240 lines
6.9 KiB
Markdown
240 lines
6.9 KiB
Markdown
# Notification System Fixes - Implementation Summary
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**Date**: 2026-01-06
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**Status**: ✅ All fixes implemented
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---
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## ✅ **Fix #1: Redis Caching for Leantime User ID**
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### **Problem**:
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- `getLeantimeUserId()` fetched ALL users from Leantime API every time
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- No caching, causing slow performance and inconsistent results
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- Race conditions between different calls
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### **Solution**:
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- Added Redis caching with 1-hour TTL
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- Cache key: `leantime:userid:${email.toLowerCase()}`
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- Checks cache first before making API call
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- Caches result after successful fetch
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### **Implementation**:
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- **File**: `lib/services/notifications/leantime-adapter.ts`
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- **Method**: `getLeantimeUserId()`
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- **Cache TTL**: 3600 seconds (1 hour)
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- **Static helper**: `invalidateUserIdCache()` for manual cache clearing
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### **Benefits**:
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- ✅ Faster performance (no API call if cached)
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- ✅ More reliable (consistent results)
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- ✅ Reduced API load on Leantime
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- ✅ Better error recovery (can use cached value if API fails)
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---
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## ✅ **Fix #2: Retry Logic with Exponential Backoff**
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### **Problem**:
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- `getLeantimeUserId()` failed immediately on API errors
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- No retry mechanism for transient failures
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- Network errors caused permanent failures
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### **Solution**:
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- Added retry logic with up to 3 retries
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- Exponential backoff: 1s, 2s, 4s (max 5s)
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- Retries on:
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- Server errors (5xx)
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- Rate limiting (429)
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- Network errors
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- Certain JSON-RPC errors
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### **Implementation**:
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- **File**: `lib/services/notifications/leantime-adapter.ts`
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- **Method**: `getLeantimeUserId()` with `fetchWithRetry()`
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- **Max Retries**: 3
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- **Backoff**: Exponential (1s → 2s → 4s)
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### **Benefits**:
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- ✅ Handles transient failures gracefully
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- ✅ Better resilience to network issues
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- ✅ Improved success rate for user ID lookup
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---
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## ✅ **Fix #3: Always Invalidate Cache After Marking**
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### **Problem**:
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- Cache only invalidated if marking operation succeeded
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- If `getLeantimeUserId()` failed, cache stayed stale
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- Count remained at old value (65) even after marking attempts
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### **Solution**:
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- Always invalidate cache after marking attempt
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- Even if operation failed or returned `false`
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- Ensures fresh data on next fetch
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### **Implementation**:
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- **File**: `lib/services/notifications/notification-service.ts`
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- **Methods**:
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- `markAsRead()` - Always invalidates cache
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- `markAllAsRead()` - Always invalidates cache
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- **Logic**: Cache invalidation happens regardless of success/failure
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### **Benefits**:
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- ✅ Count always refreshes after marking attempts
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- ✅ User sees accurate data even if operation partially failed
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- ✅ Better UX (no stale count stuck at 65)
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---
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## ✅ **Fix #4: Improved Count Accuracy**
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### **Problem**:
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- Count only based on first 100 notifications
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- If user had >100 notifications, count was inaccurate
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- Used cached notifications which might be stale
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### **Solution**:
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- Fetch up to 1000 notifications directly from API for counting
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- Bypasses cache to get fresh data
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- More accurate count for users with many notifications
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### **Implementation**:
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- **File**: `lib/services/notifications/leantime-adapter.ts`
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- **Method**: `getNotificationCount()`
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- **Change**: Fetches directly from API (up to 1000) instead of using cached `getNotifications()`
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- **Warning**: Logs if count reaches 1000 (might have more)
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### **Benefits**:
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- ✅ More accurate count (up to 1000 notifications)
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- ✅ Fresh data (bypasses cache)
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- ✅ Better handling of users with many notifications
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---
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## ✅ **Fix #5: Better Error Handling and Logging**
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### **Problem**:
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- Errors were logged but not handled gracefully
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- No way to manually clear user ID cache
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- Limited error context in logs
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### **Solution**:
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- Added static method to invalidate user ID cache
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- Improved error messages with more context
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- Better logging throughout the flow
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- Graceful degradation on errors
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### **Implementation**:
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- **File**: `lib/services/notifications/leantime-adapter.ts`
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- **Static Method**: `invalidateUserIdCache(email)`
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- **Improved Logging**: More detailed error messages
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- **Error Recovery**: Continues operation even if caching fails
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### **Benefits**:
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- ✅ Better debugging with detailed logs
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- ✅ Manual cache clearing for troubleshooting
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- ✅ More resilient to partial failures
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---
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## 📊 **Expected Behavior After Fixes**
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### **Before Fixes**:
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1. Mark all as read → `getLeantimeUserId()` fails → Returns `false`
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2. Cache NOT invalidated → Count stays 65 ❌
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3. User sees stale count
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### **After Fixes**:
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1. Mark all as read → `getLeantimeUserId()` checks cache first ✅
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2. If cached: Uses cached ID immediately ✅
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3. If not cached: Fetches with retry logic ✅
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4. Marks notifications as read ✅
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5. **Always invalidates cache** ✅
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6. Count refresh gets fresh data → Shows 0 ✅
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---
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## 🎯 **Key Improvements**
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### **Reliability**:
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- ✅ User ID lookup is now cached and retried
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- ✅ Cache always invalidated after marking
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- ✅ Better error recovery
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### **Performance**:
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- ✅ Faster user ID lookup (cached)
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- ✅ Reduced API calls to Leantime
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- ✅ More efficient cache usage
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### **Accuracy**:
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- ✅ Count based on up to 1000 notifications
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- ✅ Fresh data from API (bypasses stale cache)
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- ✅ Better handling of edge cases
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### **User Experience**:
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- ✅ Count updates correctly after marking
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- ✅ No more stuck count at 65
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- ✅ Faster response times
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---
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## 🚀 **Testing Checklist**
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After rebuild (`rm -rf .next && npm run build && npm start`):
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1. ✅ **Test Mark All As Read**:
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- Should work even if user ID lookup was previously failing
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- Count should update to 0 after marking
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- Cache should be invalidated
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2. ✅ **Test Mark Single As Read**:
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- Should work reliably
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- Count should decrement correctly
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- Cache should be invalidated
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3. ✅ **Test Count Accuracy**:
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- Should show accurate count (up to 1000)
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- Should refresh after marking
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- Should use fresh data from API
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4. ✅ **Test User ID Caching**:
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- First call should fetch from API
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- Subsequent calls should use cache
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- Should be faster on subsequent calls
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5. ✅ **Test Retry Logic**:
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- Should retry on transient failures
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- Should eventually succeed or fail gracefully
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- Should log retry attempts
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---
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## 📝 **Files Modified**
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1. **`lib/services/notifications/leantime-adapter.ts`**:
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- Added Redis caching for user ID
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- Added retry logic with exponential backoff
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- Improved `getNotificationCount()` to fetch directly from API
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- Added `invalidateUserIdCache()` static method
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- Better error handling and logging
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2. **`lib/services/notifications/notification-service.ts`**:
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- Always invalidate cache in `markAsRead()`
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- Always invalidate cache in `markAllAsRead()`
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- Better error handling and logging
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---
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## 🔧 **Configuration**
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- **User ID Cache TTL**: 3600 seconds (1 hour)
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- **Max Retries**: 3 attempts
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- **Retry Backoff**: Exponential (1s, 2s, 4s, max 5s)
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- **Count Fetch Limit**: 1000 notifications
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---
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**Status**: ✅ All fixes implemented and ready for testing
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