wordpress-theme-aksrt/src/WidgetSystem/PostRenderer.php

<?php

namespace AKSRT\WidgetSystem;

defined('ABSPATH') || exit;

/**
 * Shared list/card/mini markup and pagination payloads (reference parity).
 */
final class PostRenderer {
	public static function payload(array $instance, string $slug, int $page = 1, string $segment = ''): array {
		$segment_config = $slug === 'tab_posts' ? PostQuery::segment($instance, $segment) : [];
		$query = PostQuery::build($instance, $page, $segment_config);
		$html = self::items($query, $instance, $slug, $page);
		$max_pages = max(1, (int) $query->max_num_pages);
		$total = (int) $query->found_posts;
		return [
			'html' => $html,
			'paginate_html' => self::pagination($instance, $page, $max_pages),
			'has_more' => $page < $max_pages,
			'page' => $page,
			'max_pages' => $max_pages,
			'total' => $total,
		];
	}

	public static function items(\WP_Query $query, array $instance, string $slug, int $page = 1): string {
		if (!$query->have_posts()) {
			return function_exists('aksrt_widget_ajax_null') ? aksrt_widget_ajax_null() : RendererHelpers::empty_state(__('暂无内容', 'aksrt'));
		}
		$style = (string) ($instance['style'] ?? 'card');
		$mode = in_array($style, ['list', 'card', 'mini'], true) ? $style : 'card';
		$mini_opt = (array) ($instance['mini_opt'] ?? []);
		$config = [
			'type' => $mode === 'card' ? 'card' : 'list',
			'show_number' => in_array('show_number', $mini_opt, true),
			'show_thumb' => in_array('show_thumb', $mini_opt, true),
			'show_meta' => in_array('show_meta', $mini_opt, true),
			'number_offset' => ($page - 1) * max(1, (int) ($instance['count'] ?? 8)),
			'widget_style' => $mode,
		];
		if ($slug === 'oneline_posts') {
			return self::oneline($query, $config, $mode);
		}
		if ($mode === 'mini') {
			return aksrt_render_mini_list($query, array_merge($config, ['class' => 'ajax-item']), false);
		}
		// The .widget-ajaxpager container rendered by the caller is the ajax
		// target, so item markup goes in without the page-level list wrapper.
		return aksrt_render_post_list(array_merge($config, ['skip_wrapper' => true]), $query, false);
	}

	private static function oneline(\WP_Query $query, array $config, string $style): string {
		$items = '';
		while ($query->have_posts()) {
			$query->the_post();
			if ($style === 'mini') {
				$data = aksrt_renderer_collect_post_data($config);
				$items .= $data ? aksrt_renderer_mini($data, array_merge($config, [
					'class'       => 'posts-item',
					'show_thumb'  => true,
					'show_meta'   => true,
					'show_number' => false,
				])) : '';
			} else {
				$items .= aksrt_render_post(array_merge($config, [
					'type'          => $style === 'card' ? 'card' : 'list',
					'is_mult_thumb' => 'disable',
					'is_no_thumb'   => 'disable',
				]));
			}
		}
		wp_reset_postdata();
		return '<div class="widget-main-post mb20 style-' . esc_attr($style) . '"><div class="swiper-container swiper-scroll" data-slideClass="posts-item"><div class="swiper-wrapper">' . $items . '</div><div class="swiper-button-prev"></div><div class="swiper-button-next"></div></div></div>';
	}

	/**
	 * Pagination contract: '' keeps the hidden stub, ajax renders the load
	 * more trigger, number renders numbered page links; all targets carry the
	 * `.widget-ajaxpager` reference attribute. Interactive controls stay clear
	 * of the runtime's legacy `.ajax-next` HTML pipeline — the widget system
	 * owns the REST client in frontend.js.
	 */
	private static function pagination(array $instance, int $page, int $max_pages): string {
		$mode = (string) ($instance['paginate'] ?? '');
		if ($mode === '' || $mode === 'none') {
			return '<div class="ajax-pag hide"><div class="next-page"><a href="#"></a></div></div>';
		}
		if ($max_pages <= 1) {
			return '';
		}
		if ($mode === 'number' || $mode === 'numbered') {
			$links = '';
			$start = max(1, min($page - 2, $max_pages - 4));
			$end = min($max_pages, max($start + 4, $page + 2));
			for ($number = $start; $number <= $end; $number++) {
				if ($number === $page) {
					$links .= '<span class="page-numbers current">' . $number . '</span>';
					continue;
				}
				$links .= '<a class="next-page page-numbers" ajaxpager-target=".widget-ajaxpager" ajax-replace="true" data-widget-page="' . $number . '" role="button" tabindex="0" href="#page-' . $number . '">' . $number . '</a>';
			}
			return '<div class="pagenav ajax-pag" role="navigation" aria-label="' . esc_attr__('文章分页', 'aksrt') . '">' . $links . '</div>';
		}
		return '<div class="text-center theme-pagination ajax-pag"><div no-scroll="true" ajaxpager-target=".widget-ajaxpager" class="next-page"><a role="button" tabindex="0" href="#next" data-next-page="' . (int) ($page + 1) . '">' . esc_html__('加载更多', 'aksrt') . '</a></div></div>';
	}
}