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<?php

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namespace EmbedPress\Providers;

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use Embera\Provider\ProviderAdapter;

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use Embera\Provider\ProviderInterface;

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use Embera\Url;

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(defined('ABSPATH') && defined('EMBEDPRESS_IS_LOADED')) or die("No direct script access allowed.");

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/**

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* Entity responsible to support GitHub embeds.

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* @package EmbedPress

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* @subpackage EmbedPress/Providers

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* @author EmbedPress <help@embedpress.com>

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* @license GPLv3 or later

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* @since 1.0.0

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class GitHub extends ProviderAdapter implements ProviderInterface

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{

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/** inline {@inheritdoc} */

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protected static $hosts = ["github.com", "gist.github.com"];

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/**

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* Method that verifies if the embed URL belongs to GitHub.

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* @param Url $url

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* @return boolean

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* @since 1.0.0

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public function validateUrl(Url $url)

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{

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return (bool) preg_match(

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'/^(https?:\/\/)?gist\.github\.com\/([A-Za-z0-9_-]+\/)?([A-Za-z0-9]+)$/i',

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(string) $url

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);

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}

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public function validateGitHubUrl($url)

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{

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return (bool) preg_match(

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'/^(https?:\/\/)?gist\.github\.com\/([A-Za-z0-9_-]+\/)?([A-Za-z0-9]+)$/i',

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(string) $url

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);

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}

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/**

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* This method fakes an Oembed response.

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* @since 1.0.0

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* @return array

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public function fakeResponse()

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{

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$src_url = urldecode($this->url);

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// Check if the url is already converted to the embed format

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if ($this->validateGitHubUrl($src_url)) {

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$gist_url = $src_url . '.js';

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$response = wp_remote_get($gist_url);

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if (is_array($response) && !is_wp_error($response)) {

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$code = wp_remote_retrieve_body($response);

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$gist_html = str_replace('\n', '', $code);

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$code = wp_unslash( $gist_html );

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$code = explode("document.write('", $code);

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$code[1] = substr($code[1], 0, -3);

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$code[2] = substr($code[2], 0, -3);

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$code = implode("", $code);

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}

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} else {

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return [];

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}

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$width = isset($this->config['maxwidth']) ? $this->config['maxwidth'] : 600;

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$height = isset($this->config['maxheight']) ? $this->config['maxheight'] : 450;

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return [

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'type' => 'rich',

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'provider_name' => 'GitHub',

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'provider_url' => 'https://gist.github.com',

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'title' => 'Unknown title',

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'html' => $code,

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];

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}

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/** inline @inheritDoc */

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public function modifyResponse(array $response = [])

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{

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return $this->fakeResponse();

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}

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}

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