Added plaintext & basic PDF page Export

Author: ssddanbrown

app/Http/Controllers/PageController.php

@@ -226,13 +226,22 @@ public function restoreRevision($bookSlug, $pageSlug, $revisionId)
         return redirect($page->getUrl());
     }
 
+    /**
+     * Exports a page to pdf format using barryvdh/laravel-dompdf wrapper.
+     * https://github.com/barryvdh/laravel-dompdf
+     * @param $bookSlug
+     * @param $pageSlug
+     * @return \Illuminate\Http\Response
+     */
     public function exportPdf($bookSlug, $pageSlug)
     {
         $book = $this->bookRepo->getBySlug($bookSlug);
         $page = $this->pageRepo->getBySlug($pageSlug, $book->id);
-        $cssContent = file_get_contents(public_path('/css/styles.css'));
-
-        return $pdf->download($pageSlug . '.pdf');
+        $pdfContent = $this->exportService->pageToPdf($page);
+        return response()->make($pdfContent, 200, [
+            'Content-Type' => 'application/octet-stream',
+            'Content-Disposition' => 'attachment; filename="'.$pageSlug.'.pdf'
+        ]);
     }
 
     /**
@@ -251,4 +260,22 @@ public function exportHtml($bookSlug, $pageSlug)
             'Content-Disposition' => 'attachment; filename="'.$pageSlug.'.html'
         ]);
     }
+
+    /**
+     * Export a page to a simple plaintext .txt file.
+     * @param $bookSlug
+     * @param $pageSlug
+     * @return \Illuminate\Http\Response
+     */
+    public function exportPlainText($bookSlug, $pageSlug)
+    {
+        $book = $this->bookRepo->getBySlug($bookSlug);
+        $page = $this->pageRepo->getBySlug($pageSlug, $book->id);
+        $containedHtml = $this->exportService->pageToPlainText($page);
+        return response()->make($containedHtml, 200, [
+            'Content-Type' => 'application/octet-stream',
+            'Content-Disposition' => 'attachment; filename="'.$pageSlug.'.txt'
+        ]);
+    }
+
 }

app/Http/routes.php

@@ -24,6 +24,7 @@
         Route::get('/{bookSlug}/page/{pageSlug}', 'PageController@show');
         Route::get('/{bookSlug}/page/{pageSlug}/export/pdf', 'PageController@exportPdf');
         Route::get('/{bookSlug}/page/{pageSlug}/export/html', 'PageController@exportHtml');
+        Route::get('/{bookSlug}/page/{pageSlug}/export/plaintext', 'PageController@exportPlainText');
         Route::get('/{bookSlug}/page/{pageSlug}/edit', 'PageController@edit');
         Route::get('/{bookSlug}/page/{pageSlug}/delete', 'PageController@showDelete');
         Route::put('/{bookSlug}/page/{pageSlug}', 'PageController@update');
@@ -46,7 +47,6 @@
 
     });
 
-
     // Users
     Route::get('/users', 'UserController@index');
     Route::get('/users/create', 'UserController@create');

app/Services/ExportService.php

@@ -6,20 +6,42 @@
 class ExportService
 {
 
-
     /**
      * Convert a page to a self-contained HTML file.
      * Includes required CSS & image content. Images are base64 encoded into the HTML.
      * @param Page $page
      * @return mixed|string
      */
     public function pageToContainedHtml(Page $page)
+    {
+        $cssContent = file_get_contents(public_path('/css/export-styles.css'));
+        $pageHtml = view('pages/export', ['page' => $page, 'css' => $cssContent])->render();
+        return $this->containHtml($pageHtml);
+    }
+
+    /**
+     * Convert a page to a pdf file.
+     * @param Page $page
+     * @return mixed|string
+     */
+    public function pageToPdf(Page $page)
     {
         $cssContent = file_get_contents(public_path('/css/export-styles.css'));
         $pageHtml = view('pages/pdf', ['page' => $page, 'css' => $cssContent])->render();
+        $containedHtml = $this->containHtml($pageHtml);
+        $pdf = \PDF::loadHTML($containedHtml);
+        return $pdf->output();
+    }
 
+    /**
+     * Bundle of the contents of a html file to be self-contained.
+     * @param $htmlContent
+     * @return mixed|string
+     */
+    protected function containHtml($htmlContent)
+    {
         $imageTagsOutput = [];
-        preg_match_all("/\<img.*src\=(\'|\")(.*?)(\'|\").*?\>/i", $pageHtml, $imageTagsOutput);
+        preg_match_all("/\<img.*src\=(\'|\")(.*?)(\'|\").*?\>/i", $htmlContent, $imageTagsOutput);
 
         // Replace image src with base64 encoded image strings
         if (isset($imageTagsOutput[0]) && count($imageTagsOutput[0]) > 0) {
@@ -34,12 +56,12 @@ public function pageToContainedHtml(Page $page)
                 $imageContent = file_get_contents($pathString);
                 $imageEncoded = 'data:image/' . pathinfo($pathString, PATHINFO_EXTENSION) . ';base64,' . base64_encode($imageContent);
                 $newImageString = str_replace($srcString, $imageEncoded, $oldImgString);
-                $pageHtml = str_replace($oldImgString, $newImageString, $pageHtml);
+                $htmlContent = str_replace($oldImgString, $newImageString, $htmlContent);
             }
         }
 
         $linksOutput = [];
-        preg_match_all("/\<a.*href\=(\'|\")(.*?)(\'|\").*?\>/i", $pageHtml, $linksOutput);
+        preg_match_all("/\<a.*href\=(\'|\")(.*?)(\'|\").*?\>/i", $htmlContent, $linksOutput);
 
         // Replace image src with base64 encoded image strings
         if (isset($linksOutput[0]) && count($linksOutput[0]) > 0) {
@@ -49,13 +71,45 @@ public function pageToContainedHtml(Page $page)
                 if (strpos(trim($srcString), 'http') !== 0) {
                     $newSrcString = url($srcString);
                     $newLinkString = str_replace($srcString, $newSrcString, $oldLinkString);
-                    $pageHtml = str_replace($oldLinkString, $newLinkString, $pageHtml);
+                    $htmlContent = str_replace($oldLinkString, $newLinkString, $htmlContent);
                 }
             }
         }
 
         // Replace any relative links with system domain
-        return $pageHtml;
+        return $htmlContent;
+    }
+
+    /**
+     * Converts the page contents into simple plain text.
+     * This method filters any bad looking content to
+     * provide a nice final output.
+     * @param Page $page
+     * @return mixed
+     */
+    public function pageToPlainText(Page $page)
+    {
+        $text = $page->text;
+        // Replace multiple spaces with single spaces
+        $text = preg_replace('/\ {2,}/', ' ', $text);
+        // Reduce multiple horrid whitespace characters.
+        $text = preg_replace('/(\x0A|\xA0|\x0A|\r|\n){2,}/su', "\n\n", $text);
+        $text = html_entity_decode($text);
+        // Add title
+        $text = $page->name . "\n\n" . $text;
+        return $text;
     }
 
-}
+}
+
+
+
+
+
+
+
+
+
+
+
+

composer.json

@@ -11,7 +11,8 @@
         "laravel/socialite": "^2.0",
         "barryvdh/laravel-ide-helper": "^2.1",
         "barryvdh/laravel-debugbar": "^2.0",
-        "league/flysystem-aws-s3-v3": "^1.0"
+        "league/flysystem-aws-s3-v3": "^1.0",
+        "barryvdh/laravel-dompdf": "0.6.*"
     },
     "require-dev": {
         "fzaninotto/faker": "~1.4",