rss-bridge/bridges/DribbbleBridge.php

<?php

class DribbbleBridge extends BridgeAbstract
{
    const MAINTAINER = 'quentinus95';
    const NAME = 'Dribbble popular shots';
    const URI = 'https://dribbble.com';
    const CACHE_TIMEOUT = 1800;
    const DESCRIPTION = 'Returns the newest popular shots from Dribbble.';

    public function getIcon()
    {
        return 'https://cdn.dribbble.com/assets/
favicon-63b2904a073c89b52b19aa08cebc16a154bcf83fee8ecc6439968b1e6db569c7.ico';
    }

    public function collectData()
    {
        $html = getSimpleHTMLDOM(self::URI);

        $json = $this->loadEmbeddedJsonData($html);

        foreach ($html->find('li[id^="screenshot-"]') as $shot) {
            $item = [];

            $additional_data = $this->findJsonForShot($shot, $json);
            if ($additional_data === null) {
                $item['uri'] = self::URI . $shot->find('a', 0)->href;
                $item['title'] = $shot->find('.shot-title', 0)->plaintext;
            } else {
                $item['timestamp'] = strtotime($additional_data['published_at']);
                $item['uri'] = self::URI . $additional_data['path'];
                $item['title'] = $additional_data['title'];
            }

            $item['author'] = trim($shot->find('.user-information .display-name', 0)->plaintext);

            $description = $shot->find('.comment', 0);
            $item['content'] = $description === null ? '' : $description->plaintext;

            $preview_path = $shot->find('figure img', 1)->attr['data-srcset'];
            $item['content'] .= $this->getImageTag($preview_path, $item['title']);
            $item['enclosures'] = [$this->getFullSizeImagePath($preview_path)];

            $this->items[] = $item;
        }
    }

    private function loadEmbeddedJsonData($html)
    {
        $json = [];
        $scripts = $html->find('script');

        foreach ($scripts as $script) {
            if (strpos($script->innertext, 'newestShots') !== false) {
                // fix single quotes
                $script->innertext = preg_replace('/\'(.*)\'(,?)$/im', '"\1"\2', $script->innertext);

                // fix JavaScript JSON (why do they not adhere to the standard?)
                $script->innertext = preg_replace('/^(\s*)(\w+):/im', '\1"\2":', $script->innertext);

                // fix relative dates, so they are recognized by strtotime
                $script->innertext = preg_replace('/"about ([0-9]+ hours? ago)"(,?)$/im', '"\1"\2', $script->innertext);

                // find beginning of JSON array
                $start = strpos($script->innertext, '[');

                // find end of JSON array, compensate for missing character!
                $end = strpos($script->innertext, '];') + 1;

                // convert JSON to PHP array
                $json = json_decode(substr($script->innertext, $start, $end - $start), true);
                break;
            }
        }

        return $json;
    }

    private function findJsonForShot($shot, $json)
    {
        foreach ($json as $element) {
            if (strpos($shot->getAttribute('id'), (string)$element['id']) !== false) {
                return $element;
            }
        }

        return null;
    }

    private function getImageTag($preview_path, $title)
    {
        return sprintf(
            '<br /> <a href="%s"><img srcset="%s" alt="%s" /></a>',
            $this->getFullSizeImagePath($preview_path),
            $preview_path,
            $title
        );
    }

    private function getFullSizeImagePath($preview_path)
    {
        // Get last image from srcset
        $src_set_urls = explode(',', $preview_path);
        $url = end($src_set_urls);
        $url = explode(' ', $url)[1];

        return htmlspecialchars_decode($url);
    }
}