Move admin summary to src/Module

- Add BaseAdminModule class
- Add Module\Admin\Summary class
- Add Route for Admin\Summary module
- Remove admin_page_summary() in mod/admin
- Remove $showwarning variable from admin/summary.tpl

src/Module/BaseAdminModule.php

@@ -0,0 +1,74 @@
+<?php
+
+namespace Friendica\Module;
+
+use Friendica\BaseModule;
+use Friendica\Core\L10n;
+use Friendica\Core\Renderer;
+use Friendica\Database\DBA;
+
+class BaseAdminModule extends BaseModule
+{
+	public static function post()
+	{
+		if (!is_site_admin()) {
+			return;
+		}
+
+		// do not allow a page manager to access the admin panel at all.
+		if (!empty($_SESSION['submanage'])) {
+			return;
+		}
+	}
+
+	public static function content()
+	{
+		if (!is_site_admin()) {
+			return Login::form();
+		}
+
+		if (!empty($_SESSION['submanage'])) {
+			return '';
+		}
+
+		$a = self::getApp();
+
+		// APC deactivated, since there are problems with PHP 5.5
+		//if (function_exists("apc_delete")) {
+		// $toDelete = new APCIterator('user', APC_ITER_VALUE);
+		// apc_delete($toDelete);
+		//}
+		// Header stuff
+		$a->page['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('admin/settings_head.tpl'), []);
+
+		/*
+		 * Side bar links
+		 */
+
+		// array(url, name, extra css classes)
+		// not part of $aside to make the template more adjustable
+		$aside_sub = [
+			'information' => [L10n::t('Information'), [
+				'overview'     => ['admin'             , L10n::t('Overview')                , 'overview'],
+			]],
+		];
+
+		$addons_admin = [];
+		$addonsAdminStmt = DBA::select('addon', ['name'], ['plugin_admin' => 1], ['order' => ['name']]);
+		foreach (DBA::toArray($addonsAdminStmt) as $addon) {
+			$addons_admin[] = ['admin/addons/' . $addon['name'], $addon['name'], 'addon'];
+		}
+
+		$t = Renderer::getMarkupTemplate('admin/aside.tpl');
+		$a->page['aside'] .= Renderer::replaceMacros($t, [
+			'$admin' => ['addons_admin' => $addons_admin],
+			'$subpages' => $aside_sub,
+			'$admtxt' => L10n::t('Admin'),
+			'$plugadmtxt' => L10n::t('Addon Features'),
+			'$h_pending' => L10n::t('User registrations waiting for confirmation'),
+			'$admurl' => 'admin/'
+		]);
+
+		return '';
+	}
+}