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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * VuFind Theme Initializer |
| 5 | * |
| 6 | * PHP version 8 |
| 7 | * |
| 8 | * Copyright (C) Villanova University 2010. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2, |
| 12 | * as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | * |
| 23 | * @category VuFind |
| 24 | * @package Theme |
| 25 | * @author Demian Katz <demian.katz@villanova.edu> |
| 26 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
| 27 | * @link https://vufind.org Main Site |
| 28 | */ |
| 29 | |
| 30 | namespace VuFindTheme; |
| 31 | |
| 32 | use Laminas\Config\Config; |
| 33 | use Laminas\Mvc\MvcEvent; |
| 34 | use Laminas\Stdlib\RequestInterface as Request; |
| 35 | use Laminas\View\Resolver\TemplatePathStack; |
| 36 | use Psr\Container\ContainerInterface; |
| 37 | |
| 38 | /** |
| 39 | * VuFind Theme Initializer |
| 40 | * |
| 41 | * @category VuFind |
| 42 | * @package Theme |
| 43 | * @author Demian Katz <demian.katz@villanova.edu> |
| 44 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
| 45 | * @link https://vufind.org Main Site |
| 46 | */ |
| 47 | class Initializer |
| 48 | { |
| 49 | /** |
| 50 | * Theme configuration object |
| 51 | * |
| 52 | * @var Config |
| 53 | */ |
| 54 | protected $config; |
| 55 | |
| 56 | /** |
| 57 | * Laminas MVC Event |
| 58 | * |
| 59 | * @var MvcEvent |
| 60 | */ |
| 61 | protected $event; |
| 62 | |
| 63 | /** |
| 64 | * Top-level service container |
| 65 | * |
| 66 | * @var \Psr\Container\ContainerInterface |
| 67 | */ |
| 68 | protected $serviceManager; |
| 69 | |
| 70 | /** |
| 71 | * Theme tools object |
| 72 | * |
| 73 | * @var \VuFindTheme\ThemeInfo |
| 74 | */ |
| 75 | protected $tools; |
| 76 | |
| 77 | /** |
| 78 | * Mobile interface detector |
| 79 | * |
| 80 | * @var \VuFindTheme\Mobile |
| 81 | */ |
| 82 | protected $mobile; |
| 83 | |
| 84 | /** |
| 85 | * Cookie manager |
| 86 | * |
| 87 | * @var \VuFind\Cookie\CookieManager |
| 88 | */ |
| 89 | protected $cookieManager; |
| 90 | |
| 91 | /** |
| 92 | * A static flag used to determine if the theme has been initialized |
| 93 | * |
| 94 | * @var bool |
| 95 | */ |
| 96 | protected static $themeInitialized = false; |
| 97 | |
| 98 | /** |
| 99 | * Constructor |
| 100 | * |
| 101 | * @param Config $config Configuration object |
| 102 | * containing these keys: |
| 103 | * <ul> |
| 104 | * <li>theme - the name of the default theme for non-mobile devices</li> |
| 105 | * <li>mobile_theme - the name of the default theme for mobile devices |
| 106 | * (omit to disable mobile support)</li> |
| 107 | * <li>alternate_themes - a comma-separated list of alternate themes that |
| 108 | * can be accessed via the ui GET parameter; each entry is a colon-separated |
| 109 | * parameter-value:theme-name pair.</li> |
| 110 | * <li>selectable_themes - a comma-separated list of themes that may be |
| 111 | * selected through the user interface; each entry is a colon-separated |
| 112 | * name:description pair, where name may be 'standard,' 'mobile,' or one of |
| 113 | * the parameter-values from the alternate_themes array.</li> |
| 114 | * <li>generator - a Generator value to display in the HTML header |
| 115 | * (optional)</li> |
| 116 | * </ul> |
| 117 | * @param MvcEvent|ContainerInterface $eventOrContainer Laminas MVC Event object |
| 118 | * OR service container object |
| 119 | */ |
| 120 | public function __construct(Config $config, $eventOrContainer) |
| 121 | { |
| 122 | // Store parameters: |
| 123 | $this->config = $config; |
| 124 | |
| 125 | if ($eventOrContainer instanceof MvcEvent) { |
| 126 | $this->event = $eventOrContainer; |
| 127 | $this->serviceManager = $this->event->getApplication() |
| 128 | ->getServiceManager(); |
| 129 | } elseif ($eventOrContainer instanceof ContainerInterface) { |
| 130 | $this->event = null; |
| 131 | $this->serviceManager = $eventOrContainer; |
| 132 | } else { |
| 133 | throw new \Exception( |
| 134 | 'Illegal type for $eventOrContainer: ' . $eventOrContainer::class |
| 135 | ); |
| 136 | } |
| 137 | |
| 138 | // Get the cookie manager from the service manager: |
| 139 | $this->cookieManager = $this->serviceManager |
| 140 | ->get(\VuFind\Cookie\CookieManager::class); |
| 141 | |
| 142 | // Get base directory from tools object: |
| 143 | $this->tools = $this->serviceManager->get(\VuFindTheme\ThemeInfo::class); |
| 144 | |
| 145 | // Set up mobile device detector: |
| 146 | $this->mobile = $this->serviceManager->get(\VuFindTheme\Mobile::class); |
| 147 | $this->mobile->enable(isset($this->config->mobile_theme)); |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Initialize the theme. This needs to be triggered as part of the dispatch |
| 152 | * event. |
| 153 | * |
| 154 | * @throws \Exception |
| 155 | * @return void |
| 156 | */ |
| 157 | public function init() |
| 158 | { |
| 159 | // Make sure to initialize the theme just once |
| 160 | if (self::$themeInitialized) { |
| 161 | return; |
| 162 | } |
| 163 | self::$themeInitialized = true; |
| 164 | |
| 165 | // Determine the current theme: |
| 166 | $currentTheme = $this->pickTheme( |
| 167 | isset($this->event) ? $this->event->getRequest() : null |
| 168 | ); |
| 169 | |
| 170 | // Determine theme options: |
| 171 | $this->sendThemeOptionsToView($currentTheme); |
| 172 | |
| 173 | // Make sure the current theme is set correctly in the tools object: |
| 174 | $error = null; |
| 175 | try { |
| 176 | $this->tools->setTheme($currentTheme); |
| 177 | } catch (\Exception $error) { |
| 178 | // If an illegal value is passed in, the setter may throw an exception. |
| 179 | // We should ignore it for now and throw it after we have set up the |
| 180 | // theme (the setter will use a safe value instead of the illegal one). |
| 181 | } |
| 182 | |
| 183 | // Using the settings we initialized above, actually configure the themes; we |
| 184 | // need to do this even if there is an error, since we need a theme in order |
| 185 | // to display an error message! |
| 186 | $this->setUpThemes(array_reverse($this->tools->getThemeInfo())); |
| 187 | |
| 188 | // If we encountered an error loading theme settings, fail now. |
| 189 | if (isset($error)) { |
| 190 | throw new \Exception($error->getMessage()); |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * Support method for init() -- figure out which theme option is active. |
| 196 | * |
| 197 | * @param Request $request Request object (for obtaining user parameters); |
| 198 | * set to null if no request context is available. |
| 199 | * |
| 200 | * @return string |
| 201 | */ |
| 202 | protected function pickTheme(?Request $request) |
| 203 | { |
| 204 | // Load standard configuration options: |
| 205 | $standardTheme = $this->config->theme; |
| 206 | if (PHP_SAPI == 'cli') { |
| 207 | return $standardTheme; |
| 208 | } |
| 209 | $mobileTheme = $this->mobile->enabled() |
| 210 | ? $this->config->mobile_theme : false; |
| 211 | |
| 212 | // Find out if the user has a saved preference in the POST, URL or cookies: |
| 213 | $selectedUI = null; |
| 214 | if (isset($request)) { |
| 215 | $selectedUI = $request->getPost()->get( |
| 216 | 'ui', |
| 217 | $request->getQuery()->get( |
| 218 | 'ui', |
| 219 | $request->getCookie()->ui ?? null |
| 220 | ) |
| 221 | ); |
| 222 | } |
| 223 | if (empty($selectedUI)) { |
| 224 | $selectedUI = ($mobileTheme && $this->mobile->detect()) |
| 225 | ? 'mobile' : 'standard'; |
| 226 | } |
| 227 | |
| 228 | // Save the current setting to a cookie so it persists: |
| 229 | $this->cookieManager->set('ui', $selectedUI); |
| 230 | |
| 231 | // Do we have a valid mobile selection? |
| 232 | if ($mobileTheme && $selectedUI == 'mobile') { |
| 233 | return $mobileTheme; |
| 234 | } |
| 235 | |
| 236 | // Do we have a non-standard selection? |
| 237 | if ( |
| 238 | $selectedUI != 'standard' |
| 239 | && isset($this->config->alternate_themes) |
| 240 | ) { |
| 241 | // Check the alternate theme settings for a match: |
| 242 | $parts = explode(',', $this->config->alternate_themes); |
| 243 | foreach ($parts as $part) { |
| 244 | $subparts = explode(':', $part); |
| 245 | if ( |
| 246 | (trim($subparts[0]) == trim($selectedUI)) |
| 247 | && isset($subparts[1]) && !empty($subparts[1]) |
| 248 | ) { |
| 249 | return $subparts[1]; |
| 250 | } |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | // If we got this far, we either have a standard option or the user chose |
| 255 | // an invalid non-standard option; either way, we need to default to the |
| 256 | // standard theme: |
| 257 | return $standardTheme; |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * Make the theme options available to the view. |
| 262 | * |
| 263 | * @param string $currentTheme Active theme |
| 264 | * |
| 265 | * @return void |
| 266 | */ |
| 267 | protected function sendThemeOptionsToView($currentTheme) |
| 268 | { |
| 269 | // Get access to the view model: |
| 270 | if (PHP_SAPI !== 'cli') { |
| 271 | $viewModel = $this->serviceManager->get('ViewManager')->getViewModel(); |
| 272 | |
| 273 | // Send down the view options: |
| 274 | $viewModel->setVariable('themeOptions', $this->getThemeOptions($currentTheme)); |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * Return an array of information about user-selectable themes. Each entry in |
| 280 | * the array is an associative array with 'name', 'desc' and 'selected' keys. |
| 281 | * |
| 282 | * @param string $currentTheme Active theme |
| 283 | * |
| 284 | * @return array |
| 285 | */ |
| 286 | protected function getThemeOptions($currentTheme) |
| 287 | { |
| 288 | $options = []; |
| 289 | if (isset($this->config->selectable_themes)) { |
| 290 | $parts = explode(',', $this->config->selectable_themes); |
| 291 | foreach ($parts as $part) { |
| 292 | $subparts = explode(':', $part); |
| 293 | $name = trim($subparts[0]); |
| 294 | $desc = isset($subparts[1]) ? trim($subparts[1]) : ''; |
| 295 | $desc = empty($desc) ? $name : $desc; |
| 296 | if (!empty($name)) { |
| 297 | $options[] = [ |
| 298 | 'name' => $name, 'desc' => $desc, |
| 299 | 'selected' => ($currentTheme == $name), |
| 300 | ]; |
| 301 | } |
| 302 | } |
| 303 | } |
| 304 | return $options; |
| 305 | } |
| 306 | |
| 307 | /** |
| 308 | * Support method for setUpThemes -- register view helpers. |
| 309 | * |
| 310 | * @param array $helpers Helper settings |
| 311 | * |
| 312 | * @return void |
| 313 | */ |
| 314 | protected function setUpThemeViewHelpers($helpers) |
| 315 | { |
| 316 | // Grab the helper loader from the view manager: |
| 317 | $loader = $this->serviceManager->get('ViewHelperManager'); |
| 318 | |
| 319 | // Register all the helpers: |
| 320 | $config = new \Laminas\ServiceManager\Config($helpers); |
| 321 | $config->configureServiceManager($loader); |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * Support method for init() -- set up theme once current settings are known. |
| 326 | * |
| 327 | * @param array $themes Theme configuration information. |
| 328 | * |
| 329 | * @return void |
| 330 | */ |
| 331 | protected function setUpThemes($themes) |
| 332 | { |
| 333 | $templatePathStack = []; |
| 334 | |
| 335 | // Grab the resource manager for tracking CSS, JS, etc.: |
| 336 | $resources = $this->serviceManager |
| 337 | ->get(\VuFindTheme\ResourceContainer::class); |
| 338 | |
| 339 | // Set generator if necessary: |
| 340 | if (isset($this->config->generator)) { |
| 341 | $resources->setGenerator($this->config->generator); |
| 342 | } |
| 343 | |
| 344 | // Determine doctype and apply it: |
| 345 | $doctype = 'HTML5'; |
| 346 | foreach ($themes as $key => $currentThemeInfo) { |
| 347 | if (isset($currentThemeInfo['doctype'])) { |
| 348 | $doctype = $currentThemeInfo['doctype']; |
| 349 | break; |
| 350 | } |
| 351 | } |
| 352 | $loader = $this->serviceManager->get('ViewHelperManager'); |
| 353 | ($loader->get('doctype'))($doctype); |
| 354 | |
| 355 | // Apply the loaded theme settings in reverse for proper inheritance: |
| 356 | foreach ($themes as $key => $currentThemeInfo) { |
| 357 | if (isset($currentThemeInfo['helpers'])) { |
| 358 | $this->setUpThemeViewHelpers($currentThemeInfo['helpers']); |
| 359 | } |
| 360 | |
| 361 | // Add template path: |
| 362 | $templatePathStack[] = $this->tools->getBaseDir() . "/$key/templates"; |
| 363 | |
| 364 | // Add CSS and JS dependencies: |
| 365 | if (isset($currentThemeInfo['css'])) { |
| 366 | $resources->addCss($currentThemeInfo['css']); |
| 367 | } |
| 368 | if (isset($currentThemeInfo['js'])) { |
| 369 | $resources->addJs($currentThemeInfo['js']); |
| 370 | } |
| 371 | |
| 372 | // Select encoding: |
| 373 | if (isset($currentThemeInfo['encoding'])) { |
| 374 | $resources->setEncoding($currentThemeInfo['encoding']); |
| 375 | } |
| 376 | |
| 377 | // Select favicon: |
| 378 | if (isset($currentThemeInfo['favicon'])) { |
| 379 | $resources->setFavicon($currentThemeInfo['favicon']); |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | // Inject the path stack generated above into the resolver: |
| 384 | $resolver = $this->serviceManager->get(TemplatePathStack::class); |
| 385 | $resolver->addPaths($templatePathStack); |
| 386 | |
| 387 | // Add theme specific language files for translation |
| 388 | $this->updateTranslator($themes); |
| 389 | } |
| 390 | |
| 391 | /** |
| 392 | * Support method for setUpThemes() - add theme specific language files for |
| 393 | * translation. |
| 394 | * |
| 395 | * @param array $themes Theme configuration information. |
| 396 | * |
| 397 | * @return void |
| 398 | */ |
| 399 | protected function updateTranslator($themes) |
| 400 | { |
| 401 | $theme = null; |
| 402 | $pathStack = []; |
| 403 | foreach (array_keys($themes) as $theme) { |
| 404 | $dir = APPLICATION_PATH . '/themes/' . $theme . '/languages'; |
| 405 | if (is_dir($dir)) { |
| 406 | $pathStack[] = $dir; |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | if (!empty($pathStack)) { |
| 411 | try { |
| 412 | $translator = $this->serviceManager |
| 413 | ->get(\Laminas\Mvc\I18n\Translator::class); |
| 414 | $pm = $translator->getPluginManager(); |
| 415 | $pm->get('ExtendedIni')->addToPathStack($pathStack); |
| 416 | } catch (\Laminas\Mvc\I18n\Exception\BadMethodCallException $e) { |
| 417 | // This exception likely indicates that translation is disabled, |
| 418 | // so we can't proceed. |
| 419 | return; |
| 420 | } |
| 421 | |
| 422 | // Override the default cache with a theme-specific cache to avoid |
| 423 | // key collisions in a multi-theme environment. |
| 424 | try { |
| 425 | $cacheManager = $this->serviceManager |
| 426 | ->get(\VuFind\Cache\Manager::class); |
| 427 | $cacheName = $cacheManager->addLanguageCacheForTheme($theme); |
| 428 | $translator->setCache($cacheManager->getCache($cacheName)); |
| 429 | } catch (\Exception $e) { |
| 430 | // Don't let a cache failure kill the whole application, but make |
| 431 | // note of it: |
| 432 | $logger = $this->serviceManager->get(\VuFind\Log\Logger::class); |
| 433 | $logger->debug( |
| 434 | 'Problem loading cache: ' . $e::class . ' exception: ' |
| 435 | . $e->getMessage() |
| 436 | ); |
| 437 | } |
| 438 | } |
| 439 | } |
| 440 | } |