<?php
namespace Zadex\Dynamic\Tags;

defined('ABSPATH') || exit;

use Zadex\Dynamic\Context;
use Zadex\Dynamic\Tag;

/**
 * The post content through `the_content` (so a Zadex document of that post renders too). A post whose own
 * document prints its content is guarded by a stack: the inner call returns '' instead of recursing forever.
 */
final class PostContent extends Tag
{
    /** @var array<int, true> posts whose content is being rendered right now */
    private static array $stack = [];

    public function name(): string
    {
        return 'post-content';
    }

    public function title(): string
    {
        return __('Post content', 'zadex');
    }

    public function render(array $settings, Context $ctx)
    {
        $post = $ctx->post();
        if (!$post || isset(self::$stack[$ctx->post_id])) {
            return '';
        }
        self::$stack[$ctx->post_id] = true;
        try {
            // Nested the_content (shortcodes, a Zadex document of that post) reads the current post: make it this one.
            $html = (string) \Zadex\Frontend\PostData::with($post, static fn() => apply_filters('the_content', (string) ($post->post_content ?? ''))); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound -- WordPress core filter.
        } finally {
            unset(self::$stack[$ctx->post_id]);
        }
        return $html;
    }
}