server/apps/theming/lib/Settings/Admin.php

<?php
/**
 * @copyright Copyright (c) 2016 Arthur Schiwon <blizzz@arthur-schiwon.de>
 *
 * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

namespace OCA\Theming\Settings;

use OCA\Theming\ThemingDefaults;
use OCP\AppFramework\Http\TemplateResponse;
use OCP\IConfig;
use OCP\IL10N;
use OCP\IURLGenerator;
use OCP\Settings\ISettings;

class Admin implements ISettings {
	/** @var IConfig */
	private $config;
	/** @var IL10N */
	private $l;
	/** @var ThemingDefaults */
	private $themingDefaults;
	/** @var IURLGenerator */
	private $urlGenerator;

	public function __construct(IConfig $config,
								IL10N $l,
								ThemingDefaults $themingDefaults,
								IURLGenerator $urlGenerator) {
		$this->config = $config;
		$this->l = $l;
		$this->themingDefaults = $themingDefaults;
		$this->urlGenerator = $urlGenerator;
	}

	/**
	 * @return TemplateResponse
	 */
	public function getForm() {
		$path = $this->urlGenerator->linkToRoute('theming.Theming.updateLogo');

		$themable = true;
		$errorMessage = '';
		$theme = $this->config->getSystemValue('theme', '');
		if ($theme !== '') {
			$themable = false;
			$errorMessage = $this->l->t('You are already using a custom theme');
		}

		$parameters = [
			'themable'        => $themable,
			'errorMessage'    => $errorMessage,
			'name'            => $this->themingDefaults->getEntity(),
			'url'             => $this->themingDefaults->getBaseUrl(),
			'slogan'          => $this->themingDefaults->getSlogan(),
			'color'           => $this->themingDefaults->getMailHeaderColor(),
			'logo'            => $this->themingDefaults->getLogo(),
			'logoMime'        => $this->config->getAppValue('theming', 'logoMime', ''),
			'background'      => $this->themingDefaults->getBackground(),
			'backgroundMime'  => $this->config->getAppValue('theming', 'backgroundMime', ''),
			'uploadLogoRoute' => $path,
		];

		return new TemplateResponse('theming', 'settings-admin', $parameters, '');
	}

	/**
	 * @return string the section ID, e.g. 'sharing'
	 */
	public function getSection() {
		return 'theming';
	}

	/**
	 * @return int whether the form should be rather on the top or bottom of
	 * the admin section. The forms are arranged in ascending order of the
	 * priority values. It is required to return a value between 0 and 100.
	 *
	 * E.g.: 70
	 */
	public function getPriority() {
		return 5;
	}

}