05-telegram-images-advanced.json

{
  "name": "Message487 · 05 · Telegram images · rich messages and retry progress",
  "active": false,
  "nodes": [
    {
      "id": "38d3a705-5f0a-5a38-9ab8-1ab873b854a7",
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      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2.1,
      "position": [
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      ],
      "parameters": {
        "httpMethod": "POST",
        "path": "message487/05-telegram-images-advanced",
        "authentication": "headerAuth",
        "responseMode": "responseNode",
        "options": {}
      },
      "webhookId": "35f65d0e-fb9a-55c1-966a-902f19d1dbcd"
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    {
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      "name": "Validate event",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
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      ],
      "parameters": {
        "jsCode": "const processImages = true;\nconst event = $('Webhook').first().json.body;\nlet reason = '';\nif (!event || event.schema_version !== 1 || typeof event.event_id !== 'string' ||\n    !event.event_id || !['test', 'notification', 'sms'].includes(event.message_type) ||\n    typeof event.text !== 'string') reason = 'Invalid Message487 event';\nconst images = event?.images ?? [];\nif (!Array.isArray(images)) reason = 'images must be an array';\nelse if (processImages && images.some(image => !image || !['image/jpeg', 'image/png'].includes(image.mime_type) ||\n    !Number.isInteger(image.width) || image.width <= 0 || !Number.isInteger(image.height) || image.height <= 0 ||\n    typeof image.data_base64 !== 'string' || !image.data_base64.length ||\n    image.data_base64.length % 4 !== 0 || !/^[A-Za-z0-9+/]*={0,2}$/.test(image.data_base64))) {\n  reason = 'Invalid JPEG/PNG image';\n}\nreturn [{ json: { valid: !reason, reason, event_id: event?.event_id ?? null } }];\n"
      }
    },
    {
      "id": "811113f7-8af2-548b-bb20-49cf23f91e8d",
      "name": "Valid event",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [
        440,
        0
      ],
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "id": "ad1abe2e-40cb-5729-b1e2-5ab82f4422e0",
              "leftValue": "={{ $json.valid }}",
              "rightValue": true,
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      }
    },
    {
      "id": "f59f466f-0005-50b9-bf71-768b5d48f191",
      "name": "Reject",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.4,
      "position": [
        640,
        300
      ],
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ { status: \"rejected\", event_id: $json.event_id, reason: $json.reason } }}",
        "options": {
          "responseCode": 400
        }
      }
    },
    {
      "id": "16c27112-6589-5c27-99ca-3f13b3e9a84f",
      "name": "Configure",
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
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      ],
      "parameters": {
        "assignments": {
          "assignments": [
            {
              "id": "cc14013d-4c02-5063-b108-47cb28b60fec",
              "name": "chat_id",
              "value": "REPLACE_WITH_CHAT_ID",
              "type": "string"
            },
            {
              "id": "fd0cda76-b600-5cbd-9182-6ffc99514f16",
              "name": "sent_parts_table_id",
              "value": "REPLACE_WITH_SENT_PARTS_TABLE_ID",
              "type": "string"
            }
          ]
        },
        "options": {}
      }
    },
    {
      "id": "687f24ac-e08d-5fb6-be5d-a5c2d6beccff",
      "name": "Prepare Telegram text",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
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      ],
      "parameters": {
        "jsCode": "const timeZone = 'UTC';\nconst locale = 'en-GB';\nconst messageTypes = { sms: 'SMS', notification: 'Notification', test: 'Test' };\nconst event = $('Webhook').first().json.body;\n\nif (!event || event.schema_version !== 1 ||\n    typeof event.event_id !== 'string' || !event.event_id ||\n    !Object.hasOwn(messageTypes, event.message_type) ||\n    typeof event.text !== 'string') {\n  throw new Error('Invalid Message487 event');\n}\n\nconst escapeHtml = value => value.replace(/[&<>]/g, character => ({\n  '&': '&amp;', '<': '&lt;', '>': '&gt;',\n})[character]);\nconst firstText = (...values) => values.find(value => typeof value === 'string' && value) || '—';\nconst date = new Date(event.occurred_at);\nconst timestamp = typeof event.occurred_at === 'string' && !Number.isNaN(date.getTime())\n  ? new Intl.DateTimeFormat(locale, {\n    timeZone, day: '2-digit', month: '2-digit', year: 'numeric',\n    hour: '2-digit', minute: '2-digit', second: '2-digit', hourCycle: 'h23',\n  }).format(date).replace(/,/g, '')\n  : '—';\nconst source = firstText(event.sender, event.source_name, event.source);\nconst device = firstText(event.device_code, event.device_id);\nconst segments = [\n  { text: 'Message487: ', bold: false },\n  { text: source, bold: true },\n  { text: '\\n', bold: false },\n  { text: `${messageTypes[event.message_type]}\\n${device}\\n${timestamp}`, bold: true },\n  { text: '\\n', bold: false },\n  { text: typeof event.title === 'string' && event.title ? `${event.title}\\n` : '', bold: false },\n  { text: event.text, bold: false },\n];\n\n// Split unescaped text and close formatting in each part to keep HTML valid.\nconst chunks = [];\nlet html = '';\nlet length = 0;\nfor (const segment of segments) {\n  let run = '';\n  const flush = () => {\n    if (run) {\n      const escaped = escapeHtml(run);\n      html += segment.bold ? `<b>${escaped}</b>` : escaped;\n      run = '';\n    }\n  };\n  for (const character of segment.text) {\n    if (length + character.length > 3500) {\n      flush();\n      chunks.push(html);\n      html = '';\n      length = 0;\n    }\n    run += character;\n    length += character.length;\n  }\n  flush();\n}\nif (html) chunks.push(html);\n\nreturn chunks.map((part, index) => ({\n  json: {\n    telegram_text: chunks.length > 1 ? `[${index + 1}/${chunks.length}]\\n${part}` : part,\n  },\n}));\n"
      }
    },
    {
      "id": "0d7d4c27-ed76-5a97-8380-2fe96ec60f17",
      "name": "Prepare image parts",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        1080,
        0
      ],
      "parameters": {
        "jsCode": "// Attach all media to the first text part as one Rich Message.\nconst event = $('Webhook').first().json.body;\nconst images = event.images ?? [];\nif (!Array.isArray(images)) throw new Error('Invalid images collection');\nconst result = $input.all();\nconst gallery = [];\nconst icons = [];\nconst binaryImage = (image, index) => {\n  if (!image || !['image/jpeg', 'image/png'].includes(image.mime_type) ||\n      typeof image.data_base64 !== 'string' || !image.data_base64.length ||\n      image.data_base64.length % 4 !== 0 ||\n      !/^[A-Za-z0-9+/]*={0,2}$/.test(image.data_base64)) {\n    throw new Error(`Invalid image ${index + 1}`);\n  }\n  const extension = image.mime_type === 'image/png' ? 'png' : 'jpg';\n  const kind = ['attachment', 'avatar', 'app_icon'].includes(image.kind) ? image.kind : 'attachment';\n  return { data: image.data_base64, mimeType: image.mime_type, fileName: `${kind}-${index + 1}.${extension}` };\n};\nconst blocks = [];\nconst binary = {};\nfor (const [index, image] of images.entries()) {\n  binary[`image${index}`] = binaryImage(image, index);\n  const photo = { type: 'photo', photo: { type: 'photo', media: `attach://file${index}` } };\n  if (['avatar', 'app_icon'].includes(image.kind)) {\n    photo.caption = { text: image.kind === 'avatar' ? 'Avatar' : 'Application icon' };\n    icons.push(photo);\n  } else if (image.presentation === 'gallery') {\n    gallery.push(photo);\n  } else if (image.presentation === 'big_picture') {\n    blocks.push(photo);\n  } else {\n    blocks.push({ type: 'document', document: { type: 'document', media: `attach://file${index}` } });\n  }\n}\nfor (const photos of [gallery, icons]) {\n  if (photos.length) blocks.push(photos.length > 1 ? { type: 'collage', blocks: photos } : photos[0]);\n}\n// Preserve the formatter's bold/italic text without interpreting escaped user HTML.\nif (images.length) {\n  const first = result[0];\n  if (!first || typeof first.json.telegram_text !== 'string') throw new Error('Missing notification text');\n  let bold = false;\n  let italic = false;\n  const text = [];\n  for (const token of first.json.telegram_text.split(/(<\\/?[bi]>)/)) {\n    if (token === '<b>' || token === '</b>') { bold = token === '<b>'; continue; }\n    if (token === '<i>' || token === '</i>') { italic = token === '<i>'; continue; }\n    if (!token) continue;\n    let value = token.replace(/&lt;/g, '<').replace(/&gt;/g, '>').replace(/&amp;/g, '&');\n    if (italic) value = { type: 'italic', text: value };\n    if (bold) value = { type: 'bold', text: value };\n    text.push(value);\n  }\n  blocks.unshift({ type: 'paragraph', text });\n  first.json.telegram_operation = 'sendRichMessage';\n  first.json.rich_message = { blocks };\n  first.binary = binary;\n}\nreturn result;\n"
      }
    },
    {
      "id": "fdae84e7-ef7a-5099-b30e-1b7cfac40624",
      "name": "Loop Over Parts",
      "type": "n8n-nodes-base.splitInBatches",
      "typeVersion": 3,
      "position": [
        1500,
        0
      ],
      "parameters": {
        "batchSize": 1,
        "options": {}
      }
    },
    {
      "id": "19ede2fa-2fc9-5a7f-88f4-428855adbcfd",
      "name": "Respond",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.4,
      "position": [
        1720,
        -200
      ],
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ { status: 'accepted', event_id: $('Webhook').first().json.body.event_id } }}",
        "options": {
          "responseCode": 200
        }
      }
    },
    {
      "id": "e0d4c284-21fe-5de6-baf2-1ca9d5c04a8a",
      "name": "Create Part Keys",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        1300,
        0
      ],
      "parameters": {
        "jsCode": "const eventId = $('Webhook').first().json.body.event_id;\nreturn $input.all().map((item, index) => ({ ...item, json: { ...item.json, part_key: `${eventId}:${index + 1}` }, pairedItem: { item: index } }));"
      }
    },
    {
      "id": "55e0c21d-6f21-53de-ba82-097385bed594",
      "name": "Check already sent",
      "type": "n8n-nodes-base.dataTable",
      "typeVersion": 1.1,
      "position": [
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      ],
      "parameters": {
        "resource": "row",
        "operation": "get",
        "dataTableId": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $('Configure').first().json.sent_parts_table_id }}"
        },
        "matchType": "allConditions",
        "filters": {
          "conditions": [
            {
              "keyName": "part_key",
              "condition": "eq",
              "keyValue": "={{ $json.part_key }}"
            }
          ]
        },
        "limit": 1
      },
      "alwaysOutputData": true
    },
    {
      "id": "96cc7f72-4606-53fc-89a1-b0d82ebee43e",
      "name": "Already sent",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [
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        100
      ],
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "id": "e24f393c-e99c-5abb-925b-f25d8bf7313d",
              "leftValue": "={{ $json.id !== undefined && $json.id !== null }}",
              "rightValue": true,
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      }
    },
    {
      "id": "ae1a851b-cfe8-5c99-8441-e16ad4a421c2",
      "name": "Restore pending part",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        2160,
        100
      ],
      "parameters": {
        "jsCode": "const item = $('Loop Over Parts').item;\nreturn [{ json: { ...item.json }, ...(item.binary ? { binary: item.binary } : {}) }];"
      }
    },
    {
      "id": "56cb0cc1-ac17-5d2a-81fb-c7f5ee311b06",
      "name": "Is rich message",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [
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        100
      ],
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "id": "c7e6955a-73ca-51d8-9e0c-584e8fbcf909",
              "leftValue": "={{ $json.telegram_operation === \"sendRichMessage\" }}",
              "rightValue": true,
              "operator": {
                "type": "boolean",
                "operation": "true",
                "singleValue": true
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      }
    },
    {
      "id": "28aba54a-38a2-5e62-9208-760a120930d5",
      "name": "Send rich message",
      "type": "CUSTOM.telegramAlbum487",
      "typeVersion": 1,
      "position": [
        2600,
        0
      ],
      "parameters": {
        "operation": "sendRichMessage",
        "chatId": "={{ $('Configure').first().json.chat_id }}",
        "binaryProperties": "={{ Object.keys($binary).join(',') }}",
        "richMessage": "={{ $json.rich_message }}"
      }
    },
    {
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      "name": "Send text",
      "type": "n8n-nodes-base.telegram",
      "typeVersion": 1.2,
      "position": [
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      ],
      "parameters": {
        "resource": "message",
        "operation": "sendMessage",
        "chatId": "={{ $('Configure').first().json.chat_id }}",
        "additionalFields": {
          "appendAttribution": false,
          "parse_mode": "HTML",
          "disable_web_page_preview": true
        },
        "text": "={{ $json.telegram_text }}"
      }
    },
    {
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      "name": "Remember part key",
      "type": "n8n-nodes-base.dataTable",
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      "position": [
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      ],
      "parameters": {
        "resource": "row",
        "operation": "upsert",
        "dataTableId": {
          "__rl": true,
          "mode": "id",
          "value": "={{ $('Configure').first().json.sent_parts_table_id }}"
        },
        "matchType": "allConditions",
        "filters": {
          "conditions": [
            {
              "keyName": "part_key",
              "condition": "eq",
              "keyValue": "={{ $('Loop Over Parts').item.json.part_key }}"
            }
          ]
        },
        "columns": {
          "mappingMode": "defineBelow",
          "value": {
            "part_key": "={{ $('Loop Over Parts').item.json.part_key }}"
          },
          "matchingColumns": [
            "part_key"
          ],
          "schema": [
            {
              "id": "part_key",
              "displayName": "part_key",
              "required": false,
              "defaultMatch": false,
              "display": true,
              "type": "string",
              "readOnly": false,
              "removed": false
            }
          ],
          "attemptToConvertTypes": false,
          "convertFieldsToString": false
        },
        "options": {}
      }
    }
  ],
  "connections": {
    "Webhook": {
      "main": [
        [
          {
            "node": "Validate event",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Validate event": {
      "main": [
        [
          {
            "node": "Valid event",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Valid event": {
      "main": [
        [
          {
            "node": "Configure",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Reject",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Configure": {
      "main": [
        [
          {
            "node": "Prepare Telegram text",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Prepare Telegram text": {
      "main": [
        [
          {
            "node": "Prepare image parts",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Loop Over Parts": {
      "main": [
        [
          {
            "node": "Respond",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Check already sent",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Prepare image parts": {
      "main": [
        [
          {
            "node": "Create Part Keys",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Create Part Keys": {
      "main": [
        [
          {
            "node": "Loop Over Parts",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check already sent": {
      "main": [
        [
          {
            "node": "Already sent",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Already sent": {
      "main": [
        [
          {
            "node": "Loop Over Parts",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Restore pending part",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Restore pending part": {
      "main": [
        [
          {
            "node": "Is rich message",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Is rich message": {
      "main": [
        [
          {
            "node": "Send rich message",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Send text",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Send rich message": {
      "main": [
        [
          {
            "node": "Remember part key",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Send text": {
      "main": [
        [
          {
            "node": "Remember part key",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Remember part key": {
      "main": [
        [
          {
            "node": "Loop Over Parts",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1",
    "timezone": "UTC"
  }
}