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DvachClient.php
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DvachClient.php
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<?php
declare(strict_types=1);
namespace phpClub\BoardClient;
use GuzzleHttp\Client;
use phpClub\Entity\File;
use phpClub\Entity\Post;
use phpClub\Entity\Thread;
class DvachClient
{
/** Return an array of thread URLs (links to JSON files), [threadId => URL] */
const RETURN_URLS = 'RETURN_URLS';
/** Return an array of JSON files, [threadId => JSON] */
const RETURN_BODIES = 'RETURN_BODIES';
/** Parse threads and return an array of Thread objects [threadId => Thread] */
const RETURN_THREADS = 'RETURN_THREADS';
// Fixes 2ch.hk API poor naming
private const POST_AUTHOR = 'name';
private const POST_TITLE = 'subject';
private const POST_TEXT = 'comment';
private const THREAD_TITLE = 'subject';
private Client $guzzle;
public function __construct(Client $guzzle)
{
$this->guzzle = $guzzle;
}
/**
* @param string $returnType One of constants self::RETURN_*, determines
* what will be returned.
* @return Thread[]|string[]
*/
public function getAlivePhpThreads(string $returnType = self::RETURN_THREADS): array {
$responseBody = (string) $this->guzzle->get('https://2ch.hk/pr/catalog.json')->getBody();
$responseJson = \GuzzleHttp\json_decode($responseBody, $assoc = true);
$threads = $responseJson['threads'];
$phpThreadsArray = array_filter($threads, [$this, 'looksLikePhpThread']);
$result = [];
foreach ($phpThreadsArray as $threadArray) {
$threadId = (int) $threadArray['num'];
$url = $this->makeThreadUrl($threadArray);
switch ($returnType) {
case self::RETURN_URLS:
$data = $url;
break;
case self::RETURN_BODIES:
$data = $this->downloadThread($url);
break;
case self::RETURN_THREADS:
$jsonString = $this->downloadThread($url);
$data = $this->extractThread($threadId, $jsonString);
break;
default:
throw new \InvalidArgumentException("Invalid return type $returnType");
}
$result[$threadId] = $data;
}
return $result;
}
private function looksLikePhpThread(array $threadArray): bool
{
return (bool) preg_match('/(Клуб.*PHP|PHP тред|PHP Thread #)/ui', $threadArray[self::THREAD_TITLE]);
}
private function makeThreadUrl(array $phpThread): string
{
$threadId = (int) $phpThread['num'];
return "https://2ch.hk/pr/res/{$threadId}.json";
}
/**
* Returns a string containing JSON for given thread URL
*/
private function downloadThread(string $url): string
{
$responseBody = (string) $this->guzzle->get($url)->getBody();
return $responseBody;
}
/**
* @throws \Exception
*/
private function extractThread(
int $threadId,
string $threadJson
): Thread {
$responseJson = \GuzzleHttp\json_decode($threadJson, $assoc = true);
$postsArray = $responseJson['threads'][0]['posts'] ?? null;
if ($postsArray === null) {
throw new \Exception('2ch.hk API has changed, path threads[0].posts is not exists');
}
$thread = new Thread($threadId);
foreach ($postsArray as $postArray) {
$post = $this->extractPost($postArray);
$post->setThread($thread);
$thread->addPost($post);
}
return $thread;
}
private function extractPost(array $postArray): Post
{
$post = new Post($postArray['num']);
$post->setTitle($postArray[self::POST_TITLE])
->setAuthor($postArray[self::POST_AUTHOR])
->setDate((new \DateTimeImmutable())->setTimestamp($postArray['timestamp']))
->setText($postArray[self::POST_TEXT]);
foreach ($postArray['files'] as $fileArray) {
$file = $this->extractFile($fileArray);
$file->setPost($post);
$post->addFile($file);
}
return $post;
}
private function extractFile(array $fileArray): File
{
return (new File())
->setPath('https://2ch.hk' . $fileArray['path'])
->setThumbPath('https://2ch.hk' . $fileArray['thumbnail'])
->setHeight($fileArray['height'])
->setWidth($fileArray['width'])
->setClientName($fileArray['fullname'] ?? $fileArray['name']);
}
}