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Filename : submit_category.php
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<?php
include('../db.php');

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $id = isset($_POST['id']) ? $_POST['id'] : ''; // Retrieve the ID from the form, if available
    $category_name = $conn->real_escape_string($_POST['category_name']);
    $category_description = $conn->real_escape_string($_POST['category_description']); // New field
    // Generate the category slug by replacing spaces with hyphens and converting to lowercase
    $category_slug = strtolower(str_replace(' ', '-', $category_name));

    // Define the base directory for images
    $baseDir = "img/categories/";

    // Check if the base directory exists, if not, create it
    if (!is_dir($baseDir)) {
        mkdir($baseDir, 0777, true); // Creates the directory with full permissions if it doesn't exist
    }

    // Handle category image upload
    $category_image = '';
    if (isset($_FILES['category_image']) && $_FILES['category_image']['error'] === UPLOAD_ERR_OK) {
        $fileName = basename($_FILES['category_image']['name']);
        $targetFilePath = $baseDir . time() . "_category_" . $fileName;

        // Move uploaded file to the destination folder
        if (move_uploaded_file($_FILES['category_image']['tmp_name'], $targetFilePath)) {
            $category_image = $targetFilePath;
        } else {
            die("Error uploading category image.");
        }
    }

    // Handle banner image upload
    $banner_image = '';
    if (isset($_FILES['banner_image']) && $_FILES['banner_image']['error'] === UPLOAD_ERR_OK) {
        $fileName = basename($_FILES['banner_image']['name']);
        $targetFilePath = $baseDir . time() . "_banner_" . $fileName;

        // Move uploaded file to the destination folder
        if (move_uploaded_file($_FILES['banner_image']['tmp_name'], $targetFilePath)) {
            $banner_image = $targetFilePath;
        } else {
            die("Error uploading banner image.");
        }
    }

    // If updating and no new images are uploaded, retain the existing images
    if (!empty($id)) {
        
        $sql = "SELECT category_image, banner_image FROM categories WHERE id = ?";
        $stmt = $conn->prepare($sql);
        $stmt->bind_param('i', $id);
        $stmt->execute();
        $result = $stmt->get_result();
        $row = $result->fetch_assoc();

        if (empty($category_image)) $category_image = $row['category_image']; // Keep existing category image
        if (empty($banner_image)) $banner_image = $row['banner_image'];       // Keep existing banner image

        $stmt->close();
    }

    // Insert or Update logic
    if (!empty($id)) {
        // Update the existing category
        $sql = "UPDATE categories SET category_name = ?, category_description = ?, category_slug = ?, category_image = ?, banner_image = ?, status = 1 WHERE id = ?";
        $stmt = $conn->prepare($sql);
        $stmt->bind_param('sssssi', $category_name, $category_description, $category_slug, $category_image, $banner_image, $id);

        if ($stmt->execute()) {
            header("Location: view-category.php");
            exit();
        } else {
            echo "Error: " . $stmt->error;
        }
    } else {
        // Insert a new category
        $sql = "INSERT INTO categories (category_name, category_description, category_slug, category_image, banner_image, status) VALUES (?, ?, ?, ?, ?, 1)";
        $stmt = $conn->prepare($sql);
        $stmt->bind_param('sssss', $category_name, $category_description, $category_slug, $category_image, $banner_image);

        if ($stmt->execute()) {
            echo "Category added successfully!";
            // Optionally redirect to a success page
        } else {
            echo "Error: " . $stmt->error;
        }
    }

    $stmt->close();
    $conn->close();

    // Redirect back to the view page or another success page
    header("Location: view-category.php");
    exit();
}