refactor: add phpstan and update code to adhere to level 5

- move and refactor Image.php from Libraries to Entities folder
- update some database field names
/ types
- update composer packages

app/Controllers/Admin/PageController.php

@@ -0,0 +1,115 @@
+<?php
+
+/**
+ * @copyright  2020 Podlibre
+ * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
+ * @link       https://castopod.org/
+ */
+
+namespace App\Controllers\Admin;
+
+use App\Entities\Page;
+use CodeIgniter\Exceptions\PageNotFoundException;
+use App\Models\PageModel;
+
+class PageController extends BaseController
+{
+    /**
+     * @var Page|null
+     */
+    protected $page;
+
+    public function _remap($method, ...$params)
+    {
+        if (count($params) === 0) {
+            return $this->$method();
+        }
+
+        if ($this->page = (new PageModel())->find($params[0])) {
+            return $this->$method();
+        }
+
+        throw PageNotFoundException::forPageNotFound();
+    }
+
+    function list()
+    {
+        $data = [
+            'pages' => (new PageModel())->findAll(),
+        ];
+
+        return view('admin/page/list', $data);
+    }
+
+    function view()
+    {
+        return view('admin/page/view', ['page' => $this->page]);
+    }
+
+    function create()
+    {
+        helper('form');
+
+        return view('admin/page/create');
+    }
+
+    function attemptCreate()
+    {
+        $page = new Page([
+            'title' => $this->request->getPost('title'),
+            'slug' => $this->request->getPost('slug'),
+            'content_markdown' => $this->request->getPost('content'),
+        ]);
+
+        $pageModel = new PageModel();
+
+        if (!$pageModel->insert($page)) {
+            return redirect()
+                ->back()
+                ->withInput()
+                ->with('errors', $pageModel->errors());
+        }
+
+        return redirect()
+            ->route('page-list')
+            ->with(
+                'message',
+                lang('Page.messages.createSuccess', [
+                    'pageTitle' => $page->title,
+                ]),
+            );
+    }
+
+    function edit()
+    {
+        helper('form');
+
+        replace_breadcrumb_params([0 => $this->page->title]);
+        return view('admin/page/edit', ['page' => $this->page]);
+    }
+
+    function attemptEdit()
+    {
+        $this->page->title = $this->request->getPost('title');
+        $this->page->slug = $this->request->getPost('slug');
+        $this->page->content_markdown = $this->request->getPost('content');
+
+        $pageModel = new PageModel();
+
+        if (!$pageModel->update($this->page->id, $this->page)) {
+            return redirect()
+                ->back()
+                ->withInput()
+                ->with('errors', $pageModel->errors());
+        }
+
+        return redirect()->route('page-list');
+    }
+
+    public function delete()
+    {
+        (new PageModel())->delete($this->page->id);
+
+        return redirect()->route('page-list');
+    }
+}