rss-bridge/bridges/GithubIssueBridge.php

<?php
class GithubIssueBridge extends BridgeAbstract
{
    const MAINTAINER = 'Pierre Mazière';
    const NAME = 'Github Issue';
    const URI = 'https://github.com/';
    const CACHE_TIMEOUT = 600; // 10min
  const DESCRIPTION = 'Returns the issues or comments of an issue of a github project';

    const PARAMETERS=array(
    'global'=>array(
      'u'=>array(
        'name'=>'User name',
        'required'=>true
      ),
      'p'=>array(
        'name'=>'Project name',
        'required'=>true
      )
    ),

    'Project Issues'=>array(
      'c'=>array(
        'name'=>'Show Issues Comments',
        'type'=>'checkbox'
      )
    ),
    'Issue comments'=>array(
      'i'=>array(
        'name'=>'Issue number',
        'type'=>'number',
        'required'=>'true'
      )
    )
  );

    public function getName()
    {
        $name=$this->getInput('u').'/'.$this->getInput('p');
        switch ($this->queriedContext) {
    case 'Project Issues':
      if ($this->getInput('c')) {
          $prefix=static::NAME.'s comments for ';
      } else {
          $prefix=static::NAME.'s for ';
      }
      $name=$prefix.$name;
      break;
    case 'Issue comments':
      $name=static::NAME.' '.$name.' #'.$this->getInput('i');
      break;
    }
        return $name;
    }

    public function getURI()
    {
        $uri = static::URI.$this->getInput('u').'/'.$this->getInput('p').'/issues';
        if ($this->queriedContext==='Issue comments') {
            $uri.='/'.$this->getInput('i');
        } elseif ($this->getInput('c')) {
            $uri.='?q=is%3Aissue+sort%3Aupdated-desc';
        }
        return $uri;
    }

    protected function extractIssueComment($issueNbr, $title, $comment)
    {
        $class=$comment->getAttribute('class');
        $classes=explode(' ', $class);
        $event=false;
        if (in_array('discussion-item', $classes)) {
            $event=true;
        }

        $author='unknown';
        if ($comment->find('.author', 0)) {
            $author=$comment->find('.author', 0)->plaintext;
        }

        $uri=static::URI.$this->getInput('u').'/'.$this->getInput('p').'/issues/'
      .$issueNbr;

        $comment=$comment->firstChild();
        if (!$event) {
            $comment=$comment->nextSibling();
        }

        if ($event) {
            $title.=' / '.substr($class, strpos($class, 'discussion-item-')+strlen('discussion-item-'));
            if (!$comment->hasAttribute('id')) {
                $items=array();
                $timestamp=strtotime($comment->find('relative-time', 0)->getAttribute('datetime'));
                $content=$comment->innertext;
                while ($comment=$comment->nextSibling()) {
                    $item=array();
                    $item['author']=$author;
                    $item['title']=html_entity_decode($title, ENT_QUOTES, 'UTF-8');
                    $item['timestamp']=$timestamp;
                    $item['content']=$content.'<p>'.$comment->children(1)->innertext.'</p>';
                    $item['uri']=$uri.'#'.$comment->children(1)->getAttribute('id');
                    $items[]=$item;
                }
                return $items;
            }
            $content=$comment->parent()->innertext;
        } else {
            $title.=' / '.trim($comment->firstChild()->plaintext);
            $content="<pre>".$comment->find('.comment-body', 0)->innertext."</pre>";
        }

        $item = array();
        $item['author']=$author;
        $item['uri']= $uri.'#'.$comment->getAttribute('id');
        $item['title']=html_entity_decode($title, ENT_QUOTES, 'UTF-8');
        $item['timestamp']=strtotime($comment->find('relative-time', 0)->getAttribute('datetime'));
        $item['content']=$content;
        return $item;
    }

    protected function extractIssueComments($issue)
    {
        $items=array();
        $title=$issue->find('.gh-header-title', 0)->plaintext;
        $issueNbr=trim(substr($issue->find('.gh-header-number', 0)->plaintext, 1));
        $comments=$issue->find('.js-discussion', 0);
        foreach ($comments->children() as $comment) {
            $classes=explode(' ', $comment->getAttribute('class'));
            if (in_array('discussion-item', $classes) ||
        in_array('timeline-comment-wrapper', $classes)
      ) {
                $item=$this->extractIssueComment($issueNbr, $title, $comment);
                if (array_keys($item)!==range(0, count($item)-1)) {
                    $item=array($item);
                }
                $items=array_merge($items, $item);
            }
        }
        return $items;
    }

    public function collectData()
    {
        $html = getSimpleHTMLDOM($this->getURI())
      or returnServerError('No results for Github Issue '.$this->getURI());

        switch ($this->queriedContext) {
    case 'Issue comments':
      $this->items=$this->extractIssueComments($html);
      break;
    case 'Project Issues':
      foreach ($html->find('.js-active-navigation-container .js-navigation-item') as $issue) {
          $info=$issue->find('.opened-by', 0);
          $issueNbr=substr(trim($info->plaintext), 1, strpos(trim($info->plaintext), ' '));

          $item=array();
          $item['content']='';

          if ($this->getInput('c')) {
              $uri=static::URI.$this->getInput('u').'/'.$this->getInput('p').'/issues/'.$issueNbr;
              $issue=getSimpleHTMLDOMCached($uri, static::CACHE_TIMEOUT);
              if ($issue) {
                  $this->items=array_merge($this->items, $this->extractIssueComments($issue));
                  continue;
              }
              $item['content']='Can not extract comments from '.$uri;
          }

          $item['author']=$info->find('a', 0)->plaintext;
          $item['timestamp']=strtotime($info->find('relative-time', 0)->getAttribute('datetime'));
          $item['title']=html_entity_decode(
          $issue->find('.js-navigation-open', 0)->plaintext,
          ENT_QUOTES,
          'UTF-8'
        );
          $comments=$issue->find('.col-5', 0)->plaintext;
          $item['content'].="\n".'Comments: '.($comments?$comments:'0');
          $item['uri']=self::URI.$issue->find('.js-navigation-open', 0)->getAttribute('href');
          $this->items[]=$item;
      }
      break;
    }

        array_walk($this->items, function (&$item) {
            $item['content']=preg_replace('/\s+/', ' ', $item['content']);
            $item['content']=str_replace('href="/', 'href="'.static::URI, $item['content']);
            $item['content']=str_replace(
        'href="#',
        'href="'.substr($item['uri'], 0, strpos($item['uri'], '#')+1),
        $item['content']
      );
            $item['title']=preg_replace('/\s+/', ' ', $item['title']);
        });
    }
}