refactor(db): drop option/data migration from DB migrator

Keep dbDelta table schema only. Remove aksrt_basic_settings dual-write,
layout/cms/resource/order/plate option migrators, and part-1 trait.
Plate CPT activation no longer gated on migration flag.

inc/bootstrap.php

@@ -200,7 +200,6 @@ require_once AKSRT_DIR . '/inc/classes/class-aksrt-email-rollback.php';
 require_once AKSRT_DIR . '/inc/classes/class-aksrt-user-credits-admin.php';
 
 // 加载数据表迁移器（CMS / 积分 / 下载 token）
-require_once AKSRT_DIR . '/inc/classes/db-traits/trait-aksrt-db-migrator-part-1.php';
 require_once AKSRT_DIR . '/inc/classes/db-traits/trait-aksrt-db-migrator-part-2.php';
 require_once AKSRT_DIR . '/inc/classes/db-traits/trait-aksrt-db-migrator-part-3.php';
 require_once AKSRT_DIR . '/inc/classes/class-aksrt-db-migrator.php';

inc/classes/class-aksrt-db-migrator.php

@@ -2,20 +2,12 @@
 /**
  * AKSRT DB Migrator
  *
- * 维护 CMS / 积分 / 下载 token 等运行时所需的数据表。
+ * Maintains runtime tables (credits / download tokens / shop / forum support, etc.).
+ * Schema only via dbDelta — no option/data migration, no legacy option dual-write.
  *
- * 使用 dbDelta 幂等创建，所有表带主题前缀 aksrt_。
- *
- * 表清单（v3.5 新增）：
- *   - {prefix}aksrt_credit_log        积分流水
- *   - {prefix}aksrt_signin_log        每日签到记录
- *   - {prefix}aksrt_invite            邀请关系
- *   - {prefix}aksrt_dl_token          下载短期 token
- *   - {prefix}aksrt_notification      用户通知收件箱
- *
- * 触发方式：
- *   1. switch_theme / after_switch_theme 钩子
- *   2. 检测 option 'aksrt_db_schema_version' 与 AKSRT_DB_SCHEMA_VERSION 不一致
+ * Trigger:
+ *   1. after_switch_theme
+ *   2. admin_init when aksrt_db_schema_version !== SCHEMA_VERSION
  *
  * @package AKSRT
  */
@@ -23,18 +15,22 @@
 defined('ABSPATH') || exit;
 
 class AKSRT_DB_Migrator {
-    use AKSRT_DB_Migrator_Part_1;
     use AKSRT_DB_Migrator_Part_2;
     use AKSRT_DB_Migrator_Part_3;
 
-
-    /** 当前 schema 版本，更改后会触发 dbDelta。 */
+    /** Current schema version; changing it re-runs dbDelta. */
     const SCHEMA_VERSION = '1.13.0';
 
     const OPT_KEY = 'aksrt_db_schema_version';
 
     /**
-     * 初始化钩子。
+     * Historical flag still readable by older code paths.
+     * Plate CPT is now native when registered; prefer post_type_exists().
+     */
+    const OPT_PLATE_CPT_MIGRATED = 'aksrt_plate_cpt_migrated';
+
+    /**
+     * Register hooks.
      */
     public static function init(): void {
         add_action('after_switch_theme', [self::class, 'maybe_migrate']);
@@ -42,345 +38,15 @@ class AKSRT_DB_Migrator {
     }
 
     /**
-     * 若版本不一致则执行迁移。
+     * Run table schema upgrade when version mismatches.
      */
     public static function maybe_migrate(): void {
         $current = get_option(self::OPT_KEY, '');
-        if ($current !== self::SCHEMA_VERSION) {
-            self::run();
-            update_option(self::OPT_KEY, self::SCHEMA_VERSION);
-        }
-
-        // 选项级（option）数据迁移：独立版本号控制，与表结构解耦。
-        self::maybe_migrate_options();
-    }
-
-    const OPT_LAYOUT_MIGRATED = 'aksrt_archive_layout_migrated';
-    const OPT_RESOURCE_MIGRATED = 'aksrt_resource_cpt_migrated';
-    const OPT_CMS_FORMAT_MIGRATED = 'aksrt_cms_format_migrated';
-    const OPT_RESOURCE_PAY_META_CURSOR = 'aksrt_resource_pay_meta_cursor';
-    const OPT_PLATE_CPT_MIGRATED = 'aksrt_plate_cpt_migrated';
-
-    /**
-     * 一次性 option 迁移：
-     * - 旧 aksrt_basic_settings.post_layout / aksrt_settings.default_archive_layout
-     *   → 统一为 aksrt_settings.archive_layout
-     * - 旧 aksrt_resource CPT 文章 → post + _aksrt_is_resource = 1
-     * - v4 形态归一：清理 site_profile / opening_mode / archive_layout 等历史字段
-     *   并删除全部分类的 aksrt_flow term meta
-     */
-    public static function maybe_migrate_options(): void {
-        self::maybe_migrate_layout();
-        self::maybe_migrate_resource_cpt();
-        self::maybe_migrate_cms_format();
-        self::maybe_migrate_resource_pay_meta();
-        self::maybe_migrate_orders_to_repository();
-        self::maybe_migrate_board_taxonomy_to_plate_cpt();
-    }
-
-    private static function maybe_migrate_layout(): void {
-        if (get_option(self::OPT_LAYOUT_MIGRATED)) return;
-
-        $settings = get_option('aksrt_settings', []);
-        if (!is_array($settings)) $settings = [];
-
-        $basic = get_option('aksrt_basic_settings', []);
-        if (!is_array($basic)) $basic = [];
-
-        $allowed = ['card', 'list', 'masonry', 'grid-cms'];
-
-        $existing_archive = $settings['archive_layout'] ?? '';
-        if (!in_array($existing_archive, $allowed, true)) {
-            // 优先取旧 default_archive_layout，其次旧 post_layout
-            $candidate = $settings['default_archive_layout']
-                ?? $basic['post_layout']
-                ?? $settings['post_layout']
-                ?? 'card';
-            if (!in_array($candidate, $allowed, true)) $candidate = 'card';
-            $settings['archive_layout'] = $candidate;
-        }
-
-        unset($settings['default_archive_layout']);
-        unset($settings['post_layout']);
-        update_option('aksrt_settings', $settings);
-
-        if (isset($basic['post_layout'])) {
-            unset($basic['post_layout']);
-            update_option('aksrt_basic_settings', $basic);
-        }
-
-        update_option(self::OPT_LAYOUT_MIGRATED, time());
-    }
-
-    /**
-     * 把历史 aksrt_resource CPT 文章迁移到 post：
-     *   - post_type = aksrt_resource → post
-     *   - _aksrt_is_resource = 1
-     *
-     * 仅在 admin/cron 上下文且有数据时分批执行；幂等。
-     */
-    private static function maybe_migrate_resource_cpt(): void {
-        if (get_option(self::OPT_RESOURCE_MIGRATED)) return;
-        if (!is_admin() && !(defined('DOING_CRON') && DOING_CRON)) return;
-
-        global $wpdb;
-
-        // 仅查 post_type 字段，避免拉全量行
-        $ids = $wpdb->get_col("SELECT ID FROM {$wpdb->posts} WHERE post_type = 'aksrt_resource' LIMIT 500");
-        if (empty($ids)) {
-            // 无历史数据：直接打标记
-            update_option(self::OPT_RESOURCE_MIGRATED, time());
+        if ($current === self::SCHEMA_VERSION) {
             return;
         }
 
-        foreach ($ids as $id) {
-            $id = (int) $id;
-            // 转 post_type
-            $wpdb->update(
-                $wpdb->posts,
-                ['post_type' => 'post'],
-                ['ID' => $id],
-                ['%s'],
-                ['%d']
-            );
-            update_post_meta($id, '_aksrt_is_resource', 1);
-            clean_post_cache($id);
-        }
-
-        // 若一批迁移满 500，留待下次触发；否则收尾
-        if (count($ids) < 500) {
-            update_option(self::OPT_RESOURCE_MIGRATED, time());
-            // 触发重写规则刷新（因为 /resource/{slug} 旧链接需要 301 重定向）
-            delete_option('rewrite_rules');
-        }
+        self::run();
+        update_option(self::OPT_KEY, self::SCHEMA_VERSION);
     }
-
-    /**
-     * v4 形态归一迁移：
-     *   - aksrt_settings 中的 site_profile / opening_mode / archive_layout
-     *     / default_archive_layout / post_layout 全部 unset
-     *   - aksrt_basic_settings 中的 opening_mode / post_layout 全部 unset
-     *   - 全部分类的 aksrt_flow term meta 删除
-     *
-     * 幂等。
-     */
-    private static function maybe_migrate_cms_format(): void {
-        if (get_option(self::OPT_CMS_FORMAT_MIGRATED)) return;
-
-        // 1. aksrt_settings
-        $settings = get_option('aksrt_settings', []);
-        if (is_array($settings)) {
-            $changed = false;
-            foreach (['site_profile', 'opening_mode', 'archive_layout', 'default_archive_layout', 'post_layout'] as $k) {
-                if (array_key_exists($k, $settings)) {
-                    unset($settings[$k]);
-                    $changed = true;
-                }
-            }
-            if ($changed) {
-                update_option('aksrt_settings', $settings);
-            }
-        }
-
-        // 2. aksrt_basic_settings
-        $basic = get_option('aksrt_basic_settings', []);
-        if (is_array($basic)) {
-            $changed = false;
-            foreach (['opening_mode', 'post_layout'] as $k) {
-                if (array_key_exists($k, $basic)) {
-                    unset($basic[$k]);
-                    $changed = true;
-                }
-            }
-            if ($changed) {
-                update_option('aksrt_basic_settings', $basic);
-            }
-        }
-
-        // 3. 删除全部分类的 aksrt_flow term meta
-        global $wpdb;
-        if ($wpdb instanceof wpdb) {
-            $wpdb->delete($wpdb->termmeta, ['meta_key' => 'aksrt_flow'], ['%s']);
-        }
-
-        update_option(self::OPT_CMS_FORMAT_MIGRATED, time());
-    }
-
-    private static function maybe_migrate_resource_pay_meta(): void {
-        if (get_option(AKSRT_Domain_Model::RESOURCE_PAY_META_MIGRATED)) return;
-        if (!is_admin() && !(defined('DOING_CRON') && DOING_CRON)) return;
-
-        global $wpdb;
-
-        $batch_size = 200;
-        $cursor = (int) get_option(self::OPT_RESOURCE_PAY_META_CURSOR, 0);
-        $candidate_keys = [
-            AKSRT_Domain_Model::PAY_META_KEY,
-            AKSRT_Domain_Model::PAY_TYPE_KEY,
-            AKSRT_Domain_Model::PAY_PRICE_KEY,
-            AKSRT_Domain_Model::RESOURCE_MARKER_KEY,
-            '_aksrt_res_pay_type',
-            '_aksrt_res_price',
-            '_aksrt_res_original_price',
-            '_aksrt_res_vip1_price',
-            '_aksrt_res_vip2_price',
-            '_aksrt_res_version',
-            '_aksrt_res_size',
-            '_aksrt_res_license',
-            '_aksrt_res_compat',
-            '_aksrt_res_demo_url',
-            '_aksrt_res_downloads',
-            '_aksrt_res_require_login',
-            '_aksrt_res_require_captcha',
-            'download_count',
-        ];
-
-        $placeholders = implode(', ', array_fill(0, count($candidate_keys), '%s'));
-        $sql = "SELECT DISTINCT pm.post_id
-                FROM {$wpdb->postmeta} pm
-                INNER JOIN {$wpdb->posts} p ON p.ID = pm.post_id
-                WHERE p.post_type IN ('post', 'aksrt_resource')
-                  AND pm.meta_key IN ({$placeholders})
-                  AND pm.post_id > %d
-                ORDER BY pm.post_id ASC
-                LIMIT %d";
-
-        $params = array_merge($candidate_keys, [$cursor, $batch_size]);
-        $ids = $wpdb->get_col($wpdb->prepare($sql, $params));
-
-        if (empty($ids)) {
-            delete_option(self::OPT_RESOURCE_PAY_META_CURSOR);
-            update_option(AKSRT_Domain_Model::RESOURCE_PAY_META_MIGRATED, time());
-            return;
-        }
-
-        foreach ($ids as $post_id) {
-            self::migrate_resource_pay_meta_post((int) $post_id);
-        }
-
-        update_option(self::OPT_RESOURCE_PAY_META_CURSOR, max(array_map('intval', $ids)));
-
-        if (count($ids) < $batch_size) {
-            delete_option(self::OPT_RESOURCE_PAY_META_CURSOR);
-            update_option(AKSRT_Domain_Model::RESOURCE_PAY_META_MIGRATED, time());
-        }
-    }
-
-    private static function maybe_migrate_orders_to_repository(): void {
-        if (get_option(AKSRT_Domain_Model::ORDER_MIGRATED_OPTION)) return;
-        if (!class_exists('AKSRT_Order_Repository')) return;
-
-        AKSRT_Order_Repository::get_instance()->migrate_from_option();
-        update_option(AKSRT_Domain_Model::ORDER_MIGRATED_OPTION, time());
-    }
-
-    /**
-     * §7.0 板块 taxonomy → plate CPT 一次性迁移。
-     *
-     * 将 aksrt_forum_board taxonomy terms 转为 aksrt_forum_plate CPT posts，
-     * 保留 term meta → post meta 映射、层级关系、版主数据。
-     * 同时在每个帖子上写入 _aksrt_plate_id 指向新 plate post。
-     * 旧 taxonomy 数据保留不删（向后兼容）。
-     */
-    private static function maybe_migrate_board_taxonomy_to_plate_cpt(): void {
-        if (get_option(self::OPT_PLATE_CPT_MIGRATED)) return;
-        if (!is_admin() && !(defined('DOING_CRON') && DOING_CRON)) return;
-        if (!post_type_exists('aksrt_forum_plate')) return;
-
-        $terms = get_terms([
-            'taxonomy'   => 'aksrt_forum_board',
-            'hide_empty' => false,
-            'orderby'    => 'meta_value_num',
-            'meta_key'   => '_aksrt_sort_order',
-            'order'      => 'ASC',
-        ]);
-
-        if (is_wp_error($terms) || empty($terms)) {
-            update_option(self::OPT_PLATE_CPT_MIGRATED, time());
-            return;
-        }
-
-        $term_to_plate = [];
-
-        foreach ($terms as $term) {
-            $existing = get_posts([
-                'post_type'   => 'aksrt_forum_plate',
-                'meta_key'    => '_aksrt_migrated_from_term',
-                'meta_value'  => (string) $term->term_id,
-                'numberposts' => 1,
-                'post_status' => 'any',
-                'fields'      => 'ids',
-            ]);
-
-            if (!empty($existing)) {
-                $term_to_plate[$term->term_id] = (int) $existing[0];
-                continue;
-            }
-
-            $plate_id = wp_insert_post([
-                'post_type'    => 'aksrt_forum_plate',
-                'post_title'   => $term->name,
-                'post_content' => $term->description ?: '',
-                'post_excerpt' => wp_trim_words($term->description ?: '', 30, ''),
-                'post_status'  => 'publish',
-                'post_parent'  => 0,
-                'menu_order'   => (int) get_term_meta($term->term_id, '_aksrt_sort_order', true),
-            ], true);
-
-            if (is_wp_error($plate_id)) {
-                continue;
-            }
-
-            $term_to_plate[$term->term_id] = $plate_id;
-
-            update_post_meta($plate_id, '_aksrt_migrated_from_term', $term->term_id);
-            update_post_meta($plate_id, '_aksrt_sort_order', (int) get_term_meta($term->term_id, '_aksrt_sort_order', true));
-            update_post_meta($plate_id, '_aksrt_icon', (string) get_term_meta($term->term_id, '_aksrt_icon', true));
-
-            $moderators = get_term_meta($term->term_id, '_aksrt_moderators', true);
-            if (is_array($moderators) && !empty($moderators)) {
-                update_post_meta($plate_id, '_aksrt_moderators', $moderators);
-            }
-
-            $roles = get_term_meta($term->term_id, '_aksrt_moderator_roles', true);
-            if (is_array($roles) && !empty($roles)) {
-                update_post_meta($plate_id, '_aksrt_moderator_roles', $roles);
-            }
-
-            $topic_count = (int) get_term_meta($term->term_id, '_aksrt_topic_count', true);
-            if ($topic_count <= 0) {
-                $topic_count = (int) $term->count;
-            }
-            update_post_meta($plate_id, '_aksrt_posts_count', $topic_count);
-        }
-
-        // Resolve parent hierarchy
-        foreach ($terms as $term) {
-            if ($term->parent > 0 && isset($term_to_plate[$term->term_id], $term_to_plate[$term->parent])) {
-                wp_update_post([
-                    'ID'          => $term_to_plate[$term->term_id],
-                    'post_parent' => $term_to_plate[$term->parent],
-                ]);
-            }
-        }
-
-        // Assign _aksrt_plate_id on existing topics
-        global $wpdb;
-        foreach ($term_to_plate as $term_id => $plate_id) {
-            $topic_ids = $wpdb->get_col($wpdb->prepare(
-                "SELECT tr.object_id FROM {$wpdb->term_relationships} tr
-                 INNER JOIN {$wpdb->term_taxonomy} tt ON tt.term_taxonomy_id = tr.term_taxonomy_id
-                 WHERE tt.term_id = %d AND tt.taxonomy = 'aksrt_forum_board'",
-                $term_id
-            ));
-
-            foreach ($topic_ids as $topic_id) {
-                update_post_meta((int) $topic_id, '_aksrt_plate_id', $plate_id);
-            }
-        }
-
-        delete_option('rewrite_rules');
-        update_option(self::OPT_PLATE_CPT_MIGRATED, time());
-    }
-
 }

inc/classes/class-aksrt-forum.php

@@ -132,8 +132,8 @@ class AKSRT_Forum {
     }
 
     public function is_plate_cpt_active(): bool {
-        return post_type_exists('aksrt_forum_plate')
-            && (bool) get_option(AKSRT_DB_Migrator::OPT_PLATE_CPT_MIGRATED);
+        // Plate CPT is the native board model; no option migration gate.
+        return post_type_exists('aksrt_forum_plate');
     }
 
     public function get_config(): array {

inc/classes/db-traits/trait-aksrt-db-migrator-part-1.php

@@ -1,198 +0,0 @@
-<?php
-defined('ABSPATH') || exit;
-
-trait AKSRT_DB_Migrator_Part_1 {
-
-    private static function migrate_resource_pay_meta_post(int $post_id): void {
-        $post = get_post($post_id);
-        if (!($post instanceof WP_Post)) {
-            return;
-        }
-
-        $all_meta = get_post_meta($post_id);
-        if (!is_array($all_meta)) {
-            $all_meta = [];
-        }
-
-        $canonical_meta = self::meta_value($all_meta, AKSRT_Domain_Model::PAY_META_KEY);
-        if (!is_array($canonical_meta)) {
-            $canonical_meta = [];
-        }
-
-        $legacy_downloads = self::meta_value($all_meta, '_aksrt_res_downloads');
-        if (!is_array($legacy_downloads)) {
-            $legacy_downloads = [];
-        }
-
-        $raw_pay_type = self::first_non_empty_string([
-            $canonical_meta['pay_type'] ?? '',
-            self::meta_value($all_meta, AKSRT_Domain_Model::PAY_TYPE_KEY),
-            self::meta_value($all_meta, '_aksrt_res_pay_type'),
-        ]);
-
-        $has_resource_marker = self::first_boolean([
-            self::meta_value($all_meta, AKSRT_Domain_Model::RESOURCE_MARKER_KEY),
-            $post->post_type === 'aksrt_resource',
-            !empty($legacy_downloads),
-        ]);
-
-        if ($raw_pay_type === '' && $has_resource_marker) {
-            $raw_pay_type = AKSRT_Domain_Model::PAY_TYPE_DOWNLOAD;
-        }
-
-        $pay_meta = AKSRT_Domain_Model::sanitize_pay_meta([
-            'pay_type'        => $raw_pay_type,
-            'price'           => self::first_numeric([
-                $canonical_meta['price'] ?? null,
-                self::meta_value($all_meta, AKSRT_Domain_Model::PAY_PRICE_KEY),
-                self::meta_value($all_meta, '_aksrt_res_price'),
-            ]),
-            'original_price'  => self::first_numeric([
-                $canonical_meta['original_price'] ?? null,
-                self::meta_value($all_meta, '_aksrt_res_original_price'),
-            ]),
-            'vip1_price'      => self::first_numeric([
-                $canonical_meta['vip1_price'] ?? null,
-                self::meta_value($all_meta, '_aksrt_res_vip1_price'),
-            ]),
-            'vip2_price'      => self::first_numeric([
-                $canonical_meta['vip2_price'] ?? null,
-                self::meta_value($all_meta, '_aksrt_res_vip2_price'),
-            ]),
-            'version'         => self::first_non_empty_string([
-                $canonical_meta['version'] ?? '',
-                self::meta_value($all_meta, '_aksrt_res_version'),
-            ]),
-            'size'            => self::first_non_empty_string([
-                $canonical_meta['size'] ?? '',
-                self::meta_value($all_meta, '_aksrt_res_size'),
-            ]),
-            'license'         => self::first_non_empty_string([
-                $canonical_meta['license'] ?? '',
-                self::meta_value($all_meta, '_aksrt_res_license'),
-            ]),
-            'compat'          => self::first_non_empty_string([
-                $canonical_meta['compat'] ?? '',
-                self::meta_value($all_meta, '_aksrt_res_compat'),
-            ]),
-            'demo_url'        => self::first_non_empty_string([
-                $canonical_meta['demo_url'] ?? '',
-                self::meta_value($all_meta, '_aksrt_res_demo_url'),
-            ]),
-            'video_url'       => self::first_non_empty_string([
-                $canonical_meta['video_url'] ?? '',
-            ]),
-            'downloads'       => self::first_array([
-                $canonical_meta['downloads'] ?? [],
-                $legacy_downloads,
-            ]),
-            'attributes'      => self::first_array([
-                $canonical_meta['attributes'] ?? [],
-            ]),
-            'gallery'         => self::first_array([
-                $canonical_meta['gallery'] ?? [],
-            ]),
-            'require_login'   => self::first_boolean([
-                $canonical_meta['require_login'] ?? null,
-                self::meta_value($all_meta, '_aksrt_res_require_login'),
-            ]),
-            'require_captcha' => self::first_boolean([
-                $canonical_meta['require_captcha'] ?? null,
-                self::meta_value($all_meta, '_aksrt_res_require_captcha'),
-            ]),
-        ]);
-
-        if ($pay_meta['pay_type'] === AKSRT_Domain_Model::PAY_TYPE_NO && $has_resource_marker) {
-            $pay_meta['pay_type'] = AKSRT_Domain_Model::PAY_TYPE_DOWNLOAD;
-        }
-
-        $pay_meta = AKSRT_Domain_Model::sanitize_pay_meta($pay_meta);
-
-        update_post_meta($post_id, AKSRT_Domain_Model::PAY_META_KEY, $pay_meta);
-        update_post_meta($post_id, AKSRT_Domain_Model::PAY_TYPE_KEY, (string) $pay_meta['pay_type']);
-        update_post_meta($post_id, AKSRT_Domain_Model::PAY_PRICE_KEY, (float) $pay_meta['price']);
-        update_post_meta(
-            $post_id,
-            AKSRT_Domain_Model::RESOURCE_MARKER_KEY,
-            AKSRT_Domain_Model::is_resource_pay_type((string) $pay_meta['pay_type']) ? 1 : 0
-        );
-
-        clean_post_cache($post_id);
-    }
-
-    /**
-     * @param array<string, array<int, mixed>> $all_meta
-     * @return mixed
-     */
-    private static function meta_value(array $all_meta, string $key) {
-        if (!isset($all_meta[$key][0])) {
-            return null;
-        }
-
-        return maybe_unserialize($all_meta[$key][0]);
-    }
-
-    /**
-     * @param array<int, mixed> $candidates
-     */
-    private static function first_non_empty_string(array $candidates): string {
-        foreach ($candidates as $candidate) {
-            if (is_array($candidate)) {
-                continue;
-            }
-
-            $value = trim((string) $candidate);
-            if ($value !== '') {
-                return $value;
-            }
-        }
-
-        return '';
-    }
-
-    /**
-     * @param array<int, mixed> $candidates
-     */
-    private static function first_numeric(array $candidates): float {
-        foreach ($candidates as $candidate) {
-            if ($candidate === null || $candidate === '') {
-                continue;
-            }
-
-            if (is_numeric($candidate)) {
-                return (float) $candidate;
-            }
-        }
-
-        return 0.0;
-    }
-
-    /**
-     * @param array<int, mixed> $candidates
-     */
-    private static function first_boolean(array $candidates): bool {
-        foreach ($candidates as $candidate) {
-            if ($candidate === null || $candidate === '') {
-                continue;
-            }
-
-            return !empty($candidate);
-        }
-
-        return false;
-    }
-
-    /**
-     * @param array<int, mixed> $candidates
-     * @return array<int|string, mixed>
-     */
-    private static function first_array(array $candidates): array {
-        foreach ($candidates as $candidate) {
-            if (is_array($candidate) && !empty($candidate)) {
-                return $candidate;
-            }
-        }
-
-        return [];
-    }
-}