mirror of
https://github.com/BookStackApp/BookStack.git
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![Dan Brown](/assets/img/avatar_default.png)
* Started mass-refactoring of the current entity repos * Rewrote book tree logic - Now does two simple queries instead of one really complex one. - Extracted logic into its own class. - Remove model-level akward union field listing. - Logic now more readable than being large separate query and compilation functions. * Extracted and split book sort logic * Finished up Book controller/repo organisation * Refactored bookshelves controllers and repo parts * Fixed issues found via phpunit * Refactored Chapter controller * Updated Chapter export controller * Started Page controller/repo refactor * Refactored another chunk of PageController * Completed initial pagecontroller refactor pass * Fixed tests and continued reduction of old repos * Removed old page remove and further reduced entity repo * Removed old entity repo, split out page controller * Ran phpcbf and split out some page content methods * Tidied up some EntityProvider elements * Fixed issued caused by viewservice change
223 lines
6.8 KiB
PHP
223 lines
6.8 KiB
PHP
<?php namespace BookStack\Entities;
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use BookStack\Entities\Managers\BookContents;
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use BookStack\Entities\Managers\PageContent;
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use BookStack\Uploads\ImageService;
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use DomPDF;
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use Exception;
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use SnappyPDF;
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use Throwable;
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class ExportService
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{
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protected $imageService;
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/**
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* ExportService constructor.
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*/
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public function __construct(ImageService $imageService)
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{
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$this->imageService = $imageService;
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}
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/**
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* Convert a page to a self-contained HTML file.
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* Includes required CSS & image content. Images are base64 encoded into the HTML.
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* @throws Throwable
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*/
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public function pageToContainedHtml(Page $page)
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{
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$page->html = (new PageContent($page))->render();
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$pageHtml = view('pages/export', [
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'page' => $page
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])->render();
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return $this->containHtml($pageHtml);
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}
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/**
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* Convert a chapter to a self-contained HTML file.
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* @throws Throwable
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*/
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public function chapterToContainedHtml(Chapter $chapter)
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{
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$pages = $chapter->getVisiblePages();
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$pages->each(function ($page) {
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$page->html = (new PageContent($page))->render();
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});
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$html = view('chapters/export', [
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'chapter' => $chapter,
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'pages' => $pages
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])->render();
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return $this->containHtml($html);
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}
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/**
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* Convert a book to a self-contained HTML file.
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* @throws Throwable
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*/
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public function bookToContainedHtml(Book $book)
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{
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$bookTree = (new BookContents($book))->getTree(false, true);
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$html = view('books/export', [
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'book' => $book,
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'bookChildren' => $bookTree
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])->render();
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return $this->containHtml($html);
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}
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/**
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* Convert a page to a PDF file.
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* @throws Throwable
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*/
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public function pageToPdf(Page $page)
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{
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$page->html = (new PageContent($page))->render();
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$html = view('pages/pdf', [
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'page' => $page
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])->render();
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return $this->htmlToPdf($html);
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}
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/**
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* Convert a chapter to a PDF file.
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* @throws Throwable
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*/
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public function chapterToPdf(Chapter $chapter)
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{
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$pages = $chapter->getVisiblePages();
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$pages->each(function ($page) {
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$page->html = (new PageContent($page))->render();
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});
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$html = view('chapters/export', [
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'chapter' => $chapter,
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'pages' => $pages
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])->render();
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return $this->htmlToPdf($html);
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}
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/**
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* Convert a book to a PDF file.
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* @throws Throwable
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*/
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public function bookToPdf(Book $book)
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{
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$bookTree = (new BookContents($book))->getTree(false, true);
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$html = view('books/export', [
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'book' => $book,
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'bookChildren' => $bookTree
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])->render();
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return $this->htmlToPdf($html);
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}
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/**
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* Convert normal web-page HTML to a PDF.
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* @throws Exception
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*/
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protected function htmlToPdf(string $html): string
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{
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$containedHtml = $this->containHtml($html);
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$useWKHTML = config('snappy.pdf.binary') !== false;
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if ($useWKHTML) {
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$pdf = SnappyPDF::loadHTML($containedHtml);
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$pdf->setOption('print-media-type', true);
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} else {
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$pdf = DomPDF::loadHTML($containedHtml);
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}
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return $pdf->output();
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}
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/**
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* Bundle of the contents of a html file to be self-contained.
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* @throws Exception
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*/
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protected function containHtml(string $htmlContent): string
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{
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$imageTagsOutput = [];
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preg_match_all("/\<img.*src\=(\'|\")(.*?)(\'|\").*?\>/i", $htmlContent, $imageTagsOutput);
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// Replace image src with base64 encoded image strings
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if (isset($imageTagsOutput[0]) && count($imageTagsOutput[0]) > 0) {
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foreach ($imageTagsOutput[0] as $index => $imgMatch) {
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$oldImgTagString = $imgMatch;
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$srcString = $imageTagsOutput[2][$index];
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$imageEncoded = $this->imageService->imageUriToBase64($srcString);
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if ($imageEncoded === null) {
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$imageEncoded = $srcString;
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}
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$newImgTagString = str_replace($srcString, $imageEncoded, $oldImgTagString);
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$htmlContent = str_replace($oldImgTagString, $newImgTagString, $htmlContent);
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}
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}
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$linksOutput = [];
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preg_match_all("/\<a.*href\=(\'|\")(.*?)(\'|\").*?\>/i", $htmlContent, $linksOutput);
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// Replace image src with base64 encoded image strings
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if (isset($linksOutput[0]) && count($linksOutput[0]) > 0) {
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foreach ($linksOutput[0] as $index => $linkMatch) {
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$oldLinkString = $linkMatch;
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$srcString = $linksOutput[2][$index];
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if (strpos(trim($srcString), 'http') !== 0) {
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$newSrcString = url($srcString);
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$newLinkString = str_replace($srcString, $newSrcString, $oldLinkString);
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$htmlContent = str_replace($oldLinkString, $newLinkString, $htmlContent);
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}
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}
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}
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// Replace any relative links with system domain
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return $htmlContent;
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}
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/**
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* Converts the page contents into simple plain text.
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* This method filters any bad looking content to provide a nice final output.
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*/
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public function pageToPlainText(Page $page): string
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{
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$html = (new PageContent($page))->render();
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$text = strip_tags($html);
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// Replace multiple spaces with single spaces
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$text = preg_replace('/\ {2,}/', ' ', $text);
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// Reduce multiple horrid whitespace characters.
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$text = preg_replace('/(\x0A|\xA0|\x0A|\r|\n){2,}/su', "\n\n", $text);
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$text = html_entity_decode($text);
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// Add title
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$text = $page->name . "\n\n" . $text;
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return $text;
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}
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/**
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* Convert a chapter into a plain text string.
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*/
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public function chapterToPlainText(Chapter $chapter): string
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{
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$text = $chapter->name . "\n\n";
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$text .= $chapter->description . "\n\n";
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foreach ($chapter->pages as $page) {
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$text .= $this->pageToPlainText($page);
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}
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return $text;
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}
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/**
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* Convert a book into a plain text string.
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*/
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public function bookToPlainText(Book $book): string
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{
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$bookTree = (new BookContents($book))->getTree(false, true);
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$text = $book->name . "\n\n";
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foreach ($bookTree as $bookChild) {
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if ($bookChild->isA('chapter')) {
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$text .= $this->chapterToPlainText($bookChild);
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} else {
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$text .= $this->pageToPlainText($bookChild);
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}
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}
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return $text;
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}
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}
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