qdr.app.woo.plugins/studiou-wc-ord-print-statuses/includes/class-import-manager.php

<?php
// Admin UI + handlers for importing the InPrint and Delivered protocol CSVs.

defined('ABSPATH') || exit;

class Import_Manager {
    public function __construct() {
        add_action('admin_menu', array($this, 'add_import_submenu'));
        add_action('admin_post_import_inprint_protocol',   array($this, 'handle_import_inprint_protocol'));
        add_action('admin_post_import_delivered_protocol', array($this, 'handle_import_delivered_protocol'));
    }

    public function add_import_submenu() {
        $title = __('Import Protocols', 'studiou-wc-ord-print-statuses');
        add_submenu_page(
            'woocommerce',
            $title,
            $title,
            'manage_woocommerce',
            'studiou-import-protocols',
            array($this, 'render_import_page')
        );
    }

    public function render_import_page() {
        ?>
        <div class="wrap">
            <h1><?php echo esc_html(get_admin_page_title()); ?></h1>

            <h2><?php esc_html_e('Import InPrint Protocol', 'studiou-wc-ord-print-statuses'); ?></h2>
            <p>
                <?php
                printf(
                    /* translators: list of required CSV header names. */
                    esc_html__('Required CSV headers: %s', 'studiou-wc-ord-print-statuses'),
                    '<code>order_no</code>, <code>externalorder</code>, <code>externalorderdate</code>'
                );
                ?>
            </p>
            <form method="post" action="<?php echo esc_url(admin_url('admin-post.php')); ?>" enctype="multipart/form-data">
                <input type="hidden" name="action" value="import_inprint_protocol">
                <?php wp_nonce_field('import_inprint_protocol', 'import_inprint_protocol_nonce'); ?>
                <input type="file" name="inprint_csv" accept=".csv,text/csv" required>
                <?php submit_button(__('Import InPrint Protocol', 'studiou-wc-ord-print-statuses')); ?>
            </form>

            <h2><?php esc_html_e('Import Delivered Protocol', 'studiou-wc-ord-print-statuses'); ?></h2>
            <p>
                <?php
                printf(
                    /* translators: list of required CSV header names. */
                    esc_html__('Required CSV headers: %s', 'studiou-wc-ord-print-statuses'),
                    '<code>order_no</code>'
                );
                ?>
            </p>
            <form method="post" action="<?php echo esc_url(admin_url('admin-post.php')); ?>" enctype="multipart/form-data">
                <input type="hidden" name="action" value="import_delivered_protocol">
                <?php wp_nonce_field('import_delivered_protocol', 'import_delivered_protocol_nonce'); ?>
                <input type="file" name="delivered_csv" accept=".csv,text/csv" required>
                <?php submit_button(__('Import Delivered Protocol', 'studiou-wc-ord-print-statuses')); ?>
            </form>
        </div>
        <?php
    }

    /**
     * Map from admin-post action name → [file field, nonce field/action, DB handler callable].
     * Adding a new protocol is a single-entry change here.
     */
    private function protocol_dispatch() {
        return array(
            'import_inprint_protocol' => array(
                'file_field' => 'inprint_csv',
                'nonce'      => 'import_inprint_protocol_nonce',
                'handler'    => array('Studiou_DB_Manager', 'import_inprint_protocol'),
            ),
            'import_delivered_protocol' => array(
                'file_field' => 'delivered_csv',
                'nonce'      => 'import_delivered_protocol_nonce',
                'handler'    => array('Studiou_DB_Manager', 'import_delivered_protocol'),
            ),
        );
    }

    public function handle_import_inprint_protocol() {
        $this->run_import('import_inprint_protocol');
    }

    public function handle_import_delivered_protocol() {
        $this->run_import('import_delivered_protocol');
    }

    /**
     * Common pipeline: capability check → nonce → file validation → parse → dispatch → redirect.
     * Every non-success branch returns immediately via redirect_back() so static
     * analysis can prove that subsequent code is only reached on the happy path.
     */
    private function run_import($action) {
        $dispatch = $this->protocol_dispatch();
        if (!isset($dispatch[$action])) {
            return $this->redirect_back();
        }
        $cfg = $dispatch[$action];

        if (!current_user_can('manage_woocommerce')) {
            wp_die(esc_html__('You do not have sufficient permissions to access this page.', 'studiou-wc-ord-print-statuses'));
        }
        check_admin_referer($action, $cfg['nonce']);

        $file = $this->validated_upload($cfg['file_field']);
        if ($file === null) {
            return $this->redirect_back();
        }

        $csv_data = Studiou_DB_Manager::parse_csv($file['tmp_name']);
        if (empty($csv_data)) {
            UtilsLog::message(
                __('CSV file could not be parsed or contained no data rows.', 'studiou-wc-ord-print-statuses'),
                'error'
            );
            return $this->redirect_back();
        }

        $result = call_user_func($cfg['handler'], $csv_data);
        $this->emit_import_summary($result);
        return $this->redirect_back();
    }

    /**
     * Validate the file upload superglobal entry. Emits a notice and returns null on failure.
     *
     * @return array|null
     */
    private function validated_upload($field) {
        if (!isset($_FILES[$field]) || !is_array($_FILES[$field])) {
            UtilsLog::message(__('No file uploaded.', 'studiou-wc-ord-print-statuses'), 'error');
            return null;
        }
        $file = $_FILES[$field];
        if (isset($file['error']) && $file['error'] !== UPLOAD_ERR_OK) {
            UtilsLog::message(
                sprintf(
                    /* translators: %d is the PHP upload error code. */
                    __('File upload failed (error code %d).', 'studiou-wc-ord-print-statuses'),
                    (int) $file['error']
                ),
                'error'
            );
            return null;
        }
        if (empty($file['tmp_name']) || !is_uploaded_file($file['tmp_name'])) {
            UtilsLog::message(__('Uploaded file is not accessible.', 'studiou-wc-ord-print-statuses'), 'error');
            return null;
        }
        // Defense-in-depth: the HTML `accept` attribute is a client-side hint
        // and can be bypassed. Verify the uploaded file is named *.csv.
        $name = isset($file['name']) ? (string) $file['name'] : '';
        $ext  = strtolower(pathinfo($name, PATHINFO_EXTENSION));
        if ($ext !== 'csv') {
            UtilsLog::message(__('Only .csv files are accepted.', 'studiou-wc-ord-print-statuses'), 'error');
            return null;
        }
        return $file;
    }

    private function emit_import_summary($result) {
        $updated = isset($result['updated_count']) ? (int) $result['updated_count'] : 0;
        $errors  = isset($result['errors']) && is_array($result['errors']) ? $result['errors'] : array();

        UtilsLog::message(
            sprintf(
                _n(
                    '%d order updated successfully.',
                    '%d orders updated successfully.',
                    $updated,
                    'studiou-wc-ord-print-statuses'
                ),
                $updated
            ),
            $updated > 0 ? 'success' : 'info'
        );

        if (!empty($errors)) {
            UtilsLog::message(
                sprintf(
                    /* translators: 1: error count, 2: comma-separated error messages. */
                    __('%1$d errors occurred: %2$s', 'studiou-wc-ord-print-statuses'),
                    count($errors),
                    esc_html(implode(', ', $errors))
                ),
                'error'
            );
        }
    }

    private function redirect_back() {
        wp_safe_redirect(admin_url('admin.php?page=studiou-import-protocols'));
        exit;
    }
}