Blueskyの個別ポストURLから埋め込みコードを生成する

ID='Blueskyのアカウント'
API='アプリパスワード'

//phpdotenv
require __DIR__. '/vendor/autoload.php';
use Dotenv\Dotenv;
$dotenv = Dotenv::createImmutable(__DIR__);
$dotenv->load();

/**
 * BlueskyアカウントのDIDを取得
 */
function BlueskyDid($bsky_handle) {
  $query_url = "https://bsky.social/xrpc/com.atproto.identity.resolveHandle?handle={$bsky_handle}";
  $ch = curl_init($query_url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
  curl_setopt($ch, CURLOPT_TIMEOUT, 5);
  curl_setopt($ch, CURLOPT_FAILONERROR, true);

  $result = curl_exec($ch);
  curl_close($ch);

  return $result;
}

/**
 * アクセストークンの取得
 */
function getBlueskyAccessToken($identifier, $password) {
  $login_url = 'https://bsky.social/xrpc/com.atproto.server.createSession';
  $data = [
    'identifier' => $identifier,
    'password' => $password
  ];

  $ch = curl_init($login_url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_POST, true);
  curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
  curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
  curl_setopt($ch, CURLOPT_TIMEOUT, 5);
  curl_setopt($ch, CURLOPT_FAILONERROR, true);
  $response = curl_exec($ch);
  curl_close($ch);

  $session = json_decode($response, true);
  return $session['accessJwt'] ?? null;
}

/**
 * postを取得
 */
function getBlueskyPost($token, $post_url) {
  $ch = curl_init($post_url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, ["Authorization: Bearer {$token}"]);
  curl_setopt($ch, CURLOPT_TIMEOUT, 5);
  curl_setopt($ch, CURLOPT_FAILONERROR, true);

  $result = curl_exec($ch);
  curl_close($ch);

  return $result;
}

/**
 * 埋め込み生成
 */
$url = 'https://bsky.app/profile/bsky.app/post/3l6oveex3ii2l';
preg_match('/https:\/\/bsky\.app\/profile\/(.+)\/post\/(.+)/', $url, $match);

$account = BlueskyDid($match[1]);
$account_data = json_decode($account, true) ?: [];

$api_url = "https://bsky.social/xrpc/app.bsky.feed.getPosts?uris=at://{$account_data['did']}/app.bsky.feed.post/{$match[2]}";
$token = getBlueskyAccessToken($_ENV['ID'], $_ENV['API']);
$post = getBlueskyPost($token, $api_url);
$post_data = json_decode($post, true) ?: [];

//日付変換 UTC->JST
$post_date = new DateTime($post_data['posts'][0]['record']['createdAt']);
$post_date->setTimeZone(new DateTimeZone('Asia/Tokyo'));

$bluesky_embed = <<<EOT
<blockquote class="bluesky-embed" data-bluesky-uri="{$post_data['posts'][0]['uri']}" data-bluesky-cid="{$post_data['posts'][0]['cid']}" data-bluesky-embed-color-mode="system"><p lang="{$post_data['posts'][0]['record']['langs'][0]}">{$post_data['posts'][0]['record']['text']}<br><br><a href="https://bsky.app/profile/{$post_data['posts'][0]['author']['did']}/post/{$match[2]}?ref_src=embed">[image or embed]</a></p>&mdash; {$post_data['posts'][0]['author']['displayName']} (<a href="https://bsky.app/profile/{$post_data['posts'][0]['author']['did']}?ref_src=embed">@{$post_data['posts'][0]['author']['handle']}</a>) <a href="https://bsky.app/profile/{$post_data['posts'][0]['author']['did']}/post/{$match[2]}?ref_src=embed">{$post_date->format('Y年n月j日 G:i')}</a></blockquote><script async src="https://embed.bsky.app/static/embed.js" charset="utf-8"></script>
EOT;

echo $bluesky_embed;