{ "name": "24-hvac-field-service-orchestration", "nodes": [ { "parameters": { "httpMethod": "POST", "path": "hvac-service-request", "responseMode": "lastNode", "options": {} }, "id": "d4e5f6g7-1111-4444-8888-000000000001", "name": "Webhook", "type": "n8n-nodes-base.webhook", "typeVersion": 2, "position": [ 240, 500 ] }, { "parameters": { "model": "gpt-4o", "prompt": { "messages": [ { "role": "system", "content": "You are an expert HVAC dispatch AI. Analyze the service request. Extract: 1. device_type (e.g., AC, Heater, Refrigerator), 2. issue_summary (1 sentence), 3. required_parts (array of strings, e.g., ['compressor', 'freon']), 4. urgency (critical, high, normal). Respond ONLY in valid JSON format with these exact keys." }, { "role": "user", "content": "Customer: {{ $json.customer_name }}\nAddress: {{ $json.customer_address }}\nIssue Description: {{ $json.issue_description }}" } ] }, "options": { "responseFormat": "json_object" } }, "id": "d4e5f6g7-2222-4444-8888-000000000002", "name": "OpenAI", "type": "n8n-nodes-base.openAi", "typeVersion": 1.2, "position": [ 460, 500 ], "credentials": { "openAiApi": { "name": "" } } }, { "parameters": { "operation": "executeQuery", "query": "SELECT id, name, lat, lon, skills, current_load, van_inventory FROM technicians WHERE status = 'active';", "options": {} }, "id": "d4e5f6g7-3333-4444-8888-000000000003", "name": "PostgreSQL", "type": "n8n-nodes-base.postgres", "typeVersion": 2.5, "position": [ 680, 500 ], "credentials": { "postgres": { "name": "" } } }, { "parameters": { "jsCode": "// Score technicians returned by PostgreSQL against the original request and AI analysis.\nconst webhookItem = $('Webhook').first().json;\nconst request = webhookItem.body || webhookItem;\nconst customerLat = Number(request.customer_lat);\nconst customerLon = Number(request.customer_lon);\n\nif (!Number.isFinite(customerLat) || !Number.isFinite(customerLon)) {\n throw new Error('customer_lat and customer_lon must be valid numbers');\n}\n\nconst aiResponse = $('OpenAI').first().json;\nconst rawContent = aiResponse.content\n ?? aiResponse.message?.content\n ?? aiResponse.choices?.[0]?.message?.content\n ?? '{}';\n\nlet aiAnalysis;\ntry {\n aiAnalysis = typeof rawContent === 'string' ? JSON.parse(rawContent) : rawContent;\n} catch (error) {\n throw new Error('AI analysis is not valid JSON');\n}\n\nconst normalizeList = (value) => {\n if (Array.isArray(value)) return value.map((item) => String(item).trim().toLowerCase());\n if (typeof value === 'string') {\n return value.replace(/[{}]/g, '').split(',').map((item) => item.trim().replace(/^\"|\"$/g, '').toLowerCase()).filter(Boolean);\n }\n return [];\n};\n\nconst technicians = $input.all().map(({ json }) => ({\n id: String(json.id ?? ''),\n name: String(json.name ?? 'Technician'),\n lat: Number(json.lat),\n lon: Number(json.lon),\n skills: normalizeList(json.skills),\n currentLoad: Math.max(0, Number(json.current_load) || 0),\n inventory: normalizeList(json.van_inventory),\n})).filter((tech) => tech.id && Number.isFinite(tech.lat) && Number.isFinite(tech.lon));\n\nconst requiredSkill = String(aiAnalysis.device_type ?? '').trim().toLowerCase();\nconst requiredParts = normalizeList(aiAnalysis.required_parts);\n\nfunction distanceKm(lat1, lon1, lat2, lon2) {\n const radius = 6371;\n const dLat = (lat2 - lat1) * Math.PI / 180;\n const dLon = (lon2 - lon1) * Math.PI / 180;\n const a = Math.sin(dLat / 2) ** 2\n + Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) * Math.sin(dLon / 2) ** 2;\n return radius * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));\n}\n\nconst candidates = technicians\n .filter((tech) => tech.skills.includes(requiredSkill))\n .map((tech) => {\n const distance = distanceKm(customerLat, customerLon, tech.lat, tech.lon);\n const proximityScore = Math.max(0, 100 - distance * 5);\n const partsAvailable = requiredParts.every((part) => tech.inventory.includes(part));\n const partsScore = partsAvailable ? 100 : 0;\n const loadScore = Math.max(0, 100 - tech.currentLoad * 15);\n const score = proximityScore * 0.4 + partsScore * 0.4 + loadScore * 0.2;\n return { ...tech, distanceKm: Number(distance.toFixed(2)), partsAvailable, score: Number(score.toFixed(2)) };\n })\n .sort((a, b) => b.score - a.score || a.distanceKm - b.distanceKm || a.id.localeCompare(b.id));\n\nconst bestTech = candidates[0] || null;\nconst basePrice = aiAnalysis.urgency === 'critical' ? 150 : 100;\nconst travelFee = bestTech ? bestTech.distanceKm * 1.5 : 0;\nconst partsFee = requiredParts.length * 25;\n\nreturn [{ json: {\n request_id: request.request_id || null,\n customer_name: request.customer_name || null,\n customer_address: request.customer_address || null,\n ai_analysis: aiAnalysis,\n assigned_technician: bestTech,\n final_price_usd: Number((basePrice + travelFee + partsFee).toFixed(2)),\n parts_available: bestTech?.partsAvailable === true,\n dispatch_status: bestTech?.partsAvailable === true ? 'AUTO_DISPATCH_READY' : 'MANUAL_REVIEW_REQUIRED',\n candidate_count: candidates.length,\n} }];" }, "id": "d4e5f6g7-4444-4444-8888-000000000004", "name": "Code", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ 900, 500 ] }, { "parameters": { "rules": { "values": [ { "conditions": { "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "strict" }, "conditions": [ { "id": "cond1", "leftValue": "={{ $json.parts_available }}", "rightValue": true, "operator": { "type": "boolean", "operation": "equal" } }, { "id": "cond2", "leftValue": "={{ $json.assigned_technician }}", "rightValue": "", "operator": { "type": "object", "operation": "notEmpty" } } ], "combinator": "and" } } ] }, "options": { "fallbackOutput": "default" } }, "id": "d4e5f6g7-5555-4444-8888-000000000005", "name": "Switch", "type": "n8n-nodes-base.switch", "typeVersion": 3, "position": [ 1120, 500 ] }, { "parameters": { "calendar": { "__rl": true, "value": "primary", "mode": "list" }, "start": "={{ new Date(Date.now() + 86400000).toISOString() }}", "end": "={{ new Date(Date.now() + 90000000).toISOString() }}", "summary": "Service: {{ $json.ai_analysis.device_type }} for {{ $json.customer_name }}", "description": "Tech: {{ $json.assigned_technician.name }}\nAddress: {{ $json.customer_address }}\nIssue: {{ $json.ai_analysis.issue_summary }}\nEstimated Price: ${{ $json.final_price_usd }}", "additionalFields": { "attendees": [ "tech@example.com" ] } }, "id": "d4e5f6g7-6666-4444-8888-000000000006", "name": "Google Calendar", "type": "n8n-nodes-base.googleCalendar", "typeVersion": 1.1, "position": [ 1340, 420 ], "credentials": { "googleCalendarOAuth2Api": { "name": "" } } }, { "parameters": { "fromNumber": "+1234567890", "toNumber": "+989123456789", "message": "Hello {{ $json.customer_name }}. Your {{ $json.ai_analysis.device_type }} service is confirmed! Tech: {{ $json.assigned_technician.name }} will arrive tomorrow. Est. Price: ${{ $json.final_price_usd }}. Reply STOP to opt out.", "options": {} }, "id": "d4e5f6g7-7777-4444-8888-000000000007", "name": "Twilio", "type": "n8n-nodes-base.twilio", "typeVersion": 1, "position": [ 1560, 420 ], "credentials": { "twilioApi": { "name": "" } } }, { "parameters": { "select": "channel", "channelId": { "__rl": true, "value": "C9988776655", "mode": "list", "cachedResultName": "dispatch-manager-alerts" }, "text": "\u26a0\ufe0f *SERVICE REQUEST UNASSIGNED* \u26a0\ufe0f\n\nCustomer: {{ $json.customer_name }}\nIssue: {{ $json.ai_analysis.issue_summary }}\nReason: No technician with required skills/parts available.\n\nAction: Manual dispatch required or order parts.", "otherOptions": {} }, "id": "d4e5f6g7-8888-4444-8888-000000000008", "name": "Slack", "type": "n8n-nodes-base.slack", "typeVersion": 2.2, "position": [ 1340, 580 ], "credentials": { "slackApi": { "name": "" } } } ], "connections": { "Webhook": { "main": [ [ { "node": "OpenAI", "type": "main", "index": 0 } ] ] }, "OpenAI": { "main": [ [ { "node": "PostgreSQL", "type": "main", "index": 0 } ] ] }, "PostgreSQL": { "main": [ [ { "node": "Code", "type": "main", "index": 0 } ] ] }, "Code": { "main": [ [ { "node": "Switch", "type": "main", "index": 0 } ] ] }, "Switch": { "main": [ [ { "node": "Google Calendar", "type": "main", "index": 0 } ], [ { "node": "Slack", "type": "main", "index": 0 } ] ] }, "Google Calendar": { "main": [ [ { "node": "Twilio", "type": "main", "index": 0 } ] ] } }, "active": false, "settings": { "executionOrder": "v1", "saveManualExecutions": true, "saveDataErrorExecution": "all", "saveDataSuccessExecution": "all" }, "id": "24-hvac-field-service-orchestration", "tags": [] }