{ "name": "Telegram School Intake → Postgres → Paperless v1.1", "active": false, "isArchived": false, "nodes": [ { "parameters": { "httpMethod": "POST", "path": "school/intake/upload", "responseMode": "lastNode", "responseData": "allEntries", "options": { "rawBody": true } }, "id": "school-intake-webhook", "name": "School Intake Webhook", "type": "n8n-nodes-base.webhook", "typeVersion": 2, "position": [ -1180, 0 ] }, { "parameters": { "jsCode": "\nconst req = $input.first().json;\nconst body = req.body || {};\nconst binary = $input.first().binary || {};\nconst upload = binary.data || Object.values(binary)[0];\nif (!upload) throw new Error('Expected multipart file upload in the webhook request.');\nconst required = ['class_name', 'assignment_name', 'submission_kind'];\nfor (const key of required) {\n if (!body[key] || !String(body[key]).trim()) {\n throw new Error('Missing required form field: ' + key + '. Required fields: class_name, assignment_name, submission_kind.');\n }\n}\nconst sanitize = (value, fallback = 'item') => String(value || fallback)\n .trim()\n .toLowerCase()\n .replace(/[^a-z0-9]+/g, '-')\n .replace(/^-+|-+$/g, '')\n .slice(0, 80) || fallback;\nconst stableHash = (str) => {\n let h1 = 0xdeadbeef;\n let h2 = 0x41c6ce57;\n for (let i = 0; i < str.length; i++) {\n const ch = str.charCodeAt(i);\n h1 = Math.imul(h1 ^ ch, 2654435761);\n h2 = Math.imul(h2 ^ ch, 1597334677);\n }\n h1 = Math.imul(h1 ^ (h1 >>> 16), 2246822507) ^ Math.imul(h2 ^ (h2 >>> 13), 3266489909);\n h2 = Math.imul(h2 ^ (h2 >>> 16), 2246822507) ^ Math.imul(h1 ^ (h1 >>> 13), 3266489909);\n return ((h2 >>> 0).toString(16).padStart(8, '0') + (h1 >>> 0).toString(16).padStart(8, '0'));\n};\nconst originalName = upload.fileName || body.filename || 'upload.bin';\nconst extension = (() => {\n const m = String(originalName).match(/(\\.[A-Za-z0-9]{1,10})$/);\n return m ? m[1].toLowerCase() : '';\n})();\nconst fileBytes = Buffer.from(upload.data, 'base64');\nconst checksum = stableHash([originalName, upload.mimeType || '', String(fileBytes.length), upload.data].join('|'));\nconst now = new Date();\nconst intakeId = [\n 'school',\n now.toISOString().slice(0,10).replace(/-/g,''),\n sanitize(body.class_name),\n sanitize(body.assignment_name),\n checksum.slice(0, 12)\n].join('-');\nconst storedFilename = intakeId + extension;\nconst title = [body.class_name, body.assignment_name, body.submission_kind].map(v => String(v).trim()).join(' — ');\nreturn [{\n json: {\n intake_id: intakeId,\n class_name: String(body.class_name).trim(),\n assignment_name: String(body.assignment_name).trim(),\n submission_kind: String(body.submission_kind).trim(),\n semester: body.semester ? String(body.semester).trim() : null,\n course_code: body.course_code ? String(body.course_code).trim() : null,\n paper_kind: body.paper_kind ? String(body.paper_kind).trim() : null,\n notes: body.notes ? String(body.notes).trim().slice(0, 4000) : null,\n source: body.source ? String(body.source).trim() : 'telegram',\n telegram_chat_id: body.telegram_chat_id ? String(body.telegram_chat_id).trim() : null,\n telegram_message_id: body.telegram_message_id ? String(body.telegram_message_id).trim() : null,\n original_filename: originalName,\n stored_filename: storedFilename,\n mime_type: upload.mimeType || 'application/octet-stream',\n file_size_bytes: fileBytes.length,\n checksum_sha256: checksum,\n paperless_title: title,\n received_at: now.toISOString()\n },\n binary: {\n data: {\n ...upload,\n fileName: storedFilename,\n mimeType: upload.mimeType || 'application/octet-stream'\n }\n }\n}];" }, "id": "normalize-request", "name": "Normalize Intake Request", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ -920, 0 ] }, { "parameters": { "operation": "executeQuery", "query": "INSERT INTO school_paperless_intake (\n intake_id,\n class_name,\n assignment_name,\n submission_kind,\n semester,\n course_code,\n paper_kind,\n notes,\n source,\n telegram_chat_id,\n telegram_message_id,\n original_filename,\n stored_filename,\n mime_type,\n file_size_bytes,\n checksum_sha256,\n status,\n received_at\n)\nVALUES (\n '{{ $json.intake_id }}',\n '{{ $json.class_name.replace(/'/g, \"''\") }}',\n '{{ $json.assignment_name.replace(/'/g, \"''\") }}',\n '{{ $json.submission_kind.replace(/'/g, \"''\") }}',\n {{ $json.semester ? \"'\" + $json.semester.replace(/'/g, \"''\") + \"'\" : 'NULL' }},\n {{ $json.course_code ? \"'\" + $json.course_code.replace(/'/g, \"''\") + \"'\" : 'NULL' }},\n {{ $json.paper_kind ? \"'\" + $json.paper_kind.replace(/'/g, \"''\") + \"'\" : 'NULL' }},\n {{ $json.notes ? \"'\" + $json.notes.replace(/'/g, \"''\") + \"'\" : 'NULL' }},\n '{{ $json.source.replace(/'/g, \"''\") }}',\n {{ $json.telegram_chat_id ? \"'\" + $json.telegram_chat_id.replace(/'/g, \"''\") + \"'\" : 'NULL' }},\n {{ $json.telegram_message_id ? \"'\" + $json.telegram_message_id.replace(/'/g, \"''\") + \"'\" : 'NULL' }},\n '{{ $json.original_filename.replace(/'/g, \"''\") }}',\n '{{ $json.stored_filename.replace(/'/g, \"''\") }}',\n '{{ $json.mime_type.replace(/'/g, \"''\") }}',\n {{ $json.file_size_bytes }},\n '{{ $json.checksum_sha256 }}',\n 'received',\n '{{ $json.received_at }}'::timestamptz\n)\nON CONFLICT (intake_id) DO UPDATE SET\n class_name = EXCLUDED.class_name,\n assignment_name = EXCLUDED.assignment_name,\n submission_kind = EXCLUDED.submission_kind,\n semester = EXCLUDED.semester,\n course_code = EXCLUDED.course_code,\n paper_kind = EXCLUDED.paper_kind,\n notes = EXCLUDED.notes,\n source = EXCLUDED.source,\n telegram_chat_id = EXCLUDED.telegram_chat_id,\n telegram_message_id = EXCLUDED.telegram_message_id,\n original_filename = EXCLUDED.original_filename,\n stored_filename = EXCLUDED.stored_filename,\n mime_type = EXCLUDED.mime_type,\n file_size_bytes = EXCLUDED.file_size_bytes,\n checksum_sha256 = EXCLUDED.checksum_sha256,\n status = 'received',\n received_at = EXCLUDED.received_at,\n updated_at = NOW();" }, "id": "pg-insert-received", "name": "Postgres Upsert Intake Received", "type": "n8n-nodes-base.postgres", "typeVersion": 2.6, "position": [ -660, 0 ], "credentials": { "postgres": { "id": "SETUP_REQUIRED", "name": "Shared Postgres" } } }, { "parameters": { "method": "POST", "url": "={{($env.PAPERLESS_BASE_URL || 'https://paperless.paccoco.com').replace(/\\/$/, '') + '/api/documents/post_document/'}}", "sendHeaders": true, "headerParameters": { "parameters": [ { "name": "Authorization", "value": "={{'Token ' + $env.PAPERLESS_API_TOKEN}}" } ] }, "sendBody": true, "contentType": "multipart-form-data", "bodyParameters": { "parameters": [ { "name": "document", "value": "data", "parameterType": "formBinaryData" }, { "name": "title", "value": "={{$json.paperless_title}}" } ] }, "options": { "timeout": 120000 } }, "id": "paperless-upload", "name": "Upload to Paperless", "type": "n8n-nodes-base.httpRequest", "typeVersion": 4.2, "position": [ -400, 0 ] }, { "parameters": { "jsCode": "\nconst intake = $('Normalize Intake Request').first().json;\nconst response = $json;\nconst taskId = response.task_id || response.id || response.document?.id || null;\nlet paperlessDocumentId = response.document_id || response.document?.id || null;\nif (!paperlessDocumentId && typeof response === 'object' && response?.id && !response?.task_id) {\n paperlessDocumentId = response.id;\n}\nreturn [{ json: {\n ...intake,\n paperless_task_id: taskId ? String(taskId) : null,\n paperless_document_id: paperlessDocumentId ? String(paperlessDocumentId) : null,\n paperless_response: response,\n uploaded_at: new Date().toISOString()\n}}];" }, "id": "capture-paperless-response", "name": "Capture Paperless Response", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ -140, 0 ] }, { "parameters": { "operation": "executeQuery", "query": "UPDATE school_paperless_intake\nSET\n paperless_task_id = {{ $json.paperless_task_id ? \"'\" + $json.paperless_task_id.replace(/'/g, \"''\") + \"'\" : 'NULL' }},\n paperless_document_id = {{ $json.paperless_document_id ? \"'\" + $json.paperless_document_id.replace(/'/g, \"''\") + \"'\" : 'NULL' }},\n paperless_title = '{{ $json.paperless_title.replace(/'/g, \"''\") }}',\n status = 'uploaded',\n uploaded_at = '{{ $json.uploaded_at }}'::timestamptz,\n updated_at = NOW()\nWHERE intake_id = '{{ $json.intake_id }}';" }, "id": "pg-mark-uploaded", "name": "Postgres Mark Uploaded", "type": "n8n-nodes-base.postgres", "typeVersion": 2.6, "position": [ 120, 0 ], "credentials": { "postgres": { "id": "SETUP_REQUIRED", "name": "Shared Postgres" } } }, { "parameters": { "jsCode": "\nreturn [{\n json: {\n ok: true,\n intake_id: $json.intake_id,\n status: 'uploaded',\n paperless_task_id: $json.paperless_task_id,\n paperless_document_id: $json.paperless_document_id,\n paperless_title: $json.paperless_title,\n stored_filename: $json.stored_filename,\n received_at: $json.received_at,\n uploaded_at: $json.uploaded_at\n }\n}];" }, "id": "success-response", "name": "Return Success Payload", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ 360, 0 ] } ], "connections": { "School Intake Webhook": { "main": [ [ { "node": "Normalize Intake Request", "type": "main", "index": 0 } ] ] }, "Normalize Intake Request": { "main": [ [ { "node": "Postgres Upsert Intake Received", "type": "main", "index": 0 } ] ] }, "Postgres Upsert Intake Received": { "main": [ [ { "node": "Upload to Paperless", "type": "main", "index": 0 } ] ] }, "Upload to Paperless": { "main": [ [ { "node": "Capture Paperless Response", "type": "main", "index": 0 } ] ] }, "Capture Paperless Response": { "main": [ [ { "node": "Postgres Mark Uploaded", "type": "main", "index": 0 } ] ] }, "Postgres Mark Uploaded": { "main": [ [ { "node": "Return Success Payload", "type": "main", "index": 0 } ] ] } }, "settings": { "executionOrder": "v1", "binaryMode": "separate" }, "staticData": null, "meta": { "templateCredsSetupCompleted": false, "artifactVersion": "v1.1" }, "pinData": {}, "tags": [ { "name": "school" }, { "name": "paperless" }, { "name": "postgres" }, { "name": "telegram" } ] }