Split out export actions into own controllers

app/Http/Controllers/PageExportController.php

@@ -0,0 +1,81 @@
+<?php
+
+namespace BookStack\Http\Controllers;
+
+use BookStack\Entities\ExportService;
+use BookStack\Entities\Repos\PageRepo;
+use BookStack\Exceptions\NotFoundException;
+use Illuminate\Http\Response;
+use Throwable;
+
+class PageExportController extends Controller
+{
+    /**
+     * @var PageRepo
+     */
+    protected $pageRepo;
+
+    /**
+     * @var ExportService
+     */
+    protected $exportService;
+
+    /**
+     * PageExportController constructor.
+     * @param PageRepo $pageRepo
+     * @param ExportService $exportService
+     */
+    public function __construct(PageRepo $pageRepo, ExportService $exportService)
+    {
+        $this->pageRepo = $pageRepo;
+        $this->exportService = $exportService;
+        parent::__construct();
+    }
+
+    /**
+     * Exports a page to a PDF.
+     * https://github.com/barryvdh/laravel-dompdf
+     * @param string $bookSlug
+     * @param string $pageSlug
+     * @return Response
+     * @throws NotFoundException
+     * @throws Throwable
+     */
+    public function pdf(string $bookSlug, string $pageSlug)
+    {
+        $page = $this->pageRepo->getPageBySlug($pageSlug, $bookSlug);
+        $page->html = $this->pageRepo->renderPage($page);
+        $pdfContent = $this->exportService->pageToPdf($page);
+        return $this->downloadResponse($pdfContent, $pageSlug . '.pdf');
+    }
+
+    /**
+     * Export a page to a self-contained HTML file.
+     * @param string $bookSlug
+     * @param string $pageSlug
+     * @return Response
+     * @throws NotFoundException
+     * @throws Throwable
+     */
+    public function html(string $bookSlug, string $pageSlug)
+    {
+        $page = $this->pageRepo->getPageBySlug($pageSlug, $bookSlug);
+        $page->html = $this->pageRepo->renderPage($page);
+        $containedHtml = $this->exportService->pageToContainedHtml($page);
+        return $this->downloadResponse($containedHtml, $pageSlug . '.html');
+    }
+
+    /**
+     * Export a page to a simple plaintext .txt file.
+     * @param string $bookSlug
+     * @param string $pageSlug
+     * @return Response
+     * @throws NotFoundException
+     */
+    public function plainText(string $bookSlug, string $pageSlug)
+    {
+        $page = $this->pageRepo->getPageBySlug($pageSlug, $bookSlug);
+        $pageText = $this->exportService->pageToPlainText($page);
+        return $this->downloadResponse($pageText, $pageSlug . '.txt');
+    }
+}