{ "meta": { "templateCredsSetupCompleted": true }, "nodes": [ { "id": "b2e36298-1403-4867-9111-dacb7fed0765", "name": "Manual Trigger", "type": "n8n-nodes-base.manualTrigger", "position": [ 2816, 1344 ], "parameters": {}, "typeVersion": 1 }, { "id": "07a14a83-a942-4108-aa92-b8a018929632", "name": "Sticky Note - Overview", "type": "n8n-nodes-base.stickyNote", "position": [ 2448, 512 ], "parameters": { "color": 7, "width": 512, "height": 400, "content": "# Batch Ad Banner Generator\n\nFlow:\n\nGoogle Sheets - Read Jobs \n\u2192 Google Drive - Download Source Image \n\u2192 OpenAI - Edit image \n\u2192 Code - Build Banner Sizes With Sharp \n\u2192 Google Drive - Upload Banner \n\u2192 Google Sheets - Update Result\n\nThis version assumes the source image already exists in Google Drive. \nThe Google Sheet row should contain the source image file ID." }, "typeVersion": 1 }, { "id": "1879dfc7-dfbd-4223-b16e-334e3fdc9e31", "name": "Sticky Note - Sheet Format", "type": "n8n-nodes-base.stickyNote", "position": [ 2976, 512 ], "parameters": { "width": 480, "height": 1008, "content": "# Google Sheets columns\n\nRequired input columns:\n\n`id` \nUnique job ID.\n\n`status` \nUse `pending`, `todo`, or `new`.\n\n`source_file_id` \nGoogle Drive file ID of the source image.\n\n`prompt` \nGeneral campaign prompt or edit direction.\n\n`headline` \nOptional overlay text for larger banners.\n\n`subheadline` \nOptional secondary text.\n\n`cta` \nOptional call-to-action.\n\n`target_sizes` \nExample:\n`300x250,728x90,160x600,320x100,300x50,970x250`\n\n`output_folder_id` \nGoogle Drive folder ID for final banners.\n\n`edit_instruction` \nPrompt for OpenAI Edit image.\n\nOutput columns:\n\n`generated_at` \n`output_links` \n`output_files` \n`status`" }, "typeVersion": 1 }, { "id": "de0bef11-36ed-41a4-bc1e-7c4ea1590ad4", "name": "Sticky Note - Sharp Setup", "type": "n8n-nodes-base.stickyNote", "position": [ 4208, 944 ], "parameters": { "color": 4, "width": 704, "height": 576, "content": "# sharp setup\n\nThe Code node uses `sharp` to crop and resize banners exactly.\n\nFor self-hosted n8n:\n\n```bash\nNODE_FUNCTION_ALLOW_EXTERNAL=sharp\nnpm install sharp\n```\n\nFor Docker, install `sharp` inside the n8n container or build a custom image.\n\nIf you use n8n Cloud and external packages are not available, replace the sharp Code node with an external image-processing API." }, "typeVersion": 1 }, { "id": "9564d473-bd00-48bc-83df-6f224aed5ec9", "name": "Google Sheets - Read Jobs", "type": "n8n-nodes-base.googleSheets", "notes": "Expected columns: id, status, source_file_id, prompt, headline, subheadline, cta, target_sizes, output_folder_id, edit_instruction", "position": [ 3056, 1344 ], "parameters": { "options": {}, "sheetName": "={{$env.GOOGLE_SHEET_NAME || 'Sheet1'}}", "documentId": "={{$env.GOOGLE_SHEET_ID || 'PASTE_YOUR_GOOGLE_SHEET_ID_HERE'}}" }, "typeVersion": 4.5 }, { "id": "5848a4e5-2015-4b8c-bd8b-8c7c77e6c4d2", "name": "Code - Normalize Pending Rows", "type": "n8n-nodes-base.code", "position": [ 3296, 1344 ], "parameters": { "jsCode": "\nconst rows = $input.all();\n\nreturn rows\n .map((item, index) => {\n const j = item.json;\n\n const status = String(j.status || '').trim().toLowerCase();\n if (status && !['pending', 'todo', 'new'].includes(status)) return null;\n\n const sourceFileId = j.source_file_id || j.sourceFileId || j.file_id || j.fileId;\n if (!sourceFileId) {\n throw new Error(`Missing source_file_id on row ${index + 2}`);\n }\n\n const rawSizes = String(j.target_sizes || '300x250,728x90,160x600,320x100,300x50,970x250');\n const sizes = rawSizes\n .split(',')\n .map(s => s.trim())\n .filter(Boolean)\n .map(s => {\n const m = s.match(/(\\d+)\\s*x\\s*(\\d+)/i);\n if (!m) return null;\n return { label: `${m[1]}x${m[2]}`, width: Number(m[1]), height: Number(m[2]) };\n })\n .filter(Boolean);\n\n if (!sizes.length) {\n throw new Error(`No valid target_sizes on row ${index + 2}`);\n }\n\n const editInstruction = j.edit_instruction || j.editInstruction || j.prompt || \n 'Improve this ad image while keeping the original product, brand feeling, and commercial layout.';\n\n return {\n json: {\n rowNumber: j.row_number || j.rowNumber || index + 2,\n id: j.id || `job-${Date.now()}-${index}`,\n sourceFileId,\n prompt: j.prompt || '',\n editInstruction,\n headline: j.headline || '',\n subheadline: j.subheadline || '',\n cta: j.cta || '',\n sizes,\n outputFolderId: j.output_folder_id || j.outputFolderId || $env.GOOGLE_DRIVE_OUTPUT_FOLDER_ID || 'PASTE_OUTPUT_FOLDER_ID_HERE'\n }\n };\n })\n .filter(Boolean);\n" }, "typeVersion": 2 }, { "id": "847a0482-a9f9-4dc2-845b-1531a0b07f98", "name": "Split In Batches", "type": "n8n-nodes-base.splitInBatches", "position": [ 3536, 1344 ], "parameters": { "options": {} }, "typeVersion": 3 }, { "id": "7003c3b6-bb8a-453d-acf7-7ee5e387673e", "name": "Google Drive - Download Source Image", "type": "n8n-nodes-base.googleDrive", "notes": "Downloads source image from Google Drive into binary field named image.", "position": [ 3776, 1344 ], "parameters": { "fileId": "={{$json.sourceFileId}}", "options": { "binaryPropertyName": "image" }, "operation": "download" }, "typeVersion": 3 }, { "id": "aa578baf-24e6-491e-8992-95a37e9ea145", "name": "Edit image", "type": "@n8n/n8n-nodes-langchain.openAi", "notes": "Native n8n OpenAI image edit node. Input binary property should be image.", "position": [ 4016, 1344 ], "parameters": { "images": { "values": [ { "binaryPropertyName": "image" } ] }, "prompt": "={{$json.editInstruction}}", "options": {}, "resource": "image", "operation": "edit" }, "credentials": { "openAiApi": { "name": "" } }, "typeVersion": 2.1 }, { "id": "f707521c-3af3-49fa-bafc-6b33f930b9d8", "name": "Code - Build Banner Sizes With Sharp", "type": "n8n-nodes-base.code", "notes": "Uses edited image binary if available; otherwise falls back to downloaded source image. Outputs each banner as binary field `banner`.", "position": [ 4272, 1344 ], "parameters": { "jsCode": "\nconst sharp = require('sharp');\n\n// Some OpenAI image-edit node versions return binary directly.\n// This node normalizes the binary field to `image` and preserves the job JSON.\nconst current = $input.first();\nconst sourceJob = $('Split In Batches').first().json;\n\nlet imageBinary = null;\n\n// Prefer edited image from OpenAI node.\nif (current.binary) {\n if (current.binary.image) imageBinary = current.binary.image;\n else {\n const firstKey = Object.keys(current.binary)[0];\n if (firstKey) imageBinary = current.binary[firstKey];\n }\n}\n\n// Fallback: use original downloaded source image if OpenAI node output format is different.\nif (!imageBinary) {\n const downloaded = $('Google Drive - Download Source Image').first();\n if (downloaded.binary?.image) imageBinary = downloaded.binary.image;\n}\n\nif (!imageBinary?.data) {\n throw new Error('No image binary found. Check Google Drive download binary property and OpenAI Edit image output.');\n}\n\nconst sourceBuffer = Buffer.from(imageBinary.data, 'base64');\nconst meta = await sharp(sourceBuffer).metadata();\n\nconst sizes = sourceJob.sizes || [];\nconst outputItems = [];\n\nfunction escapeXml(str) {\n return String(str || '').replace(/[<>&\\\"']/g, c => ({\n '<': '<',\n '>': '>',\n '&': '&',\n '\"': '"',\n \"'\": '''\n }[c]));\n}\n\nfunction truncateText(str, maxChars) {\n const s = String(str || '').trim();\n if (s.length <= maxChars) return s;\n return s.slice(0, Math.max(0, maxChars - 1)) + '\u2026';\n}\n\nfor (const size of sizes) {\n const w = Number(size.width);\n const h = Number(size.height);\n const aspect = w / h;\n const sourceAspect = meta.width / meta.height;\n\n let cropWidth = meta.width;\n let cropHeight = meta.height;\n\n if (sourceAspect > aspect) {\n cropWidth = Math.round(meta.height * aspect);\n } else {\n cropHeight = Math.round(meta.width / aspect);\n }\n\n const left = Math.max(0, Math.round((meta.width - cropWidth) / 2));\n const top = Math.max(0, Math.round((meta.height - cropHeight) / 2));\n\n let img = sharp(sourceBuffer)\n .extract({ left, top, width: cropWidth, height: cropHeight })\n .resize(w, h, { fit: 'cover', position: 'centre' });\n\n const headline = escapeXml(truncateText(sourceJob.headline, Math.max(12, Math.floor(w / 18))));\n const subheadline = escapeXml(truncateText(sourceJob.subheadline, Math.max(18, Math.floor(w / 12))));\n const cta = escapeXml(truncateText(sourceJob.cta, Math.max(10, Math.floor(w / 24))));\n\n // Only add overlay text when there is enough room.\n if ((headline || cta) && w >= 250 && h >= 90) {\n const headlineSize = Math.max(18, Math.min(52, Math.round(w / 14)));\n const subSize = Math.max(12, Math.min(28, Math.round(w / 28)));\n const ctaSize = Math.max(12, Math.min(24, Math.round(w / 30)));\n\n const overlay = Buffer.from(`\n \n \n ${headline ? `${headline}` : ''}\n ${subheadline && h >= 180 ? `${subheadline}` : ''}\n ${cta ? `${cta}` : ''}\n \n `);\n\n img = img.composite([{ input: overlay, top: 0, left: 0 }]);\n }\n\n const out = await img.png().toBuffer();\n const fileName = `${sourceJob.id}-${size.label}.png`;\n\n outputItems.push({\n json: {\n ...sourceJob,\n bannerSize: size.label,\n width: w,\n height: h,\n fileName,\n mimeType: 'image/png'\n },\n binary: {\n banner: {\n data: out.toString('base64'),\n mimeType: 'image/png',\n fileName\n }\n }\n });\n}\n\nreturn outputItems;\n" }, "typeVersion": 2 }, { "id": "238e00f6-5a1b-4bcc-9054-72ddcdf6bf79", "name": "Google Drive - Upload Banner", "type": "n8n-nodes-base.googleDrive", "position": [ 4528, 1344 ], "parameters": { "name": "={{$json.fileName}}", "driveId": "myDrive", "options": {}, "folderId": "={{$json.outputFolderId}}" }, "typeVersion": 3 }, { "id": "654e2454-77df-48b6-8ee1-f2fae1d9cea6", "name": "Code - Collect Upload Links", "type": "n8n-nodes-base.code", "position": [ 4768, 1344 ], "parameters": { "jsCode": "\nconst uploads = $input.all();\n\nconst byJob = {};\nfor (const item of uploads) {\n const j = item.json;\n const id = j.id;\n\n if (!byJob[id]) {\n byJob[id] = {\n id,\n status: 'done',\n generated_at: new Date().toISOString(),\n output_links: [],\n output_files: []\n };\n }\n\n const link = j.webViewLink || j.webContentLink || j.url || j.fileUrl || j.id || '';\n byJob[id].output_links.push(`${j.bannerSize}: ${link}`);\n byJob[id].output_files.push(j.fileName);\n}\n\nreturn Object.values(byJob).map(j => ({\n json: {\n id: j.id,\n status: j.status,\n generated_at: j.generated_at,\n output_links: j.output_links.join('\\n'),\n output_files: j.output_files.join(', ')\n }\n}));\n" }, "typeVersion": 2 }, { "id": "fe2380df-7151-4d16-8f54-aadeb34cf4d1", "name": "Google Sheets - Update Result", "type": "n8n-nodes-base.googleSheets", "position": [ 5008, 1344 ], "parameters": { "columns": { "value": { "id": "={{$json.id}}", "status": "={{$json.status}}", "generated_at": "={{$json.generated_at}}", "output_files": "={{$json.output_files}}", "output_links": "={{$json.output_links}}" }, "schema": [], "mappingMode": "defineBelow", "matchingColumns": [ "id" ] }, "options": {}, "operation": "appendOrUpdate", "sheetName": "={{$env.GOOGLE_SHEET_NAME || 'Sheet1'}}", "documentId": "={{$env.GOOGLE_SHEET_ID || 'PASTE_YOUR_GOOGLE_SHEET_ID_HERE'}}" }, "typeVersion": 4.5 } ], "connections": { "Edit image": { "main": [ [ { "node": "Code - Build Banner Sizes With Sharp", "type": "main", "index": 0 } ] ] }, "Manual Trigger": { "main": [ [ { "node": "Google Sheets - Read Jobs", "type": "main", "index": 0 } ] ] }, "Split In Batches": { "main": [ [ { "node": "Google Drive - Download Source Image", "type": "main", "index": 0 } ] ] }, "Google Sheets - Read Jobs": { "main": [ [ { "node": "Code - Normalize Pending Rows", "type": "main", "index": 0 } ] ] }, "Code - Collect Upload Links": { "main": [ [ { "node": "Google Sheets - Update Result", "type": "main", "index": 0 } ] ] }, "Google Drive - Upload Banner": { "main": [ [ { "node": "Code - Collect Upload Links", "type": "main", "index": 0 } ] ] }, "Code - Normalize Pending Rows": { "main": [ [ { "node": "Split In Batches", "type": "main", "index": 0 } ] ] }, "Code - Build Banner Sizes With Sharp": { "main": [ [ { "node": "Google Drive - Upload Banner", "type": "main", "index": 0 } ] ] }, "Google Drive - Download Source Image": { "main": [ [ { "node": "Edit image", "type": "main", "index": 0 } ] ] } } }