{
"name": "Generate C API HTML docs from Google Drive headers with GPT-4o and Gmail",
"nodes": [
{
"id": "8655873a-3376-45e4-8311-68a646570e47",
"name": "Extract from File2",
"type": "n8n-nodes-base.extractFromFile",
"position": [
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544
]
},
{
"id": "a0edb4ab-f3e6-4ff0-be75-a7ef3d6bfb39",
"name": "When clicking ‘Execute workflow’",
"type": "n8n-nodes-base.manualTrigger",
"position": [
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448
]
},
{
"id": "75a5f62e-1479-4845-84ce-283291ad65a5",
"name": "Sticky Note — Step 1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1520,
256
],
"parameters": {
"width": 560,
"height": 344,
"content": "### 📁 Step 1 — Load Files\nTrigger manually, then fetch all files from the configured Google Drive folder and filter down to `.h` files only.\n\n⚙️ **To configure:** Open **Get all files from folder** an"
}
},
{
"id": "046dba14-4d05-491a-a311-2446963de7dd",
"name": "Sticky Note — Step 8",
"type": "n8n-nodes-base.stickyNote",
"position": [
-848,
256
],
"parameters": {
"width": 252,
"height": 424,
"content": "### 🔁 Step 2 — Loop\nProcess one `.h` file at a time using **Split in Batches**.\n\nThe loop returns here after each file is saved to Drive, until all files are processed. When done, it branches to the e"
}
},
{
"id": "77d98362-d5c4-4be3-967d-da5fc59d573b",
"name": "Sticky Note — Step 9",
"type": "n8n-nodes-base.stickyNote",
"position": [
-464,
416
],
"parameters": {
"width": 372,
"height": 280,
"content": "### 📥 Step 3 — Download & Read\nDownloads the binary file from Google Drive and extracts its raw text content, ready to be sent to GPT-4o."
}
},
{
"id": "6493ac89-3f40-45eb-822f-988d82f4a570",
"name": "Sticky Note — Step 10",
"type": "n8n-nodes-base.stickyNote",
"position": [
0,
256
],
"parameters": {
"width": 248,
"height": 392,
"content": "### 🤖 Step 4 — AI Extraction\nSends the raw `.h` file content to **GPT-4o** with a structured prompt.\n\nGPT returns a strict JSON object with:\n`overview` · `functions` · `enumerators` · `data_types` · `"
}
},
{
"id": "11cab0db-26db-4a64-ae73-c7601eefdf75",
"name": "Sticky Note — Step 11",
"type": "n8n-nodes-base.stickyNote",
"position": [
288,
320
],
"parameters": {
"width": 224,
"height": 360,
"content": "### 🔧 Step 5 — Parse Response\nStrips any markdown fences from the GPT response and parses it as JSON.\n\n💡 If parsing fails, the raw GPT text is placed in `overview` so you can debug what GPT returned."
}
},
{
"id": "f248ab44-1130-49c1-90f2-ec65567cc480",
"name": "Sticky Note — Step 12",
"type": "n8n-nodes-base.stickyNote",
"position": [
560,
224
],
"parameters": {
"width": 244,
"height": 472,
"content": "### 🎨 Step 6 — Generate HTML\nBuilds a fully styled HTML documentation file with:\n- Sidebar navigation\n- Hero header with metadata\n- Function cards with signature, params table & examples\n- Data types,"
}
},
{
"id": "ebb3f0fc-5d41-4022-a8d2-58b7b951c215",
"name": "Sticky Note — Step 13",
"type": "n8n-nodes-base.stickyNote",
"position": [
848,
224
],
"parameters": {
"width": 252,
"height": 472,
"content": "### 💾 Step 7 — Save to Drive\nUploads the generated `DOC_filename.html` file to the configured output folder in Google Drive.\n\n⚙️ **To configure:** Update the `folderId` in this node with your output f"
}
},
{
"id": "0410927e-234a-46f5-aca6-a9a60eeb56d0",
"name": "Sticky Note — Email1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-480,
-32
],
"parameters": {
"width": 440,
"height": 340,
"content": "### ✉️ Completion Email\nOnce all files are processed, the **Split in Batches** node exits the loop and triggers this branch.\n\nBuilds a summary email and sends it via **Gmail** to notify that all docs "
}
},
{
"id": "240eb434-776f-4195-a456-15a83b8f5d5a",
"name": "Sticky Note — Overview1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1968,
80
],
"parameters": {
"width": 396,
"height": 678,
"content": "# 📄 API Documentation Generator\n\nAutomatically generates **beautiful HTML documentation** from C header (`.h`) files stored in Google Drive.\n\n**How it works:**\n1. Reads all files from a specified Goog"
}
},
{
"id": "f63de4ea-6d88-4f10-a195-feb2f7b5f3ea",
"name": "Get all files from folder",
"type": "n8n-nodes-base.googleDrive",
"position": [
-1328,
448
]
},
{
"id": "14c89229-0249-4e47-a46c-1480e961b59c",
"name": "Filter .h files only",
"type": "n8n-nodes-base.code",
"position": [
-1104,
448
]
},
{
"id": "b2362399-2709-42d6-a294-5d834562a4b7",
"name": "Process one file at a time",
"type": "n8n-nodes-base.splitInBatches",
"position": [
-768,
528
]
},
{
"id": "e74de2b2-e2bf-4e9f-b191-e703a914cb15",
"name": "Download file",
"type": "n8n-nodes-base.googleDrive",
"position": [
-432,
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]
},
{
"id": "477c9a71-e6b8-4125-8dca-9987320fda1a",
"name": "Build email body",
"type": "n8n-nodes-base.code",
"position": [
-400,
160
]
},
{
"id": "e350754f-4db4-407b-a6d0-ce199df685bd",
"name": "Send completion email",
"type": "n8n-nodes-base.gmail",
"position": [
-192,
160
]
},
{
"id": "8e43b277-9554-43e2-bc04-db84eadb6b51",
"name": "Extract structured docs (GPT-4o)",
"type": "@n8n/n8n-nodes-langchain.openAi",
"position": [
16,
544
]
},
{
"id": "f463a4fa-5996-4e9d-8f10-bc2f9c54d4ad",
"name": "Parse JSON response",
"type": "n8n-nodes-base.code",
"position": [
352,
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]
},
{
"id": "f7a197b7-3470-4ad5-a2bb-fa913c461969",
"name": "Generate HTML",
"type": "n8n-nodes-base.code",
"position": [
608,
544
]
},
{
"id": "0b63f327-e409-4fe9-8716-bf4d53697441",
"name": "Save PDF to Google Drive",
"type": "n8n-nodes-base.googleDrive",
"position": [
928,
544
]
}
],
"connections": {
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"type": "main",
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},
"Generate HTML": {
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"node": "Save PDF to Google Drive",
"type": "main",
"index": 0
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},
"Build email body": {
"main": [
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"node": "Send completion email",
"type": "main",
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"Filter .h files only": {
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},
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"node": "Get all files from folder",
"type": "main",
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}
}
}