{ "name": "Disaster NLP \u2014 Alert Routing Workflow", "nodes": [ { "parameters": { "rule": { "interval": [ { "field": "minutes", "minutesInterval": 5 } ] } }, "id": "node-schedule", "name": "Every 5 Minutes", "type": "n8n-nodes-base.scheduleTrigger", "typeVersion": 1.1, "position": [ 240, 300 ], "notes": "Triggers the workflow every 5 minutes. No Twitter API needed \u2014 we poll our own FastAPI server instead." }, { "parameters": { "url": "http://localhost:8000/clusters", "options": { "timeout": 10000 } }, "id": "node-http", "name": "GET /clusters", "type": "n8n-nodes-base.httpRequest", "typeVersion": 4.1, "position": [ 460, 300 ], "notes": "Fetches the GeoJSON FeatureCollection of all active disaster event clusters from our FastAPI server." }, { "parameters": { "jsCode": "// \u2500\u2500 Node 3: Parse GeoJSON and extract critical/high clusters \u2500\u2500\n// This JavaScript runs inside n8n.\n// 'items' is the response from the HTTP Request node above.\n\nconst geojson = items[0].json;\nconst features = geojson.features || [];\n\n// Filter for CRITICAL and HIGH severity clusters only\nconst alertClusters = features.filter(f => {\n const sev = (f.properties.severity || '').toLowerCase();\n return sev === 'critical' || sev === 'high';\n});\n\nif (alertClusters.length === 0) {\n // Return a flag so the IF node can stop processing\n return [{ json: { has_alerts: false, count: 0, clusters: [] } }];\n}\n\n// Build a summary for each alert cluster\nconst summaries = alertClusters.map(f => ({\n cluster_id: f.properties.cluster_id,\n severity: f.properties.severity,\n tweet_count: f.properties.tweet_count,\n label: f.properties.dominant_label,\n lat: f.geometry.coordinates[1],\n lon: f.geometry.coordinates[0],\n hashtags: (f.properties.top_hashtags || []).join(', '),\n sample_tweet: (f.properties.sample_tweets || [''])[0],\n}));\n\nreturn [{\n json: {\n has_alerts: true,\n count: summaries.length,\n critical_count: alertClusters.filter(f => f.properties.severity === 'critical').length,\n clusters: summaries,\n }\n}];" }, "id": "node-parse", "name": "Parse & Filter Critical Clusters", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ 680, 300 ] }, { "parameters": { "conditions": { "options": { "caseSensitive": false, "leftValue": "", "typeValidation": "strict" }, "conditions": [ { "id": "cond-1", "leftValue": "={{ $json.has_alerts }}", "rightValue": true, "operator": { "type": "boolean", "operation": "true" } } ], "combinator": "and" } }, "id": "node-if", "name": "Any Critical Alerts?", "type": "n8n-nodes-base.if", "typeVersion": 2, "position": [ 900, 300 ], "notes": "Only continues to alert nodes if there are critical/high severity clusters. Prevents spam when no disaster is happening." }, { "parameters": { "assignments": { "assignments": [ { "id": "assign-1", "name": "alert_message", "value": "=\ud83d\udea8 DISASTER ALERT \u2014 {{ $json.count }} active event cluster(s) detected!\n\n\u26a0\ufe0f CRITICAL clusters: {{ $json.critical_count }}\n\nTop event:\n Cluster #{{ $json.clusters[0].cluster_id }}\n Severity: {{ $json.clusters[0].severity.toUpperCase() }}\n Category: {{ $json.clusters[0].label }}\n Tweets: {{ $json.clusters[0].tweet_count }}\n Location: {{ $json.clusters[0].lat }}, {{ $json.clusters[0].lon }}\n Hashtags: {{ $json.clusters[0].hashtags }}\n Sample: {{ $json.clusters[0].sample_tweet }}\n\nGenerated at: {{ $now.toISO() }}\nDashboard: http://localhost:8080\nAPI Docs: http://localhost:8000/docs", "type": "string" }, { "id": "assign-2", "name": "alert_title", "value": "=\ud83d\udea8 Disaster Alert: {{ $json.count }} Active Cluster(s)", "type": "string" }, { "id": "assign-3", "name": "total_clusters", "value": "={{ $json.count }}", "type": "number" } ] }, "options": {} }, "id": "node-format", "name": "Format Alert Message", "type": "n8n-nodes-base.set", "typeVersion": 3.3, "position": [ 1120, 260 ] }, { "parameters": { "method": "POST", "url": "https://webhook.site/YOUR-UNIQUE-ID-HERE", "sendBody": true, "bodyParameters": { "parameters": [ { "name": "title", "value": "={{ $json.alert_title }}" }, { "name": "message", "value": "={{ $json.alert_message }}" }, { "name": "severity", "value": "critical" }, { "name": "source", "value": "disaster_nlp_nit_trichy" }, { "name": "timestamp", "value": "={{ $now.toISO() }}" } ] }, "options": { "timeout": 10000 } }, "id": "node-webhook", "name": "Send to webhook.site", "type": "n8n-nodes-base.httpRequest", "typeVersion": 4.1, "position": [ 1340, 180 ], "notes": "SETUP REQUIRED: Go to https://webhook.site (free, no account), copy your unique URL, paste it above replacing 'YOUR-UNIQUE-ID-HERE'. You will see the alert arrive in real time on that page." }, { "parameters": { "webhookUri": "YOUR_SLACK_WEBHOOK_URL_HERE", "text": "={{ $json.alert_message }}", "otherOptions": { "mrkdwn": true } }, "id": "node-slack", "name": "Slack Notification (optional)", "type": "n8n-nodes-base.slack", "typeVersion": 2.1, "position": [ 1340, 340 ], "disabled": true, "notes": "OPTIONAL: To enable Slack alerts:\n1. Go to https://api.slack.com/apps (free)\n2. Create a new app \u2192 'Incoming Webhooks'\n3. Activate and add to a channel\n4. Copy the webhook URL and paste above\n5. Enable this node (right-click \u2192 Enable)\n\nSlack incoming webhooks are completely free." }, { "parameters": { "jsCode": "// No critical alerts \u2014 log and continue\nconsole.log('No critical/high severity clusters found at', new Date().toISOString());\nreturn [{ json: { status: 'no_alerts', checked_at: new Date().toISOString() } }];" }, "id": "node-no-alert", "name": "Log: No Alerts", "type": "n8n-nodes-base.code", "typeVersion": 2, "position": [ 1120, 380 ], "notes": "When no critical events are found, we just log it. No notification is sent." } ], "connections": { "Every 5 Minutes": { "main": [ [ { "node": "GET /clusters", "type": "main", "index": 0 } ] ] }, "GET /clusters": { "main": [ [ { "node": "Parse & Filter Critical Clusters", "type": "main", "index": 0 } ] ] }, "Parse & Filter Critical Clusters": { "main": [ [ { "node": "Any Critical Alerts?", "type": "main", "index": 0 } ] ] }, "Any Critical Alerts?": { "main": [ [ { "node": "Format Alert Message", "type": "main", "index": 0 } ], [ { "node": "Log: No Alerts", "type": "main", "index": 0 } ] ] }, "Format Alert Message": { "main": [ [ { "node": "Send to webhook.site", "type": "main", "index": 0 }, { "node": "Slack Notification (optional)", "type": "main", "index": 0 } ] ] } }, "settings": { "executionOrder": "v1", "saveManualExecutions": true, "callerPolicy": "workflowsFromSameOwner", "errorWorkflow": "" }, "staticData": null, "tags": [ "disaster-nlp", "nit-trichy", "alert-routing" ], "triggerCount": 0, "updatedAt": "2024-01-15T00:00:00.000Z", "versionId": "1" }