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📄 Viewing: ./../../l7-pro-2-e-learning-2023-Epolleke/php/../php/get_practice_words.php

<?php
header('Content-Type: application/json');
require_once 'config.php';

$source = isset($_GET['source']) ? $_GET['source'] : 'default';
$list_id = isset($_GET['list_id']) ? (int)$_GET['list_id'] : 0;
$category = isset($_GET['category']) ? $_GET['category'] : '';
$difficulty = isset($_GET['difficulty']) ? $_GET['difficulty'] : '';
$limit = isset($_GET['limit']) ? (int)$_GET['limit'] : 10;

try {
    $pdo = getDbConnection();
    
    if ($source === 'list' && $list_id > 0) {
        // Fetch words from custom list
        $sql = "SELECT 
                    lw.list_word_id as word_id,
                    lw.english_word,
                    lw.dutch_translation,
                    lw.difficulty_level,
                    wl.list_name as category_name
                FROM list_words lw
                JOIN word_lists wl ON lw.list_id = wl.list_id
                WHERE lw.list_id = :list_id";
        
        $params = [':list_id' => $list_id];
        
        // Apply difficulty filter if specified
        if (!empty($difficulty)) {
            $sql .= " AND lw.difficulty_level = :difficulty";
            $params[':difficulty'] = $difficulty;
        }
        
        $sql .= " ORDER BY RAND() LIMIT :limit";
        
        $stmt = $pdo->prepare($sql);
        
        // Bind parameters
        foreach ($params as $key => $value) {
            $stmt->bindValue($key, $value);
        }
        $stmt->bindValue(':limit', $limit, PDO::PARAM_INT);
        
        $stmt->execute();
        $words = $stmt->fetchAll(PDO::FETCH_ASSOC);
        
    } else {
        // Fetch words from default words table
        $sql = "SELECT 
                    w.word_id,
                    w.english_word,
                    w.dutch_translation,
                    w.difficulty_level,
                    c.category_name
                FROM words w
                LEFT JOIN categories c ON w.category_id = c.category_id
                WHERE 1=1";
        
        $params = [];
        
        // Apply category filter
        if (!empty($category)) {
            $sql .= " AND w.category_id = :category";
            $params[':category'] = $category;
        }
        
        // Apply difficulty filter
        if (!empty($difficulty)) {
            $sql .= " AND w.difficulty_level = :difficulty";
            $params[':difficulty'] = $difficulty;
        }
        
        $sql .= " ORDER BY RAND() LIMIT :limit";
        
        $stmt = $pdo->prepare($sql);
        
        // Bind parameters
        foreach ($params as $key => $value) {
            $stmt->bindValue($key, $value);
        }
        $stmt->bindValue(':limit', $limit, PDO::PARAM_INT);
        
        $stmt->execute();
        $words = $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
    
    if (empty($words)) {
        echo json_encode([
            'success' => false,
            'error' => 'No words found with the selected filters'
        ]);
        exit();
    }
    
    echo json_encode([
        'success' => true,
        'words' => $words,
        'count' => count($words)
    ]);
    
} catch(PDOException $e) {
    http_response_code(500);
    echo json_encode([
        'success' => false,
        'error' => 'Database error: ' . $e->getMessage()
    ]);
}
?>

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