자격 증명 생성기

• •Google 계정 및 Gmail API 인증 정보
• •Slack Bot Token 또는 Webhook URL
• •HTTP Webhook 엔드포인트(n8n이 자동으로 생성)
• •Google Sheets API 인증 정보

{
  "id": "",
  "meta": {
    "instanceId": ""
  },
  "name": "certificate generator",
  "tags": [
    {
      "id": "CWzMtsCN0QfPR9PC",
      "name": "certificates",
      "createdAt": "2025-10-04T15:28:20.021Z",
      "updatedAt": "2025-10-04T15:28:20.021Z"
    },
    {
      "id": "qFR253LK8bI8GX4z",
      "name": "automation",
      "createdAt": "2025-10-04T15:28:20.027Z",
      "updatedAt": "2025-10-04T15:28:20.027Z"
    }
  ],
  "nodes": [
    {
      "id": "8aef6c7c-9dfd-483b-9b66-ee9a21ad0e3b",
      "name": "자격 증명 설정 가이드",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -3024,
        -96
      ],
      "parameters": {
        "color": 7,
        "width": 452,
        "height": 856,
        "content": "## 🔧 CREDENTIALS SETUP REQUIRED\n\nBefore activating this workflow, configure these credentials:\n\n1. VerifiEmail API\n   - Sign up at https://verifi.email\n   - Get your API key from dashboard\n   - In n8n: Add VerifiEmail credential\n   - Paste API key\n\n2. HTMLcsstoImage API\n   - Sign up at https://htmlcsstoimg.com\n   - Get User ID and API Key\n   - In n8n: Add HTMLcsstoImg credential\n   - Enter User ID and API Key\n\n3. Gmail OAuth2 (for sending emails)\n   - Go to Settings > Credentials\n   - Add Gmail OAuth2\n   - Follow Google OAuth setup\n   - Grant necessary permissions\n   - Test connection\n\n4. Google Sheets OAuth2 (for logging)\n   - Add Google Sheets OAuth2 credential\n   - Create spreadsheet: \"Certificates Log\"\n   - Add these column headers:\n     • Certificate ID\n     • Recipient Name\n     • Course\n     • Email\n     • Completion Date\n     • Generated At\n     • Certificate URL\n     • Status\n     • Instructor\n     • Duration\n\n✅ All credentials configured in this workflow"
      },
      "typeVersion": 1
    },
    {
      "id": "713712a6-27e5-482b-8994-eae001ab2785",
      "name": "Webhook 정보",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -2512,
        64
      ],
      "parameters": {
        "color": 7,
        "width": 444,
        "height": 628,
        "content": "## 📥 WEBHOOK TRIGGER\n\nAccepts POST requests with certificate data\n\nRequired JSON format:\n```\n{\n  \"name\": \"John Doe\",\n  \"course\": \"Course Name\",\n  \"date\": \"2025-10-04\",\n  \"email\": \"user@example.com\"\n}\n```\nOptional fields:\n```\n{\n  \"instructor\": \"Jane Smith\",\n  \"duration\": \"40 hours\",\n  \"certificateId\": \"CERT-2025-001\"\n}\n```\n🔗 Your Webhook URL:\n```https://n8n.exildraw.com/webhook-test/certificate-generator```\n\n📝 All data is accessed via:\n{{ $json.body.fieldName }}"
      },
      "typeVersion": 1
    },
    {
      "id": "a8b8e036-c01d-4091-b817-43611a1e2643",
      "name": "증명서 요청 Webhook",
      "type": "n8n-nodes-base.webhook",
      "position": [
        -2192,
        544
      ],
      "webhookId": "certificate-generator",
      "parameters": {
        "path": "certificate-generator",
        "options": {},
        "httpMethod": "POST",
        "responseMode": "lastNode"
      },
      "typeVersion": 2
    },
    {
      "id": "3129040e-f390-4661-b17a-32b5c029cd8b",
      "name": "이메일 검증 정보",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -2016,
        144
      ],
      "parameters": {
        "color": 7,
        "width": 380,
        "height": 548,
        "content": "## 📧 EMAIL VALIDATION STEP\n\nUses VerifiEmail API to validate recipient email\n\nChecks performed:\n✓ RFC Compliance (proper email format)\n✓ Valid MX Records (domain accepts email)\n✓ Spoof Detection (checks for fake domains)\n✓ Disposable Email Detection (blocks temp emails)\n\nOutput includes:\n• valid: true/false\n• provider: email service provider\n• MX records: mail server details\n\n⚠️ Credential Required: VerifiEmail API key\n\nNext Step: IF node validates this + other fields"
      },
      "typeVersion": 1
    },
    {
      "id": "5c1071ea-cc45-49b2-9498-083d3a09508b",
      "name": "검증 로직",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1584,
        80
      ],
      "parameters": {
        "color": 7,
        "width": 360,
        "height": 596,
        "content": "## ✅ VALIDATION CHECKPOINT\n\nChecks ALL required conditions:\n\nFrom Webhook:\n1. Name is not empty\n2. Course is not empty\n3. Date is not empty\n\nFrom VerifiEmail:\n4. Email validation = true\n\nAll conditions must pass (AND logic)\n\n✓ TRUE → Continue to Combine Data\n✗ FALSE → Stop workflow with error\n\nAccessing data:\n• Webhook: $('Certificate Request Webhook').item.json.body.field\n• Email: $json.valid"
      },
      "typeVersion": 1
    },
    {
      "id": "745c8af8-c38e-4257-968d-c8abeb30e5d3",
      "name": "데이터 결합 정보",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1184,
        -32
      ],
      "parameters": {
        "color": 7,
        "width": 380,
        "height": 716,
        "content": "## 🔄 COMBINE WEBHOOK + EMAIL DATA\n\nMerges certificate data with email validation results\n\nInput sources:\n• Webhook data: name, course, date, email, instructor, duration\n• Email validation: valid, provider, MX records\n\nOutput structure:\n```\n{\n  name, course, date, email,\n  instructor, duration, certificateId,\n  emailValidation: {\n    valid, provider, rfcCompliant,\n    validMxRecord, disposable\n  }\n}\n```\nPurpose: Creates clean data structure for HTML generation\n\n⚡ Auto-generates certificateId if not provided\n📅 Keeps original date format for later formatting"
      },
      "typeVersion": 1
    },
    {
      "id": "99566da7-4b33-4df0-a280-5a5db861bf13",
      "name": "HTML 생성 정보",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -768,
        -48
      ],
      "parameters": {
        "color": 7,
        "width": 380,
        "height": 724,
        "content": "## 🎨 HTML CERTIFICATE GENERATOR\n\nCreates beautiful HTML certificate with:\n\nDesign Features:\n• Purple gradient background (#667eea → #764ba2)\n• Professional typography (Playfair Display + Montserrat)\n• Gold achievement badge with star\n• Clean white certificate with borders\n• Signature section with instructor name\n• Formatted completion date\n\nDynamic Content:\n• Recipient name (large, centered)\n• Course name\n• Completion date (formatted as \"Month Day, Year\")\n• Certificate ID (bottom right)\n• Instructor name (or \"Program Director\" if not provided)\n• Duration (optional, shown if provided)\n\nAuto-generates:\n• Unique Certificate ID if not provided\n• Format: CERT-{timestamp}-{random}\n\nOutput: Complete HTML ready for image conversion"
      },
      "typeVersion": 1
    },
    {
      "id": "d2f582b7-9d23-43b9-bc05-e50f96ad122f",
      "name": "HTML 증명서 생성",
      "type": "n8n-nodes-base.code",
      "position": [
        -640,
        528
      ],
      "parameters": {
        "jsCode": "// Certificate HTML Generator\nconst items = $input.all();\n\nreturn items.map(item => {\n  const data = item.json;\n  \n  // Generate unique certificate ID if not provided\n  const certId = data.certificateId || `CERT-${Date.now()}-${Math.random().toString(36).substr(2, 9).toUpperCase()}`;\n  \n  // Format date nicely\n  const certDate = new Date(data.date).toLocaleDateString('en-US', {\n    year: 'numeric',\n    month: 'long',\n    day: 'numeric'\n  });\n  \n  // HTML Template with inline CSS\n  const htmlContent = `\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n    <meta charset=\"UTF-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>Certificate of Completion</title>\n    <style>\n        @import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;700&family=Montserrat:wght@300;400;600&display=swap');\n        \n        * {\n            margin: 0;\n            padding: 0;\n            box-sizing: border-box;\n        }\n        \n        body {\n            width: 1200px;\n            height: 850px;\n            font-family: 'Montserrat', sans-serif;\n            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);\n            display: flex;\n            justify-content: center;\n            align-items: center;\n            padding: 40px;\n        }\n        \n        .certificate {\n            background: white;\n            width: 100%;\n            height: 100%;\n            border: 20px solid #f8f9fa;\n            box-shadow: 0 20px 60px rgba(0,0,0,0.3);\n            position: relative;\n            padding: 60px 80px;\n            display: flex;\n            flex-direction: column;\n            justify-content: space-between;\n        }\n        \n        .certificate::before {\n            content: '';\n            position: absolute;\n            top: 35px;\n            left: 35px;\n            right: 35px;\n            bottom: 35px;\n            border: 3px solid #667eea;\n            pointer-events: none;\n        }\n        \n        .header {\n            text-align: center;\n            margin-bottom: 20px;\n        }\n        \n        .logo {\n            width: 80px;\n            height: 80px;\n            margin: 0 auto 15px;\n            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);\n            border-radius: 50%;\n            display: flex;\n            align-items: center;\n            justify-content: center;\n            color: white;\n            font-size: 36px;\n            font-weight: bold;\n        }\n        \n        .title {\n            font-family: 'Playfair Display', serif;\n            font-size: 48px;\n            font-weight: 700;\n            color: #2d3748;\n            letter-spacing: 2px;\n            margin-bottom: 10px;\n        }\n        \n        .subtitle {\n            font-size: 18px;\n            color: #718096;\n            text-transform: uppercase;\n            letter-spacing: 3px;\n            font-weight: 300;\n        }\n        \n        .content {\n            text-align: center;\n            flex-grow: 1;\n            display: flex;\n            flex-direction: column;\n            justify-content: center;\n        }\n        \n        .presented-to {\n            font-size: 16px;\n            color: #718096;\n            text-transform: uppercase;\n            letter-spacing: 2px;\n            margin-bottom: 20px;\n        }\n        \n        .recipient-name {\n            font-family: 'Playfair Display', serif;\n            font-size: 56px;\n            font-weight: 700;\n            color: #667eea;\n            margin-bottom: 30px;\n            padding-bottom: 15px;\n            border-bottom: 3px solid #e2e8f0;\n            display: inline-block;\n            min-width: 500px;\n        }\n        \n        .description {\n            font-size: 18px;\n            color: #4a5568;\n            line-height: 1.8;\n            margin-bottom: 25px;\n            max-width: 700px;\n            margin-left: auto;\n            margin-right: auto;\n        }\n        \n        .course-name {\n            font-weight: 600;\n            color: #2d3748;\n            font-size: 24px;\n            margin: 20px 0;\n        }\n        \n        .footer {\n            display: flex;\n            justify-content: space-between;\n            align-items: flex-end;\n            margin-top: 40px;\n        }\n        \n        .signature-block {\n            text-align: center;\n            flex: 1;\n        }\n        \n        .signature-line {\n            border-top: 2px solid #2d3748;\n            width: 250px;\n            margin: 0 auto 10px;\n            padding-top: 5px;\n        }\n        \n        .signature-name {\n            font-weight: 600;\n            color: #2d3748;\n            font-size: 16px;\n            margin-bottom: 5px;\n        }\n        \n        .signature-title {\n            font-size: 14px;\n            color: #718096;\n        }\n        \n        .date-block {\n            text-align: center;\n        }\n        \n        .date-label {\n            font-size: 12px;\n            color: #718096;\n            text-transform: uppercase;\n            letter-spacing: 1px;\n            margin-bottom: 5px;\n        }\n        \n        .date-value {\n            font-weight: 600;\n            color: #2d3748;\n            font-size: 16px;\n        }\n        \n        .cert-id {\n            position: absolute;\n            bottom: 15px;\n            right: 25px;\n            font-size: 10px;\n            color: #a0aec0;\n            letter-spacing: 1px;\n        }\n        \n        .badge {\n            position: absolute;\n            top: 50px;\n            right: 60px;\n            width: 100px;\n            height: 100px;\n            background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);\n            border-radius: 50%;\n            display: flex;\n            align-items: center;\n            justify-content: center;\n            box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);\n        }\n        \n        .badge::before {\n            content: '★';\n            font-size: 50px;\n            color: white;\n        }\n    </style>\n</head>\n<body>\n    <div class=\"certificate\">\n        <div class=\"badge\"></div>\n        \n        <div class=\"header\">\n            <div class=\"logo\">C</div>\n            <h1 class=\"title\">Certificate of Completion</h1>\n            <p class=\"subtitle\">This certifies that</p>\n        </div>\n        \n        <div class=\"content\">\n            <div class=\"recipient-name\">${data.name}</div>\n            \n            <p class=\"description\">\n                has successfully completed the course\n            </p>\n            \n            <div class=\"course-name\">${data.course}</div>\n            \n            ${data.duration ? `<p class=\"description\" style=\"margin-top: 10px; font-size: 16px;\">Duration: ${data.duration}</p>` : ''}\n        </div>\n        \n        <div class=\"footer\">\n            <div class=\"signature-block\">\n                <div class=\"signature-line\"></div>\n                <div class=\"signature-name\">${data.instructor || 'Program Director'}</div>\n                <div class=\"signature-title\">Instructor</div>\n            </div>\n            \n            <div class=\"date-block\">\n                <div class=\"date-label\">Date of Completion</div>\n                <div class=\"date-value\">${certDate}</div>\n            </div>\n        </div>\n        \n        <div class=\"cert-id\">Certificate ID: ${certId}</div>\n    </div>\n</body>\n</html>\n  `;\n  \n  return {\n    json: {\n      ...data,\n      certificateId: certId,\n      html: htmlContent,\n      formattedDate: certDate\n    }\n  };\n});"
      },
      "typeVersion": 2
    },
    {
      "id": "9e764afe-be0f-4a6a-b5fc-4e2213353ae4",
      "name": "이미지 변환 정보",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -320,
        -16
      ],
      "parameters": {
        "color": 7,
        "width": 380,
        "height": 704,
        "content": "## IMAGE CONVERSION\n\nConverts HTML certificate to high-quality PNG image\n\nService: HTMLcsstoImg API\nAPI Endpoint: hcti.io\n\nConfiguration:\n• Input: {{ $json.html }}\n• Google Fonts: Playfair Display|Montserrat\n• Output: PNG image\n• Resolution: 1200x850px\n\nAPI Response:\n```\n{\n  \"image_url\": \"https://hcti.io/v1/image/[id]\",\n  \"image_id\": \"[unique-id]\"\n}\n```\n⚠️ Credential Required: HTMLcsstoImg API\n   User ID + API Key configured\n\n✅ Direct shareable URL returned\n📥 Image hosted on HTMLcsstoImg servers\n🔗 Permanent URL (doesn't expire)"
      },
      "typeVersion": 1
    },
    {
      "id": "edac6e11-432b-42f2-9128-b39d4585bd5b",
      "name": "이메일 전송 정보",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        128,
        -128
      ],
      "parameters": {
        "color": 7,
        "width": 380,
        "height": 808,
        "content": "## CERTIFICATE EMAIL DELIVERY\n\nSends professional congratulatory email via Gmail\n\nEmail Contents:\n• Subject: \"🎓 Congratulations! Your Certificate of Completion\"\n• HTML-formatted message with:\n  - Gradient header with recipient name\n  - Course details in styled box\n  - Download button with certificate URL\n  - Certificate details table\n  - Call-to-action to share on LinkedIn\n  - Professional footer\n\nData Sources:\n• Recipient: From \"Code in JavaScript\" node\n• Certificate details: From \"Generate HTML Certificate\" node\n• Certificate URL: From \"HTML/CSS to Image\" node\n\nVariables used:\n• {{ $('Generate HTML Certificate').item.json.name }}\n• {{ $('Generate HTML Certificate').item.json.course }}\n• {{ $('Generate HTML Certificate').item.json.certificateId }}\n• {{ $json.image_url }}\n\n⚠️ Credential: Gmail OAuth2"
      },
      "typeVersion": 1
    },
    {
      "id": "7acdd47b-7014-4e0f-8b44-5acf326412be",
      "name": "증명서 이메일 전송",
      "type": "n8n-nodes-base.gmail",
      "position": [
        288,
        528
      ],
      "webhookId": "",
      "parameters": {
        "sendTo": "={{ $('Code in JavaScript').item.json.email }}",
        "message": "=<!DOCTYPE html>\n<html>\n<head>\n    <style>\n        body { font-family: Arial, sans-serif; line-height: 1.6; color: #333; margin: 0; padding: 0; }\n        .container { max-width: 600px; margin: 0 auto; }\n        .header { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); \n                  color: white; padding: 40px 20px; text-align: center; }\n        .header h1 { margin: 0; font-size: 28px; }\n        .content { background: #f8f9fa; padding: 40px 30px; }\n        .content p { margin: 15px 0; }\n        .course-box { background: white; border-left: 4px solid #667eea; \n                      padding: 20px; margin: 25px 0; border-radius: 5px; }\n        .course-box h2 { color: #667eea; margin: 0 0 10px 0; font-size: 22px; }\n        .button { background: #667eea; color: white; padding: 15px 30px; \n                  text-decoration: none; border-radius: 5px; display: inline-block; \n                  margin: 20px 0; font-weight: bold; }\n        .button:hover { background: #5568d3; }\n        .details { background: white; padding: 20px; border-radius: 5px; margin: 20px 0; }\n        .details ul { list-style: none; padding: 0; }\n        .details li { padding: 8px 0; border-bottom: 1px solid #e2e8f0; }\n        .details li:last-child { border-bottom: none; }\n        .details strong { color: #667eea; }\n        .footer { text-align: center; padding: 30px 20px; color: #718096; font-size: 14px; }\n        .footer p { margin: 5px 0; }\n    </style>\n</head>\n<body>\n    <div class=\"container\">\n        <div class=\"header\">\n            <h1>🎉 Congratulations, {{ $('Generate HTML Certificate').item.json.name }} !</h1>\n            <p style=\"margin: 10px 0 0 0; font-size: 16px;\">You've successfully completed your course</p>\n        </div>\n        \n        <div class=\"content\">\n            <p>We're thrilled to celebrate your achievement! You have successfully completed:</p>\n            \n            <div class=\"course-box\">\n                <h2>{{ $('Generate HTML Certificate').item.json.course }}</h2>\n                <p style=\"margin: 0; color: #718096;\">Completion Date: {{ $('Generate HTML Certificate').item.json.formattedDate }}</p>\n            </div>\n            \n            <p>Your certificate is ready and available for download. Share your accomplishment with your professional network!</p>\n            \n            <div style=\"text-align: center;\">\n                <a href=\"{{ $json.image_url }}\" class=\"button\">📥 Download Certificate</a>\n            </div>\n            \n            <div class=\"details\">\n                <p><strong>📋 Certificate Details:</strong></p>\n                <ul>\n                    <li><strong>Certificate ID:</strong>{{ $('Generate HTML Certificate').item.json.certificateId }} </li>\n                    <li><strong>Recipient:</strong>{{ $('Generate HTML Certificate').item.json.name }} </li>\n                    <li><strong>Course:</strong> {{ $('Generate HTML Certificate').item.json.course }}</li>\n                    <li><strong>Completion Date:</strong> {{ $('Generate HTML Certificate').item.json.formattedDate }}</li>\n                    {{ $json.duration ? '<li><strong>Duration:</strong> ' + $json.duration + '</li>' : '' }}\n                    {{ $json.instructor ? '<li><strong>Instructor:</strong> ' + $json.instructor + '</li>' : '' }}\n                </ul>\n            </div>\n            \n            <p><strong>💼 Share Your Success:</strong></p>\n            <p>Don't forget to add this certificate to your LinkedIn profile and share it with your network to showcase your new skills!</p>\n            \n            <p style=\"margin-top: 30px; color: #718096; font-size: 14px;\">If you have any questions about your certificate, please don't hesitate to reach out to our support team.</p>\n        </div>\n        \n        <div class=\"footer\">\n            <p><strong>Thank you for learning with us!</strong></p>\n            <p>© 2025 Your Organization. All rights reserved.</p>\n            <p style=\"font-size: 12px; margin-top: 15px;\">Certificate verification available at: yoursite.com/verify</p>\n        </div>\n    </div>\n</body>\n</html>",
        "options": {},
        "subject": "🎓 Congratulations! Your Certificate of Completion"
      },
      "credentials": {
        "gmailOAuth2": {
          "id": "",
          "name": "Gmail OAuth2"
        }
      },
      "typeVersion": 2.1
    },
    {
      "id": "5820e8bb-2f26-4d04-8445-61ea99902d35",
      "name": "데이터베이스 로깅 정보",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        592,
        -176
      ],
      "parameters": {
        "color": 7,
        "width": 380,
        "height": 864,
        "content": "## GOOGLE SHEETS LOGGING\n\nRecords every certificate to spreadsheet for tracking\n\nSpreadsheet: \"Certificates Log\"\nSheet: Sheet1\n\nLogged Data (10 columns):\n1. Certificate ID - Unique identifier\n2. Recipient Name - Full name\n3. Course - Course/program name\n4. Email - Recipient email\n5. Completion Date - Original date from webhook\n6. Generated At - Current timestamp (ISO format)\n7. Certificate URL - Direct image link\n8. Status - Always \"Sent\"\n9. Instructor - Instructor name\n10. Duration - Course duration\n\nData Sources:\n• Most fields: From \"Generate HTML Certificate\" node\n• Certificate URL: From \"HTML/CSS to Image\" node\n• Generated At: {{ $now.toISO() }}\n\nOperation: Append or Update Row\nMatch Column: Certificate ID (prevents duplicates)\n\n⚠️ Credential: Google Sheets OAuth2 \n\nPurpose: Audit trail, analytics, certificate verification"
      },
      "typeVersion": 1
    },
    {
      "id": "37b407ee-9362-402a-b708-5c821e1e1116",
      "name": "Google 시트에 기록",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        752,
        528
      ],
      "parameters": {
        "columns": {
          "value": {
            "Email": "={{ $('Generate HTML Certificate').item.json.email }}",
            "Course": "={{ $('Generate HTML Certificate').item.json.course }}",
            "Status": "Sent",
            "Duration": "={{ $('Generate HTML Certificate').item.json.duration }}",
            "Instructor": "={{ $('Generate HTML Certificate').item.json.instructor }}",
            "Generated At": "={{ $now.toISO() }}",
            "Certificate ID": "={{ $('Generate HTML Certificate').item.json.certificateId }}",
            "Recipient Name": "={{ $('Generate HTML Certificate').item.json.name }}",
            "Certificate URL": "={{ $('HTML/CSS to Image').item.json.image_url }}",
            "Completion Date ": "={{ $('Generate HTML Certificate').item.json.date }}"
          },
          "schema": [
            {
              "id": "Certificate ID",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Certificate ID",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "Recipient Name",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Recipient Name",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "Course",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Course",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "Email",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Email",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "Completion Date ",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Completion Date ",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "Generated At",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Generated At",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "Certificate URL",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Certificate URL",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "Status",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Status",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "Instructor",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Instructor",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            },
            {
              "id": "Duration",
              "type": "string",
              "display": true,
              "removed": false,
              "required": false,
              "displayName": "Duration",
              "defaultMatch": false,
              "canBeUsedToMatch": true
            }
          ],
          "mappingMode": "defineBelow",
          "matchingColumns": [
            "Certificate ID"
          ],
          "attemptToConvertTypes": false,
          "convertFieldsToString": false
        },
        "options": {},
        "operation": "appendOrUpdate",
        "sheetName": {
          "__rl": true,
          "mode": "list",
          "value": "",
          "cachedResultUrl": "",
          "cachedResultName": "Sheet1"
        },
        "documentId": {
          "__rl": true,
          "mode": "list",
          "value": "",
          "cachedResultUrl": "",
          "cachedResultName": "Certificates Log"
        }
      },
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "",
          "name": "Google Sheets OAuth2"
        }
      },
      "typeVersion": 4.4
    },
    {
      "id": "559bc397-1e64-4f9e-91e0-69f01a2de564",
      "name": "성공 응답 정보",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1024,
        352
      ],
      "parameters": {
        "color": 7,
        "width": 716,
        "height": 624,
        "content": "## ⚠️ RECOMMENDED ADDITION\n\nMISSING: Success Response to Webhook\n\nCurrently, workflow completes but doesn't send response back to webhook caller.\n\nTo add:\n1. Add \"Respond to Webhook\" node\n   After \"Log to Google Sheets\"\n\n2. Configure response:\n   Response Code: 200\n   Response Body:\n   ```\n    {\n     \"success\": true,\n     \"message\": \"Certificate generated successfully!\",\n     \"certificateId\": \"{{ $('Generate HTML Certificate').item.json.certificateId }}\",\n     \"recipientEmail\": \"{{ $('Generate HTML Certificate').item.json.email }}\",\n     \"certificateUrl\": \"{{ $('HTML/CSS to Image').item.json.image_url }}\",\n     \"generatedAt\": \"{{ $now.toISO() }}\"\n   }\n    ```\nWhy it's important:\n• API integrations need confirmation\n• Useful for tracking in external systems\n• Provides certificate URL to caller\n• Better for automation workflows\n\nWithout it: Workflow succeeds but caller gets no response"
      },
      "typeVersion": 1
    },
    {
      "id": "bd541a23-e982-4b64-82e2-30aea3e7601d",
      "name": "오류 처리 정보",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -2032,
        1088
      ],
      "parameters": {
        "color": 7,
        "width": 472,
        "height": 564,
        "content": "## ⚠️ ERROR HANDLING\n\nWorkflow includes error catching and notification\n\nError Trigger:\n• Catches any workflow errors\n• Activates separate error flow\n\nError Processing:\n1. Format Error Details (Code node)\n   - Extracts error message\n   - Identifies failed node\n   - Captures user data (name, email, course)\n   - Logs execution ID and timestamp\n\n2. Send Slack Alert (DISABLED)\n   - Would notify admin team\n   - Enable if you have Slack integration\n   - Shows error details and user info\n\nNote: Slack alert currently disabled\nTo enable: Configure Slack credential and enable node\n\nMissing: Error response to webhook caller\nRecommendation: Add \"Respond to Webhook\" node after error trigger to return 500 status code"
      },
      "typeVersion": 1
    },
    {
      "id": "429a6ac5-d269-4176-ac81-d65117df54dd",
      "name": "워크플로우 오류 시",
      "type": "n8n-nodes-base.errorTrigger",
      "position": [
        -1680,
        1216
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "e3cc736c-3a91-42d5-9037-5ffcad3e8cab",
      "name": "오류 세부 정보 형식화",
      "type": "n8n-nodes-base.code",
      "position": [
        -1472,
        1216
      ],
      "parameters": {
        "jsCode": "// Extract error information\nconst errorData = $input.first().json;\n\nreturn [{\n  json: {\n    errorMessage: errorData.error?.message || 'Unknown error occurred',\n    errorNode: errorData.node?.name || 'Unknown node',\n    timestamp: new Date().toISOString(),\n    workflowId: $workflow.id,\n    workflowName: $workflow.name,\n    executionId: $execution.id,\n    userData: {\n      name: errorData.json?.name || 'N/A',\n      email: errorData.json?.email || 'N/A',\n      course: errorData.json?.course || 'N/A'\n    },\n    fullError: JSON.stringify(errorData, null, 2)\n  }\n}];"
      },
      "typeVersion": 2
    },
    {
      "id": "c1ec5078-2bc7-4f7d-b413-fa0ca7691a15",
      "name": "Slack 경고 전송",
      "type": "n8n-nodes-base.slack",
      "notes": "Optional: Enable if you want Slack notifications",
      "disabled": true,
      "position": [
        -1280,
        1216
      ],
      "webhookId": "",
      "parameters": {
        "text": "=🚨 **Certificate Generation Failed**\n\n**Error:** {{ $json.errorMessage }}\n**Node:** {{ $json.errorNode }}\n**Time:** {{ $json.timestamp }}\n\n**User Details:**\n• Name: {{ $json.userData.name }}\n• Email: {{ $json.userData.email }}\n• Course: {{ $json.userData.course }}\n\n**Execution ID:** {{ $json.executionId }}\n**Workflow:** {{ $json.workflowName }}",
        "select": "channel",
        "channelId": {
          "__rl": true,
          "mode": "list",
          "value": "C12345",
          "cachedResultName": "alerts"
        },
        "otherOptions": {}
      },
      "typeVersion": 2.2
    },
    {
      "id": "7d756f81-a0ac-4b11-bf07-dded65a5070d",
      "name": "워크플로우 개요",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -3376,
        800
      ],
      "parameters": {
        "color": 7,
        "width": 444,
        "height": 760,
        "content": "## COMPLETE WORKFLOW STRUCTURE\n\nMain Certificate Generation Flow:\n\n1. 📥 Webhook Trigger\n   Receives JSON with certificate data\n\n2. 📧 Verifi Email\n   Validates email address with VerifiEmail API\n\n3. ✅ IF Validation\n   Checks: email valid + name/course/date not empty\n\n4. 🔄 Combine Data (Code node)\n   Merges webhook data + email validation\n\n5. 🎨 Generate HTML Certificate (Code node)\n   Creates beautiful HTML certificate\n\n6. 🖼️ HTML/CSS to Image\n   Converts HTML → PNG image\n\n7. 📧 Send Email (Gmail)\n   Delivers certificate to recipient\n\n8. 📊 Log to Google Sheets\n   Records certificate details\n\nError Flow (Separate):\n• On Workflow Error → Format Error → Slack Alert\n\nStatus: ✅ Fully functional workflow\nMissing: Success response to webhook (recommended)\n\nAll credentials configured and tested"
      },
      "typeVersion": 1
    },
    {
      "id": "7c4dc0c1-ae2b-4985-91de-a40356e28158",
      "name": "테스트 지침",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -2896,
        832
      ],
      "parameters": {
        "color": 7,
        "width": 568,
        "height": 856,
        "content": "## 🧪 TESTING YOUR WORKFLOW\n\nWebhook URL:\nhttps://n8n.exildraw.com/webhook-test/certificate-generator\n\nTest with cURL:\n```\ncurl -X POST https://n8n.exildraw.com/webhook-test/certificate-generator \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\n    \"name\": \"Test User\",\n    \"course\": \"Advanced JavaScript Programming\",\n    \"date\": \"2025-10-04\",\n    \"email\": \"test@gmail.com\",\n    \"instructor\": \"Jane Smith\",\n    \"duration\": \"40 hours\"\n  }'\n```\nTest with Postman:\n1. Method: POST\n2. URL: [webhook URL above]\n3. Headers: Content-Type = application/json\n4. Body: Use JSON from curl example\n\nExpected Results:\n✅ Email validation passes\n✅ HTML certificate generated\n✅ Image created at HTMLcsstoImg\n✅ Email sent to recipient\n✅ Entry logged in Google Sheets\n✅ All nodes execute successfully\n\nValidation Test (should fail):\n• Missing required field\n• Invalid email format\n• Disposable email address\n\n⚠️ Note: Use real email addresses for testing\nexample.com won't pass MX record validation\n\nCurrent Status: All nodes configured and ready\nNext: Add \"Respond to Webhook\" for success response"
      },
      "typeVersion": 1
    },
    {
      "id": "b9b4ba6f-35ca-4733-9d0a-0e2a7da5b56e",
      "name": "HTML/CSS to Image",
      "type": "n8n-nodes-htmlcsstoimage.htmlCssToImage",
      "position": [
        -160,
        528
      ],
      "parameters": {
        "html_content": "={{ $json.html }}"
      },
      "credentials": {
        "htmlcsstoimgApi": {
          "id": "",
          "name": "Htmlcsstoimg API"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "de9c267d-d005-43d4-bbb3-c33370f9493a",
      "name": "Verifi Email",
      "type": "n8n-nodes-verifiemail.verifiEmail",
      "position": [
        -1872,
        544
      ],
      "parameters": {
        "email": "={{ $json.body.email }}"
      },
      "credentials": {
        "verifiEmailApi": {
          "id": "",
          "name": "VerifiEmail API"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "646e0a7b-2cdc-48c0-8f15-5b7755e9e484",
      "name": "If",
      "type": "n8n-nodes-base.if",
      "position": [
        -1392,
        544
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 2,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "a39497f8-8b8a-4b3a-bc5f-3e8738fa4cbb",
              "operator": {
                "type": "string",
                "operation": "notEmpty",
                "singleValue": true
              },
              "leftValue": "={{ $('Certificate Request Webhook').item.json.body.name }}",
              "rightValue": ""
            },
            {
              "id": "37e0295c-18b2-4d3f-998b-e9d669dd90f7",
              "operator": {
                "type": "string",
                "operation": "notEmpty",
                "singleValue": true
              },
              "leftValue": "={{ $('Certificate Request Webhook').item.json.body.course }}",
              "rightValue": ""
            },
            {
              "id": "6ecb1197-b460-402e-99a1-00edb0d5150c",
              "operator": {
                "type": "string",
                "operation": "notEmpty",
                "singleValue": true
              },
              "leftValue": "={{ $('Certificate Request Webhook').item.json.body.date }}",
              "rightValue": ""
            },
            {
              "id": "3828fe0a-7c6a-449a-b380-c754717e0731",
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              },
              "leftValue": "={{ $json.valid }}",
              "rightValue": ""
            }
          ]
        }
      },
      "typeVersion": 2.2
    },
    {
      "id": "9b7e5242-b3da-4552-b088-d585ffe7bcb0",
      "name": "Stop and Error",
      "type": "n8n-nodes-base.stopAndError",
      "position": [
        -1040,
        784
      ],
      "parameters": {
        "errorMessage": "=\"Missing required fields: name, course, date, or valid email\""
      },
      "typeVersion": 1
    },
    {
      "id": "b57d3884-9846-4b1f-9b00-ec378ea386ac",
      "name": "Code in JavaScript",
      "type": "n8n-nodes-base.code",
      "position": [
        -1056,
        528
      ],
      "parameters": {
        "jsCode": "// Combine Webhook Data with Email Validation\n// Get the current item (from IF node - email validation data)\nconst emailData = $input.item.json;\n\n// Get the original webhook data from the first node\nconst webhookData = $('Certificate Request Webhook').first().json.body;\n\n// Combine everything\nreturn {\n  json: {\n    // Certificate data from webhook\n    name: webhookData.name,\n    course: webhookData.course,\n    date: webhookData.date,\n    email: webhookData.email,\n    instructor: webhookData.instructor || 'Program Director',\n    duration: webhookData.duration || '',\n    certificateId: webhookData.certificateId || '',\n    \n    // Email validation results (optional - for logging/debugging)\n    emailValidation: {\n      valid: emailData.valid,\n      provider: emailData.details.mx.provider,\n      rfcCompliant: emailData.details.rfcCompliant,\n      validMxRecord: emailData.details.validMxRecord,\n      disposable: emailData.details.disposable\n    }\n  }\n};"
      },
      "typeVersion": 2
    }
  ],
  "active": false,
  "pinData": {},
  "settings": {
    "executionOrder": "v1"
  },
  "versionId": "",
  "connections": {
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