{ "name": "Scheduling Assistant - 04 Conflict Scan", "nodes": [ { "parameters": {}, "id": "workflow-trigger", "name": "When called by another workflow", "type": "n8n-nodes-base.executeWorkflowTrigger", "typeVersion": 1, "position": [ 250, 300 ] }, { "parameters": { "authentication": "oAuth2", "resource": "calendar", "operation": "getAll", "calendarId": "primary", "options": { "timeMin": "={{$json.validatedData.normalized.startTime}}", "timeMax": "={{$json.validatedData.normalized.endTime}}" } }, "id": "google-calendar-check", "name": "Check Google Calendar", "type": "n8n-nodes-base.googleCalendar", "typeVersion": 3, "position": [ 450, 150 ], "credentials": { "googleCalendarOAuth2Api": { "name": "" } } }, { "parameters": { "mode": "appendItems" }, "id": "merge-calendar-data", "name": "Merge Calendar Data", "type": "n8n-nodes-base.merge", "typeVersion": 3, "position": [ 650, 300 ], "notes": "Input 0: original validated data (always 1 item, from trigger). Input 1: calendar events (0 or more items). appendItems guarantees Analyze Conflicts runs even when the calendar returns 0 results (no conflicts = happy path)." }, { "parameters": { "jsCode": "// Analyze calendar conflicts\n//\n// Input structure after Merge (appendItems mode):\n// items[0] = original validated scheduling data (from trigger, guaranteed 1 item)\n// items[1..n] = calendar events in the requested time window (0 or more items)\n//\n// The Merge node ensures this code always runs, including when the calendar returns\n// 0 events (no conflicts), which is the happy path and the most common case.\n// Without the Merge, a 0-item getAll result would silently stop execution here.\n\nconst originalData = items[0].json.validatedData || items[0].json;\nconst requestedStart = new Date(originalData.normalized.startTime);\nconst requestedEnd = new Date(originalData.normalized.endTime);\n\n// Calendar events begin at index 1. Index 0 is the original scheduling data.\nconst calendarEvents = items.slice(1).map(item => item.json);\n\nconst conflicts = [];\n\n// Check each calendar event for time overlap with the requested window\nfor (const event of calendarEvents) {\n const eventStart = new Date(event.start?.dateTime || event.start?.date);\n const eventEnd = new Date(event.end?.dateTime || event.end?.date);\n\n if (requestedStart < eventEnd && requestedEnd > eventStart) {\n conflicts.push({\n title: event.summary,\n start: eventStart.toISOString(),\n end: eventEnd.toISOString(),\n attendees: event.attendees?.map(a => a.email) || [],\n location: event.location || 'Not specified'\n });\n }\n}\n\n// Generate up to 3 alternative time slots when conflicts are detected\nconst alternatives = [];\nif (conflicts.length > 0) {\n const duration = originalData.normalized.duration;\n\n const alt1Start = new Date(requestedStart);\n alt1Start.setHours(alt1Start.getHours() - 1);\n alternatives.push({\n startTime: alt1Start.toISOString(),\n endTime: new Date(alt1Start.getTime() + duration * 60000).toISOString(),\n reason: 'Earlier slot on same day'\n });\n\n const alt2Start = new Date(requestedEnd);\n alt2Start.setHours(alt2Start.getHours() + 1);\n alternatives.push({\n startTime: alt2Start.toISOString(),\n endTime: new Date(alt2Start.getTime() + duration * 60000).toISOString(),\n reason: 'Later slot on same day'\n });\n\n const alt3Start = new Date(requestedStart);\n alt3Start.setDate(alt3Start.getDate() + 1);\n alternatives.push({\n startTime: alt3Start.toISOString(),\n endTime: new Date(alt3Start.getTime() + duration * 60000).toISOString(),\n reason: 'Same time next day'\n });\n}\n\nreturn [{\n json: {\n ...originalData,\n conflictScan: {\n hasConflicts: conflicts.length > 0,\n conflictCount: conflicts.length,\n conflicts,\n alternatives,\n scannedAt: new Date().toISOString(),\n calendarSource: 'google_calendar'\n },\n stage: 'conflict_scanned',\n processedAt: new Date().toISOString()\n }\n}];" }, "id": "code-analyze-conflicts", "name": "Analyze Conflicts", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ 850, 300 ] }, { "parameters": { "conditions": { "boolean": [ { "value1": "={{$json.conflictScan.hasConflicts}}", "value2": false } ] } }, "id": "if-no-conflicts", "name": "No Conflicts?", "type": "n8n-nodes-base.if", "typeVersion": 1, "position": [ 1050, 300 ] }, { "parameters": { "assignments": { "assignments": [ { "id": "clear-data", "name": "clearData", "value": "={{$json}}", "type": "object" }, { "id": "next-workflow-export", "name": "nextWorkflow", "value": "05_route_export", "type": "string" } ] }, "options": {} }, "id": "set-clear-output", "name": "Set Clear Output", "type": "n8n-nodes-base.set", "typeVersion": 3.2, "position": [ 1250, 200 ] }, { "parameters": { "assignments": { "assignments": [ { "id": "conflict-data", "name": "conflictData", "value": "={{$json}}", "type": "object" }, { "id": "next-workflow-notify", "name": "nextWorkflow", "value": "06_notify", "type": "string" }, { "id": "notification-type-conflict", "name": "notificationType", "value": "conflict_detected", "type": "string" } ] }, "options": {} }, "id": "set-conflict-output", "name": "Set Conflict Output", "type": "n8n-nodes-base.set", "typeVersion": 3.2, "position": [ 1250, 400 ] }, { "parameters": { "workflowId": "={{$env.WORKFLOW_ID_ROUTE_EXPORT}}", "options": { "waitForSubWorkflow": false } }, "id": "execute-route-export", "name": "Trigger Route & Export", "type": "n8n-nodes-base.executeWorkflow", "typeVersion": 1, "position": [ 1450, 200 ] }, { "parameters": { "workflowId": "={{$env.WORKFLOW_ID_NOTIFY}}", "options": { "waitForSubWorkflow": false } }, "id": "execute-notify-conflict", "name": "Notify Conflicts", "type": "n8n-nodes-base.executeWorkflow", "typeVersion": 1, "position": [ 1450, 400 ] } ], "connections": { "When called by another workflow": { "main": [ [ { "node": "Check Google Calendar", "type": "main", "index": 0 }, { "node": "Merge Calendar Data", "type": "main", "index": 0 } ] ] }, "Check Google Calendar": { "main": [ [ { "node": "Merge Calendar Data", "type": "main", "index": 1 } ] ] }, "Merge Calendar Data": { "main": [ [ { "node": "Analyze Conflicts", "type": "main", "index": 0 } ] ] }, "Analyze Conflicts": { "main": [ [ { "node": "No Conflicts?", "type": "main", "index": 0 } ] ] }, "No Conflicts?": { "main": [ [ { "node": "Set Clear Output", "type": "main", "index": 0 } ], [ { "node": "Set Conflict Output", "type": "main", "index": 0 } ] ] }, "Set Clear Output": { "main": [ [ { "node": "Trigger Route & Export", "type": "main", "index": 0 } ] ] }, "Set Conflict Output": { "main": [ [ { "node": "Notify Conflicts", "type": "main", "index": 0 } ] ] } }, "settings": { "executionOrder": "v1", "saveExecutionProgress": true, "saveDataErrorExecution": "all", "saveDataSuccessExecution": "all" }, "staticData": null, "tags": [ { "name": "scheduling-assistant", "id": "scheduling-tag-001" }, { "name": "conflict-detection", "id": "conflict-tag-001" } ], "triggerCount": 0, "updatedAt": "2026-01-19T20:15:00.000Z", "versionId": "v1.1.0" }