{
  "name": "CrawlVolt - Daily content change check",
  "nodes": [
    {
      "parameters": {},
      "id": "manual-preview",
      "name": "Manual preview",
      "type": "n8n-nodes-base.manualTrigger",
      "typeVersion": 1,
      "position": [
        180,
        160
      ]
    },
    {
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "days",
              "daysInterval": 1,
              "triggerAtHour": 9,
              "triggerAtMinute": 0
            }
          ]
        }
      },
      "id": "daily-trigger",
      "name": "Daily at 09:00 UTC",
      "type": "n8n-nodes-base.scheduleTrigger",
      "typeVersion": 1.2,
      "position": [
        180,
        380
      ]
    },
    {
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "return [{ json: { source_url: \"https://example.com\" } }];"
      },
      "id": "page-settings",
      "name": "Page settings",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        420,
        280
      ]
    },
    {
      "parameters": {
        "method": "POST",
        "url": "https://www.crawlvolt.com/v1/scrape",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Content-Type",
              "value": "application/json"
            },
            {
              "name": "Idempotency-Key",
              "value": "={{$execution.id}}-refresh-page"
            }
          ]
        },
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({ url: $json.source_url, formats: [\"markdown\"], only_main_content: true, cache_ttl_secs: 0 }) }}",
        "options": {
          "timeout": 60000
        }
      },
      "id": "refresh-page",
      "name": "Extract Markdown",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        660,
        280
      ]
    },
    {
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "const result = $input.first().json;\nconst markdown = result.outputs?.markdown;\nif (typeof markdown !== 'string' || !markdown.trim()) {\n  throw new Error('No Markdown returned. The previous hash will be preserved.');\n}\nconst sourceUrl = $('Page settings').first().json.source_url;\nreturn [{ json: { source_url: sourceUrl, markdown } }];\n"
      },
      "id": "validate-markdown",
      "name": "Validate Markdown",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        900,
        280
      ]
    },
    {
      "parameters": {
        "action": "hash",
        "binaryData": false,
        "type": "SHA256",
        "value": "={{ $json.markdown }}",
        "dataPropertyName": "hash",
        "encoding": "hex"
      },
      "id": "hash-markdown",
      "name": "Hash Markdown",
      "type": "n8n-nodes-base.crypto",
      "typeVersion": 1,
      "position": [
        1140,
        280
      ]
    },
    {
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "const item = $input.first().json;\nif (typeof item.hash !== 'string' || !/^[a-f0-9]{64}$/.test(item.hash)) {\n  throw new Error('Expected a SHA-256 hash from the Crypto node.');\n}\nif ($execution.mode !== 'production') {\n  return [{ json: { ...item, change: 'preview', needs_update: false,\n    note: 'Manual preview: static data is not persisted. Use a published scheduled execution to verify changes.' } }];\n}\nconst state = $getWorkflowStaticData('global');\nstate.pages ??= {};\nconst previous = state.pages[item.source_url];\nconst change = !previous ? 'baseline' : previous.hash === item.hash ? 'unchanged' : 'changed';\nstate.pages[item.source_url] = { hash: item.hash };\nreturn [{ json: { ...item, change, needs_update: change !== 'unchanged' } }];\n"
      },
      "id": "compare-content",
      "name": "Compare content",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        1380,
        280
      ]
    }
  ],
  "connections": {
    "Manual preview": {
      "main": [
        [
          {
            "node": "Page settings",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Daily at 09:00 UTC": {
      "main": [
        [
          {
            "node": "Page settings",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Page settings": {
      "main": [
        [
          {
            "node": "Extract Markdown",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Extract Markdown": {
      "main": [
        [
          {
            "node": "Validate Markdown",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Validate Markdown": {
      "main": [
        [
          {
            "node": "Hash Markdown",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Hash Markdown": {
      "main": [
        [
          {
            "node": "Compare content",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "pinData": {},
  "settings": {
    "executionOrder": "v1",
    "timezone": "UTC"
  },
  "active": false
}