Guard Pay Diagnostic Tool

<?php

/**

 * ============================================================

 * GUARDEDPAY PRO — Phase 1 Diagnostic (TEMPORARY)

 * ============================================================

 * 

 * PURPOSE: Detects child theme status and scans checkout output

 *          for deprecated GuardedPay copy that needs removal.

 * 

 * INSTALL: Add via Code Snippets plugin (WPCode, Code Snippets, etc.)

 *          OR paste into functions.php temporarily.

 * 

 * USAGE:   1. Activate this snippet

 *          2. Visit /checkout while logged in as admin

 *          3. Look for the yellow diagnostic box at top of page

 *          4. Screenshot or copy the results

 *          5. REMOVE THIS SNIPPET after capturing results

 * 

 * SAFE:    Read-only. Changes nothing. Admin-only output.

 * ============================================================

 */

add_action( 'wp_head', 'guardedpay_phase1_diagnostic' );

function guardedpay_phase1_diagnostic() {

    // Only run on checkout, only for admins

    if ( ! is_checkout() || ! current_user_can( 'manage_options' ) ) {

        return;

    }

    $results = [];

    // ── 1. Child Theme Check ──

    $theme        = wp_get_theme();

    $parent_theme = $theme->parent();

    if ( $parent_theme ) {

        $results[] = '✅ CHILD THEME ACTIVE: "' . $theme->get('Name') . '" (parent: "' . $parent_theme->get('Name') . '")';

        $results[] = '   → Safe to edit functions.php in: ' . get_stylesheet_directory();

    } else {

        $results[] = '⚠️  NO CHILD THEME — You are using "' . $theme->get('Name') . '" directly.';

        $results[] = '   → DO NOT edit this theme\'s functions.php (updates will overwrite).';

        $results[] = '   → Use a Code Snippets plugin instead (WPCode or Code Snippets).';

    }

    $results[] = '';

    // ── 2. Scan for Deprecated Strings ──

    $deprecated_strings = [

        'Pay securely with GuardedPay Pro warranty coverage',

        'You will be redirected to complete your payment',

        'Redeem with GuardedPay Pro',

        'I already have a warranty code',

    ];

    $results[] = '── DEPRECATED COPY SCAN ──';

    $results[] = 'Note: Some strings may be injected via JS after page load.';

    $results[] = 'This scan checks PHP-rendered output only.';

    $results[] = 'Check browser DevTools (Ctrl+F) on checkout for JS-injected strings.';

    $results[] = '';

    // ── 3. Check Active Plugins for GuardedPay ──

    $active_plugins = get_option( 'active_plugins', [] );

    $gp_plugins     = array_filter( $active_plugins, function( $p ) {

        return stripos( $p, 'guard' ) !== false 

            || stripos( $p, 'bytenft' ) !== false

            || stripos( $p, 'guardedpay' ) !== false;

    });

    if ( ! empty( $gp_plugins ) ) {

        $results[] = '── GUARDEDPAY / BYTENFT PLUGIN(S) FOUND ──';

        foreach ( $gp_plugins as $plugin ) {

            $results[] = '   → ' . $plugin;

        }

    } else {

        $results[] = '⚠️  No plugin with "guard" or "bytenft" in filename found in active plugins.';

        $results[] = '   Check Plugins → Installed for the exact plugin name.';

    }

    $results[] = '';

    // ── 4. Check for Red Border CSS ──

    $results[] = '── RED BORDER CHECK ──';

    $results[] = 'Search your theme CSS and plugin CSS for:';

    $results[] = '   border-color: red / border: *red* / #ff0000 / #f00 / rgb(255,0,0)';

    $results[] = '   applied to payment method boxes, .wc_payment_method, or GuardedPay containers.';

    $results[] = '   The removal snippet (Phase 1b) will override this with CSS.';

    $results[] = '';

    // ── 5. Checkout Template Override Check ──

    $child_dir       = get_stylesheet_directory();

    $template_paths  = [

        '/woocommerce/checkout/form-checkout.php',

        '/woocommerce/checkout/payment.php',

        '/woocommerce/checkout/payment-method.php',

        '/woocommerce/checkout/form-pay.php',

    ];

    $results[] = '── CHECKOUT TEMPLATE OVERRIDES ──';

    $found_overrides = false;

    foreach ( $template_paths as $tpl ) {

        if ( file_exists( $child_dir . $tpl ) ) {

            $results[] = '   FOUND: ' . $tpl;

            $found_overrides = true;

            // Scan this file for deprecated strings

            $contents = file_get_contents( $child_dir . $tpl );

            foreach ( $deprecated_strings as $str ) {

                if ( stripos( $contents, $str ) !== false ) {

                    $results[] = '      ⛔ CONTAINS DEPRECATED: "' . $str . '"';

                }

            }

        }

    }

    if ( ! $found_overrides ) {

        $results[] = '   None found — checkout uses default WooCommerce templates.';

        $results[] = '   Deprecated strings are likely injected by the GuardedPay/ByteNFT plugin.';

    }

    // ── 6. Scan functions.php for Deprecated Strings ──

    $results[] = '';

    $results[] = '── FUNCTIONS.PHP SCAN ──';

    $functions_file = $child_dir . '/functions.php';

    if ( file_exists( $functions_file ) ) {

        $func_contents = file_get_contents( $functions_file );

        $found_in_func = false;

        foreach ( $deprecated_strings as $str ) {

            if ( stripos( $func_contents, $str ) !== false ) {

                $results[] = '   ⛔ FOUND IN functions.php: "' . $str . '"';

                $found_in_func = true;

            }

        }

        if ( ! $found_in_func ) {

            $results[] = '   Clean — no deprecated strings in functions.php.';

        }

    }

    // ── Output ──

    echo '<div id="gp-diagnostic" style="

        position:fixed; top:0; left:0; right:0; z-index:999999;

        background:#fff8e1; border-bottom:3px solid #f9a825;

        padding:16px 24px; font-family:monospace; font-size:13px;

        line-height:1.6; max-height:50vh; overflow-y:auto;

        box-shadow:0 2px 8px rgba(0,0,0,0.15);

    ">';

    echo '<strong style="font-size:15px;">🔍 GUARDEDPAY PRO — Phase 1 Diagnostic</strong><br>';

    echo '<em>Admin-only. Remove this snippet after review.</em><br><br>';

    echo '<pre style="margin:0;white-space:pre-wrap;">' . esc_html( implode( "\n", $results ) ) . '</pre>';

    echo '<br><button onclick="document.getElementById(\'gp-diagnostic\').style.display=\'none\'" style="

        padding:6px 16px; cursor:pointer; border:1px solid #999; background:#fff; border-radius:3px;

    ">Dismiss</button>';

    echo '</div>';

}