{
  "nodes": [
    {
      "name": "Sign Up",
      "type": "n8n-nodes-base.webhook",
      "notes": "Example Input Data: {\"name\":\"John Doe\",\"email\":\"doe.j@northeastern.edu\"}",
      "position": [
        720,
        130
      ],
      "parameters": {
        "path": "sign-up",
        "httpMethod": "POST",
        "authentication": "basicAuth",
        "options": {}
      },
      "notesInFlow": true,
      "typeVersion": 1,
      "id": "enroll-webhook-signups-in-current-notion-semester-0"
    },
    {
      "name": "Prepare signup",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "const b=$input.first().json.body;if(typeof b?.name!=='string'||!b.name.trim()||typeof b?.email!=='string'||!b.email.trim())throw Error('Provide name and email');const userSourceId='YOUR_USER_DATA_SOURCE_ID',semesterSourceId='YOUR_SEMESTER_DATA_SOURCE_ID';if([userSourceId,semesterSourceId].some(x=>x.startsWith('YOUR_')))throw Error('Configure both data source IDs');return [{json:{name:b.name.trim(),email:b.email.trim(),userSourceId,semesterSourceId}}];"
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-1"
    },
    {
      "name": "Find current semester",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "parameters": {
        "method": "POST",
        "url": "={{ 'https://api.notion.com/v1/data_sources/'+$('Prepare signup').first().json.semesterSourceId+'/query' }}",
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "notionApi",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Notion-Version",
              "value": "2026-03-11"
            }
          ]
        },
        "sendBody": true,
        "contentType": "json",
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({filter:{property:'Is Current?',checkbox:{equals:true}},page_size:2}) }}",
        "options": {}
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-2"
    },
    {
      "name": "Check current semester",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "function semester({output}){if(!output||!Array.isArray(output.results)||output.results.length!==1||output.has_more!==false||typeof output.results[0]?.id!=='string'||!output.results[0].id)throw Error('Exactly one current semester is required');return{semesterId:output.results[0].id}}\n\nreturn [{json:semester({output:$input.first().json})}];"
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-3"
    },
    {
      "name": "Find user by email",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "parameters": {
        "method": "POST",
        "url": "={{ 'https://api.notion.com/v1/data_sources/'+$('Prepare signup').first().json.userSourceId+'/query' }}",
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "notionApi",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Notion-Version",
              "value": "2026-03-11"
            }
          ]
        },
        "sendBody": true,
        "contentType": "json",
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({filter:{property:'Email',email:{equals:$('Prepare signup').first().json.email}},page_size:2}) }}",
        "options": {}
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-4"
    },
    {
      "name": "Check user match",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "function user({output,name,email,userSourceId}){if(!output||!Array.isArray(output.results)||output.has_more!==false||output.results.length>1)throw Error('Ambiguous user email');const page=output.results[0];if(page&&(!page.id||!page.properties?.Semesters?.id))throw Error('User relation property is missing');return{exists:!!page,userId:page?.id??'',propertyId:page?.properties?.Semesters?.id??'',parent:{data_source_id:userSourceId},properties:{Name:{title:[{text:{content:name}}]},Email:{email}}}}\n\nconst p=$('Prepare signup').first().json;return [{json:user({output:$input.first().json,name:p.name,email:p.email,userSourceId:p.userSourceId})}];"
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-5"
    },
    {
      "name": "Existing user?",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "id": "exists",
              "leftValue": "={{ $json.exists }}",
              "rightValue": true,
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-6"
    },
    {
      "name": "Use existing user",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "return [{json:{userId:$json.userId,propertyId:$json.propertyId}}];"
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-7"
    },
    {
      "name": "Create user",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "parameters": {
        "method": "POST",
        "url": "https://api.notion.com/v1/pages",
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "notionApi",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Notion-Version",
              "value": "2026-03-11"
            }
          ]
        },
        "sendBody": true,
        "contentType": "json",
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({parent:$json.parent,properties:$json.properties}) }}",
        "options": {}
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-8"
    },
    {
      "name": "Confirm created user",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "function created({output}){if(typeof output?.id!=='string'||!output.id||typeof output.properties?.Semesters?.id!=='string'||!output.properties.Semesters.id)throw Error('Created user not confirmed; inspect Notion before retry');return{userId:output.id,propertyId:output.properties.Semesters.id}}\n\nreturn [{json:created({output:$input.first().json})}];"
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-9"
    },
    {
      "name": "Resolve user",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "if(typeof $json.userId!=='string'||!$json.userId||typeof $json.propertyId!=='string'||!$json.propertyId)throw Error('Missing user relation');return [{json:{userId:$json.userId,propertyId:$json.propertyId}}];"
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-10"
    },
    {
      "name": "Read semester relations",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "parameters": {
        "method": "GET",
        "url": "={{ 'https://api.notion.com/v1/pages/'+$('Resolve user').first().json.userId+'/properties/'+encodeURIComponent($('Resolve user').first().json.propertyId)+'?page_size=100' }}",
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "notionApi",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Notion-Version",
              "value": "2026-03-11"
            }
          ]
        },
        "options": {
          "response": {
            "response": {
              "responseFormat": "json",
              "fullResponse": true
            }
          },
          "pagination": {
            "pagination": {
              "paginationMode": "responseContainsNextURL",
              "nextURL": "={{ 'https://api.notion.com/v1/pages/'+$('Resolve user').first().json.userId+'/properties/'+encodeURIComponent($('Resolve user').first().json.propertyId)+'?page_size=100'+($pageCount===0?'':'&start_cursor='+encodeURIComponent($response.body.next_cursor)) }}",
              "paginationCompleteWhen": "other",
              "completeExpression": "={{ (()=>{const b=$response.body;if(b?.object!=='list'||!Array.isArray(b.results)||typeof b.has_more!=='boolean'||(b.has_more&&(typeof b.next_cursor!=='string'||!b.next_cursor)))throw Error('Invalid relation page');return !b.has_more})() }}",
              "limitPagesFetched": false
            }
          }
        }
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-11"
    },
    {
      "name": "Collect existing semesters",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "const all=[];for(const {json} of $input.all()){const b=json.body;if(b?.object!=='list'||!Array.isArray(b.results))throw Error('Invalid relation page');for(const x of b.results){if(typeof x?.relation?.id!=='string'||!x.relation.id)throw Error('Invalid relation');all.push(x.relation.id)}}const id=$('Check current semester').first().json.semesterId,unique=[id,...all.filter(x=>x!==id)];if(unique.length>100)throw Error('Notion cannot set more than 100 relations in one request');return [{json:{properties:{Semesters:{relation:unique.map(id=>({id}))}}}}];"
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-12"
    },
    {
      "name": "Add current semester",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "parameters": {
        "method": "PATCH",
        "url": "={{ 'https://api.notion.com/v1/pages/'+$('Resolve user').first().json.userId }}",
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "notionApi",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Notion-Version",
              "value": "2026-03-11"
            }
          ]
        },
        "sendBody": true,
        "contentType": "json",
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({properties:$json.properties}) }}",
        "options": {}
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-13"
    },
    {
      "name": "Confirm enrollment",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "if($json.id!==$('Resolve user').first().json.userId)throw Error('Notion update not confirmed');return [{json:{accepted:true}}];"
      },
      "id": "enroll-webhook-signups-in-current-notion-semester-14"
    }
  ],
  "connections": {
    "Sign Up": {
      "main": [
        [
          {
            "node": "Prepare signup",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Prepare signup": {
      "main": [
        [
          {
            "node": "Find current semester",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Find current semester": {
      "main": [
        [
          {
            "node": "Check current semester",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check current semester": {
      "main": [
        [
          {
            "node": "Find user by email",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Find user by email": {
      "main": [
        [
          {
            "node": "Check user match",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check user match": {
      "main": [
        [
          {
            "node": "Existing user?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Use existing user": {
      "main": [
        [
          {
            "node": "Resolve user",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Create user": {
      "main": [
        [
          {
            "node": "Confirm created user",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Confirm created user": {
      "main": [
        [
          {
            "node": "Resolve user",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Resolve user": {
      "main": [
        [
          {
            "node": "Read semester relations",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Read semester relations": {
      "main": [
        [
          {
            "node": "Collect existing semesters",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Collect existing semesters": {
      "main": [
        [
          {
            "node": "Add current semester",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Add current semester": {
      "main": [
        [
          {
            "node": "Confirm enrollment",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Existing user?": {
      "main": [
        [
          {
            "node": "Use existing user",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Create user",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "name": "Enroll Webhook Signups in the Current Notion Semester",
  "active": false,
  "pinData": {}
}