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Current File : /usr/share/phpmyadmin/libraries/classes/Theme.php
<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * hold Theme class
 *
 * @package PhpMyAdmin
 */
declare(strict_types=1);

namespace PhpMyAdmin;

use PhpMyAdmin\Template;
use PhpMyAdmin\ThemeManager;
use PhpMyAdmin\Url;

/**
 * handles theme
 *
 * @todo add the possibility to make a theme depend on another theme
 * and by default on original
 * @todo make all components optional - get missing components from 'parent' theme
 *
 * @package PhpMyAdmin
 */
class Theme
{
    /**
     * @var string theme version
     * @access  protected
     */
    public $version = '0.0.0.0';

    /**
     * @var string theme name
     * @access  protected
     */
    public $name = '';

    /**
     * @var string theme id
     * @access  protected
     */
    public $id = '';

    /**
     * @var string theme path
     * @access  protected
     */
    public $path = '';

    /**
     * @var string file system theme path
     */
    private $fsPath = '';

    /**
     * @var string image path
     * @access  protected
     */
    public $img_path = '';

    /**
     * @var integer last modification time for info file
     * @access  protected
     */
    public $mtime_info = 0;

    /**
     * needed because sometimes, the mtime for different themes
     * is identical
     * @var integer filesize for info file
     * @access  protected
     */
    public $filesize_info = 0;

    /**
     * @var array List of css files to load
     * @access private
     */
    public $_cssFiles = [
        'common',
        'enum_editor',
        'gis',
        'navigation',
        'designer',
        'rte',
        'codemirror',
        'jqplot',
        'resizable-menu',
        'icons',
    ];

    /**
     * @var Template
     */
    public $template;

    /**
     * Theme constructor.
     */
    public function __construct()
    {
        $this->template = new Template();
    }

    /**
     * Loads theme information
     *
     * @return boolean whether loading them info was successful or not
     * @access  public
     */
    public function loadInfo()
    {
        $infofile = $this->getFsPath() . 'theme.json';
        if (! @file_exists($infofile)) {
            return false;
        }

        if ($this->mtime_info === filemtime($infofile)) {
            return true;
        }
        $content = @file_get_contents($infofile);
        if ($content === false) {
            return false;
        }
        $data = json_decode($content, true);

        // Did we get expected data?
        if (! is_array($data)) {
            return false;
        }
        // Check that all required data are there
        $members = [
            'name',
            'version',
            'supports',
        ];
        foreach ($members as $member) {
            if (! isset($data[$member])) {
                return false;
            }
        }

        // Version check
        if (! is_array($data['supports'])) {
            return false;
        }
        if (! in_array(PMA_MAJOR_VERSION, $data['supports'])) {
            return false;
        }

        $this->mtime_info = filemtime($infofile);
        $this->filesize_info = filesize($infofile);

        $this->setVersion($data['version']);
        $this->setName($data['name']);

        return true;
    }

    /**
     * returns theme object loaded from given folder
     * or false if theme is invalid
     *
     * @param string $folder path to theme
     * @param string $fsPath file-system path to theme
     *
     * @return Theme|false
     * @static
     * @access public
     */
    public static function load(string $folder, string $fsPath)
    {
        $theme = new Theme();

        $theme->setPath($folder);
        $theme->setFsPath($fsPath);

        if (! $theme->loadInfo()) {
            return false;
        }

        $theme->checkImgPath();

        return $theme;
    }

    /**
     * checks image path for existence - if not found use img from fallback theme
     *
     * @access public
     * @return bool
     */
    public function checkImgPath()
    {
        // try current theme first
        if (is_dir($this->getFsPath() . 'img/')) {
            $this->setImgPath($this->getPath() . '/img/');
            return true;
        }

        // try fallback theme
        $fallback = ThemeManager::getThemesDir() . ThemeManager::FALLBACK_THEME . '/img/';
        if (is_dir(ThemeManager::getThemesFsDir() . ThemeManager::FALLBACK_THEME . '/img/')) {
            $this->setImgPath($fallback);
            return true;
        }

        // we failed
        trigger_error(
            sprintf(
                __('No valid image path for theme %s found!'),
                $this->getName()
            ),
            E_USER_ERROR
        );
        return false;
    }

    /**
     * returns path to theme
     *
     * @access public
     * @return string path to theme
     */
    public function getPath()
    {
        return $this->path;
    }

    /**
     * returns file system path to the theme
     *
     * @return string file system path to theme
     */
    public function getFsPath(): string
    {
        return $this->fsPath;
    }

    /**
     * set path to theme
     *
     * @param string $path path to theme
     *
     * @return void
     * @access public
     */
    public function setPath($path)
    {
        $this->path = trim($path);
    }

    /**
     * set file system path to the theme
     *
     * @param string $path path to theme
     *
     * @return void
     */
    public function setFsPath(string $path): void
    {
        $this->fsPath = trim($path);
    }

    /**
     * sets version
     *
     * @param string $version version to set
     *
     * @return void
     * @access public
     */
    public function setVersion($version)
    {
        $this->version = trim($version);
    }

    /**
     * returns version
     *
     * @return string version
     * @access public
     */
    public function getVersion()
    {
        return $this->version;
    }

    /**
     * checks theme version against $version
     * returns true if theme version is equal or higher to $version
     *
     * @param string $version version to compare to
     *
     * @return boolean true if theme version is equal or higher to $version
     * @access public
     */
    public function checkVersion($version)
    {
        return version_compare($this->getVersion(), $version, 'lt');
    }

    /**
     * sets name
     *
     * @param string $name name to set
     *
     * @return void
     * @access public
     */
    public function setName($name)
    {
        $this->name = trim($name);
    }

    /**
     * returns name
     *
     * @access  public
     * @return string name
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * sets id
     *
     * @param string $id new id
     *
     * @return void
     * @access public
     */
    public function setId($id)
    {
        $this->id = trim($id);
    }

    /**
     * returns id
     *
     * @return string id
     * @access public
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Sets path to images for the theme
     *
     * @param string $path path to images for this theme
     *
     * @return void
     * @access public
     */
    public function setImgPath($path)
    {
        $this->img_path = $path;
    }

    /**
     * Returns the path to image for the theme.
     * If filename is given, it possibly fallbacks to fallback
     * theme for it if image does not exist.
     *
     * @param string $file     file name for image
     * @param string $fallback fallback image
     *
     * @access public
     * @return string image path for this theme
     */
    public function getImgPath($file = null, $fallback = null)
    {
        if ($file === null) {
            return $this->img_path;
        }

        if (is_readable($this->img_path . $file)) {
            return $this->img_path . $file;
        }

        if ($fallback !== null) {
            return $this->getImgPath($fallback);
        }

        return './themes/' . ThemeManager::FALLBACK_THEME . '/img/' . $file;
    }

    /**
     * Renders the preview for this theme
     *
     * @return string
     * @access public
     */
    public function getPrintPreview()
    {
        $url_params = ['set_theme' => $this->getId()];
        $screen = null;
        if (@file_exists($this->getFsPath() . 'screen.png')) {
            $screen = $this->getPath() . '/screen.png';
        }

        return $this->template->render('theme_preview', [
            'url_params' => $url_params,
            'name' => $this->getName(),
            'version' => $this->getVersion(),
            'id' => $this->getId(),
            'screen' => $screen,
        ]);
    }
}

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