Initial commit, 90% there

.claude/file-history/138484f6-474d-4740-8791-b8f49f53e200/8b6e28fd575ac432@v2

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+#!/usr/bin/env python3
+import json
+
+with open('/home/mdares/.node-red/flows.json', 'r') as f:
+    flows = json.load(f)
+
+# New Fetch Graph Data function that gets KPI history from global context
+new_fetch_func = '''// Fetch KPI History from global context
+
+if (msg.topic !== 'fetch-graph-data' && msg.action !== 'fetch-graph-data') {
+    return null;
+}
+
+// Get KPI history arrays from global context
+const oeeHist = global.get("realOEE") || [];
+const availHist = global.get("realAvailability") || [];
+const perfHist = global.get("realPerformance") || [];
+const qualHist = global.get("realQuality") || [];
+
+node.warn(`[FETCH GRAPH] Retrieved KPI history: ${oeeHist.length} data points`);
+
+// Filter by range if specified
+const range = msg.payload?.range || '24h';
+let cutoffTime;
+const now = Date.now();
+
+switch(range) {
+    case '1h':
+        cutoffTime = now - (1 * 60 * 60 * 1000);
+        break;
+    case '24h':
+        cutoffTime = now - (24 * 60 * 60 * 1000);
+        break;
+    case '7d':
+        cutoffTime = now - (7 * 24 * 60 * 60 * 1000);
+        break;
+    case '30d':
+        cutoffTime = now - (30 * 24 * 60 * 60 * 1000);
+        break;
+    case '90d':
+        cutoffTime = now - (90 * 24 * 60 * 60 * 1000);
+        break;
+    case 'all':
+        cutoffTime = 0; // Show all data
+        break;
+    default:
+        cutoffTime = now - (24 * 60 * 60 * 1000); // Default to 24h
+}
+
+// Filter arrays by cutoff time
+const filterByTime = (arr) => arr.filter(point => point.timestamp >= cutoffTime);
+
+const filteredOEE = filterByTime(oeeHist);
+const filteredAvail = filterByTime(availHist);
+const filteredPerf = filterByTime(perfHist);
+const filteredQual = filterByTime(qualHist);
+
+node.warn(`[FETCH GRAPH] After ${range} filter: ${filteredOEE.length} points`);
+
+// Send to Format Graph Data
+msg.topic = "kpiHistory";
+msg.payload = {
+    oee: filteredOEE,
+    availability: filteredAvail,
+    performance: filteredPerf,
+    quality: filteredQual
+};
+
+return msg;'''
+
+# Update Fetch Graph Data function
+for node in flows:
+    if node.get('id') == 'fetch_graph_data_node_id':
+        node['func'] = new_fetch_func
+        print("✓ Updated Fetch Graph Data to use KPI history from global context")
+        break
+
+with open('/home/mdares/.node-red/flows.json', 'w') as f:
+    json.dump(flows, f, indent=4)
+
+print("✓ flows.json updated")