daux.io/libs/Format/Base/EmbedImages.php

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<?php
/**
* Created by IntelliJ IDEA.
* User: onigoetz
* Date: 06/11/15
* Time: 20:27
*/
namespace Todaymade\Daux\Format\Base;
use DOMDocument;
use Todaymade\Daux\DauxHelper;
use Todaymade\Daux\Tree\Content;
use Todaymade\Daux\Tree\Root;
class EmbedImages
{
protected $tree;
public function __construct(Root $tree)
{
$this->tree = $tree;
}
public function embed($page, Content $file, $callback)
{
return preg_replace_callback(
"/<img\\s+[^>]*src=['\"]([^\"]*)['\"][^>]*>/",
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function($matches) use ($file, $callback) {
if ($result = $this->findImage($matches[1], $matches[0], $file, $callback)) {
return $result;
}
return $matches[0];
},
$page
);
}
private function getAttributes($tag)
{
$dom = new DOMDocument();
$dom->loadHTML($tag);
$img = $dom->getElementsByTagName('img')->item(0);
$attributes = ['align', 'class', 'title', 'style', 'alt', 'height', 'width'];
$used = [];
foreach ($attributes as $attr) {
if ($img->attributes->getNamedItem($attr)) {
$used[$attr] = $img->attributes->getNamedItem($attr)->value;
}
}
return $used;
}
private function findImage($src, $tag, Content $file, $callback)
{
//for protocol relative or http requests : keep the original one
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if (substr($src, 0, strlen('http')) === 'http' || substr($src, 0, strlen('//')) === '//') {
return $src;
}
//Get the path to the file, relative to the root of the documentation
$url = DauxHelper::getCleanPath(dirname($file->getUrl()) . '/' . $src);
//Get any file corresponding to the right one
$file = DauxHelper::getFile($this->tree, $url);
if ($file === false) {
return false;
}
$result = $callback($src, $this->getAttributes($tag), $file);
return $result ?: $src;
}
}