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index.php
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<?php
session_start();
require_once 'config.php';
require_once 'auth.php';
if (!isLoggedIn()) {
header("Location: login.php");
exit();
}
$user_id = getCurrentUserId();
// 獲取總庫存和商品數量
$stmt = $conn->prepare("SELECT SUM(stock) as total_stock, COUNT(*) as total_products, SUM(stock * price) as total_value, SUM(stock * (price - purchase_price)) as total_profit FROM products WHERE user_id = ?");
$stmt->bind_param("i", $user_id);
$stmt->execute();
$result = $stmt->get_result()->fetch_assoc();
$total_stock = $result['total_stock'] ?? 0;
$total_products = $result['total_products'] ?? 0;
$total_value = $result['total_value'] ?? 0;
$total_profit = $result['total_profit'] ?? 0;
// 獲取熱賣排名
function getTopSellingProducts($conn, $user_id, $limit = 5) {
$stmt = $conn->prepare("
SELECT p.name, SUM(CASE WHEN io.operation_type = 'out' THEN io.quantity ELSE 0 END) as total_sold
FROM products p
LEFT JOIN inventory_operations io ON p.id = io.product_id
WHERE p.user_id = ?
GROUP BY p.id
ORDER BY total_sold DESC
LIMIT ?
");
$stmt->bind_param("ii", $user_id, $limit);
$stmt->execute();
return $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
}
$top_selling_products = getTopSellingProducts($conn, $user_id);
// 獲取庫存變化、價值和利潤數據（預設為最近30天）
function getInventoryChanges($conn, $days, $user_id) {
$stmt = $conn->prepare("
SELECT
DATE(io.created_at) as date,
SUM(CASE WHEN io.operation_type = 'in' THEN io.quantity ELSE -io.quantity END) as stock_change,
SUM(CASE WHEN io.operation_type = 'in' THEN io.quantity * p.price ELSE -io.quantity * p.price END) as value_change,
SUM(CASE WHEN io.operation_type = 'in' THEN io.quantity * (p.price - p.purchase_price) ELSE -io.quantity * (p.price - p.purchase_price) END) as profit_change
FROM
inventory_operations io
JOIN
products p ON io.product_id = p.id
WHERE
io.created_at >= DATE_SUB(CURDATE(), INTERVAL ? DAY) AND io.user_id = ?
GROUP BY
DATE(io.created_at)
ORDER BY
date
");
$stmt->bind_param("ii", $days, $user_id);
$stmt->execute();
return $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
}
$inventory_changes = getInventoryChanges($conn, 30, $user_id);
?>
<!DOCTYPE html>
<html lang="zh-TW">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>庫存管理系統 - 首頁</title>
<link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
</head>
<body class="bg-gray-100">
<?php include "navbar.php"; ?>
<div class="container mx-auto p-6">
<h1 class="text-3xl font-bold mb-6">庫存管理系統概覽</h1>
<div class="grid grid-cols-1 md:grid-cols-2 gap-6 mb-6">
<div class="bg-white rounded-lg shadow-md p-6">
<h2 class="text-xl font-semibold mb-4">總體統計</h2>
<div class="grid grid-cols-2 gap-4">
<div class="text-center">
<p class="text-gray-600">總庫存數量</p>
<p class="text-3xl font-bold text-blue-600"><?php echo number_format($total_stock); ?></p>
</div>
<div class="text-center">
<p class="text-gray-600">商品數量</p>
<p class="text-3xl font-bold text-green-600"><?php echo number_format($total_products); ?></p>
</div>
<div class="text-center">
<p class="text-gray-600">商品總價值</p>
<p class="text-3xl font-bold text-purple-600">$<?php echo number_format($total_value, 2); ?></p>
</div>
<div class="text-center">
<p class="text-gray-600">總利潤</p>
<p class="text-3xl font-bold text-red-600">$<?php echo number_format($total_profit, 2); ?></p>
</div>
</div>
</div>
<div class="bg-white rounded-lg shadow-md p-6">
<h2 class="text-xl font-semibold mb-4">熱賣商品排名</h2>
<ol class="list-decimal list-inside">
<?php foreach ($top_selling_products as $product): ?>
<li class="mb-2"><?php echo htmlspecialchars($product['name']); ?> (銷量: <?php echo $product['total_sold']; ?>)</li>
<?php endforeach; ?>
</ol>
</div>
</div>
<div class="grid grid-cols-1 md:grid-cols-2 gap-6 mb-6">
<div class="bg-white rounded-lg shadow-md p-6">
<h2 class="text-xl font-semibold mb-4">庫存變化</h2>
<div class="mb-4">
<label for="stockTimeRange" class="block text-sm font-medium text-gray-700">選擇時間範圍：</label>
<select id="stockTimeRange" class="mt-1 block w-full pl-3 pr-10 py-2 text-base border-gray-300 focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm rounded-md">
<option value="7">最近 7 天</option>
<option value="30" selected>最近 30 天</option>
<option value="90">最近 90 天</option>
<option value="365">最近一年</option>
</select>
</div>
<canvas id="stockChart"></canvas>
</div>
<div class="bg-white rounded-lg shadow-md p-6">
<h2 class="text-xl font-semibold mb-4">價值變化</h2>
<div class="mb-4">
<label for="valueTimeRange" class="block text-sm font-medium text-gray-700">選擇時間範圍：</label>
<select id="valueTimeRange" class="mt-1 block w-full pl-3 pr-10 py-2 text-base border-gray-300 focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm rounded-md">
<option value="7">最近 7 天</option>
<option value="30" selected>最近 30 天</option>
<option value="90">最近 90 天</option>
<option value="365">最近一年</option>
</select>
</div>
<canvas id="valueChart"></canvas>
</div>
</div>
<div class="grid grid-cols-1 md:grid-cols-2 gap-6 mb-6">
<div class="bg-white rounded-lg shadow-md p-6">
<h2 class="text-xl font-semibold mb-4">利潤變化</h2>
<div class="mb-4">
<label for="profitTimeRange" class="block text-sm font-medium text-gray-700">選擇時間範圍：</label>
<select id="profitTimeRange" class="mt-1 block w-full pl-3 pr-10 py-2 text-base border-gray-300 focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 sm:text-sm rounded-md">
<option value="7">最近 7 天</option>
<option value="30" selected>最近 30 天</option>
<option value="90">最近 90 天</option>
<option value="365">最近一年</option>
</select>
</div>
<canvas id="profitChart"></canvas>
</div>
</div>
</div>
<script>
const stockCtx = document.getElementById('stockChart').getContext('2d');
const valueCtx = document.getElementById('valueChart').getContext('2d');
const profitCtx = document.getElementById('profitChart').getContext('2d');
let stockChart, valueChart, profitChart;
function createChart(ctx, label, data, color) {
return new Chart(ctx, {
type: 'line',
data: {
labels: data.map(item => item.date),
datasets: [{
label: label,
data: data.map(item => item[label.toLowerCase() + '_change']),
borderColor: color,
tension: 0.1
}]
},
options: {
responsive: true,
scales: {
y: {
beginAtZero: true
}
}
}
});
}
function updateCharts(data) {
if (stockChart) stockChart.destroy();
if (valueChart) valueChart.destroy();
if (profitChart) profitChart.destroy();
stockChart = createChart(stockCtx, 'Stock', data, 'rgb(75, 192, 192)');
valueChart = createChart(valueCtx, 'Value', data, 'rgb(153, 102, 255)');
profitChart = createChart(profitCtx, 'Profit', data, 'rgb(255, 99, 132)');
}
// 初始化圖表
updateCharts(<?php echo json_encode($inventory_changes); ?>);
// 監聽時間範圍選擇的變化
document.getElementById('stockTimeRange').addEventListener('change', updateData);
document.getElementById('valueTimeRange').addEventListener('change', updateData);
document.getElementById('profitTimeRange').addEventListener('change', updateData);
function updateData(e) {
const days = e.target.value;
fetch(`get_inventory_changes.php?days=${days}`)
.then(response => response.json())
.then(data => {
updateCharts(data);
})
.catch(error => console.error('Error:', error));
}
</script>
</body>
</html>