<?php
class TwitterBridge extends BridgeAbstract{

	public function loadMetadatas() {

		$this->maintainer = "mitsukarenai";
		$this->name = "Twitter Bridge";
		$this->uri = "https://twitter.com/";
		$this->description = "Returns tweets by keyword/hashtag or user name";

        $this->parameters["global"] = array(
          'nopic'=>array(
            'name'=>'Hide profile pictures',
            'type'=>'checkbox',
            'title'=>'Activate to hide profile pictures in content'
          )
        );

        $this->parameters["By keyword or hashtag"] = array(
          'q'=>array(
            'name'=>'Keyword or #hashtag',
            'required'=>true,
            'exampleValue'=>'rss-bridge, #rss-bridge',
            'title'=>'Insert a keyword or hashtag'
          )
        );

        $this->parameters["By username"] = array(
          'u'=>array(
            'name'=>'username',
            'required'=>true,
            'exampleValue'=>'sebsauvage',
            'title'=>'Insert a user name'
          ),
          'norep'=>array(
            'name'=>'Without replies',
            'type'=>'checkbox',
            'title'=>'Only return initial tweets'
          )
        );
	}

    public function getName(){
        switch($this->queriedContext){
        case 'By keyword or hashtag':
            $specific='search ';
            $param='q';
            break;
        case 'By username':
            $specific='@';
            $param='u';
            break;
        }
        return 'Twitter '.$specific
            .$this->parameters[$this->queriedContext][$param]['value'];
    }

    public function getURI(){
        $params=$this->parameters[$this->queriedContext];
        switch($this->queriedContext){
        case 'By keyword or hashtag':
            return $this->uri.'search?q='.urlencode($params['q']['value']);
        case 'By username':
            return $this->uri.urlencode($params['u']['value']).
                (isset($params['norep']['value'])?'':'/with_replies');
        }
    }

	public function collectData(){
        $param=$this->parameters[$this->queriedContext];
		$html = '';
		if (isset($param['q']['value'])) {   /* keyword search mode */
			$html = $this->getSimpleHTMLDOM('https://twitter.com/search?q='.urlencode($param['q']['value']).'&f=tweets') or $this->returnServerError('No results for this query.');
		}
		elseif (isset($param['u']['value'])) {   /* user timeline mode */
			$html = $this->getSimpleHTMLDOM('https://twitter.com/'.urlencode($param['u']['value']).(isset($param['norep']['value'])?'':'/with_replies')) or $this->returnServerError('Requested username can\'t be found.');
		}
		else {
			$this->returnClientError('You must specify a keyword (?q=...) or a Twitter username (?u=...).');
		}

		$hidePictures = false;
		if (isset($param['nopic']['value']))
			$hidePictures = $param['nopic']['value'] === 'on';

		foreach($html->find('div.js-stream-tweet') as $tweet) {
			$item = array();
			// extract username and sanitize
			$item['username'] = $tweet->getAttribute('data-screen-name');
			// extract fullname (pseudonym)
			$item['fullname'] = $tweet->getAttribute('data-name');
			// get author
			$item['author'] = $item['fullname'] . ' (@' . $item['username'] . ')';
			// get avatar link
			$item['avatar'] = $tweet->find('img', 0)->src;
			// get TweetID
			$item['id'] = $tweet->getAttribute('data-tweet-id');
			// get tweet link
			$item['uri'] = 'https://twitter.com'.$tweet->find('a.js-permalink', 0)->getAttribute('href');
			// extract tweet timestamp
			$item['timestamp'] = $tweet->find('span.js-short-timestamp', 0)->getAttribute('data-time');
			// generate the title
			$item['title'] = strip_tags(html_entity_decode($tweet->find('p.js-tweet-text', 0)->innertext,ENT_QUOTES,'UTF-8'));

			// processing content links
			foreach($tweet->find('a') as $link) {
				if($link->hasAttribute('data-expanded-url') ) {
					$link->href = $link->getAttribute('data-expanded-url');
				}
				$link->removeAttribute('data-expanded-url');
				$link->removeAttribute('data-query-source');
				$link->removeAttribute('rel');
				$link->removeAttribute('class');
				$link->removeAttribute('target');
				$link->removeAttribute('title');
			}

			// process emojis (reduce size)
			foreach($tweet->find('img.Emoji') as $img){
				$img->style .= ' height: 1em;';
			}

			// get tweet text
			$cleanedTweet = str_replace('href="/', 'href="https://twitter.com/', $tweet->find('p.js-tweet-text', 0)->innertext);

			// Add picture to content
			$picture_html = '';
			if(!$hidePictures){
				$picture_html = <<<EOD
<a href="https://twitter.com/{$item['username']}"><img style="align: top; width:75 px; border: 1px solid black;" alt="{$item['username']}" src="{$item['avatar']}" title="{$item['fullname']}" /></a>
EOD;
			}

			// add content
			$item['content'] = <<<EOD
<div style="display: inline-block; vertical-align: top;">
	{$picture_html}
</div>
<div style="display: inline-block; vertical-align: top;">
	<blockquote>{$cleanedTweet}</blockquote>
</div>
EOD;

			// put out
			$this->items[] = $item;
		}
	}

	public function getCacheDuration(){
		return 300; // 5 minutes
	}
}