nextcloud / server

apps/theming/lib/ThemingDefaults.php

Indentation +389 added lines, -389 removed lines

@@ -51,393 +51,393 @@
 
 class ThemingDefaults extends \OC_Defaults {
 
-	/** @var IConfig */
-	private $config;
-	/** @var IL10N */
-	private $l;
-	/** @var ImageManager */
-	private $imageManager;
-	/** @var IURLGenerator */
-	private $urlGenerator;
-	/** @var ICacheFactory */
-	private $cacheFactory;
-	/** @var Util */
-	private $util;
-	/** @var IAppManager */
-	private $appManager;
-	/** @var INavigationManager */
-	private $navigationManager;
-
-	/** @var string */
-	private $name;
-	/** @var string */
-	private $title;
-	/** @var string */
-	private $entity;
-	/** @var string */
-	private $url;
-	/** @var string */
-	private $color;
-
-	/** @var string */
-	private $iTunesAppId;
-	/** @var string */
-	private $iOSClientUrl;
-	/** @var string */
-	private $AndroidClientUrl;
-
-	/**
-	 * ThemingDefaults constructor.
-	 *
-	 * @param IConfig $config
-	 * @param IL10N $l
-	 * @param ImageManager $imageManager
-	 * @param IURLGenerator $urlGenerator
-	 * @param ICacheFactory $cacheFactory
-	 * @param Util $util
-	 * @param IAppManager $appManager
-	 */
-	public function __construct(IConfig $config,
-								IL10N $l,
-								IURLGenerator $urlGenerator,
-								ICacheFactory $cacheFactory,
-								Util $util,
-								ImageManager $imageManager,
-								IAppManager $appManager,
-								INavigationManager $navigationManager
-	) {
-		parent::__construct();
-		$this->config = $config;
-		$this->l = $l;
-		$this->imageManager = $imageManager;
-		$this->urlGenerator = $urlGenerator;
-		$this->cacheFactory = $cacheFactory;
-		$this->util = $util;
-		$this->appManager = $appManager;
-		$this->navigationManager = $navigationManager;
-
-		$this->name = parent::getName();
-		$this->title = parent::getTitle();
-		$this->entity = parent::getEntity();
-		$this->url = parent::getBaseUrl();
-		$this->color = parent::getColorPrimary();
-		$this->iTunesAppId = parent::getiTunesAppId();
-		$this->iOSClientUrl = parent::getiOSClientUrl();
-		$this->AndroidClientUrl = parent::getAndroidClientUrl();
-	}
-
-	public function getName() {
-		return strip_tags($this->config->getAppValue('theming', 'name', $this->name));
-	}
-
-	public function getHTMLName() {
-		return $this->config->getAppValue('theming', 'name', $this->name);
-	}
-
-	public function getTitle() {
-		return strip_tags($this->config->getAppValue('theming', 'name', $this->title));
-	}
-
-	public function getEntity() {
-		return strip_tags($this->config->getAppValue('theming', 'name', $this->entity));
-	}
-
-	public function getBaseUrl() {
-		return $this->config->getAppValue('theming', 'url', $this->url);
-	}
-
-	public function getSlogan(?string $lang = null) {
-		return \OCP\Util::sanitizeHTML($this->config->getAppValue('theming', 'slogan', parent::getSlogan($lang)));
-	}
-
-	public function getImprintUrl() {
-		return (string)$this->config->getAppValue('theming', 'imprintUrl', '');
-	}
-
-	public function getPrivacyUrl() {
-		return (string)$this->config->getAppValue('theming', 'privacyUrl', '');
-	}
-
-	public function getShortFooter() {
-		$slogan = $this->getSlogan();
-		$baseUrl = $this->getBaseUrl();
-		if ($baseUrl !== '') {
-			$footer = '<a href="' . $baseUrl . '" target="_blank"' .
-				' rel="noreferrer noopener" class="entity-name">' . $this->getEntity() . '</a>';
-		} else {
-			$footer = '<span class="entity-name">' .$this->getEntity() . '</span>';
-		}
-		$footer .= ($slogan !== '' ? ' – ' . $slogan : '');
-
-		$links = [
-			[
-				'text' => $this->l->t('Legal notice'),
-				'url' => (string)$this->getImprintUrl()
-			],
-			[
-				'text' => $this->l->t('Privacy policy'),
-				'url' => (string)$this->getPrivacyUrl()
-			],
-		];
-
-		$navigation = $this->navigationManager->getAll(INavigationManager::TYPE_GUEST);
-		$guestNavigation = array_map(function ($nav) {
-			return [
-				'text' => $nav['name'],
-				'url' => $nav['href']
-			];
-		}, $navigation);
-		$links = array_merge($links, $guestNavigation);
-
-		$legalLinks = '';
-		$divider = '';
-		foreach ($links as $link) {
-			if ($link['url'] !== ''
-				&& filter_var($link['url'], FILTER_VALIDATE_URL)
-			) {
-				$legalLinks .= $divider . '<a href="' . $link['url'] . '" class="legal" target="_blank"' .
-					' rel="noreferrer noopener">' . $link['text'] . '</a>';
-				$divider = ' · ';
-			}
-		}
-		if ($legalLinks !== '') {
-			$footer .= '<br/>' . $legalLinks;
-		}
-
-		return $footer;
-	}
-
-	/**
-	 * Color that is used for the header as well as for mail headers
-	 *
-	 * @return string
-	 */
-	public function getColorPrimary() {
-		return $this->config->getAppValue('theming', 'color', $this->color);
-	}
-
-	/**
-	 * Themed logo url
-	 *
-	 * @param bool $useSvg Whether to point to the SVG image or a fallback
-	 * @return string
-	 */
-	public function getLogo($useSvg = true): string {
-		$logo = $this->config->getAppValue('theming', 'logoMime', false);
-
-		// short cut to avoid setting up the filesystem just to check if the logo is there
-		//
-		// explanation: if an SVG is requested and the app config value for logoMime is set then the logo is there.
-		// otherwise we need to check it and maybe also generate a PNG from the SVG (that's done in getImage() which
-		// needs to be called then)
-		if ($useSvg === true && $logo !== false) {
-			$logoExists = true;
-		} else {
-			try {
-				$this->imageManager->getImage('logo', $useSvg);
-				$logoExists = true;
-			} catch (\Exception $e) {
-				$logoExists = false;
-			}
-		}
-
-		$cacheBusterCounter = $this->config->getAppValue('theming', 'cachebuster', '0');
-
-		if (!$logo || !$logoExists) {
-			if ($useSvg) {
-				$logo = $this->urlGenerator->imagePath('core', 'logo/logo.svg');
-			} else {
-				$logo = $this->urlGenerator->imagePath('core', 'logo/logo.png');
-			}
-			return $logo . '?v=' . $cacheBusterCounter;
-		}
-
-		return $this->urlGenerator->linkToRoute('theming.Theming.getImage', [ 'key' => 'logo', 'useSvg' => $useSvg, 'v' => $cacheBusterCounter ]);
-	}
-
-	/**
-	 * Themed background image url
-	 *
-	 * @return string
-	 */
-	public function getBackground(): string {
-		return $this->imageManager->getImageUrl('background');
-	}
-
-	/**
-	 * @return string
-	 */
-	public function getiTunesAppId() {
-		return $this->config->getAppValue('theming', 'iTunesAppId', $this->iTunesAppId);
-	}
-
-	/**
-	 * @return string
-	 */
-	public function getiOSClientUrl() {
-		return $this->config->getAppValue('theming', 'iOSClientUrl', $this->iOSClientUrl);
-	}
-
-	/**
-	 * @return string
-	 */
-	public function getAndroidClientUrl() {
-		return $this->config->getAppValue('theming', 'AndroidClientUrl', $this->AndroidClientUrl);
-	}
-
-
-	/**
-	 * @return array scss variables to overwrite
-	 */
-	public function getScssVariables() {
-		$cache = $this->cacheFactory->createDistributed('theming-' . $this->urlGenerator->getBaseUrl());
-		if ($value = $cache->get('getScssVariables')) {
-			return $value;
-		}
-
-		$variables = [
-			'theming-cachebuster' => "'" . $this->config->getAppValue('theming', 'cachebuster', '0') . "'",
-			'theming-logo-mime' => "'" . $this->config->getAppValue('theming', 'logoMime') . "'",
-			'theming-background-mime' => "'" . $this->config->getAppValue('theming', 'backgroundMime') . "'",
-			'theming-logoheader-mime' => "'" . $this->config->getAppValue('theming', 'logoheaderMime') . "'",
-			'theming-favicon-mime' => "'" . $this->config->getAppValue('theming', 'faviconMime') . "'"
-		];
-
-		$variables['image-logo'] = "url('".$this->imageManager->getImageUrl('logo')."')";
-		$variables['image-logoheader'] = "url('".$this->imageManager->getImageUrl('logoheader')."')";
-		$variables['image-favicon'] = "url('".$this->imageManager->getImageUrl('favicon')."')";
-		$variables['image-login-background'] = "url('".$this->imageManager->getImageUrl('background')."')";
-		$variables['image-login-plain'] = 'false';
-
-		if ($this->config->getAppValue('theming', 'color', null) !== null) {
-			$variables['color-primary'] = $this->getColorPrimary();
-			$variables['color-primary-text'] = $this->getTextColorPrimary();
-			$variables['color-primary-element'] = $this->util->elementColor($this->getColorPrimary());
-		}
-
-		if ($this->config->getAppValue('theming', 'backgroundMime', null) === 'backgroundColor') {
-			$variables['image-login-plain'] = 'true';
-		}
-
-		$variables['has-legal-links'] = 'false';
-		if ($this->getImprintUrl() !== '' || $this->getPrivacyUrl() !== '') {
-			$variables['has-legal-links'] = 'true';
-		}
-
-		$cache->set('getScssVariables', $variables);
-		return $variables;
-	}
-
-	/**
-	 * Check if the image should be replaced by the theming app
-	 * and return the new image location then
-	 *
-	 * @param string $app name of the app
-	 * @param string $image filename of the image
-	 * @return bool|string false if image should not replaced, otherwise the location of the image
-	 */
-	public function replaceImagePath($app, $image) {
-		if ($app === '' || $app === 'files_sharing') {
-			$app = 'core';
-		}
-		$cacheBusterValue = $this->config->getAppValue('theming', 'cachebuster', '0');
-
-		try {
-			$customFavicon = $this->imageManager->getImage('favicon');
-		} catch (NotFoundException $e) {
-			$customFavicon = null;
-		}
-
-		$route = false;
-		if ($image === 'favicon.ico' && ($customFavicon !== null || $this->imageManager->shouldReplaceIcons())) {
-			$route = $this->urlGenerator->linkToRoute('theming.Icon.getFavicon', ['app' => $app]);
-		}
-		if (($image === 'favicon-touch.png' || $image === 'favicon-fb.png') && ($customFavicon !== null || $this->imageManager->shouldReplaceIcons())) {
-			$route = $this->urlGenerator->linkToRoute('theming.Icon.getTouchIcon', ['app' => $app]);
-		}
-		if ($image === 'manifest.json') {
-			try {
-				$appPath = $this->appManager->getAppPath($app);
-				if (file_exists($appPath . '/img/manifest.json')) {
-					return false;
-				}
-			} catch (AppPathNotFoundException $e) {
-			}
-			$route = $this->urlGenerator->linkToRoute('theming.Theming.getManifest');
-		}
-		if (strpos($image, 'filetypes/') === 0 && file_exists(\OC::$SERVERROOT . '/core/img/' . $image)) {
-			$route = $this->urlGenerator->linkToRoute('theming.Icon.getThemedIcon', ['app' => $app, 'image' => $image]);
-		}
-
-		if ($route) {
-			return $route . '?v=' . $cacheBusterValue;
-		}
-
-		return false;
-	}
-
-	/**
-	 * Increases the cache buster key
-	 */
-	private function increaseCacheBuster() {
-		$cacheBusterKey = $this->config->getAppValue('theming', 'cachebuster', '0');
-		$this->config->setAppValue('theming', 'cachebuster', (int)$cacheBusterKey + 1);
-		$this->cacheFactory->createDistributed('theming-')->clear();
-		$this->cacheFactory->createDistributed('imagePath')->clear();
-	}
-
-	/**
-	 * Update setting in the database
-	 *
-	 * @param string $setting
-	 * @param string $value
-	 */
-	public function set($setting, $value) {
-		$this->config->setAppValue('theming', $setting, $value);
-		$this->increaseCacheBuster();
-	}
-
-	/**
-	 * Revert settings to the default value
-	 *
-	 * @param string $setting setting which should be reverted
-	 * @return string default value
-	 */
-	public function undo($setting) {
-		$this->config->deleteAppValue('theming', $setting);
-		$this->increaseCacheBuster();
-
-		$returnValue = '';
-		switch ($setting) {
-			case 'name':
-				$returnValue = $this->getEntity();
-				break;
-			case 'url':
-				$returnValue = $this->getBaseUrl();
-				break;
-			case 'slogan':
-				$returnValue = $this->getSlogan();
-				break;
-			case 'color':
-				$returnValue = $this->getColorPrimary();
-				break;
-			case 'logo':
-			case 'logoheader':
-			case 'background':
-			case 'favicon':
-				$this->imageManager->delete($setting);
-				break;
-		}
-
-		return $returnValue;
-	}
-
-	/**
-	 * Color of text in the header and primary buttons
-	 *
-	 * @return string
-	 */
-	public function getTextColorPrimary() {
-		return $this->util->invertTextColor($this->getColorPrimary()) ? '#000000' : '#ffffff';
-	}
+    /** @var IConfig */
+    private $config;
+    /** @var IL10N */
+    private $l;
+    /** @var ImageManager */
+    private $imageManager;
+    /** @var IURLGenerator */
+    private $urlGenerator;
+    /** @var ICacheFactory */
+    private $cacheFactory;
+    /** @var Util */
+    private $util;
+    /** @var IAppManager */
+    private $appManager;
+    /** @var INavigationManager */
+    private $navigationManager;
+
+    /** @var string */
+    private $name;
+    /** @var string */
+    private $title;
+    /** @var string */
+    private $entity;
+    /** @var string */
+    private $url;
+    /** @var string */
+    private $color;
+
+    /** @var string */
+    private $iTunesAppId;
+    /** @var string */
+    private $iOSClientUrl;
+    /** @var string */
+    private $AndroidClientUrl;
+
+    /**
+     * ThemingDefaults constructor.
+     *
+     * @param IConfig $config
+     * @param IL10N $l
+     * @param ImageManager $imageManager
+     * @param IURLGenerator $urlGenerator
+     * @param ICacheFactory $cacheFactory
+     * @param Util $util
+     * @param IAppManager $appManager
+     */
+    public function __construct(IConfig $config,
+                                IL10N $l,
+                                IURLGenerator $urlGenerator,
+                                ICacheFactory $cacheFactory,
+                                Util $util,
+                                ImageManager $imageManager,
+                                IAppManager $appManager,
+                                INavigationManager $navigationManager
+    ) {
+        parent::__construct();
+        $this->config = $config;
+        $this->l = $l;
+        $this->imageManager = $imageManager;
+        $this->urlGenerator = $urlGenerator;
+        $this->cacheFactory = $cacheFactory;
+        $this->util = $util;
+        $this->appManager = $appManager;
+        $this->navigationManager = $navigationManager;
+
+        $this->name = parent::getName();
+        $this->title = parent::getTitle();
+        $this->entity = parent::getEntity();
+        $this->url = parent::getBaseUrl();
+        $this->color = parent::getColorPrimary();
+        $this->iTunesAppId = parent::getiTunesAppId();
+        $this->iOSClientUrl = parent::getiOSClientUrl();
+        $this->AndroidClientUrl = parent::getAndroidClientUrl();
+    }
+
+    public function getName() {
+        return strip_tags($this->config->getAppValue('theming', 'name', $this->name));
+    }
+
+    public function getHTMLName() {
+        return $this->config->getAppValue('theming', 'name', $this->name);
+    }
+
+    public function getTitle() {
+        return strip_tags($this->config->getAppValue('theming', 'name', $this->title));
+    }
+
+    public function getEntity() {
+        return strip_tags($this->config->getAppValue('theming', 'name', $this->entity));
+    }
+
+    public function getBaseUrl() {
+        return $this->config->getAppValue('theming', 'url', $this->url);
+    }
+
+    public function getSlogan(?string $lang = null) {
+        return \OCP\Util::sanitizeHTML($this->config->getAppValue('theming', 'slogan', parent::getSlogan($lang)));
+    }
+
+    public function getImprintUrl() {
+        return (string)$this->config->getAppValue('theming', 'imprintUrl', '');
+    }
+
+    public function getPrivacyUrl() {
+        return (string)$this->config->getAppValue('theming', 'privacyUrl', '');
+    }
+
+    public function getShortFooter() {
+        $slogan = $this->getSlogan();
+        $baseUrl = $this->getBaseUrl();
+        if ($baseUrl !== '') {
+            $footer = '<a href="' . $baseUrl . '" target="_blank"' .
+                ' rel="noreferrer noopener" class="entity-name">' . $this->getEntity() . '</a>';
+        } else {
+            $footer = '<span class="entity-name">' .$this->getEntity() . '</span>';
+        }
+        $footer .= ($slogan !== '' ? ' – ' . $slogan : '');
+
+        $links = [
+            [
+                'text' => $this->l->t('Legal notice'),
+                'url' => (string)$this->getImprintUrl()
+            ],
+            [
+                'text' => $this->l->t('Privacy policy'),
+                'url' => (string)$this->getPrivacyUrl()
+            ],
+        ];
+
+        $navigation = $this->navigationManager->getAll(INavigationManager::TYPE_GUEST);
+        $guestNavigation = array_map(function ($nav) {
+            return [
+                'text' => $nav['name'],
+                'url' => $nav['href']
+            ];
+        }, $navigation);
+        $links = array_merge($links, $guestNavigation);
+
+        $legalLinks = '';
+        $divider = '';
+        foreach ($links as $link) {
+            if ($link['url'] !== ''
+                && filter_var($link['url'], FILTER_VALIDATE_URL)
+            ) {
+                $legalLinks .= $divider . '<a href="' . $link['url'] . '" class="legal" target="_blank"' .
+                    ' rel="noreferrer noopener">' . $link['text'] . '</a>';
+                $divider = ' · ';
+            }
+        }
+        if ($legalLinks !== '') {
+            $footer .= '<br/>' . $legalLinks;
+        }
+
+        return $footer;
+    }
+
+    /**
+     * Color that is used for the header as well as for mail headers
+     *
+     * @return string
+     */
+    public function getColorPrimary() {
+        return $this->config->getAppValue('theming', 'color', $this->color);
+    }
+
+    /**
+     * Themed logo url
+     *
+     * @param bool $useSvg Whether to point to the SVG image or a fallback
+     * @return string
+     */
+    public function getLogo($useSvg = true): string {
+        $logo = $this->config->getAppValue('theming', 'logoMime', false);
+
+        // short cut to avoid setting up the filesystem just to check if the logo is there
+        //
+        // explanation: if an SVG is requested and the app config value for logoMime is set then the logo is there.
+        // otherwise we need to check it and maybe also generate a PNG from the SVG (that's done in getImage() which
+        // needs to be called then)
+        if ($useSvg === true && $logo !== false) {
+            $logoExists = true;
+        } else {
+            try {
+                $this->imageManager->getImage('logo', $useSvg);
+                $logoExists = true;
+            } catch (\Exception $e) {
+                $logoExists = false;
+            }
+        }
+
+        $cacheBusterCounter = $this->config->getAppValue('theming', 'cachebuster', '0');
+
+        if (!$logo || !$logoExists) {
+            if ($useSvg) {
+                $logo = $this->urlGenerator->imagePath('core', 'logo/logo.svg');
+            } else {
+                $logo = $this->urlGenerator->imagePath('core', 'logo/logo.png');
+            }
+            return $logo . '?v=' . $cacheBusterCounter;
+        }
+
+        return $this->urlGenerator->linkToRoute('theming.Theming.getImage', [ 'key' => 'logo', 'useSvg' => $useSvg, 'v' => $cacheBusterCounter ]);
+    }
+
+    /**
+     * Themed background image url
+     *
+     * @return string
+     */
+    public function getBackground(): string {
+        return $this->imageManager->getImageUrl('background');
+    }
+
+    /**
+     * @return string
+     */
+    public function getiTunesAppId() {
+        return $this->config->getAppValue('theming', 'iTunesAppId', $this->iTunesAppId);
+    }
+
+    /**
+     * @return string
+     */
+    public function getiOSClientUrl() {
+        return $this->config->getAppValue('theming', 'iOSClientUrl', $this->iOSClientUrl);
+    }
+
+    /**
+     * @return string
+     */
+    public function getAndroidClientUrl() {
+        return $this->config->getAppValue('theming', 'AndroidClientUrl', $this->AndroidClientUrl);
+    }
+
+
+    /**
+     * @return array scss variables to overwrite
+     */
+    public function getScssVariables() {
+        $cache = $this->cacheFactory->createDistributed('theming-' . $this->urlGenerator->getBaseUrl());
+        if ($value = $cache->get('getScssVariables')) {
+            return $value;
+        }
+
+        $variables = [
+            'theming-cachebuster' => "'" . $this->config->getAppValue('theming', 'cachebuster', '0') . "'",
+            'theming-logo-mime' => "'" . $this->config->getAppValue('theming', 'logoMime') . "'",
+            'theming-background-mime' => "'" . $this->config->getAppValue('theming', 'backgroundMime') . "'",
+            'theming-logoheader-mime' => "'" . $this->config->getAppValue('theming', 'logoheaderMime') . "'",
+            'theming-favicon-mime' => "'" . $this->config->getAppValue('theming', 'faviconMime') . "'"
+        ];
+
+        $variables['image-logo'] = "url('".$this->imageManager->getImageUrl('logo')."')";
+        $variables['image-logoheader'] = "url('".$this->imageManager->getImageUrl('logoheader')."')";
+        $variables['image-favicon'] = "url('".$this->imageManager->getImageUrl('favicon')."')";
+        $variables['image-login-background'] = "url('".$this->imageManager->getImageUrl('background')."')";
+        $variables['image-login-plain'] = 'false';
+
+        if ($this->config->getAppValue('theming', 'color', null) !== null) {
+            $variables['color-primary'] = $this->getColorPrimary();
+            $variables['color-primary-text'] = $this->getTextColorPrimary();
+            $variables['color-primary-element'] = $this->util->elementColor($this->getColorPrimary());
+        }
+
+        if ($this->config->getAppValue('theming', 'backgroundMime', null) === 'backgroundColor') {
+            $variables['image-login-plain'] = 'true';
+        }
+
+        $variables['has-legal-links'] = 'false';
+        if ($this->getImprintUrl() !== '' || $this->getPrivacyUrl() !== '') {
+            $variables['has-legal-links'] = 'true';
+        }
+
+        $cache->set('getScssVariables', $variables);
+        return $variables;
+    }
+
+    /**
+     * Check if the image should be replaced by the theming app
+     * and return the new image location then
+     *
+     * @param string $app name of the app
+     * @param string $image filename of the image
+     * @return bool|string false if image should not replaced, otherwise the location of the image
+     */
+    public function replaceImagePath($app, $image) {
+        if ($app === '' || $app === 'files_sharing') {
+            $app = 'core';
+        }
+        $cacheBusterValue = $this->config->getAppValue('theming', 'cachebuster', '0');
+
+        try {
+            $customFavicon = $this->imageManager->getImage('favicon');
+        } catch (NotFoundException $e) {
+            $customFavicon = null;
+        }
+
+        $route = false;
+        if ($image === 'favicon.ico' && ($customFavicon !== null || $this->imageManager->shouldReplaceIcons())) {
+            $route = $this->urlGenerator->linkToRoute('theming.Icon.getFavicon', ['app' => $app]);
+        }
+        if (($image === 'favicon-touch.png' || $image === 'favicon-fb.png') && ($customFavicon !== null || $this->imageManager->shouldReplaceIcons())) {
+            $route = $this->urlGenerator->linkToRoute('theming.Icon.getTouchIcon', ['app' => $app]);
+        }
+        if ($image === 'manifest.json') {
+            try {
+                $appPath = $this->appManager->getAppPath($app);
+                if (file_exists($appPath . '/img/manifest.json')) {
+                    return false;
+                }
+            } catch (AppPathNotFoundException $e) {
+            }
+            $route = $this->urlGenerator->linkToRoute('theming.Theming.getManifest');
+        }
+        if (strpos($image, 'filetypes/') === 0 && file_exists(\OC::$SERVERROOT . '/core/img/' . $image)) {
+            $route = $this->urlGenerator->linkToRoute('theming.Icon.getThemedIcon', ['app' => $app, 'image' => $image]);
+        }
+
+        if ($route) {
+            return $route . '?v=' . $cacheBusterValue;
+        }
+
+        return false;
+    }
+
+    /**
+     * Increases the cache buster key
+     */
+    private function increaseCacheBuster() {
+        $cacheBusterKey = $this->config->getAppValue('theming', 'cachebuster', '0');
+        $this->config->setAppValue('theming', 'cachebuster', (int)$cacheBusterKey + 1);
+        $this->cacheFactory->createDistributed('theming-')->clear();
+        $this->cacheFactory->createDistributed('imagePath')->clear();
+    }
+
+    /**
+     * Update setting in the database
+     *
+     * @param string $setting
+     * @param string $value
+     */
+    public function set($setting, $value) {
+        $this->config->setAppValue('theming', $setting, $value);
+        $this->increaseCacheBuster();
+    }
+
+    /**
+     * Revert settings to the default value
+     *
+     * @param string $setting setting which should be reverted
+     * @return string default value
+     */
+    public function undo($setting) {
+        $this->config->deleteAppValue('theming', $setting);
+        $this->increaseCacheBuster();
+
+        $returnValue = '';
+        switch ($setting) {
+            case 'name':
+                $returnValue = $this->getEntity();
+                break;
+            case 'url':
+                $returnValue = $this->getBaseUrl();
+                break;
+            case 'slogan':
+                $returnValue = $this->getSlogan();
+                break;
+            case 'color':
+                $returnValue = $this->getColorPrimary();
+                break;
+            case 'logo':
+            case 'logoheader':
+            case 'background':
+            case 'favicon':
+                $this->imageManager->delete($setting);
+                break;
+        }
+
+        return $returnValue;
+    }
+
+    /**
+     * Color of text in the header and primary buttons
+     *
+     * @return string
+     */
+    public function getTextColorPrimary() {
+        return $this->util->invertTextColor($this->getColorPrimary()) ? '#000000' : '#ffffff';
+    }
 }