\n### 2 · CREDENTIALS (create in **n8n → Credentials**)\n| Credential Name | Purpose | Minimum Scope |\n|-----------------|---------|---------------|\n| `YOUR_WORDPRESS_CREDENTIAL` | WordPress API | `POST /media`, `POST /posts` |\n| `YOUR_POSTGRES_CREDENTIAL` | PostgreSQL access for used categories | DB + table created in step 3 |\n| `YOUR_OPENAI_CREDENTIAL` | OpenAI key for GPT | GPT-4-mini or better |\n\n🧠 Keep the names **exactly** — the workflow references them directly.\n\n---\n\n### 3 · POSTGRESQL (one-time bootstrap)\n\n### 🖥️ Terminal method (fastest — paste into `sudo -u postgres psql`)\n\n```sql\n-- 3-A · Create database and user\nCREATE DATABASE n8n_blog;\nCREATE USER n8n_writer WITH PASSWORD 'S3cur3-Pa55';\nGRANT ALL PRIVILEGES ON DATABASE n8n_blog TO n8n_writer;\n\\c n8n_blog n8n_writer  -- Reconnect to DB as the new user\n\n-- 3-B · Create the tracking table\nCREATE TABLE IF NOT EXISTS public.used_categories (\n  category_id INTEGER PRIMARY KEY,\n  name        TEXT,\n  description TEXT,\n  title       TEXT,\n  used_at     TIMESTAMPTZ\n);\nGRANT INSERT, UPDATE, SELECT ON public.used_categories TO n8n_writer;\n```\n\n### 🔗 Then configure the credential in n8n\n\n```\nName:       YOUR_POSTGRES_CREDENTIAL\nHost:       127.0.0.1\nPort:       5432\nDatabase:   n8n_blog\nUser:       n8n_writer\nPassword:   S3cur3-Pa55\nSchema:     public\n```\n\n💡 No terminal access?  \nCreate a temporary **Postgres → Execute Query** node with the same SQL, run once, then delete it.\n\n---\n\n### 4 · FIRST TEST  \nRun the first 3–5 nodes manually to verify:\n- ✅ WordPress auth works  \n- ✅ DB connection + writing works  \n- ✅ GPT responds as expected  \n\nOnce confirmed, enable the **Schedule Trigger** to automate.\n\n---\n\n## ✅ WHAT THIS WORKFLOW DOES\n\n- Loads all WP categories and filters out excluded ones  \n- Picks the **least-used category** from your DB  \n- Generates a **unique, well-structured WP article** using GPT (TOC, blocks, CTA)  \n- Generates a **cover image** and uploads it to `/media`  \n- Publishes the post to `/posts` and updates usage in your PostgreSQL DB"
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        "content": "⏰ Triggers this workflow every few hours."
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        "content": "📥 Loads all WordPress categories."
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        "content": "🧹 Filters out excluded category IDs.\n\nChoose them yourself, some categories are not for AI Agent, like reviews or same"
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        "content": "🎯 Picks least-used category for next post."
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        "content": "📄 Loads 10 latest article titles for the selected category."
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        "content": "🧾 Prepares the new article title."
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        "content": "📦 Combines all post metadata into one object."
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        "content": "📝 Saves used category and title to DB."
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        "width": 300,
        "height": 460,
        "content": "✍️ Writes full WordPress-style HTML article."
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      "position": [
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        "content": "🧾 Extracts content block from AI output."
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      "position": [
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      "parameters": {
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        "content": "🖼 Prepares a placeholder cover image URL."
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      "position": [
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        "width": 220,
        "height": 360,
        "content": "⬇️ Downloads the cover image."
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    {
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      "name": "Note adhésive16",
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      "position": [
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        "width": 220,
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        "content": "📤 Uploads image to WordPress media."
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        "content": "🔗 Merges image + content + category info."
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      "position": [
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        "content": "📬 Prepares final JSON body for the WP post."
      },
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    {
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      "name": "Note adhésive19",
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      "position": [
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        "width": 220,
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        "content": "🚀 Publishes post to your WordPress site."
      },
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      "parameters": {
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        "width": 220,
        "height": 300,
        "content": "Make sure:\n- Your WordPress site allows public access to `/wp-json/wp/v2/categories`\n- You have at least 1 category created\n- No security plugin (like Wordfence) is blocking REST API\n\nNo credential needed for public category fetch."
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        "content": "Make sure:\n- You've created the table (see setup note)\n- Credential `YOUR_POSTGRES_CREDENTIAL` is configured\n- DB user has `SELECT` rights on the table\n\nTip: This selects the least recently used category for the next post."
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      "name": "Charger les catégories",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
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      "parameters": {
        "url": "={{ $json.domain }}/wp-json/wp/v2/categories?per_page=100 ",
        "options": {}
      },
      "typeVersion": 4.2
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      "id": "8b2cb2f8-2a2e-4e92-81b6-36e9e2105f94",
      "name": "Filtre de catégories",
      "type": "n8n-nodes-base.code",
      "position": [
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      "parameters": {
        "jsCode": "const excludeIds = [1, 11, 12, 13, 15, 17, 18, 36, 37, 38, 39];\n\nreturn $input.all()\n  .filter(item => !excludeIds.includes(item.json.id))\n  .map(item => {\n    const { id, name, description, link } = item.json;\n    return {\n      json: { id, name, description, link }\n    };\n  });\n"
      },
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    {
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      "name": "Sélection des récents",
      "type": "n8n-nodes-base.postgres",
      "position": [
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      "parameters": {
        "query": "SELECT category_id, MAX(used_at) AS last_used_at\nFROM used_categories\nGROUP BY category_id\nORDER BY last_used_at ASC;",
        "options": {},
        "operation": "executeQuery"
      },
      "credentials": {
        "postgres": {
          "id": "JKCOXnEh1Bqg4Gad",
          "name": "YOUR_POSTGRES_CREDENTIAL"
        }
      },
      "executeOnce": true,
      "typeVersion": 2.6,
      "alwaysOutputData": true
    },
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      "name": "Choix des moins utilisés",
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      "position": [
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      "parameters": {
        "jsCode": "const categories = $items(\"Category Filter\");\nconst usedRows = $items(\"Selecting recent\");\n\nif (!categories || categories.length === 0) {\n  throw new Error(\"No category in Code2\");\n}\n\nif (!usedRows || usedRows.length === 0) {\n  return [categories[0]];\n}\n\nconst usedMap = new Map(\n  usedRows.map(row => {\n    const id = row.json.category_id;\n    const time = new Date(row.json.last_used_at || row.json.used_at).getTime();\n    return [id, time];\n  })\n);\n\nlet selected = null;\nlet minTime = Infinity;\n\nfor (const cat of categories) {\n  const id = cat.json.id;\n  const lastUsed = usedMap.get(id) ?? 0;\n\n  if (lastUsed < minTime) {\n    minTime = lastUsed;\n    selected = cat;\n  }\n}\n\nreturn [selected || categories[0]];"
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      "parameters": {
        "query": "SELECT name, description \nFROM used_categories \nWHERE category_id = {{ $json.id }}\nORDER BY used_at DESC \nLIMIT 10;",
        "options": {},
        "operation": "executeQuery"
      },
      "credentials": {
        "postgres": {
          "id": "JKCOXnEh1Bqg4Gad",
          "name": "YOUR_POSTGRES_CREDENTIAL"
        }
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      "alwaysOutputData": true
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      "name": "Nouveau titre d'article",
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      "position": [
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      "parameters": {
        "jsCode": "return [\n  {\n    json: {\n      title: $input.first().json.output\n    }\n  }\n];\n"
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      "name": "Agent IA - En-têtes SEO",
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        "text": "=Based on the category \"{{ $('Picks Less Used').item.json.name }}\"  \nwith the description:  \n{{ $('Picks Less Used').item.json.description }}\n\nHere are existing article titles already published:  \n{{ $items(\"10 latest headlines\").map(i => i.json.description).join(\"\\n\") }}\n\nYour task:  \n- Come up with a **new unique article title** that fits this category  \n- The topic should be narrow, practical, and not duplicate any existing titles  \n- Make it clickable, relevant, and professional  \n- Do **not** reuse or partially copy old titles  \n- Style should be expert-level, insightful, and engaging — no clickbait\n\nImportant:  \n- Output **only** the new title (no extra words, no formatting)  \n- The title must be ready for publication as-is (plain text)",
        "options": {},
        "promptType": "define"
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      "name": "Agent IA - Rédacteur SEO",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
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