<?php
/**
 * Plugin Name: Asterion — Migrate Bricks links from type:'internal'+url to type:'external'+url
 * Description: /?av_fix_link_types=1
 *   Bricks's set_link_attributes() in base.php expects 'internal' to come with a numeric
 *   'postId' (it ignores 'url' when type='internal'), while 'external' uses the 'url'
 *   string verbatim. Older session-3 templates were built with the wrong shape and lost
 *   their href at render time. This one-shot scans _bricks_page_content_2,
 *   _bricks_page_header_2, _bricks_page_footer_2 across all posts (pages + bricks_template),
 *   rewrites every link block where type==='internal' && isset(url), and writes back.
 *
 * Idempotent : already-correct links are skipped. Safe to re-run.
 */
defined('ABSPATH') || exit;

add_action('init', function () {
    if (empty($_GET['av_fix_link_types'])) return;
    if (! in_array($_SERVER['SERVER_NAME'] ?? '', ['localhost', '127.0.0.1'], true)) wp_die('localhost only');

    global $wpdb;
    header('Content-Type: text/plain; charset=utf-8');

    $keys = ['_bricks_page_content_2', '_bricks_page_header_2', '_bricks_page_footer_2'];

    $rows = $wpdb->get_results(
        "SELECT meta_id, post_id, meta_key, meta_value
         FROM {$wpdb->postmeta}
         WHERE meta_key IN ('" . implode("','", $keys) . "')"
    );

    $patched = 0;
    $touched_posts = 0;
    foreach ($rows as $row) {
        $val = $row->meta_value;
        if (! is_string($val) || $val === '') continue;

        $is_json = ($val[0] === '[');
        $elements = null;

        if ($is_json) {
            $elements = json_decode($val, true);
        } else {
            // Mirror keys (_bricks_page_header_2, _bricks_page_footer_2) are stored as
            // PHP-serialized arrays by av-bricks-rest-bridge → maybe_unserialize.
            $maybe = @unserialize($val);
            if (is_array($maybe)) $elements = $maybe;
        }
        if (! is_array($elements)) continue;

        $count = 0;
        av_walk_fix_links($elements, $count);
        if ($count === 0) continue;

        // Write back in same format as it was stored
        $new = $is_json ? wp_json_encode($elements) : maybe_serialize($elements);
        $wpdb->update($wpdb->postmeta, ['meta_value' => $new], ['meta_id' => $row->meta_id], ['%s'], ['%d']);
        wp_cache_delete($row->post_id, 'post_meta');
        $patched += $count;
        $touched_posts++;
        $fmt = $is_json ? 'json' : 'serialized';
        echo "post #{$row->post_id} ({$row->meta_key}, $fmt) : $count link(s) patched\n";
    }

    echo "\nTotal : $patched links across $touched_posts post(s) patched (type internal\u{2192}external).\n";
    exit;
});

function av_walk_fix_links(&$elements, &$count) {
    $walk = function (&$node) use (&$walk, &$count) {
        if (! is_array($node)) return;
        // Link block shape : has type and url, type wrongly set to 'internal' with a non-numeric url
        if (isset($node['type']) && $node['type'] === 'internal' && isset($node['url']) && is_string($node['url']) && $node['url'] !== '') {
            $node['type'] = 'external';
            $count++;
        }
        foreach ($node as &$value) {
            if (is_array($value)) $walk($value);
        }
    };
    foreach ($elements as &$el) $walk($el);
}