FEATURE #2350 @2h: add pipeline for displaying content

app/CMS/Contracts/Content/DisplayPipeline/Pipeline.php

@@ -0,0 +1,17 @@
+<?php
+namespace App\CMS\Contracts\Content\DisplayPipeline;
+
+use App\Models\Content\Content;
+
+interface Pipeline {
+    /**
+     * Add new process into pipeline
+     *
+     * @param Process $proces
+     *
+     * @return mixed
+     *
+     */
+    function add($process);
+    function run(Content $page);
+}

app/CMS/Contracts/Content/DisplayPipeline/Process.php

@@ -0,0 +1,15 @@
+<?php
+namespace App\CMS\Contracts\Content\DisplayPipeline;
+
+use App\Models\Content\Content;
+
+interface Process {
+    /**
+     * Process and modify given page
+     *
+     * @param Content $page
+     *
+     * @return mixed
+     */
+    function handle(Content & $page);
+}

app/CMS/Handlers/Handler.php

@@ -30,7 +30,7 @@ abstract class Handler extends BaseHandler implements AppHandler
      */
     public function render(Content $content, $parameters)
     {
-        return Controller::VisitorsView($content->template, ['page' => $content, 'extra' => $parameters]);
+
     }
 
     public static function getExtendedFormSections()

app/CMS/Helpers/PageRenderer.php

@@ -29,11 +29,8 @@ class PageRenderer
         /**
          * @var $handler AppHandler
          */
-        // get handler
         $handler = new $page->moduleHandler;
 
-        $page->content = Shortcode::compile($page->content);
-
         // render page
         return $handler->render($page, $parameters);
     }

app/CMS/Pipeline/DisplayPipeline.php

@@ -0,0 +1,112 @@
+<?php
+namespace App\CMS\Pipeline;
+
+use App\CMS\Contracts\Content\DisplayPipeline\Pipeline;
+use App\CMS\Contracts\Content\DisplayPipeline\Process;
+use App\CMS\Pipeline\Exceptions\InvalidProcessType;
+use App\Http\Controllers\Controller;
+use App\Models\Content\Content;
+
+class DisplayPipeline implements Pipeline
+{
+    protected $processes = [];
+    protected $beforeStart = null;
+    protected $beforeRender = null;
+
+    /**
+     * Add new process into pipeline
+     *
+     * @param $process
+     *
+     * @return void
+     * @throws InvalidProcessType
+     */
+    function add($process)
+    {
+        $this->checkValidProcess($process);
+
+        $this->processes[] = $process;
+    }
+
+    /**
+     * check if given classname implements Process interface
+     *
+     * @param $classname
+     *
+     * @throws InvalidProcessType
+     */
+    protected function checkValidProcess($classname)
+    {
+        if (!in_array(Process::class, class_implements($classname))) {
+            throw new InvalidProcessType($classname);
+        }
+    }
+
+    /**
+     * @param null $beforeStart
+     */
+    public function setBeforeStart($beforeStart)
+    {
+        $this->checkValidProcess($beforeStart);
+
+        if (!is_null($this->beforeStart)) {
+            array_unshift($this->processes, $this->beforeStart);
+        }
+
+        $this->beforeStart = $beforeStart;
+    }
+
+    /**
+     * @param null $beforeRender
+     */
+    public function setBeforeRender($beforeRender)
+    {
+        $this->checkValidProcess($beforeRender);
+
+        if (!is_null($this->beforeRender)) {
+            array_push($this->processes, $this->beforeRender);
+        }
+
+        $this->beforeRender = $beforeRender;
+    }
+
+    /**
+     * Run pipeline
+     *
+     * @param Content $page
+     *
+     * @return Content
+     */
+    function run(Content $page)
+    {
+        $this->runBeforeStart($page);
+
+        foreach ($this->processes as $process) {
+            /**
+             * @var $run Process
+             */
+            $run = new $process;
+            $run->handle($page);
+        }
+
+        $this->runBeforeRender($page);
+
+        return $page;
+    }
+
+    private function runBeforeStart($page)
+    {
+        if (!is_null($this->beforeStart)) {
+            $process = new $this->beforeStart;
+            $process->handle($page);
+        }
+    }
+
+    private function runBeforeRender($page)
+    {
+        if (!is_null($this->beforeRender)) {
+            $process = new $this->beforeRender;
+            $process->handle($page);
+        }
+    }
+}

app/CMS/Pipeline/Exceptions/InvalidProcessType.php

@@ -0,0 +1,6 @@
+<?php
+namespace App\CMS\Pipeline\Exceptions;
+
+class InvalidProcessType extends \Exception
+{
+}

app/CMS/Pipeline/Process/AddViewedToPage.php

@@ -0,0 +1,19 @@
+<?php
+namespace App\CMS\Pipeline\Process;
+
+use App\CMS\Contracts\Content\DisplayPipeline\Process;
+use App\Models\Content\Content;
+
+class AddViewedToPage implements Process {
+    /**
+     * Process and modify given page
+     *
+     * @param Content $page
+     *
+     * @return mixed
+     */
+    function handle(Content & $page)
+    {
+        $page->view();
+    }
+}

app/CMS/Pipeline/Process/CompileShortcodes.php

@@ -0,0 +1,19 @@
+<?php
+namespace App\CMS\Pipeline\Process;
+
+use App\CMS\Contracts\Content\DisplayPipeline\Process;
+use App\Models\Content\Content;
+
+class CompileShortcodes implements Process {
+    /**
+     * Process and modify given page
+     *
+     * @param Content $page
+     *
+     * @return mixed
+     */
+    function handle(Content & $page)
+    {
+        // TODO: Implement handle() method.
+    }
+}

app/Http/Controllers/Visitor/ContentPage.php

@@ -3,7 +3,6 @@
 namespace App\Http\Controllers\Visitor;
 
 use App\CMS\Contracts\Repositories\Content;
-use App\CMS\Helpers\PageRenderer;
 use App\Http\Controllers\Controller;
 use App\Models\Content\Content as ContentModel;
 use Illuminate\Support\Facades\Auth;
@@ -24,11 +23,20 @@ class ContentPage extends Controller
         $this->content = $content;
     }
 
+    /**
+     * Load page by URL
+     *
+     * This method also caches content
+     *
+     * @param $url
+     *
+     * @return mixed
+     */
     public function getPage($url)
     {
-        $contentModel = $this->content;
-        $page = Cache::remember('content-' . $url, setting('contentCacheLifetime', 5), function () use ($contentModel, $url) {
-            return $contentModel->getByURL($url);
+        $contentRepository = $this->content;
+        $page = Cache::remember('content-' . $url, setting('contentCacheLifetime', 5), function () use ($contentRepository, $url) {
+            return $contentRepository->getByURL($url);
         });
 
         // no page available
@@ -54,9 +62,10 @@ class ContentPage extends Controller
             abort(404);
         }
 
-        // add one new "view" for page
-        $page->view();
+        $displayPipeline = app('displayPipeline');
+        $page = $displayPipeline->run($page);
+
+        return Controller::VisitorsView($page->template, ['page' => $page]);
 
-        return PageRenderer::render($page);
     }
 }

app/Providers/AppServiceProvider.php

@@ -13,6 +13,9 @@ use App\CMS\Handlers\Search\Content;
 use App\CMS\Handlers\Search\Files;
 use App\CMS\Handlers\Search\Presenters\AdminContent as AdminContentPresenter;
 use App\CMS\Handlers\Search\Presenters\AdminFiles;
+use App\CMS\Pipeline\DisplayPipeline;
+use App\CMS\Pipeline\Process\AddViewedToPage;
+use App\CMS\Pipeline\Process\CompileShortcodes;
 use App\CMS\Repositories\Content\Content as ContentRepository;
 use App\CMS\Repositories\Module as ModuleRepository;
 use App\CMS\Repositories\Templates\Template as TemplateRepository;
@@ -41,6 +44,7 @@ class AppServiceProvider extends ServiceProvider
             $this->registerWidgets();
             $this->registerSettings();
             $this->registerSearch();
+            $this->registerDisplayPipeline();
         }
     }
 
@@ -64,6 +68,11 @@ class AppServiceProvider extends ServiceProvider
             return new WidgetRegistrator($app);
         });
 
+        // create singleton for display pipeline - pipeline used for displaying visitor pages
+        $this->app->singleton('displayPipeline', function ($app) {
+            return new DisplayPipeline();
+        });
+
         // create registrator for template directories
         $this->app->singleton('registerTemplateDir', function ($app) {
             return new TemplateRegistrator($app);
@@ -115,4 +124,12 @@ class AppServiceProvider extends ServiceProvider
         $registrator->register(new Content(), new AdminContentPresenter(), SearchEngineRegistrator::ADMIN);
         $registrator->register(new Files(), new AdminFiles(), SearchEngineRegistrator::ADMIN);
     }
+
+    private function registerDisplayPipeline()
+    {
+        $registrator = $this->app->make('displayPipeline');
+
+        $registrator->add(AddViewedToPage::class);
+        $registrator->add(CompileShortcodes::class);
+    }
 }