导入 AKSRT 主题开发源码
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<?php
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/**
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* AKSRT Download State
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*
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* Unified download state resolver for resource pages.
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* Replaces scattered per-template download status checks
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* with a single service that returns a normalized state object.
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*
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* @package AKSRT
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*/
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defined('ABSPATH') || exit;
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class AKSRT_Download_State {
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private static $instance = null;
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/**
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* State constants
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*/
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const STATE_NOT_LOGGED_IN = 'not_logged_in';
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const STATE_NO_PERMISSION = 'no_permission';
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const STATE_INSUFFICIENT_CREDITS = 'insufficient_credits';
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const STATE_OWNED = 'owned';
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const STATE_AVAILABLE = 'available';
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const STATE_PENDING_DELIVERY = 'pending_delivery';
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private function __construct() {}
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public static function get_instance(): self {
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if (null === self::$instance) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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/**
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* Resolve the current user's download state for a given resource post.
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*
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* @param int $post_id Resource post ID.
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* @return array {
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* @type string $state One of the STATE_* constants.
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* @type bool $can_download Whether the user can initiate download.
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* @type string $message Human-readable status message.
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* @type string $action_label Suggested button label.
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* @type string $action_url Suggested button URL (if applicable).
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* @type int $cost Download cost in credits.
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* @type int $balance Current user credit balance.
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* @type string $login_url Login URL (if not logged in).
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* }
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*/
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public function resolve(int $post_id): array {
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$meta = function_exists('aksrt_get_resource_meta') ? aksrt_get_resource_meta($post_id) : [];
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$price = (float) ($meta['price'] ?? 0);
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$downloads = is_array($meta['downloads'] ?? null) ? $meta['downloads'] : [];
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$is_logged_in = is_user_logged_in();
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$user_id = $is_logged_in ? get_current_user_id() : 0;
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$login_url = wp_login_url(get_permalink($post_id));
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// No downloads available
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if (empty($downloads)) {
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return $this->build_result(
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self::STATE_NO_PERMISSION,
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false,
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__('该资源暂未提供下载链接。', 'aksrt'),
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__('暂无下载', 'aksrt'),
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'',
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0, 0, $login_url
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);
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}
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// Not logged in
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if (!$is_logged_in) {
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$requires_login = false;
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if (class_exists('AKSRT_Settings')) {
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$paid = AKSRT_Settings::get_paid_content_settings();
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$requires_login = !empty($paid['download_requires_login']);
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}
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if ($requires_login) {
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return $this->build_result(
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self::STATE_NOT_LOGGED_IN,
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false,
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__('登录后可下载此资源。', 'aksrt'),
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__('登录下载', 'aksrt'),
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$login_url,
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0, 0, $login_url
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);
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}
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}
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// Check gate (credits, permission, etc.)
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$gate = function_exists('aksrt_can_download') ? aksrt_can_download($post_id) : true;
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if (is_wp_error($gate)) {
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$code = $gate->get_error_code();
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$data = (array) $gate->get_error_data();
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$balance = (int) ($data['balance'] ?? 0);
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$cost = function_exists('aksrt_resource_download_cost')
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? aksrt_resource_download_cost($post_id)
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: (int) ceil($price);
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if ($code === 'aksrt_need_login') {
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return $this->build_result(
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self::STATE_NOT_LOGGED_IN,
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false,
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__('登录后可下载此资源。', 'aksrt'),
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__('登录下载', 'aksrt'),
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(string) ($data['login_url'] ?? $login_url),
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$cost, $balance, (string) ($data['login_url'] ?? $login_url)
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);
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}
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if ($code === 'aksrt_credits_insufficient') {
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return $this->build_result(
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self::STATE_INSUFFICIENT_CREDITS,
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false,
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sprintf(
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/* translators: 1: current balance, 2: required cost */
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__('当前余额 %1$d 积分，需要 %2$d 积分。', 'aksrt'),
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$balance,
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$cost
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),
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sprintf(__('付费下载（%d 积分）', 'aksrt'), $cost),
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'',
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$cost, $balance, $login_url
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);
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}
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// Other gate error — treat as no permission
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return $this->build_result(
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self::STATE_NO_PERMISSION,
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false,
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$gate->get_error_message() ?: __('无下载权限。', 'aksrt'),
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__('无权限', 'aksrt'),
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'',
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0, 0, $login_url
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);
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}
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// Check if user already owns/downloads
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$has_downloaded = false;
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if ($is_logged_in) {
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$downloaded = get_user_meta($user_id, '_aksrt_downloaded_resources', true);
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$downloaded = is_array($downloaded) ? $downloaded : [];
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$has_downloaded = in_array($post_id, $downloaded, true);
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}
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$cost = function_exists('aksrt_resource_download_cost')
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? aksrt_resource_download_cost($post_id)
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: (int) ceil($price);
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$balance = 0;
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if ($is_logged_in && class_exists('AKSRT_Credits')) {
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$balance = AKSRT_Credits::balance($user_id);
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}
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if ($has_downloaded) {
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return $this->build_result(
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self::STATE_OWNED,
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true,
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__('已下载，可再次下载。', 'aksrt'),
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__('再次下载', 'aksrt'),
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'',
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$cost, $balance, $login_url
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);
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}
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// Available
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$label = $cost > 0
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? sprintf(__('下载（%d 积分）', 'aksrt'), $cost)
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: __('立即下载', 'aksrt');
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return $this->build_result(
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self::STATE_AVAILABLE,
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true,
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$cost > 0
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? sprintf(__('下载此资源将消耗 %d 积分。', 'aksrt'), $cost)
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: __('此资源可免费下载。', 'aksrt'),
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$label,
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'',
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$cost, $balance, $login_url
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);
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}
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/**
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* Build a normalized result array.
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*/
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private function build_result(
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string $state,
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bool $can_download,
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string $message,
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string $action_label,
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string $action_url,
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int $cost,
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int $balance,
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string $login_url
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): array {
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return [
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'state' => $state,
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'can_download' => $can_download,
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'message' => $message,
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'action_label' => $action_label,
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'action_url' => $action_url,
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'cost' => $cost,
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'balance' => $balance,
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'login_url' => $login_url,
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];
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}
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}
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