{
  "name": "JSON Feed Telegram Alert",
  "nodes": [
    {
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "cronExpression",
              "expression": "*/5 * * * *"
            }
          ]
        }
      },
      "id": "trigger-5min",
      "name": "Ogni 5 minuti",
      "type": "n8n-nodes-base.scheduleTrigger",
      "typeVersion": 1.2,
      "position": [
        0,
        0
      ]
    },
    {
      "parameters": {
        "method": "GET",
        "url": "https://YOUR_FEED_HOST/lista.json",
        "options": {
          "timeout": 10000,
          "response": {
            "response": {
              "responseFormat": "json"
            }
          }
        }
      },
      "id": "fetch-feed",
      "name": "Leggi il feed JSON",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        220,
        0
      ]
    },
    {
      "parameters": {
        "mode": "runOnceForAllItems",
        "jsCode": "function selectEvents({body,arrayField,filterField,filterValues,timestampField,lastTs}) {\n  if(!body||typeof body!=='object'||Array.isArray(body))throw new Error('The feed must return a JSON object.');\n  if([arrayField,filterField,timestampField].some(value=>typeof value!=='string'||!value))throw new Error('Configure the feed field names.');\n  if(!Array.isArray(filterValues)||filterValues.some(value=>typeof value!=='string'))throw new Error('filterValues must be an array of strings.');\n  if(typeof lastTs!=='string')throw new Error('The saved timestamp must be a string.');\n  const raw=body[arrayField]??[];\n  if(!Array.isArray(raw))throw new Error('The configured feed array must be an array.');\n  const eligible=[];\n  for(const entry of raw){\n    if(!entry||typeof entry!=='object'||Array.isArray(entry))throw new Error('Feed entries must be objects.');\n    if(filterValues.length&&!filterValues.includes(entry[filterField]))continue;\n    const value=entry[timestampField];\n    if(value!=null&&typeof value!=='string'&&!(typeof value==='number'&&Number.isFinite(value)))throw new Error('Feed timestamps must be comparable strings or finite numbers.');\n    const timestamp=value==null?'':String(value);\n    if(timestamp>lastTs)eligible.push({entry,timestamp});\n  }\n  eligible.sort((a,b)=>a.timestamp<b.timestamp?-1:a.timestamp>b.timestamp?1:0);\n  const escape=text=>text.replaceAll('&','&amp;').replaceAll('<','&lt;').replaceAll('>','&gt;');\n  const notifications=eligible.map(({entry,timestamp})=>{\n    const rawText='🔔 '+(entry[filterField]||'evento')+'\\n'+JSON.stringify(entry).slice(0,300);\n    const text=escape(rawText);\n    if(!text||text.length>4096)throw new Error('A Telegram alert exceeds 4096 characters.');\n    return {text,timestamp};\n  });\n  return {notifications,count:notifications.length,nextTimestamp:eligible.at(-1)?.timestamp??lastTs};\n}\n\n\nconst state=$getWorkflowStaticData('global');\nconst selected=selectEvents({body:$input.first().json,...{\"arrayField\":\"items\",\"filterField\":\"tipo\",\"filterValues\":[],\"timestampField\":\"ts\"},lastTs:state.lastTs||''});\nif(selected.count)state.lastTs=selected.nextTimestamp;\nreturn selected.notifications.map(item=>({json:{text:item.text}}));\n"
      },
      "id": "filter-new",
      "name": "Solo voci nuove e filtrate",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        440,
        0
      ]
    },
    {
      "parameters": {
        "resource": "message",
        "operation": "sendMessage",
        "chatId": "@YOUR_TELEGRAM_CHANNEL",
        "text": "={{ $json.text }}",
        "additionalFields": {
          "parse_mode": "HTML",
          "appendAttribution": false
        }
      },
      "id": "send-telegram",
      "name": "Manda su Telegram",
      "type": "n8n-nodes-base.telegram",
      "typeVersion": 1.2,
      "position": [
        660,
        0
      ]
    }
  ],
  "connections": {
    "Ogni 5 minuti": {
      "main": [
        [
          {
            "node": "Leggi il feed JSON",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Leggi il feed JSON": {
      "main": [
        [
          {
            "node": "Solo voci nuove e filtrate",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Solo voci nuove e filtrate": {
      "main": [
        [
          {
            "node": "Manda su Telegram",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1",
    "timezone": "UTC"
  },
  "active": false,
  "pinData": {}
}