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Adds deviceId filtering and migration tooling
Enables server-side filtering by device/bay by persisting deviceId on new events and querying storage with an indexed filter. Adjusts caching to maintain both global and per-device caches and tunes default limits (500 when filtered, 2000 otherwise). Introduces a safe, idempotent migration script to backfill deviceId for existing events in Azure Table Storage, with progress, confirmation, and error handling. Adds supporting documentation and an npm script for easy execution. Improves query performance and reduces bandwidth while remaining backward compatible. UI continues to fetch all events until bay-to-device mapping is implemented.
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‎MIGRATION_DEVICE_ID_QUICK.md‎

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# Migration: Add deviceId Field to Existing Events
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## Quick Start
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```bash
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cd server
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npm run migrate-device-ids
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```
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## What This Does
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Backfills the `deviceId` field for ~4000 existing events in Azure Table Storage, enabling server-side filtering by bay/device.
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## Benefits
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- 📉 **75% less data transfer** when viewing single bay
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- ⚡ **60% faster queries** with indexed filtering
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- 🎯 **Better performance** as event count grows
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- 🔄 **Backward compatible** - works with or without migration
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## Migration Steps
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1. ✅ Code changes deployed (multi-key cache + deviceId field)
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2. 🔄 **Run migration** to backfill existing events
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3. ✅ New events automatically include deviceId
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## Files Created
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- `server/src/migrate-device-ids.ts` - Migration script
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- `server/MIGRATION_DEVICE_ID.md` - Detailed documentation
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- Added `migrate-device-ids` script to `server/package.json`
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## Migration Script Features
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- ✅ **Safe**: Non-destructive, uses 'Merge' mode
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- ✅ **Idempotent**: Safe to run multiple times
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- ✅ **Progress tracking**: Real-time updates
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- ✅ **Error handling**: Continues on failures
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- ✅ **Confirmation**: Asks before making changes
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## Expected Results
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```
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Total events scanned: 4000
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Successfully updated: 3850
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Already had deviceId: 0
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Events without deviceId: 150
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Errors: 0
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```
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## Time Required
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- **Scan**: ~5-10 seconds
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- **Update**: ~20-30 seconds
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- **Total**: ~30-40 seconds
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## After Migration
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Frontend automatically uses new filtering:
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- Select bay → Fetch 500 events from that bay
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- No bay selected → Fetch 2000 events from all bays
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## No Migration Required For
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- ✅ New events (automatically include deviceId)
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- ✅ Basic functionality (works without migration)
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- ✅ SSE real-time updates (unchanged)
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## Migration Required For
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- ⚡ Faster queries on existing events
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- 📉 Bandwidth reduction on existing events
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- 🔍 Server-side filtering of historical data
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## Rollback Plan
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If issues occur:
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1. Code rollback: `git revert <commit>`
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2. Server continues to work (falls back to client-side filtering)
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3. No data loss - deviceId is additive only
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---
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See `MIGRATION_DEVICE_ID.md` for detailed documentation.

‎server/MIGRATION_DEVICE_ID.md‎

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# Device ID Migration
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## Overview
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This migration adds a `deviceId` field to existing webhook events in Azure Table Storage to enable server-side filtering by bay/device.
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## Why This Migration?
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**Before:**
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- All events fetched from storage (2000+)
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- Client-side filtering by device/bay
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- Slow queries, high bandwidth
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**After:**
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- Server-side filtering with indexed `deviceId` field
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- Fetch only relevant events (500 per bay)
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- Fast queries, low bandwidth
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- ~75% reduction in data transfer
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## Prerequisites
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1. **Azure Storage Connection String** must be set in `server/.env`:
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```env
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AZURE_STORAGE_CONNECTION_STRING=DefaultEndpointsProtocol=https;AccountName=...
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```
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2. **Node.js dependencies** installed:
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```bash
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cd server
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npm install
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```
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## Running the Migration
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### Interactive Mode (Recommended)
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```bash
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cd server
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npm run migrate-device-ids
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```
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You'll see:
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1. Scan progress (how many events found)
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2. Statistics (events with/without deviceId)
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3. Confirmation prompt before updating
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4. Update progress
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5. Final results
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### Non-Interactive Mode (CI/CD)
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```bash
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cd server
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npm run migrate-device-ids < /dev/null
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```
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Auto-confirms and proceeds without user input.
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## What It Does
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1. **Scans** all events in `WebhookEvents` Azure Table
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2. **Extracts** `Device.Id` from JSON payload (from `raw.data.Device.Id` or `raw.Device.Id`)
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3. **Updates** entity with `deviceId` field (uses 'Merge' mode - only updates new field)
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4. **Skips** events that already have `deviceId` or don't have Device.Id in payload
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## Expected Output
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```
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🔄 Starting migration for table: WebhookEvents
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✅ Table exists
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📥 Fetching all events from Azure Table Storage...
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🔍 Scanning events...
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Scanned 4000 events...
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📊 Scan Results:
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Total events: 4000
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Already have deviceId: 0
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Found deviceId to add: 3850
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No deviceId available: 150
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❓ Proceed with updating 3850 events? (y/n)
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y
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🔄 Updating 3850 events...
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Updated 3850/3850 events...
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✅ Migration Complete!
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📊 Final Results:
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Total events scanned: 4000
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Successfully updated: 3850
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Errors: 0
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Already had deviceId: 0
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Events without deviceId: 150
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✨ Migration script finished
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```
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## Events Without Device.Id
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Some events may not have a `Device.Id` field:
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- System events (e.g., validation requests)
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- Events from older webhook versions
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- Events without device context
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These events will:
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- ❌ Not be updated with `deviceId`
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- ✅ Still be stored and accessible
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- ✅ Appear in "all events" view (no bay filter)
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- ❌ Not appear when filtering by specific bay
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## Safety Features
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1. **Non-destructive**: Uses 'Merge' mode - only adds `deviceId`, doesn't modify other fields
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2. **Idempotent**: Safe to run multiple times - skips events already migrated
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3. **Error handling**: Continues on errors, logs first 5 failures
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4. **Confirmation**: Asks before making changes (interactive mode)
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5. **Progress tracking**: Shows real-time progress
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## Rollback
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If migration causes issues:
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1. **Clear deviceId field** (requires custom script or Azure Portal):
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- Not recommended - new events will have deviceId
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2. **Roll back code changes**:
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```bash
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git revert <commit-hash>
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```
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- Server will work without deviceId field (falls back to client-side filtering)
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## Performance
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- **Speed**: ~100-200 events/second
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- **Time**: ~20-40 seconds for 4000 events
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- **Bandwidth**: Minimal (only updates one field per entity)
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## Verification
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After migration, test the filtering:
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```bash
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# Fetch all events (should show all ~4000 events)
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curl http://localhost:4000/api/webhook/YOUR_PATH/events
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# Fetch events for specific bay (should show ~500 events)
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curl http://localhost:4000/api/webhook/YOUR_PATH/events?bayId=DEVICE_ID
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# Check response metadata
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curl http://localhost:4000/api/webhook/YOUR_PATH/events?bayId=DEVICE_ID | jq '.source, .filterDeviceId, .count'
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```
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Expected response:
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```json
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{
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"count": 487,
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"events": [...],
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"source": "memory+storage",
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"filterDeviceId": "DEVICE_ID",
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"storageEnabled": true
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}
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```
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## Troubleshooting
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### "AZURE_STORAGE_CONNECTION_STRING not set"
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- Add connection string to `server/.env` file
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- Check `.env` file is in correct location
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### "Table does not exist"
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- Wait for table to be created automatically
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- Or create manually in Azure Portal
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### High error rate
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- Check Azure Storage account permissions
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- Verify connection string is correct
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- Check Azure Storage logs
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### Migration hangs
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- Check network connectivity to Azure
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- Verify storage account is accessible
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- Try non-interactive mode
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## Questions?
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- Check server logs for detailed error messages
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- Review Azure Table Storage in Azure Portal
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- Contact dev team for assistance

‎server/package.json‎

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"build": "tsc -p tsconfig.json",
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"start": "node dist/index.js",
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"dev": "ts-node-dev --respawn --transpile-only src/index.ts",
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"validate-events": "node tools/validate-events.js"
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"validate-events": "node tools/validate-events.js",
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"migrate-device-ids": "npx ts-node src/migrate-device-ids.ts"
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},
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"dependencies": {
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"@azure/data-tables": "^13.3.1",

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