redis caching updated optimized loading and data readiness

backend/server.ts

@@ -81,57 +81,36 @@ app.get('/api/jobs', async (c) => {
 // Fast endpoint: returns all jobs in a single cached request
 app.get('/api/jobs-all', async (c) => {
   const cacheKey = 'jobs:all';
-  const ttl = 300; // 5 minutes cache
+  const ttl = 1800; // 30 minutes cache
   
   try {
-    // Try to get from cache first
+    // Always try cache first for instant response
     if (isRedisConnected()) {
       const cached = await getCache(cacheKey);
       if (cached) {
         logLine('logs/server.log', `Cache HIT for ${cacheKey} (${cached.items?.length || 0} jobs)`);
+        
+        // Return cached data immediately, refresh in background if needed
+        setImmediate(async () => {
+          try {
+            await refreshJobsCache(cacheKey, ttl, c.req.header('Authorization') || '');
+          } catch (err) {
+            // Silently fail background refresh
+          }
+        });
+        
         return c.json(cached);
       }
       logLine('logs/server.log', `Cache MISS for ${cacheKey} - fetching all jobs`);
     }
     
-    const authHeader = c.req.header('Authorization') || '';
+    // No cache available, fetch now
-    const allItems: any[] = [];
+    const result = await fetchAllJobsFromPocketBase(c.req.header('Authorization') || '');
-    let page = 1;
-    const perPage = 500; // Large page size
-    
-    // Fetch all pages from PocketBase
-    while (true) {
-      const pbUrl = `https://pocketbase.ccllc.pro/api/collections/pbc_1407612689/records?page=${page}&perPage=${perPage}&sort=-Job_Number`;
-      const response = await fetch(pbUrl, {
-        headers: authHeader ? { Authorization: authHeader } : {}
-      });
-      
-      if (!response.ok) {
-        throw new Error(`PocketBase returned ${response.status}`);
-      }
-      
-      const data = await response.json();
-      const items = data.items || [];
-      
-      if (items.length === 0) break;
-      allItems.push(...items);
-      
-      if (allItems.length >= (data.totalItems || 0)) break;
-      page++;
-    }
-    
-    const result = {
-      page: 1,
-      perPage: allItems.length,
-      totalItems: allItems.length,
-      totalPages: 1,
-      items: allItems
-    };
     
     // Cache the result
     if (isRedisConnected()) {
       await setCache(cacheKey, result, ttl);
-      logLine('logs/server.log', `Cached ${cacheKey} with ${allItems.length} jobs for ${ttl}s`);
+      logLine('logs/server.log', `Cached ${cacheKey} with ${result.items.length} jobs for ${ttl}s`);
     }
     
     return c.json(result);
@@ -142,6 +121,52 @@ app.get('/api/jobs-all', async (c) => {
   }
 });
 
+// Helper function to fetch all jobs from PocketBase
+async function fetchAllJobsFromPocketBase(authHeader: string): Promise<any> {
+  const allItems: any[] = [];
+  let page = 1;
+  const perPage = 500;
+  
+  while (true) {
+    const pbUrl = `https://pocketbase.ccllc.pro/api/collections/pbc_1407612689/records?page=${page}&perPage=${perPage}&sort=-Job_Number`;
+    const response = await fetch(pbUrl, {
+      headers: authHeader ? { Authorization: authHeader } : {}
+    });
+    
+    if (!response.ok) {
+      throw new Error(`PocketBase returned ${response.status}`);
+    }
+    
+    const data = await response.json();
+    const items = data.items || [];
+    
+    if (items.length === 0) break;
+    allItems.push(...items);
+    
+    if (allItems.length >= (data.totalItems || 0)) break;
+    page++;
+  }
+  
+  return {
+    page: 1,
+    perPage: allItems.length,
+    totalItems: allItems.length,
+    totalPages: 1,
+    items: allItems
+  };
+}
+
+// Helper function to refresh jobs cache in background
+async function refreshJobsCache(cacheKey: string, ttl: number, authHeader: string): Promise<void> {
+  try {
+    const result = await fetchAllJobsFromPocketBase(authHeader);
+    await setCache(cacheKey, result, ttl);
+    logLine('logs/server.log', `Background refresh: cached ${cacheKey} with ${result.items.length} jobs`);
+  } catch (err) {
+    logLine('logs/error.log', `Background refresh error: ${(err as Error)?.message || String(err)}`);
+  }
+}
+
 
 // --- Microsoft Graph helpers ---
 const getGraphToken = (c?: any) => {
@@ -448,6 +473,31 @@ const PORT = Number(process.env.PORT || 3004);
 
 logLine('logs/server.log', `Starting frontend server (Redis version) on port ${PORT}`);
 
+// Warm up cache on startup
+(async () => {
+  try {
+    if (isRedisConnected()) {
+      logLine('logs/server.log', 'Warming up jobs cache...');
+      const result = await fetchAllJobsFromPocketBase('');
+      await setCache('jobs:all', result, 1800);
+      logLine('logs/server.log', `✓ Cache warmed with ${result.items.length} jobs`);
+    }
+  } catch (err) {
+    logLine('logs/error.log', `Cache warmup failed: ${(err as Error)?.message || String(err)}`);
+  }
+})();
+
+// Background refresh every 5 minutes to keep cache hot
+setInterval(async () => {
+  try {
+    if (isRedisConnected()) {
+      await refreshJobsCache('jobs:all', 1800, '');
+    }
+  } catch (err) {
+    logLine('logs/error.log', `Periodic refresh error: ${(err as Error)?.message || String(err)}`);
+  }
+}, 5 * 60 * 1000); // Every 5 minutes
+
 // Graceful shutdown logging
 const shutdown = (signal: string) => {
   logLine('logs/server.log', `Shutting down due to ${signal}`);