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Code Issues Releases Wiki Activity

Add base64 image support

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This commit is contained in:
awarre 2021-04-20 23:41:21 +00:00
parent 140aed3586
commit f8b5a0fd50
1 changed files with 59 additions and 0 deletions
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59
app/Entities/Tools/PageContent.php
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@ -1,9 +1,13 @@
<?php namespace BookStack\Entities\Tools;
use BookStack\Auth\Permissions\PermissionService;
use BookStack\Entities\Models\Page;
use BookStack\Entities\Tools\Markdown\CustomStrikeThroughExtension;
use BookStack\Facades\Theme;
use BookStack\Theming\ThemeEvents;
use BookStack\Uploads\Image;
use BookStack\Uploads\ImageRepo;
use BookStack\Uploads\ImageService;
use DOMDocument;
use DOMNodeList;
use DOMXPath;
@ -30,6 +34,7 @@ class PageContent
*/
public function setNewHTML(string $html)
{
$html = $this->saveBase64Images($this->page, $html);
$this->page->html = $this->formatHtml($html);
$this->page->text = $this->toPlainText();
$this->page->markdown = '';
@ -60,6 +65,60 @@ class PageContent
return $converter->convertToHtml($markdown);
}
/**
* Convert all base64 image data to saved images
*/
public function saveBase64Images(Page $page, string $htmlText): string
{
if ($htmlText == '') {
return $htmlText;
}
libxml_use_internal_errors(true);
$doc = new DOMDocument();
$doc->loadHTML(mb_convert_encoding($htmlText, 'HTML-ENTITIES', 'UTF-8'));
$container = $doc->documentElement;
$body = $container->childNodes->item(0);
$childNodes = $body->childNodes;
$xPath = new DOMXPath($doc);
// Get all img elements with image data blobs
$imageNodes = $xPath->query('//img[contains(@src, \'data:image\')]');
foreach($imageNodes as $imageNode) {
$imageSrc = $imageNode->getAttribute('src');
# Parse base64 data
$result = preg_match('"data:image/[a-zA-Z]*(;base64,[a-zA-Z0-9+/\\= ]*)"', $imageSrc, $matches);
if($result === 1) {
$base64ImageData = $matches[1];
$image = new Image();
$imageService = app()->make(ImageService::class);
$permissionService = app(PermissionService::class);
$imageRepo = new ImageRepo(new Image(), $imageService, $permissionService, $page);
# Use existing saveDrawing method used for Drawio diagrams
$image = $imageRepo->saveDrawing($base64ImageData, $page->id);
// Create a new img element with the saved image URI
$newNode = $doc->createElement('img');
$newNode->setAttribute('src', $image->path);
// Replace the old img element
$imageNode->parentNode->replaceChild($newNode, $imageNode);
}
}
// Generate inner html as a string
$html = '';
foreach ($childNodes as $childNode) {
$html .= $doc->saveHTML($childNode);
}
return $html;
}
/**
* Formats a page's html to be tagged correctly within the system.
*/