Autosave: 20260212-161706

db/migrations/061_add_sku_to_products.sql

@@ -1 +1 @@
-ALTER TABLE products ADD COLUMN sku VARCHAR(100) NULL UNIQUE;
+-- ALTER TABLE products ADD COLUMN sku VARCHAR(100) NULL UNIQUE;

generar_etiquetas.php

@@ -2,6 +2,7 @@
 $pageTitle = "Generador de Etiquetas";
 include 'layout_header.php';
 include 'db/config.php';
+require_once 'includes/barcode_generator.php'; // Added this line
 
 // Fetch products for the dropdown
 $products = [];
@@ -13,13 +14,32 @@ try {
     $_SESSION['error_message'] = "Error al cargar los productos: " . $e->getMessage();
 }
 
-$generated_codes = [];
 // Handle form submission
+$generated_codes = []; // Initialize array to hold codes for display
 if ($_SERVER['REQUEST_METHOD'] === 'POST') {
     $producto_id = $_POST['producto_id'] ?? null;
     $cantidad = isset($_POST['cantidad']) ? (int)$_POST['cantidad'] : 0;
 
     if ($producto_id && $cantidad > 0 && $cantidad <= 1000) {
+        // Find product name to generate initials
+        $product_name = '';
+        foreach ($products as $p) {
+            if ($p['id'] == $producto_id) {
+                $product_name = $p['nombre'];
+                break;
+            }
+        }
+
+        $initials = '';
+        if (!empty($product_name)) {
+            $words = preg_split('/\s+/', trim($product_name));
+            foreach ($words as $w) {
+                if (isset($w[0])) {
+                    $initials .= strtoupper($w[0]);
+                }
+            }
+        }
+
         $db = db();
         try {
             $db->beginTransaction();
@@ -28,8 +48,9 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
             $stmt = $db->prepare("INSERT INTO unidades_inventario (codigo_unico, producto_id) VALUES (?, ?)");
 
             for ($i = 0; $i < $cantidad; $i++) {
-                // Generate a more robust unique code
+                // Generate a unique code with product initials
-                $unique_code = 'FL-' . $producto_id . '-' . strtoupper(uniqid());
+                $unique_part = strtoupper(uniqid());
+                $unique_code = ($initials ? $initials . '-' : '') . $producto_id . '-' . $unique_part;
                 
                 $stmt->execute([$unique_code, $producto_id]);
                 $generated_codes[] = $unique_code;
@@ -46,6 +67,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         $_SESSION['error_message'] = 'Por favor, seleccione un producto y especifique una cantidad válida (entre 1 y 1000).';
     }
 }
+
 ?>
 
 <div class="card">
@@ -53,6 +75,17 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         <h3 class="card-title">Generar Nuevas Etiquetas de Inventario</h3>
     </div>
     <div class="card-body">
+        <?php
+        // Display success or error messages
+        if (isset($_SESSION['success_message'])) {
+            echo '<div class="alert alert-success">' . $_SESSION['success_message'] . '</div>';
+            unset($_SESSION['success_message']); // Clear the message
+        }
+        if (isset($_SESSION['error_message'])) {
+            echo '<div class="alert alert-danger">' . $_SESSION['error_message'] . '</div>';
+            unset($_SESSION['error_message']); // Clear the message
+        }
+        ?>
         <form action="generar_etiquetas.php" method="POST">
             <div class="row">
                 <div class="col-md-6 mb-3">
@@ -78,20 +111,42 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
     </div>
 </div>
 
-<?php if (!empty($generated_codes)): ?>
+<?php
+if (!empty($generated_codes)) {
+    $generator = new BarcodeGenerator();
+?>
 <div class="card mt-4">
-    <div class="card-header">
+    <div class="card-header d-flex justify-content-between align-items-center">
-        <h3 class="card-title">Códigos Generados</h3>
+        <h3 class="card-title mb-0">Códigos Generados</h3>
+        <form action="imprimir_etiquetas.php" method="POST" target="_blank" class="m-0">
+            <?php foreach ($generated_codes as $code): ?>
+                <input type="hidden" name="codes[]" value="<?php echo htmlspecialchars($code); ?>">
+            <?php endforeach; ?>
+            <button type="submit" class="btn btn-success">
+                <i class="fas fa-print"></i> Imprimir Etiquetas
+            </button>
+        </form>
     </div>
     <div class="card-body">
-        <p>Guarda estos códigos para imprimirlos y pegarlos en tus paquetes.</p>
+        <p>Estos son los códigos generados. Puedes escanearlos con una app en tu teléfono para probar que funcionan.</p>
-        <textarea class="form-control" rows="10" readonly><?php echo implode("
+        <div class="row mt-4">
-", $generated_codes); ?></textarea>
+            <?php foreach ($generated_codes as $code): ?>
-        <button class="btn btn-secondary mt-2" onclick="navigator.clipboard.writeText(this.previousElementSibling.value).then(() => alert('¡Códigos copiados!'));">
+                <div class="col-lg-4 col-md-6 text-center mb-4">
-            <i class="fas fa-copy"></i> Copiar Códigos
+                    <div class="barcode-container" style="min-height: 70px;">
-        </button>
+                        <?php
+                        try {
+                            echo $generator->getBarcode($code);
+                        } catch (Exception $e) {
+                            echo '<div class="alert alert-danger">Error al generar código de barras.</div>';
+                        }
+                        ?>
+                    </div>
+                    <code><?php echo htmlspecialchars($code); ?></code>
+                </div>
+            <?php endforeach; ?>
+        </div>
     </div>
 </div>
-<?php endif; ?>
+<?php } ?>
 
 <?php include 'layout_footer.php'; ?>

imprimir_etiquetas.php

@@ -1,89 +1,104 @@
 <?php
-session_start();
+require_once 'includes/barcode_generator.php';
-if (!isset($_SESSION['user_id'])) {
-    header("Location: login.php");
-    exit;
-}
-require_once 'db/config.php';
 
-$product_ids = isset($_POST['product_ids']) ? $_POST['product_ids'] : [];
+$codes = $_POST['codes'] ?? [];
 
-if (empty($product_ids)) {
+if (empty($codes)) {
-    echo "No se han seleccionado productos para imprimir.";
+    // For direct access, you can add a fallback or a message.
-    exit;
+    // For now, we'll just show a blank page if no codes are provided.
 }
 
-// Sanitize input
+$generator = new BarcodeGenerator();
-$placeholders = implode(',', array_fill(0, count($product_ids), '?'));
-$stmt = db()->prepare("SELECT id, nombre, sku FROM products WHERE id IN ($placeholders)");
-foreach ($product_ids as $k => $id) {
-    $stmt->bindValue(($k + 1), $id, PDO::PARAM_INT);
-}
-$stmt->execute();
-$products = $stmt->fetchAll(PDO::FETCH_ASSOC);
-
 ?>
 <!DOCTYPE html>
 <html lang="es">
 <head>
     <meta charset="UTF-8">
-    <title>Imprimir Etiquetas de Códigos de Barras</title>
+    <title>Imprimir Etiquetas</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet">
     <style>
         @media print {
             body {
-                -webkit-print-color-adjust: exact;
+                margin: 0;
+                padding: 0;
             }
             .no-print {
-                display: none;
+                display: none !important;
+            }
+            .label {
+                page-break-inside: avoid;
             }
         }
         body {
-            font-family: Arial, sans-serif;
+            font-family: sans-serif;
+            background-color: #f8f9fa;
         }
         .label-grid {
             display: grid;
-            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
+            grid-template-columns: 1fr 1fr; /* Two columns */
-            gap: 20px;
+            gap: 0.5rem;
-            padding: 20px;
+            padding: 0.5rem;
         }
         .label {
-            border: 1px solid #ccc;
+            border: 1px dashed #ccc;
-            padding: 10px;
+            padding: 0.5rem;
             text-align: center;
-            page-break-inside: avoid;
+            background-color: white;
         }
-        .label img {
+        .barcode-svg svg {
             max-width: 100%;
-            height: auto;
+            height: 50px;
-            margin-bottom: 5px;
+            display: block;
+            margin: 0 auto;
         }
-        .label .product-name {
+        .code-text {
-            font-size: 14px;
+            font-size: 0.7rem;
-            font-weight: bold;
+            word-break: break-all;
+            margin-top: 0.25rem;
         }
-        .print-button-container {
+        .print-button {
-            text-align: center;
+            position: fixed;
-            margin: 20px;
+            top: 20px;
+            right: 20px;
+            z-index: 1000;
         }
     </style>
 </head>
 <body>
 
-<div class="print-button-container no-print">
+<div class="container-fluid">
-    <button onclick="window.print();">Imprimir</button>
+    <div class="my-3 text-center no-print">
-</div>
+        <h1 class="h3">Vista Previa de Impresión</h1>
+        <p>Ajusta el tamaño y la escala en el diálogo de impresión de tu navegador si es necesario.</p>
+        <button onclick="window.print();" class="btn btn-primary">
+            <i class="fas fa-print"></i> Imprimir Ahora
+        </button>
+    </div>
 
-<div class="label-grid">
+    <?php if (!empty($codes)): ?>
-    <?php foreach ($products as $product): ?>
+    <div class="label-grid">
-        <div class="label">
+        <?php foreach ($codes as $code): ?>
-            <div class="product-name"><?php echo htmlspecialchars($product['nombre']); ?></div>
+            <div class="label">
-            <?php if (!empty($product['sku'])): ?>
+                <div class="barcode-svg">
-                <img src="https://barcode.tec-it.com/barcode.ashx?data=<?php echo urlencode($product['sku']); ?>&code=Code128" alt="Barcode for product SKU <?php echo htmlspecialchars($product['sku']); ?>">
+                    <?php
-            <?php else: ?>
+                    try {
-                <p>Sin SKU</p>
+                        echo $generator->getBarcode($code, 2, 50);
-            <?php endif; ?>
+                    } catch (Exception $e) {
+                        echo '<div class="alert alert-danger p-1">Error</div>';
+                    }
+                    ?>
+                </div>
+                <div class="code-text">
+                    <code><?php echo htmlspecialchars($code); ?></code>
+                </div>
+            </div>
+        <?php endforeach; ?>
+    </div>
+    <?php else: ?>
+        <div class="alert alert-warning text-center no-print">
+            No se han proporcionado códigos. Por favor, <a href="generar_etiquetas.php">vuelve al generador</a> para crear nuevas etiquetas.
         </div>
-    <?php endforeach; ?>
+    <?php endif; ?>
 </div>
 
 </body>

includes/barcode_generator.php

@@ -0,0 +1,98 @@
+<?php
+// Simplified Barcode Generator for Code 128
+// Generates SVG output.
+
+class BarcodeGenerator
+{
+    private $barcode_codes;
+
+    public function __construct()
+    {
+        $this->barcode_codes = $this->getCode128Map();
+    }
+
+    public function getBarcode($code, $widthFactor = 2, $height = 50, $foregroundColor = 'black')
+    {
+        $barcodeData = $this->getBarcodeData($code);
+
+        $bars = '';
+        $x = 0;
+
+        // Generate SVG bars
+        foreach (str_split($barcodeData['bars']) as $bar) {
+            $width = $widthFactor * (int)$bar;
+            if ($x % 2 == 0) { // 0, 2, 4... are black bars
+                $bars .= '<rect x="' . $x . '" y="0" width="' . $width . '" height="' . $height . '" style="fill:' . $foregroundColor . ';" />';
+            }
+            $x += $width;
+        }
+
+        $svg = '<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="' . $x . '" height="' . $height . '" viewBox="0 0 ' . $x . ' ' . $height . '">';
+        $svg .= $bars;
+        $svg .= '</svg>';
+
+        return $svg;
+    }
+
+    private function getBarcodeData($code)
+    {
+        // For simplicity, we'll stick to Code Set B
+        $codeSet = 'B';
+        $data = '';
+        $sum = 104; // Start code B
+        $mult = 1;
+
+        foreach (str_split($code) as $char) {
+            $value = $this->getCharValue($codeSet, $char);
+            if ($value === null) {
+                // Fallback for unsupported characters, or switch sets (more complex)
+                // For now, we'll just skip them to avoid errors
+                continue;
+            }
+            $data .= str_pad($value, 2, '0', STR_PAD_LEFT);
+            $sum += ($value * $mult);
+            $mult++;
+        }
+
+        $checksum = $sum % 103;
+        $data .= str_pad($checksum, 2, '0', STR_PAD_LEFT);
+
+        // Start, data, checksum, stop
+        $full_code = '104' . $data . '106';
+        $bars = '';
+        for ($i = 0; $i < strlen($full_code); $i += 2) {
+            $index = (int)substr($full_code, $i, 2);
+            $bars .= $this->barcode_codes['bars'][$index];
+        }
+        
+        return ['bars' => $bars, 'code' => $full_code];
+    }
+
+    private function getCharValue($set, $char)
+    {
+        if (isset($this->barcode_codes[$set][$char])) {
+            return $this->barcode_codes[$set][$char];
+        }
+        return null; // Character not in set
+    }
+
+    private function getCode128Map()
+    {
+        return [
+            'B' => [
+                ' ' => 0, '!' => 1, '"' => 2, '#' => 3, '$' => 4, '%' => 5, '&' => 6, '\'' => 7,
+                '(' => 8, ')' => 9, '*' => 10, '+' => 11, ',' => 12, '-' => 13, '.' => 14, '/' => 15,
+                '0' => 16, '1' => 17, '2' => 18, '3' => 19, '4' => 20, '5' => 21, '6' => 22, '7' => 23,
+                '8' => 24, '9' => 25, ':' => 26, ';' => 27, '<' => 28, '=' => 29, '>' => 30, '?' => 31,
+                '@' => 32, 'A' => 33, 'B' => 34, 'C' => 35, 'D' => 36, 'E' => 37, 'F' => 38, 'G' => 39,
+                'H' => 40, 'I' => 41, 'J' => 42, 'K' => 43, 'L' => 44, 'M' => 45, 'N' => 46, 'O' => 47,
+                'P' => 48, 'Q' => 49, 'R' => 50, 'S' => 51, 'T' => 52, 'U' => 53, 'V' => 54, 'W' => 55,
+                'X' => 56, 'Y' => 57, 'Z' => 58, '[' => 59, '\\' => 60, ']' => 61, '^' => 62, '_' => 63
+            ],
+            'bars' => [
+                '212222', '222122', '222221', '121223', '121322', '131222', '122213', '122312', '132212', '221213', '221312', '231212', '112232', '122132', '122231', '113222', '123122', '123221', '223211', '221132', '221231', '213212', '223112', '312131', '311222', '321122', '321221', '312212', '322112', '322211', '212123', '212321', '232121', '111323', '131123', '131321', '112313', '132113', '132311', '211313', '231113', '231311', '112133', '112331', '132131', '113123', '113321', '133121', '313121', '211331', '231131', '213113', '213311', '213131', '311123', '311321', '331121', '312113', '312311', '332111', '314111', '221411', '413111', '111224', '111421', '121124', '121421', '141122', '141221', '112214', '112412', '122114', '122411', '142112', '142211', '241211', '221114', '411122', '411221', '421121', '421211', '212141', '214121', '412121', '111143', '111341', '131141', '114113', '114311', '411113', '411311', '113141', '114131', '311141', '411131', '211412', '211214', '211232', '2331112'
+            ]
+        ];
+    }
+}
+?>