{ "id": "Fx0ytkSOkBSHuM35", "meta": { "templateCredsSetupCompleted": true }, "name": "Lecture to WhatsApp Study Digest", "tags": [], "nodes": [ { "id": "6ae5434f-7bdd-482f-a05f-e379fc8d6e41", "name": "Overview", "type": "n8n-nodes-base.stickyNote", "position": [ -2000, -432 ], "parameters": { "color": 4, "width": 572, "height": 1172, "content": "## Lecture to WhatsApp Study Digest \u2014 WayinVideo Summarization + GPT-4o-mini + Twilio + Google Sheets\n\nFor college students who want an instant study digest from any lecture video \u2014 delivered to WhatsApp in minutes. A student submits a lecture URL via form along with their WhatsApp number, subject, and whether it is an exam revision session. The WayinVideo Summarization API processes the video and extracts a full summary with highlights and tags. After a 90-second initial wait, the results endpoint is polled every 30 seconds until status is SUCCEEDED. GPT-4o-mini reads the summary and generates 5 key learning points, 3 exam-important concepts, and one never-forget line. A Code node builds the formatted WhatsApp message. Twilio sends it directly to the student's WhatsApp number. Google Sheets logs the digest for future reference.\n\n## How it works\n- **1. Form \u2014 Student Request** collects name, WhatsApp number, subject name, lecture video URL (YouTube, Zoom, Vimeo, Loom), and exam revision flag\n- **2. Code \u2014 Validate and Prepare** validates required fields, formats the phone number for Twilio WhatsApp (whatsapp:+countrycode format), and sets the exam tag\n- **3. HTTP \u2014 WayinVideo Submit Summarization** posts the video URL to the WayinVideo Summarization API with Authorization Bearer header and API version header\n- **4. Wait \u2014 90 Seconds** gives WayinVideo initial processing time before first poll\n- **5. HTTP \u2014 WayinVideo Get Summary Results** polls the results endpoint using the task ID from node 3\n- **6. IF \u2014 Summary Ready?** checks if status equals SUCCEEDED \u2014 TRUE: proceeds to AI | FALSE: 30-second retry wait then re-polls\n- **7. Wait \u2014 30 Second Retry** waits before re-polling\n- **8. AI Agent \u2014 Generate Study Digest** uses GPT-4o-mini to extract 5 key points, 3 exam-important concepts, and one never-forget line from the summary\n- **OpenAI \u2014 GPT-4o-mini Model** language model attached to the AI Agent\n- **9. Code \u2014 Build WhatsApp Message** parses the AI output sections and builds the formatted WhatsApp message with separators and labels\n- **10. HTTP \u2014 Send WhatsApp via Twilio** and **11. Google Sheets \u2014 Save Digest** run in parallel \u2014 Twilio sends the WhatsApp message, Sheets logs the record\n\n## Set up steps\n1. Sign up at wayin.ai \u2192 Dashboard \u2192 API Keys \u2192 Create new key. Replace `YOUR_WAYINVIDEO_API_KEY` in nodes 3 and 5. Supported video sources: YouTube, Zoom, Vimeo, Loom\n2. In **OpenAI \u2014 GPT-4o-mini Model** \u2014 connect your OpenAI API credential\n3. Sign up at twilio.com. For testing use the WhatsApp Sandbox: Console \u2192 Messaging \u2192 Try it Out \u2192 WhatsApp (recipients must send the join code once). Replace `YOUR_TWILIO_ACCOUNT_SID` and `YOUR_TWILIO_AUTH_TOKEN` in node 10. Replace `YOUR_TWILIO_WHATSAPP_NUMBER` in node 10 (format: +1234567890)\n4. In **11. Google Sheets \u2014 Save Digest** \u2014 connect Google Sheets OAuth2 credential and replace `YOUR_GOOGLE_SHEET_ID`. Create a sheet tab named Lecture Digests with columns: Student, Phone, Subject, Video URL, Key Points, Exam Concepts, Exam Tag, Date" }, "typeVersion": 1 }, { "id": "2be14fcf-c8f9-4caa-810c-327d6d3894f5", "name": "Section \u2014 Student Request Form and Data Preparation", "type": "n8n-nodes-base.stickyNote", "position": [ -1360, -112 ], "parameters": { "color": 5, "width": 420, "height": 388, "content": "## Student Request Form and Data Preparation\nForm collects lecture URL, WhatsApp number, subject, and exam flag. Code validates inputs and formats the phone number for Twilio WhatsApp delivery." }, "typeVersion": 1 }, { "id": "65830ab0-f5a8-4e92-bece-17ab619b641b", "name": "Section \u2014 WayinVideo Summarization Submit and Poll Loop", "type": "n8n-nodes-base.stickyNote", "position": [ -848, -176 ], "parameters": { "color": 6, "width": 1012, "height": 676, "content": "## WayinVideo Summarization Submit and Poll Loop\nHTTP posts the video URL to WayinVideo. After 90s initial wait, results are polled every 30s until status equals SUCCEEDED. task ID referenced from node 3 output throughout the loop." }, "typeVersion": 1 }, { "id": "c96a2c28-00d2-4ddd-9085-a6ee4812216f", "name": "Section \u2014 GPT-4o-mini Digest Generation and WhatsApp Message Build", "type": "n8n-nodes-base.stickyNote", "position": [ 288, -208 ], "parameters": { "color": 6, "width": 420, "height": 772, "content": "## GPT-4o-mini Digest Generation and WhatsApp Message Build\nGPT-4o-mini extracts 5 key points, 3 exam concepts, and one never-forget line from the summary. Code builds the formatted WhatsApp message with section separators." }, "typeVersion": 1 }, { "id": "b3fc9ebe-35c9-43f5-ba53-b9391e914438", "name": "Section \u2014 WhatsApp Send and Sheets Log", "type": "n8n-nodes-base.stickyNote", "position": [ 800, -160 ], "parameters": { "color": 4, "width": 324, "height": 580, "content": "## WhatsApp Send and Sheets Log\nTwilio and Sheets run in parallel from node 9. Twilio sends the digest to the student WhatsApp number. Sheets logs the full record." }, "typeVersion": 1 }, { "id": "287af505-44bc-44a2-9782-c1632a32642b", "name": "1. Form \u2014 Student Request", "type": "n8n-nodes-base.formTrigger", "position": [ -1328, 48 ], "parameters": { "options": {}, "formTitle": "Lecture to WhatsApp Digest", "formFields": { "values": [ { "fieldLabel": "Your Name", "placeholder": "e.g. Rahul Sharma", "requiredField": true }, { "fieldLabel": "WhatsApp Number", "placeholder": "With country code \u2014 e.g. +919876543210", "requiredField": true }, { "fieldLabel": "Subject Name", "placeholder": "e.g. Thermodynamics, Machine Learning", "requiredField": true }, { "fieldLabel": "Lecture Video URL", "placeholder": "YouTube, Zoom, Vimeo or Loom link", "requiredField": true }, { "fieldLabel": "Exam Revision?", "placeholder": "Yes or No", "requiredField": true } ] }, "formDescription": "Paste your professor's lecture URL. You will get 5 key points and 3 exam concepts on WhatsApp in minutes." }, "typeVersion": 2.2 }, { "id": "29454c6c-f33f-4c63-8aa6-c78e06266f73", "name": "2. Code \u2014 Validate and Prepare", "type": "n8n-nodes-base.code", "position": [ -1088, 48 ], "parameters": { "jsCode": "const row = $json;\n\nconst studentName = (row['Your Name'] || '').trim();\nconst phoneRaw = (row['WhatsApp Number'] || '').trim();\nconst subject = (row['Subject Name'] || '').trim();\nconst videoUrl = (row['Lecture Video URL'] || '').trim();\nconst examRevision = (row['Exam Revision?'] || 'No').trim();\n\nif (!studentName || !phoneRaw || !videoUrl) {\n throw new Error('Name, WhatsApp Number, and Video URL are required.');\n}\n\nlet phone = phoneRaw.replace(/[\\s\\-\\(\\)]/g, '');\nif (!phone.startsWith('+')) phone = '+' + phone;\nconst whatsappTo = 'whatsapp:' + phone;\n\nconst examTag = examRevision.toLowerCase() === 'yes' ? 'EXAM IMPORTANT' : 'Regular Lecture';\n\nreturn [{ json: { studentName, phone, whatsappTo, subject, videoUrl, examRevision, examTag } }];" }, "typeVersion": 2 }, { "id": "f32624ba-676a-45c8-82b1-edb9059ff75c", "name": "3. HTTP \u2014 WayinVideo Submit Summarization", "type": "n8n-nodes-base.httpRequest", "position": [ -768, 48 ], "parameters": { "url": "https://wayinvideo-api.wayin.ai/api/v2/summaries", "method": "POST", "options": {}, "jsonBody": "={\n \"video_url\": \"{{ $json.videoUrl }}\",\n \"target_lang\": \"en\"\n}", "sendBody": true, "sendHeaders": true, "specifyBody": "json", "headerParameters": { "parameters": [ { "name": "Authorization", "value": "Bearer YOUR_WAYINVIDEO_API_KEY" }, { "name": "x-wayinvideo-api-version", "value": "v2" }, { "name": "Content-Type", "value": "application/json" } ] } }, "typeVersion": 4.2 }, { "id": "9c9d616f-a86f-498f-9b62-86d4bcb7ad1b", "name": "4. Wait \u2014 90 Seconds", "type": "n8n-nodes-base.wait", "position": [ -528, 48 ], "parameters": { "amount": 90 }, "typeVersion": 1.1 }, { "id": "f577d160-4600-461a-9903-008c2ad06517", "name": "5. HTTP \u2014 WayinVideo Get Summary Results", "type": "n8n-nodes-base.httpRequest", "position": [ -288, 48 ], "parameters": { "url": "=https://wayinvideo-api.wayin.ai/api/v2/summaries/results/{{ $('3. HTTP \u2014 WayinVideo Submit Summarization').first().json.data.id }}", "options": {}, "sendHeaders": true, "headerParameters": { "parameters": [ { "name": "Authorization", "value": "Bearer YOUR_WAYINVIDEO_API_KEY" }, { "name": "x-wayinvideo-api-version", "value": "v2" } ] } }, "typeVersion": 4.2 }, { "id": "679f39b6-78c2-4fff-afd4-b789dd42a3df", "name": "6. IF \u2014 Summary Ready?", "type": "n8n-nodes-base.if", "position": [ -48, 48 ], "parameters": { "options": {}, "conditions": { "options": { "version": 1, "leftValue": "", "caseSensitive": true, "typeValidation": "loose" }, "combinator": "and", "conditions": [ { "id": "status-check", "operator": { "type": "string", "operation": "equals" }, "leftValue": "={{ $json.data.status }}", "rightValue": "SUCCEEDED" } ] } }, "typeVersion": 2 }, { "id": "828375e3-2cf9-4786-b606-18cb37a72517", "name": "7. Wait \u2014 30 Second Retry", "type": "n8n-nodes-base.wait", "position": [ -48, 224 ], "parameters": { "amount": 30 }, "typeVersion": 1.1 }, { "id": "f89f1767-8a75-4ff9-86e6-af0b3005190c", "name": "8. AI Agent \u2014 Generate Study Digest", "type": "@n8n/n8n-nodes-langchain.agent", "position": [ 336, 32 ], "parameters": { "text": "=Subject: {{ $('2. Code \u2014 Validate and Prepare').item.json.subject }}\n\nSummary:\n{{ $json.data.summary }}\n\nHighlights:\n{{ $json.data.highlights.map((h, i) => (i+1) + '. ' + h.desc).join('\\n') }}\n\nTags: {{ $json.data.tags.join(', ') }}", "options": { "systemMessage": "You are a college study coach. From the lecture summary provided, extract exactly:\n- 5 key learning points (one sentence each, max 20 words)\n- 3 exam-important concepts (concept name + why it is exam-important, max 20 words each)\n- One never-forget line (the single most important thing from this lecture)\n\nReturn in this EXACT format:\n\nKEY_POINTS:\n1. [point]\n2. [point]\n3. [point]\n4. [point]\n5. [point]\n\nEXAM_CONCEPTS:\n[Concept name] \u2014 [why exam important]\n[Concept name] \u2014 [why exam important]\n[Concept name] \u2014 [why exam important]\n\nNEVER_FORGET:\n[single most important line from this lecture]\n\nBe specific. Extract only from the summary provided. No invented content." }, "promptType": "define" }, "typeVersion": 1.9 }, { "id": "d68b10ec-7bb6-40e1-a3ae-adec3cb8d12e", "name": "OpenAI \u2014 GPT-4o-mini Model", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [ 336, 208 ], "parameters": { "model": { "__rl": true, "mode": "list", "value": "gpt-4o-mini" }, "options": {}, "builtInTools": {} }, "typeVersion": 1.3 }, { "id": "e6b1a1f5-bd11-42a4-bbf1-ce78a5f934ce", "name": "9. Code \u2014 Build WhatsApp Message", "type": "n8n-nodes-base.code", "position": [ 576, 32 ], "parameters": { "jsCode": "const output = $input.first().json.output || '';\n\nconst kpMatch = output.match(/KEY_POINTS:\\s*([\\s\\S]*?)(?=\\nEXAM_CONCEPTS:|$)/);\nconst ecMatch = output.match(/EXAM_CONCEPTS:\\s*([\\s\\S]*?)(?=\\nNEVER_FORGET:|$)/);\nconst nfMatch = output.match(/NEVER_FORGET:\\s*([\\s\\S]*)$/);\n\nconst keyPoints = kpMatch ? kpMatch[1].trim() : '';\nconst examConcepts = ecMatch ? ecMatch[1].trim() : '';\nconst neverForget = nfMatch ? nfMatch[1].trim() : '';\n\nconst ctx = $('2. Code \u2014 Validate and Prepare').item.json;\nconst subject = ctx.subject;\nconst examTag = ctx.examTag;\nconst whatsappTo = ctx.whatsappTo;\nconst studentName = ctx.studentName;\nconst phone = ctx.phone;\nconst videoUrl = ctx.videoUrl;\nconst examRevision = ctx.examRevision;\n\nconst message = [\n `*Study Digest \u2014 ${subject}*`,\n `${examTag}`,\n ``,\n `\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501`,\n `*5 KEY POINTS*`,\n `\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501`,\n keyPoints,\n ``,\n `\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501`,\n `*EXAM IMPORTANT*`,\n `\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501`,\n examConcepts,\n ``,\n `*NEVER FORGET:*`,\n neverForget\n].join('\\n');\n\nreturn [{ json: { message, keyPoints, examConcepts, neverForget, whatsappTo, studentName, phone, subject, videoUrl, examTag, examRevision } }];" }, "typeVersion": 2 }, { "id": "fcd8e680-98d8-417c-9346-4ecd56fd8c4b", "name": "10. HTTP \u2014 Send WhatsApp via Twilio", "type": "n8n-nodes-base.httpRequest", "position": [ 912, 0 ], "parameters": { "url": "=https://api.twilio.com/2010-04-01/Accounts/YOUR_TWILIO_ACCOUNT_SID/Messages.json", "method": "POST", "options": {}, "sendBody": true, "contentType": "form-urlencoded", "sendHeaders": true, "bodyParameters": { "parameters": [ { "name": "To", "value": "={{ $json.whatsappTo }}" }, { "name": "From", "value": "whatsapp:YOUR_TWILIO_WHATSAPP_NUMBER" }, { "name": "Body", "value": "={{ $json.message }}" } ] }, "headerParameters": { "parameters": [ { "name": "Authorization", "value": "=Basic {{ Buffer.from('YOUR_TWILIO_ACCOUNT_SID:YOUR_TWILIO_AUTH_TOKEN').toString('base64') }}" }, { "name": "Content-Type", "value": "application/x-www-form-urlencoded" } ] } }, "typeVersion": 4.2 }, { "id": "a19c2591-1f8b-4910-9c23-fdaee07f8aa7", "name": "11. Google Sheets \u2014 Save Digest", "type": "n8n-nodes-base.googleSheets", "position": [ 912, 176 ], "parameters": { "columns": { "value": { "Date": "={{ $now.toFormat('dd MMM yyyy HH:mm') }}", "Phone": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.phone }}", "Student": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.studentName }}", "Subject": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.subject }}", "Exam Tag": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.examTag }}", "Video URL": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.videoUrl }}", "Key Points": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.keyPoints }}", "Exam Concepts": "={{ $('9. Code \u2014 Build WhatsApp Message').item.json.examConcepts }}" }, "schema": [ { "id": "Student", "type": "string", "display": true, "required": false, "displayName": "Student", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Phone", "type": "string", "display": true, "required": false, "displayName": "Phone", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Subject", "type": "string", "display": true, "required": false, "displayName": "Subject", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Video URL", "type": "string", "display": true, "required": false, "displayName": "Video URL", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Key Points", "type": "string", "display": true, "required": false, "displayName": "Key Points", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Exam Concepts", "type": "string", "display": true, "required": false, "displayName": "Exam Concepts", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Exam Tag", "type": "string", "display": true, "required": false, "displayName": "Exam Tag", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Date", "type": "string", "display": true, "required": false, "displayName": "Date", "defaultMatch": false, "canBeUsedToMatch": true } ], "mappingMode": "defineBelow", "matchingColumns": [], "attemptToConvertTypes": false, "convertFieldsToString": true }, "options": {}, "operation": "append", "sheetName": { "__rl": true, "mode": "name", "value": "Lecture Digests" }, "documentId": { "__rl": true, "mode": "id", "value": "YOUR_GOOGLE_SHEET_ID" } }, "typeVersion": 4.5 } ], "active": false, "settings": { "binaryMode": "separate", "executionOrder": "v1" }, "versionId": "b415286c-1562-4526-9a29-b892d391c532", "connections": { "4. Wait \u2014 90 Seconds": { "main": [ [ { "node": "5. HTTP \u2014 WayinVideo Get Summary Results", "type": "main", "index": 0 } ] ] }, "6. IF \u2014 Summary Ready?": { "main": [ [ { "node": "8. AI Agent \u2014 Generate Study Digest", "type": "main", "index": 0 } ], [ { "node": "7. Wait \u2014 30 Second Retry", "type": "main", "index": 0 } ] ] }, "1. Form \u2014 Student Request": { "main": [ [ { "node": "2. Code \u2014 Validate and Prepare", "type": "main", "index": 0 } ] ] }, "7. Wait \u2014 30 Second Retry": { "main": [ [ { "node": "5. HTTP \u2014 WayinVideo Get Summary Results", "type": "main", "index": 0 } ] ] }, "OpenAI \u2014 GPT-4o-mini Model": { "ai_languageModel": [ [ { "node": "8. AI Agent \u2014 Generate Study Digest", "type": "ai_languageModel", "index": 0 } ] ] }, "2. Code \u2014 Validate and Prepare": { "main": [ [ { "node": "3. HTTP \u2014 WayinVideo Submit Summarization", "type": "main", "index": 0 } ] ] }, "9. Code \u2014 Build WhatsApp Message": { "main": [ [ { "node": "10. HTTP \u2014 Send WhatsApp via Twilio", "type": "main", "index": 0 }, { "node": "11. Google Sheets \u2014 Save Digest", "type": "main", "index": 0 } ] ] }, "8. AI Agent \u2014 Generate Study Digest": { "main": [ [ { "node": "9. Code \u2014 Build WhatsApp Message", "type": "main", "index": 0 } ] ] }, "5. HTTP \u2014 WayinVideo Get Summary Results": { "main": [ [ { "node": "6. IF \u2014 Summary Ready?", "type": "main", "index": 0 } ] ] }, "3. HTTP \u2014 WayinVideo Submit Summarization": { "main": [ [ { "node": "4. Wait \u2014 90 Seconds", "type": "main", "index": 0 } ] ] } } }