FEATURE: add registering for new search engines.

app/Handlers/Contracts/SearchHandler.php

@@ -0,0 +1,17 @@
+<?php
+namespace App\Handlers\Contracts;
+
+interface SearchHandler {
+    public function getId();
+
+    public function getName();
+
+    /**
+     * Search for given patttern/term
+     *
+     * @param string $term searched word
+     *
+     * @return array list of found objects
+     */
+    public function search($term);
+}

app/Handlers/Contracts/SearchPresenterHandler.php

@@ -0,0 +1,14 @@
+<?php
+namespace App\Handlers\Contracts;
+
+interface SearchPresenterHandler
+{
+    /**
+     * Method for rendering list of found results
+     *
+     * @param $foundItems
+     *
+     * @return mixed
+     */
+    public function render($foundItems);
+}

app/Handlers/Registrators/SearchEngineRegistrator.php

@@ -0,0 +1,57 @@
+<?php
+namespace App\Handlers\Registrators;
+
+use App\Enumerations\Exceptions\EnumerationExistsException;
+use App\Handlers\Contracts\SearchHandler;
+use App\Handlers\Contracts\SearchPresenterHandler;
+use App\Handlers\Registrators\Items\SearchEngine;
+
+class SearchEngineRegistrator
+{
+    protected $searchEngines;
+
+    function __construct($app)
+    {
+        $this->searchEngines = [];
+    }
+
+    /**
+     * Method for registering new settings extensions/parts
+     *
+     * @param SearchHandler          $search
+     * @param SearchPresenterHandler $presenter
+     *
+     * @throws EnumerationExistsException
+     */
+    public function register(SearchHandler $search, SearchPresenterHandler $presenter)
+    {
+        $this->checkIfRegistered($search->getId());
+
+        // register new extension
+        $this->searchEngines[$search->getId()] = [$search, $presenter];
+    }
+
+    /**
+     * Getter for all registered extensions
+     *
+     * @return array
+     */
+    public function get()
+    {
+        return $this->searchEngines;
+    }
+
+    /**
+     * Checks if this section is not already defined
+     *
+     * @param $id
+     *
+     * @throws EnumerationExistsException
+     */
+    private function checkIfRegistered($id)
+    {
+        if (isset($this->searchEngines[$id])) {
+            throw new EnumerationExistsException('Already existing search engine ' . $id);
+        }
+    }
+}

app/Handlers/Search/Content.php

@@ -0,0 +1,36 @@
+<?php
+namespace App\Handlers\Search;
+
+use App\Handlers\Contracts\SearchHandler;
+
+class Content implements SearchHandler
+{
+    /**
+     * Search for given patttern/term
+     *
+     * @param string $term searched word
+     *
+     * @return array list of found objects
+     */
+    public function search($term)
+    {
+        $token = '%' . $term . '%';
+
+        return Content::where('content', 'LIKE', $token)
+                      ->orWhere('description', 'LIKE', $token)
+                      ->orWhere('keywords', 'LIKE', $token)
+                      ->orWhere('title', 'LIKE', $token)
+                      ->orWhere('url', 'LIKE', $token)
+                      ->get();
+    }
+
+    public function getId()
+    {
+        return 'content';
+    }
+
+    public function getName()
+    {
+        return trans('...');
+    }
+}

app/Handlers/Search/Presenters/Content.php

@@ -0,0 +1,12 @@
+<?php
+namespace App\Handlers\Search\Presenters;
+
+use App\Handlers\Contracts\SearchPresenterHandler;
+
+class Content implements SearchPresenterHandler
+{
+    public function render($foundItems)
+    {
+        var_dump($foundItems);
+    }
+}

app/Providers/AppServiceProvider.php

@@ -2,9 +2,12 @@
 
 namespace App\Providers;
 
+use App\Handlers\Registrators\SearchEngineRegistrator;
 use App\Handlers\Registrators\SettingsExtensionRegistrator;
 use App\Handlers\Registrators\TemplateRegistrator;
 use App\Handlers\Registrators\WidgetRegistrator;
+use App\Handlers\Search\Content;
+use App\Handlers\Search\Presenters\Content as ContentPresenter;
 use App\Widgets\HtmlCode\HtmlCode;
 use Illuminate\Support\ServiceProvider;
 
@@ -20,6 +23,7 @@ class AppServiceProvider extends ServiceProvider
         $this->registerWidgets();
         $this->registerTemplates();
         $this->registerSettings();
+        $this->registerSearch();
     }
 
     /**
@@ -51,6 +55,10 @@ class AppServiceProvider extends ServiceProvider
         $this->app->singleton('registerSettingsExtension', function ($app) {
             return new SettingsExtensionRegistrator($app);
         });
+
+        $this->app->singleton('registerSearchEngine', function ($app) {
+            return new SearchEngineRegistrator($app);
+        });
     }
 
     /**
@@ -91,4 +99,14 @@ class AppServiceProvider extends ServiceProvider
         $registrator->register('basic', 'admin/settings.basic', 'admin.settings.parts.basic');
         $registrator->register('meta', 'admin/settings.meta', 'admin.settings.parts.meta');
     }
+
+    /**
+     * Register callbacks used for searching
+     */
+    private function registerSearch()
+    {
+        $registrator = $this->app->make('registerSearchEngine');
+
+        $registrator->register(new Content(), new ContentPresenter());
+    }
 }