<?php
// 放在 WordPress 根目錄執行
require_once('wp-load.php');

$posts = get_posts([
    'post_type' => 'post',
    'posts_per_page' => -1,
    'post_status' => 'publish'
]);

$data = [];
foreach ($posts as $post) {
    $categories = wp_get_post_categories($post->ID, ['fields' => 'all']);
    $tags = wp_get_post_tags($post->ID);
    $thumbnail = get_post_thumbnail_id($post->ID);
    
    $data[] = [
        'id' => $post->ID,
        'title' => $post->post_title,
        'slug' => $post->post_name,
        'content' => $post->post_content,
        'excerpt' => $post->post_excerpt,
        'status' => $post->post_status,
        'published_at' => $post->post_date,
        'categories' => array_map(fn($cat) => [
            'id' => $cat->term_id,
            'name' => $cat->name,
            'slug' => $cat->slug
        ], $categories),
        'tags' => array_map(fn($tag) => $tag->name, $tags),
        'featured_image' => $thumbnail ? wp_get_attachment_url($thumbnail) : null,
    ];
}

file_put_contents('wp_export.json', json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
echo "Exported " . count($data) . " posts\n";