feat: replace SSE with Grafana-style client polling and rich date presets

backend/index.js

@@ -61,32 +61,6 @@ const verifyToken = (req, res, next) => {
     });
 };
 
-const sseClients = new Set();
-
-// SSE Endpoint for real-time updates
-app.get('/api/stream', (req, res) => {
-    res.setHeader('Content-Type', 'text/event-stream');
-    res.setHeader('Cache-Control', 'no-cache');
-    res.setHeader('Connection', 'keep-alive');
-    res.setHeader('X-Accel-Buffering', 'no'); // Bypass Nginx Proxy Manager buffering
-    res.flushHeaders();
-
-    // Send initial connection event
-    res.write('data: {"connected": true}\n\n');
-
-    // Keep connection alive through Nginx/Cloudflare
-    const keepAlive = setInterval(() => {
-        res.write(':\n\n'); // SSE comment to prevent idle timeout
-    }, 15000);
-
-    sseClients.add(res);
-
-    req.on('close', () => {
-        clearInterval(keepAlive);
-        sseClients.delete(res);
-    });
-});
-
 // Login Endpoint
 app.post('/api/login', (req, res) => {
     const { email, password } = req.body;
@@ -169,12 +143,6 @@ app.post('/api/data', authenticateAPIKey, async (req, res) => {
             }
             
             await client.query('COMMIT');
-            
-            // Broadcast update to all connected SSE clients
-            const broadcastMessage = `data: {"type": "update"}\n\n`;
-            for (const clientRes of sseClients) {
-                clientRes.write(broadcastMessage);
-            }
         } catch (error) {
             await client.query('ROLLBACK');
             console.error("Database insert error:", error);

src/components/DateRangePicker.tsx

@@ -1,93 +1,98 @@
-import React, { useRef } from 'react';
-import { Calendar } from 'lucide-react';
+import React, { useState } from 'react';
+import { Calendar, RefreshCw, ChevronDown } from 'lucide-react';
 import type { DateRange } from '../types';
 
 interface DateRangePickerProps {
   dateRange: DateRange;
   onChange: (range: DateRange) => void;
+  refreshInterval: number;
+  setRefreshInterval: (interval: number) => void;
+  onManualRefresh: () => void;
 }
 
-const DateRangePicker: React.FC<DateRangePickerProps> = ({ dateRange, onChange }) => {
-  const startRef = useRef<HTMLInputElement>(null);
-  const endRef = useRef<HTMLInputElement>(null);
+const PRESETS = [
+  { label: 'Hoje', getRange: () => { const d = new Date(); d.setHours(0,0,0,0); return { start: d, end: new Date() }; } },
+  { label: 'Ontem', getRange: () => { const d = new Date(); d.setDate(d.getDate() - 1); d.setHours(0,0,0,0); const end = new Date(d); end.setHours(23,59,59,999); return { start: d, end }; } },
+  { label: 'Últimos 7 dias', getRange: () => { const end = new Date(); const start = new Date(); start.setDate(start.getDate() - 7); start.setHours(0,0,0,0); return { start, end }; } },
+  { label: 'Últimos 30 dias', getRange: () => { const end = new Date(); const start = new Date(); start.setDate(start.getDate() - 30); start.setHours(0,0,0,0); return { start, end }; } },
+  { label: 'Este Mês', getRange: () => { const end = new Date(); const start = new Date(end.getFullYear(), end.getMonth(), 1); return { start, end }; } },
+  { label: 'Mês Passado', getRange: () => { const d = new Date(); const start = new Date(d.getFullYear(), d.getMonth() - 1, 1); const end = new Date(d.getFullYear(), d.getMonth(), 0, 23, 59, 59, 999); return { start, end }; } },
+  { label: 'Últimos 90 dias', getRange: () => { const end = new Date(); const start = new Date(); start.setDate(start.getDate() - 90); start.setHours(0,0,0,0); return { start, end }; } },
+  { label: 'Este Ano', getRange: () => { const end = new Date(); const start = new Date(end.getFullYear(), 0, 1); return { start, end }; } },
+  { label: 'Todo o Período', getRange: () => { const end = new Date(); const start = new Date(2000, 0, 1); return { start, end }; } },
+];
 
-  const formatDateForInput = (date: Date) => {
-    const year = date.getFullYear();
-    const month = String(date.getMonth() + 1).padStart(2, '0');
-    const day = String(date.getDate()).padStart(2, '0');
-    return `${year}-${month}-${day}`;
-  };
+const REFRESH_OPTIONS = [
+  { label: 'Desligado', value: 0 },
+  { label: '5s', value: 5000 },
+  { label: '10s', value: 10000 },
+  { label: '30s', value: 30000 },
+  { label: '1m', value: 60000 },
+  { label: '5m', value: 300000 },
+];
+
+const DateRangePicker: React.FC<DateRangePickerProps> = ({ dateRange, onChange, refreshInterval, setRefreshInterval, onManualRefresh }) => {
+  const [isPresetOpen, setIsPresetOpen] = useState(false);
 
   const formatShortDate = (date: Date) => {
     return date.toLocaleDateString('pt-BR', { day: '2-digit', month: '2-digit', year: '2-digit' });
   };
 
-  const parseLocalDate = (value: string) => {
-    if (!value) return null;
-    const [year, month, day] = value.split('-');
-    return new Date(parseInt(year), parseInt(month) - 1, parseInt(day));
-  };
-
-  const handleStartChange = (e: React.ChangeEvent<HTMLInputElement>) => {
-    const newStart = parseLocalDate(e.target.value);
-    if (newStart && !isNaN(newStart.getTime())) {
-      onChange({ ...dateRange, start: newStart });
-    }
-  };
-
-  const handleEndChange = (e: React.ChangeEvent<HTMLInputElement>) => {
-    const newEnd = parseLocalDate(e.target.value);
-    if (newEnd && !isNaN(newEnd.getTime())) {
-      newEnd.setHours(23, 59, 59, 999);
-      onChange({ ...dateRange, end: newEnd });
-    }
-  };
-
-  const openPicker = (ref: React.RefObject<HTMLInputElement | null>) => {
-    if (ref.current) {
-      try {
-        if ('showPicker' in HTMLInputElement.prototype) {
-          ref.current.showPicker();
-        } else {
-          ref.current.focus();
-        }
-      } catch (e) {
-        ref.current.focus();
-      }
-    }
-  };
-
   return (
-    <div className="flex items-center gap-2 bg-dark-card border border-dark-border px-3 py-2 rounded-xl shadow-sm hover:border-brand-primary transition-colors">
-      <Calendar size={16} className="text-dark-muted shrink-0" />
-      <div className="flex items-center gap-2 text-sm font-medium text-dark-text">
-        <div 
-          className="relative cursor-pointer hover:text-brand-primary transition-colors"
-          onClick={() => openPicker(startRef)}
+    <div className="flex flex-wrap items-center gap-3">
+      {/* Date Presets Dropdown */}
+      <div className="relative">
+        <button 
+          onClick={() => setIsPresetOpen(!isPresetOpen)}
+          className="flex items-center gap-2 bg-dark-card border border-dark-border px-4 py-2.5 rounded-xl shadow-sm hover:border-brand-primary transition-colors text-sm font-medium text-dark-text"
         >
-          {formatShortDate(dateRange.start)}
-          <input
-            ref={startRef}
-            type="date"
-            value={formatDateForInput(dateRange.start)}
-            onChange={handleStartChange}
-            className="absolute opacity-0 w-0 h-0 overflow-hidden"
-          />
-        </div>
-        <span className="text-dark-muted font-normal text-xs">até</span>
-        <div 
-          className="relative cursor-pointer hover:text-brand-primary transition-colors"
-          onClick={() => openPicker(endRef)}
+          <Calendar size={16} className="text-dark-muted shrink-0" />
+          <span>{formatShortDate(dateRange.start)} - {formatShortDate(dateRange.end)}</span>
+          <ChevronDown size={14} className="text-dark-muted ml-1" />
+        </button>
+
+        {isPresetOpen && (
+          <>
+            <div className="fixed inset-0 z-10" onClick={() => setIsPresetOpen(false)}></div>
+            <div className="absolute right-0 mt-2 w-48 bg-dark-card border border-dark-border rounded-xl shadow-xl z-20 py-2 max-h-64 overflow-y-auto">
+              {PRESETS.map((preset) => (
+                <button
+                  key={preset.label}
+                  onClick={() => {
+                    onChange(preset.getRange());
+                    setIsPresetOpen(false);
+                  }}
+                  className="w-full text-left px-4 py-2 text-sm text-dark-muted hover:text-dark-text hover:bg-dark-input transition-colors"
+                >
+                  {preset.label}
+                </button>
+              ))}
+            </div>
+          </>
+        )}
+      </div>
+
+      {/* Auto Refresh Dropdown */}
+      <div className="flex items-center bg-dark-card border border-dark-border rounded-xl shadow-sm overflow-hidden">
+        <button 
+          onClick={onManualRefresh}
+          className="px-3 py-2.5 text-dark-muted hover:text-brand-primary hover:bg-dark-input transition-colors border-r border-dark-border"
+          title="Atualizar Agora"
         >
-          {formatShortDate(dateRange.end)}
-          <input
-            ref={endRef}
-            type="date"
-            value={formatDateForInput(dateRange.end)}
-            onChange={handleEndChange}
-            className="absolute opacity-0 w-0 h-0 overflow-hidden"
-          />
-        </div>
+          <RefreshCw size={16} />
+        </button>
+        <select
+          value={refreshInterval}
+          onChange={(e) => setRefreshInterval(Number(e.target.value))}
+          className="appearance-none bg-transparent text-sm font-medium text-dark-text pl-3 pr-8 py-2.5 focus:outline-none cursor-pointer relative"
+          style={{ backgroundImage: `url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e")`, backgroundRepeat: 'no-repeat', backgroundPosition: 'right 0.5rem center', backgroundSize: '1em' }}
+        >
+          {REFRESH_OPTIONS.map(opt => (
+            <option key={opt.label} value={opt.value} className="bg-dark-card">
+              Auto: {opt.label}
+            </option>
+          ))}
+        </select>
       </div>
     </div>
   );

src/components/Layout.tsx

@@ -26,39 +26,29 @@ const Layout = () => {
 
   const [ordersData, setOrdersData] = useState<OrderData[]>([]);
   const [isLoading, setIsLoading] = useState(true);
+  const [refreshInterval, setRefreshInterval] = useState<number>(0);
+
+  const loadData = async (showLoading = false) => {
+    if (showLoading) setIsLoading(true);
+    const data = await fetchData();
+    setOrdersData(data);
+    if (showLoading) setIsLoading(false);
+  };
 
   useEffect(() => {
-    const loadInitial = async () => {
-      setIsLoading(true);
-      const data = await fetchData();
-      setOrdersData(data);
-      setIsLoading(false);
-    };
-
-    loadInitial();
-
-    // Set up SSE for real-time updates
-    const API_URL = import.meta.env.VITE_API_URL || '/api';
-    const sse = new EventSource(`${API_URL}/stream`);
-    
-    sse.onmessage = (event) => {
-      try {
-        const data = JSON.parse(event.data);
-        if (data.type === 'update') {
-          fetchData().then(newData => {
-            setOrdersData(newData);
-          });
-        }
-      } catch (e) {
-        console.error("SSE parse error", e);
-      }
-    };
-
-    return () => {
-      sse.close();
-    };
+    loadData(true);
   }, []);
 
+  useEffect(() => {
+    if (refreshInterval === 0) return;
+    
+    const intervalId = setInterval(() => {
+      loadData(false);
+    }, refreshInterval);
+
+    return () => clearInterval(intervalId);
+  }, [refreshInterval]);
+
   useEffect(() => {
     localStorage.setItem('nexstar_date_range', JSON.stringify({
       start: dateRange.start.toISOString(),
@@ -149,7 +139,7 @@ const Layout = () => {
                 <Loader2 className="w-8 h-8 text-brand-primary animate-spin" />
              </div>
           ) : (
-             <Outlet context={{ dateRange, setDateRange, ordersData }} />
+             <Outlet context={{ dateRange, setDateRange, ordersData, refreshInterval, setRefreshInterval, loadData }} />
           )}
         </div>
       </main>

src/pages/Dashboard.tsx

@@ -47,7 +47,14 @@ const CustomTooltip = ({ active, payload, label, isCurrency }: any) => {
 };
 
 const Dashboard = () => {
-  const { dateRange, setDateRange, ordersData } = useOutletContext<{ dateRange: DateRange, setDateRange: (range: DateRange) => void, ordersData: OrderData[] }>();
+  const { dateRange, setDateRange, ordersData, refreshInterval, setRefreshInterval, loadData } = useOutletContext<{ 
+    dateRange: DateRange, 
+    setDateRange: (range: DateRange) => void, 
+    ordersData: OrderData[],
+    refreshInterval: number,
+    setRefreshInterval: (interval: number) => void,
+    loadData: (showLoading?: boolean) => void
+  }>();
 
   const filteredData = useMemo(() => {
     const orders = ordersData;
@@ -112,7 +119,13 @@ const Dashboard = () => {
           <h1 className="text-2xl font-bold mb-2 text-dark-text">Visão Geral</h1>
           <p className="text-dark-muted font-medium">Resumo de vendas e performance dos produtos.</p>
         </div>
-        <DateRangePicker dateRange={dateRange} onChange={setDateRange} />
+        <DateRangePicker 
+          dateRange={dateRange} 
+          onChange={setDateRange} 
+          refreshInterval={refreshInterval}
+          setRefreshInterval={setRefreshInterval}
+          onManualRefresh={() => loadData(true)}
+        />
       </div>
 
       <div className="grid grid-cols-1 md:grid-cols-3 gap-6">

src/pages/ProductDetails.tsx

@@ -20,7 +20,14 @@ const CustomTooltip = ({ active, payload, label }: any) => {
 
 const ProductDetails = () => {
   const { id } = useParams<{ id: string }>();
-  const { dateRange, setDateRange, ordersData } = useOutletContext<{ dateRange: DateRange, setDateRange: (range: DateRange) => void, ordersData: OrderData[] }>();
+  const { dateRange, setDateRange, ordersData, refreshInterval, setRefreshInterval, loadData } = useOutletContext<{ 
+    dateRange: DateRange, 
+    setDateRange: (range: DateRange) => void, 
+    ordersData: OrderData[],
+    refreshInterval: number,
+    setRefreshInterval: (interval: number) => void,
+    loadData: (showLoading?: boolean) => void
+  }>();
 
   const { productInfo, chartData, totalSold, totalRevenue } = useMemo(() => {
     const orders = ordersData.filter(order => order.ID_Produto === id);
@@ -92,8 +99,13 @@ const ProductDetails = () => {
           </div>
         </div>
 
-        <DateRangePicker dateRange={dateRange} onChange={setDateRange} />
-      </div>
+        <DateRangePicker 
+          dateRange={dateRange} 
+          onChange={setDateRange} 
+          refreshInterval={refreshInterval}
+          setRefreshInterval={setRefreshInterval}
+          onManualRefresh={() => loadData(true)}
+        />      </div>
 
       <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
         <div className="bg-dark-card p-6 rounded-2xl border border-dark-border flex items-center justify-between shadow-sm">

src/pages/Products.tsx

@@ -6,7 +6,14 @@ import type { OrderData, DateRange } from '../types';
 import { parseOrderDate } from '../dataService';
 
 const Products = () => {
-  const { dateRange, setDateRange, ordersData } = useOutletContext<{ dateRange: DateRange, setDateRange: (range: DateRange) => void, ordersData: OrderData[] }>();
+  const { dateRange, setDateRange, ordersData, refreshInterval, setRefreshInterval, loadData } = useOutletContext<{ 
+    dateRange: DateRange, 
+    setDateRange: (range: DateRange) => void, 
+    ordersData: OrderData[],
+    refreshInterval: number,
+    setRefreshInterval: (interval: number) => void,
+    loadData: (showLoading?: boolean) => void
+  }>();
   const [searchTerm, setSearchTerm] = useState('');
 
   // Pagination state
@@ -67,7 +74,13 @@ const Products = () => {
         </div>
         
         <div className="flex flex-col sm:flex-row gap-3">
-          <DateRangePicker dateRange={dateRange} onChange={setDateRange} />
+          <DateRangePicker 
+            dateRange={dateRange} 
+            onChange={setDateRange} 
+            refreshInterval={refreshInterval}
+            setRefreshInterval={setRefreshInterval}
+            onManualRefresh={() => loadData(true)}
+          />
           
           <div className="relative">
             <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 text-zinc-400 dark:text-dark-muted w-5 h-5" />