{ "edges": [ { "to": "c0b3e254-c96e-41ff-ba17-009ef42095eb", "from": "4a3dfcce-07f8-4302-a6f8-9d77d989c004", "toPort": "0", "fromPort": "0" }, { "to": "01483244-ac10-409b-89b7-a4fe552c939e", "from": "c0b3e254-c96e-41ff-ba17-009ef42095eb", "toPort": "0", "fromPort": "0" }, { "to": "74a8b677-e908-489b-939e-24c0b3a3d55f", "from": "d95fcf37-9a52-4446-ad80-9c4a1a2f7111", "toPort": "0", "fromPort": "0" }, { "to": "d95fcf37-9a52-4446-ad80-9c4a1a2f7111", "from": "c996c87f-9fb4-4321-b268-b5d1de4bee92", "toPort": "0", "fromPort": "0" }, { "to": "bdf8ffc3-04ba-4043-a27c-77114808573c", "from": "416e76d5-1ff1-4d86-b937-dfcb69e3b9fa", "toPort": "0", "fromPort": "0" }, { "to": "c996c87f-9fb4-4321-b268-b5d1de4bee92", "from": "072fe3df-815f-4eda-ad16-1624c76ff355", "toPort": "0", "fromPort": "0" }, { "to": "072fe3df-815f-4eda-ad16-1624c76ff355", "from": "97a3afd6-32bf-412d-9e20-91f5fee5a553", "toPort": "0", "fromPort": "0" }, { "to": "416e76d5-1ff1-4d86-b937-dfcb69e3b9fa", "from": "01483244-ac10-409b-89b7-a4fe552c939e", "toPort": "0", "fromPort": "0" }, { "to": "4a3dfcce-07f8-4302-a6f8-9d77d989c004", "from": "74a8b677-e908-489b-939e-24c0b3a3d55f", "toPort": "0", "fromPort": "0" } ], "nodes": [ { "id": "97a3afd6-32bf-412d-9e20-91f5fee5a553", "name": "Webhook Trigger", "type": "trigger", "params": { "kind": "n8n-nodes-base.webhook", "path": "hackathon-badge", "options": {}, "httpMethod": "POST" }, "position": [ -448, 304 ] }, { "id": "072fe3df-815f-4eda-ad16-1624c76ff355", "name": "Validate Input", "type": "code", "params": { "functionCode": "// Extract only the actual payload from the webhook\nconst payload = $input.first().json.body;\n\n// Required fields\nconst required = [\"name\", \"email\", \"event\"];\nconst errors = [];\n\n// Check required fields\nrequired.forEach(field => {\n if (!payload[field] || String(payload[field]).trim() === \"\") {\n errors.push(`${field} is required`);\n }\n});\n\n// Very basic email format check\nif (!payload.email || !payload.email.includes(\"@\") || !payload.email.includes(\".\")) {\n errors.push(\"Invalid email format\");\n}\n\nif (errors.length > 0) {\n throw new Error(\"VALIDATION_ERROR: \" + errors.join(\" | \"));\n}\n\n// Pass only the clean data forward\nreturn [{ json: payload }];" }, "position": [ -272, 304 ] }, { "id": "d95fcf37-9a52-4446-ad80-9c4a1a2f7111", "name": "Email Valid?", "type": "if", "params": { "conditions": { "boolean": [ { "value1": "={{ $json.valid }}", "value2": true } ] } }, "position": [ 64, 304 ] }, { "id": "74a8b677-e908-489b-939e-24c0b3a3d55f", "name": "Generate Badge ID & URL", "type": "code", "params": { "functionCode": "const now = new Date();\nconst badgeId = `HACK-${now.getFullYear()}-${Math.floor(Date.now()/1000)}-${Math.random().toString(36).substr(2,6).toUpperCase()}`;\nconst verifyUrl = `https://yourdomain.com/verify-badge?id=${badgeId}`;\nconst issuedAt = now.toLocaleDateString('en-US', {\n month: 'long',\n day: 'numeric',\n year: 'numeric'\n});\n\n// Direct QR code URL (no external node needed!)\nconst qrCodeUrl = `https://api.qrserver.com/v1/create-qr-code/?size=300x300&format=png&data=${encodeURIComponent(verifyUrl)}`;\n\nreturn [{\n json: {\n ...$json,\n badgeId,\n verifyUrl,\n issuedAt,\n qrCodeUrl\n }\n}];" }, "position": [ 432, 288 ] }, { "id": "c0b3e254-c96e-41ff-ba17-009ef42095eb", "name": "Download PDF", "type": "http", "params": { "url": "={{ $json.pdf_url }}", "options": {} }, "position": [ 928, 288 ] }, { "id": "01483244-ac10-409b-89b7-a4fe552c939e", "name": "Send Badge via Gmail", "type": "integration", "params": { "sendTo": "={{ $('Validate Input').item.json.email }}", "message": "=

\n Hi {{ $('Validate Input').item.json.name.split(\" \")[0] }},\n

\n\n

\n Congratulations! Here is your official participant badge for:\n

\n\n

\n {{ $('Validate Input').item.json.event}}\n

\n\n\n \n \n \n \n \n \n \n \n

\n Badge ID:\n	\n {{ $('Generate Badge ID & URL').item.json.badgeId }}\n
\n Verify Online:\n	\n Click here to verify\n

\n\n

\n Print the attached PDF or show it on your phone at check-in.
\n The QR code links directly to your verification page.\n

\n\n

\n See you at the hackathon!
\n The {{ $('Validate Input').item.json.event }} Team\n

", "options": { "attachmentsUi": { "attachmentsBinary": [ {} ] } }, "service": "gmail", "subject": "=Your Official {{ $('Validate Input').item.json.event }} Badge", "operation": "read" }, "position": [ 1120, 288 ] }, { "id": "bdf8ffc3-04ba-4043-a27c-77114808573c", "name": "Success Response", "type": "passthrough", "params": { "mode": "noOp", "options": {} }, "position": [ 1456, 288 ] }, { "id": "c996c87f-9fb4-4321-b268-b5d1de4bee92", "name": "Verifi Email", "type": "integration", "params": { "email": "={{ $json.email }}", "service": "verifiemail", "operation": "run", "__originalType": "n8n-nodes-verifiemail.verifiEmail" }, "position": [ -96, 304 ] }, { "id": "4a3dfcce-07f8-4302-a6f8-9d77d989c004", "name": "HTML to PDF", "type": "integration", "params": { "service": "htmlcsstopdf", "operation": "run", "html_content": "=\n\n\n \n {{ $('Webhook Trigger').item.json.body.event }} - Badge\n \n\n\n

\n $\"Event$ \n \n

\n Team: {{ $('Webhook Trigger').item.json.body.team || 'Individual'}}
\n Role: {{ $('Webhook Trigger').item.json.body.role|| 'Participant'}}

\n Issued: {{ $json.issuedAt }}\n

Badge ID: {{ $json.badgeId }}

\n $\"QR$ \n

\n \n

\n\n", "__originalType": "n8n-nodes-htmlcsstopdf.htmlcsstopdf" }, "position": [ 656, 288 ] }, { "id": "416e76d5-1ff1-4d86-b937-dfcb69e3b9fa", "name": "Log to Sheets", "type": "integration", "params": { "columns": { "value": { "Name": "={{ $('Validate Input').item.json.name }}", "Role": "={{ $('Validate Input').item.json.role }}", "Team": "={{ $('Validate Input').item.json.team }}", "Email": "={{ $('Validate Input').item.json.email }}", "Event": "={{ $('Validate Input').item.json.event }}", "Status": "Sent", "PDF URL": "={{ $('HTML to PDF').item.json.pdf_url }}", "Badge ID": "={{ $('Generate Badge ID & URL').item.json.badgeId }}", "Timestamp": "={{ $now }}", "Verify URL": "={{ $('Generate Badge ID & URL').item.json.verifyUrl }}", "Issued Date": "={{ $('Generate Badge ID & URL').item.json.issuedAt }}" }, "schema": [ { "id": "Timestamp", "type": "string", "display": true, "required": false, "displayName": "Timestamp", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Name", "type": "string", "display": true, "required": false, "displayName": "Name", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Email", "type": "string", "display": true, "required": false, "displayName": "Email", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Team", "type": "string", "display": true, "required": false, "displayName": "Team", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Role", "type": "string", "display": true, "required": false, "displayName": "Role", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Event", "type": "string", "display": true, "required": false, "displayName": "Event", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Badge ID", "type": "string", "display": true, "required": false, "displayName": "Badge ID", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Verify URL", "type": "string", "display": true, "required": false, "displayName": "Verify URL", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Issued Date", "type": "string", "display": true, "required": false, "displayName": "Issued Date", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "PDF URL", "type": "string", "display": true, "required": false, "displayName": "PDF URL", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "Status", "type": "string", "display": true, "removed": false, "required": false, "displayName": "Status", "defaultMatch": false, "canBeUsedToMatch": true } ], "mappingMode": "defineBelow", "matchingColumns": [], "attemptToConvertTypes": false, "convertFieldsToString": false }, "options": {}, "service": "googleSheets", "operation": "append", "sheetName": { "__rl": true, "mode": "list", "value": "gid=0", "cachedResultUrl": "https://docs.google.com/spreadsheets/d/YOUR_DOCUMENT_ID/edit#gid=0", "cachedResultName": "YOUR_SHEET_NAME" }, "documentId": { "__rl": true, "mode": "list", "value": "YOUR_DOCUMENT_ID", "cachedResultUrl": "https://docs.google.com/spreadsheets/d/YOUR_DOCUMENT_ID/edit?usp=drivesdk", "cachedResultName": "YOUR_DOCUMENT_NAME" } }, "position": [ 1296, 288 ] } ] }

Hackathon participant badge generator with QR code, PDF & email delivery