IconRegistry.php

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<?php
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Core\Imaging;
 
use ‪TYPO3\CMS\Core\Cache\CacheManager;
use ‪TYPO3\CMS\Core\Cache\Frontend\FrontendInterface;
use ‪TYPO3\CMS\Core\Cache\Frontend\VariableFrontend;
use ‪TYPO3\CMS\Core\Core\Environment;
use ‪TYPO3\CMS\Core\Exception;
use ‪TYPO3\CMS\Core\Imaging\IconProvider\BitmapIconProvider;
use ‪TYPO3\CMS\Core\Imaging\IconProvider\FontawesomeIconProvider;
use ‪TYPO3\CMS\Core\Imaging\IconProvider\SvgIconProvider;
use ‪TYPO3\CMS\Core\Imaging\IconProvider\SvgSpriteIconProvider;
use ‪TYPO3\CMS\Core\Information\Typo3Version;
use ‪TYPO3\CMS\Core\SingletonInterface;
use ‪TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
use ‪TYPO3\CMS\Core\Utility\StringUtility;
 
class ‪IconRegistry implements ‪SingletonInterface
{
    protected ‪$fullInitialized = false;
 
    protected ‪$tcaInitialized = false;
 
    protected ‪$flagsInitialized = false;
 
    protected ‪$moduleIconsInitialized = false;
 
    protected ‪$backendIconsInitialized = false;
 
    protected ‪$icons = [];
 
    protected ‪$backendIconDeclaration = 'EXT:core/Resources/Public/Icons/T3Icons/icons.json';
 
    protected ‪$backendIconAllowedExtensionsWithProvider = [
        'png' => BitmapIconProvider::class,
        'svg' => SvgIconProvider::class
    ];
 
    protected ‪$staticIcons = [
 
        // Apps
        'apps-pagetree-category-toggle-hide-checked' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'check-square'
            ]
        ],
 
        // Status
        'status-dialog-information' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'exclamation-circle'
            ]
        ],
        'status-dialog-ok' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'check-circle',
            ]
        ],
        'status-dialog-notification' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'exclamation-circle'
            ]
        ],
        'status-dialog-warning' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'exclamation-triangle'
            ]
        ],
        'status-dialog-error' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'exclamation-circle'
            ]
        ],
        'status-status-checked' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'check',
            ]
        ],
        'status-status-current' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'caret-right',
            ]
        ],
        'status-status-sorting-asc' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'caret-up',
            ]
        ],
        'status-status-sorting-desc' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'caret-down',
            ]
        ],
        'status-status-sorting-light-asc' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'caret-up',
            ]
        ],
        'status-status-sorting-light-desc' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'caret-down',
            ]
        ],
        'status-status-permission-granted' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'check',
            ]
        ],
        'status-status-permission-denied' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'times',
            ]
        ],
 
        // Empty
        'empty-empty' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'empty-empty',
            ]
        ],
 
        // System Information
        'information-php-version' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'code'
            ]
        ],
        'information-database' =>  [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'database'
            ]
        ],
        'information-application-context' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'tasks'
            ]
        ],
        'information-composer-mode' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'music'
            ]
        ],
        'information-git' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'git'
            ]
        ],
        'information-webserver' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'server'
            ]
        ],
        'information-os-linux' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'linux'
            ]
        ],
        'information-os-apple' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'apple'
            ]
        ],
        'information-os-windows' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'windows'
            ]
        ],
 
        // Sysnote
        'sysnote-type-0' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'sticky-note-o'
            ]
        ],
        'sysnote-type-1' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'cog'
            ]
        ],
        'sysnote-type-2' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'code'
            ]
        ],
        'sysnote-type-3' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'thumb-tack'
            ]
        ],
        'sysnote-type-4' => [
            'provider' => FontawesomeIconProvider::class,
            'options' => [
                'name' => 'check-square'
            ]
        ]
    ];
 
    protected ‪$fileExtensionMapping = [
        'htm' => 'mimetypes-text-html',
        'html' => 'mimetypes-text-html',
        'css' => 'mimetypes-text-css',
        'js' => 'mimetypes-text-js',
        'csv' => 'mimetypes-text-csv',
        'php' => 'mimetypes-text-php',
        'php6' => 'mimetypes-text-php',
        'php5' => 'mimetypes-text-php',
        'php4' => 'mimetypes-text-php',
        'php3' => 'mimetypes-text-php',
        'inc' => 'mimetypes-text-php',
        'ts' => 'mimetypes-text-ts',
        'typoscript' => 'mimetypes-text-typoscript',
        'txt' => 'mimetypes-text-text',
        'class' => 'mimetypes-text-text',
        'tmpl' => 'mimetypes-text-text',
        'jpg' => 'mimetypes-media-image',
        'jpeg' => 'mimetypes-media-image',
        'gif' => 'mimetypes-media-image',
        'png' => 'mimetypes-media-image',
        'bmp' => 'mimetypes-media-image',
        'tif' => 'mimetypes-media-image',
        'tiff' => 'mimetypes-media-image',
        'tga' => 'mimetypes-media-image',
        'psd' => 'mimetypes-media-image',
        'eps' => 'mimetypes-media-image',
        'ai' => 'mimetypes-media-image',
        'svg' => 'mimetypes-media-image',
        'pcx' => 'mimetypes-media-image',
        'avi' => 'mimetypes-media-video',
        'mpg' => 'mimetypes-media-video',
        'mpeg' => 'mimetypes-media-video',
        'mov' => 'mimetypes-media-video',
        'vimeo' => 'mimetypes-media-video-vimeo',
        'youtube' => 'mimetypes-media-video-youtube',
        'wav' => 'mimetypes-media-audio',
        'mp3' => 'mimetypes-media-audio',
        'ogg' => 'mimetypes-media-audio',
        'flac' => 'mimetypes-media-audio',
        'opus' => 'mimetypes-media-audio',
        'mid' => 'mimetypes-media-audio',
        'swf' => 'mimetypes-media-flash',
        'swa' => 'mimetypes-media-flash',
        'exe' => 'mimetypes-application',
        'com' => 'mimetypes-application',
        't3x' => 'mimetypes-compressed',
        't3d' => 'mimetypes-compressed',
        'zip' => 'mimetypes-compressed',
        'tgz' => 'mimetypes-compressed',
        'gz' => 'mimetypes-compressed',
        'pdf' => 'mimetypes-pdf',
        'doc' => 'mimetypes-word',
        'dot' => 'mimetypes-word',
        'docm' => 'mimetypes-word',
        'docx' => 'mimetypes-word',
        'dotm' => 'mimetypes-word',
        'dotx' => 'mimetypes-word',
        'sxw' => 'mimetypes-word',
        'rtf' => 'mimetypes-word',
        'xls' => 'mimetypes-excel',
        'xlsm' => 'mimetypes-excel',
        'xlsx' => 'mimetypes-excel',
        'xltm' => 'mimetypes-excel',
        'xltx' => 'mimetypes-excel',
        'sxc' => 'mimetypes-excel',
        'pps' => 'mimetypes-powerpoint',
        'ppsx' => 'mimetypes-powerpoint',
        'ppt' => 'mimetypes-powerpoint',
        'pptm' => 'mimetypes-powerpoint',
        'pptx' => 'mimetypes-powerpoint',
        'potm' => 'mimetypes-powerpoint',
        'potx' => 'mimetypes-powerpoint',
        'mount' => 'apps-filetree-mount',
        'folder' => 'apps-filetree-folder-default',
        'default' => 'mimetypes-other-other',
    ];
 
    protected ‪$mimeTypeMapping = [
        'video/*' => 'mimetypes-media-video',
        'audio/*' => 'mimetypes-media-audio',
        'image/*' => 'mimetypes-media-image',
        'text/*' => 'mimetypes-text-text',
    ];
 
    protected $iconAliases = [];
 
    protected $deprecatedIcons = [
        'module-web' => 'modulegroup-web',
        'module-site' => 'modulegroup-site',
        'module-file' => 'modulegroup-file',
        'module-tools' => 'modulegroup-tools',
        'module-system' => 'modulegroup-system',
        'module-help' => 'modulegroup-help',
        'module-workspaces-action-preview-link' => 'actions-version-workspaces-preview-link',
        'generate-ws-preview-link' => 'actions-version-workspaces-preview-link',
        'extensions-workspaces-generatepreviewlink' => 'actions-version-workspaces-preview-link',
        'extensions-extensionmanager-update-script' => 'actions-refresh',
        'extensions-scheduler-run-task' => 'actions-play',
        'extensions-scheduler-run-task-cron' => 'actions-clock',
        'status-warning-lock' => 'warning-lock',
        'status-warning-in-use' => 'warning-in-use',
        'status-status-edit-read-only' => 'status-edit-read-only',
        't3-form-icon-advanced-password' => 'form-advanced-password',
        't3-form-icon-checkbox' => 'form-checkbox',
        't3-form-icon-content-element' => 'form-content-element',
        't3-form-icon-date-picker' => 'form-date-picker',
        't3-form-icon-duplicate' => 'actions-duplicate',
        't3-form-icon-email' => 'form-email',
        't3-form-icon-fieldset' => 'form-fieldset',
        't3-form-icon-file-upload' => 'form-file-upload',
        't3-form-icon-finisher' => 'form-finisher',
        't3-form-icon-form-element-selector' => 'actions-variable-select',
        't3-form-icon-gridcontainer' => 'form-gridcontainer',
        't3-form-icon-gridrow' => 'form-gridrow',
        't3-form-icon-hidden' => 'form-hidden',
        't3-form-icon-image-upload' => 'form-image-upload',
        't3-form-icon-insert-after' => 'actions-form-insert-after',
        't3-form-icon-insert-in' => 'actions-form-insert-in',
        't3-form-icon-multi-checkbox' => 'form-multi-checkbox',
        't3-form-icon-multi-select' => 'form-multi-select',
        't3-form-icon-number' => 'form-number',
        't3-form-icon-page' => 'form-page',
        't3-form-icon-password' => 'form-password',
        't3-form-icon-radio-button' => 'form-radio-button',
        't3-form-icon-single-select' => 'form-single-select',
        't3-form-icon-static-text' => 'form-static-text',
        't3-form-icon-summary-page' => 'form-summary-page',
        't3-form-icon-telephone' => 'form-telephone',
        't3-form-icon-text' => 'form-text',
        't3-form-icon-textarea' => 'form-textarea',
        't3-form-icon-url' => 'form-url',
        't3-form-icon-validator' => 'form-validator',
    ];
 
    protected $defaultIconIdentifier = 'default-not-found';
 
    protected static $cache = null;
 
    public function __construct()
    {
        if (‪ExtensionManagementUtility::isLoaded('impexp')) {
            // ext:impexp is no required extension, the target items are located there.
            // Register its deprecations only if impexp is loaded
            $this->‪deprecatedIcons['status-status-reference-hard'] = 'status-reference-hard';
            $this->‪deprecatedIcons['status-status-reference-soft'] = 'status-reference-soft';
        }
        $this->‪initialize();
    }
 
    public static function ‪setCache(‪FrontendInterface $cache)
    {
        static::$cache = $cache;
    }
 
    protected function ‪initialize()
    {
        if (!$this->backendIconsInitialized) {
            $this->‪getCachedBackendIcons();
        }
        if (!$this->tcaInitialized && !empty(‪$GLOBALS['TCA'])) {
            $this->‪registerTCAIcons();
        }
        if (!$this->moduleIconsInitialized && !empty(‪$GLOBALS['TBE_MODULES'])) {
            $this->‪registerModuleIcons();
        }
        if (!$this->flagsInitialized) {
            $this->‪registerFlags();
        }
        if ($this->backendIconsInitialized
            && $this->tcaInitialized
            && $this->moduleIconsInitialized
            && $this->flagsInitialized) {
            $this->fullInitialized = true;
        }
    }
 
    protected function ‪getCachedBackendIcons()
    {
        $cacheIdentifier = 'BackendIcons_' . sha1((string)(new Typo3Version()) . ‪Environment::getProjectPath() . 'BackendIcons');
        $assetsCache = static::$cache ?? GeneralUtility::makeInstance(CacheManager::class)->getCache('assets');
        $cacheEntry = $assetsCache->get($cacheIdentifier);
 
        if ($cacheEntry !== false) {
            $this->icons = $cacheEntry;
        } else {
            $this->‪registerBackendIcons();
            // all found icons should now be present, for historic reasons now merge w/ the statically declared icons
            $this->icons = array_merge($this->icons, $this->iconAliases, $this->staticIcons);
            $assetsCache->set($cacheIdentifier, $this->icons);
        }
        // if there's now at least one icon registered, consider it successful
        if (is_array($this->icons) && (count($this->icons) >= count($this->staticIcons))) {
            $this->backendIconsInitialized = true;
        }
    }
 
    protected function ‪registerBackendIcons(): void
    {
        ‪$dir = dirname($this->backendIconDeclaration);
        $absoluteIconDeclarationPath = GeneralUtility::getFileAbsFileName($this->backendIconDeclaration);
        $json = json_decode(file_get_contents($absoluteIconDeclarationPath), true);
        foreach ($json['icons'] ?? [] as $declaration) {
            $iconOptions = [
                'sprite' => ‪$dir . '/' . $declaration['sprite'],
                'source' => ‪$dir . '/' . $declaration['svg'],
            ];
            // kind of hotfix for now, needs a nicer concept later
            if ($declaration['category'] === 'spinner') {
                $iconOptions['spinning'] = true;
            }
 
            $this->‪registerIcon(
                $declaration['identifier'],
                SvgSpriteIconProvider::class,
                $iconOptions
            );
        }
 
        foreach ($json['aliases'] as $alias => $identifier) {
            $this->‪registerAlias($alias, $identifier);
        }
    }
 
    public function ‪isRegistered($identifier)
    {
        if (!$this->fullInitialized) {
            $this->‪initialize();
        }
        return isset($this->icons[$identifier]);
    }
 
    public function ‪isDeprecated($identifier)
    {
        return isset($this->‪deprecatedIcons[$identifier]);
    }
 
    public function ‪getDefaultIconIdentifier()
    {
        return $this->defaultIconIdentifier;
    }
 
    public function ‪registerIcon($identifier, $iconProviderClassName, array $options = [])
    {
        if (!in_array(IconProviderInterface::class, class_implements($iconProviderClassName), true)) {
            throw new \InvalidArgumentException('An IconProvider must implement '
                . IconProviderInterface::class, 1437425803);
        }
        $this->icons[$identifier] = [
            'provider' => $iconProviderClassName,
            'options' => $options
        ];
    }
 
    public function ‪registerAlias($alias, $identifier)
    {
        if (!isset($this->icons[$identifier])) {
            throw new \InvalidArgumentException('No icon with identifier "' . $identifier . '" registered.', 1602251838);
        }
        $this->iconAliases[$alias] = $this->icons[$identifier];
    }
 
    public function ‪registerFileExtension($fileExtension, $iconIdentifier)
    {
        $this->fileExtensionMapping[$fileExtension] = $iconIdentifier;
    }
 
    public function ‪registerMimeTypeIcon($mimeType, $iconIdentifier)
    {
        $this->mimeTypeMapping[$mimeType] = $iconIdentifier;
    }
 
    public function ‪getIconConfigurationByIdentifier($identifier)
    {
        if (!$this->fullInitialized) {
            $this->‪initialize();
        }
        if ($this->‪isDeprecated($identifier)) {
            $replacement = $this->‪deprecatedIcons[$identifier] ?? null;
            if (!empty($replacement)) {
                $message = 'The icon "%s" is deprecated since TYPO3 v9 and will be removed in TYPO3 v10.0. Please use "%s" instead.';
                $arguments = [$identifier, $replacement];
                $identifier = $replacement;
            } else {
                $message = 'The icon "%s" is deprecated since TYPO3 v9 and will be removed in TYPO3 v10.0.';
                $arguments = [$identifier];
            }
            trigger_error(vsprintf($message, $arguments), E_USER_DEPRECATED);
        }
        if (!$this->‪isRegistered($identifier)) {
            throw new Exception('Icon with identifier "' . $identifier . '" is not registered"', 1437425804);
        }
        return $this->icons[$identifier];
    }
 
    public function ‪getAllRegisteredIconIdentifiers()
    {
        if (!$this->fullInitialized) {
            $this->‪initialize();
        }
        return array_keys($this->icons);
    }
 
    public function ‪getDeprecatedIcons(): array
    {
        return $this->deprecatedIcons;
    }
 
    public function ‪getIconIdentifierForFileExtension($fileExtension)
    {
        // If the file extension is not valid use the default one
        if (!isset($this->fileExtensionMapping[$fileExtension])) {
            $fileExtension = 'default';
        }
        return $this->fileExtensionMapping[$fileExtension];
    }
 
    public function ‪getIconIdentifierForMimeType($mimeType)
    {
        if (!isset($this->mimeTypeMapping[$mimeType])) {
            return null;
        }
        return $this->mimeTypeMapping[$mimeType];
    }
 
    public function ‪getCacheIdentifier(): string
    {
        if (!$this->fullInitialized) {
            $this->‪initialize();
        }
 
        return sha1((string)json_encode($this->icons));
    }
 
    protected function ‪registerTCAIcons()
    {
        $resultArray = [];
 
        $tcaTables = array_keys(‪$GLOBALS['TCA'] ?? []);
        // check every table in the TCA, if an icon is needed
        foreach ($tcaTables as $tableName) {
            // This method is only needed for TCA tables where typeicon_classes are not configured
            $iconIdentifier = 'tcarecords-' . $tableName . '-default';
            if (
                isset($this->icons[$iconIdentifier])
                || !isset(‪$GLOBALS['TCA'][$tableName]['ctrl']['iconfile'])
            ) {
                continue;
            }
            $resultArray[$iconIdentifier] = ‪$GLOBALS['TCA'][$tableName]['ctrl']['iconfile'];
        }
 
        foreach ($resultArray as $iconIdentifier => $iconFilePath) {
            $iconProviderClass = $this->‪detectIconProvider($iconFilePath);
            $this->icons[$iconIdentifier] = [
                'provider' => $iconProviderClass,
                'options' => [
                    'source' => $iconFilePath
                ]
            ];
        }
        $this->tcaInitialized = true;
    }
 
    protected function ‪registerModuleIcons()
    {
        $moduleConfiguration = ‪$GLOBALS['TBE_MODULES']['_configuration'] ?? [];
        foreach ($moduleConfiguration as $moduleKey => $singleModuleConfiguration) {
            $iconIdentifier = !empty($singleModuleConfiguration['iconIdentifier'])
                ? $singleModuleConfiguration['iconIdentifier']
                : null;
 
            if ($iconIdentifier !== null) {
                // iconIdentifier found, icon is registered, continue
                continue;
            }
 
            $iconPath = !empty($singleModuleConfiguration['icon'])
                ? $singleModuleConfiguration['icon']
                : null;
            $iconProviderClass = $this->‪detectIconProvider($iconPath);
            $iconIdentifier = 'module-icon-' . $moduleKey;
 
            $this->icons[$iconIdentifier] = [
                'provider' => $iconProviderClass,
                'options' => [
                    'source' => $iconPath
                ]
            ];
        }
        $this->moduleIconsInitialized = true;
    }
 
    protected function ‪registerFlags()
    {
        $iconFolder = 'EXT:core/Resources/Public/Icons/Flags/';
        $files = [
            'AD', 'AE', 'AF', 'AG', 'AI', 'AL', 'AM', 'AN', 'AO', 'AQ', 'AR', 'AS', 'AT', 'AU', 'AW', 'AX', 'AZ',
            'BA', 'BB', 'BD', 'BE', 'BF', 'BG', 'BH', 'BI', 'BJ', 'BL', 'BM', 'BN', 'BO', 'BQ', 'BR', 'BS', 'BT', 'BV', 'BW', 'BY', 'BZ',
            'CA', 'CC', 'CD', 'CF', 'CG', 'CH', 'CI', 'CK', 'CL', 'CM', 'CN', 'CO', 'CR', 'CS', 'CU', 'CV', 'CW', 'CX', 'CY', 'CZ',
            'DE', 'DJ', 'DK', 'DM', 'DO', 'DZ',
            'EC', 'EE', 'EG', 'EH', 'ER', 'ES', 'ET', 'EU',
            'FI', 'FJ', 'FK', 'FM', 'FO', 'FR',
            'GA', 'GB-ENG', 'GB-NIR', 'GB-SCT', 'GB-WLS', 'GB', 'GD', 'GE', 'GF', 'GG', 'GH', 'GI', 'GL', 'GM', 'GN', 'GP', 'GQ', 'GR', 'GS', 'GT', 'GU', 'GW', 'GY',
            'HK', 'HM', 'HN', 'HR', 'HT', 'HU',
            'ID', 'IE', 'IL', 'IM', 'IN', 'IO', 'IQ', 'IR', 'IS', 'IT',
            'JE', 'JM', 'JO', 'JP',
            'KE', 'KG', 'KH', 'KI', 'KL', 'KM', 'KN', 'KP', 'KR', 'KW', 'KY', 'KZ',
            'LA', 'LB', 'LC', 'LI', 'LK', 'LR', 'LS', 'LT', 'LU', 'LV', 'LY',
            'MA', 'MC', 'MD', 'ME', 'MF', 'MG', 'MH', 'MI', 'MK', 'ML', 'MM', 'MN', 'MO', 'MP', 'MQ', 'MR', 'MS', 'MT', 'MU', 'MV', 'MW', 'MX', 'MY', 'MZ',
            'NA', 'NC', 'NE', 'NF', 'NG', 'NI', 'NL', 'NO', 'NP', 'NR', 'NU', 'NZ',
            'OM',
            'PA', 'PE', 'PF', 'PG', 'PH', 'PK', 'PL', 'PM', 'PN', 'PR', 'PS', 'PT', 'PW', 'PY',
            'QA', 'QC',
            'RE', 'RO', 'RS', 'RU', 'RW',
            'SA', 'SB', 'SC', 'SD', 'SE', 'SG', 'SH', 'SI', 'SJ', 'SK', 'SL', 'SM', 'SN', 'SO', 'SR', 'SS', 'ST', 'SV', 'SX', 'SY', 'SZ',
            'TC', 'TD', 'TF', 'TG', 'TH', 'TJ', 'TK', 'TL', 'TM', 'TN', 'TO', 'TR', 'TT', 'TV', 'TW', 'TZ',
            'UA', 'UG', 'UM', 'US', 'UY', 'UZ',
            'VA', 'VC', 'VE', 'VG', 'VI', 'VN', 'VU',
            'WF', 'WS',
            'YE', 'YT',
            'ZA', 'ZM', 'ZW',
            // Special Flags
            'catalonia',
            'multiple',
            'en-us-gb'
        ];
        foreach ($files as $file) {
            $identifier = strtolower($file);
            $this->icons['flags-' . $identifier] = [
                'provider' => BitmapIconProvider::class,
                'options' => [
                    'source' => $iconFolder . $file . '.png'
                ]
            ];
        }
        $this->flagsInitialized = true;
    }
 
    public function ‪detectIconProvider($iconReference)
    {
        if (‪StringUtility::endsWith(strtolower($iconReference), 'svg')) {
            return SvgIconProvider::class;
        }
        return BitmapIconProvider::class;
    }
}