+ var $name = null;
+ var $dir = null;
+ var $path = null;
+
+ /**
+ * Constructor
+ *
+ * Determines the proper directory and path for this theme.
+ *
+ * @param string $name Name of the theme; defaults to config value
+ */
+
+ function __construct($name=null)
+ {
+ if (empty($name)) {
+ $name = common_config('site', 'theme');
+ }
+ if (!self::validName($name)) {
+ throw new ServerException("Invalid theme name.");
+ }
+ $this->name = $name;
+
+ // Check to see if it's in the local dir
+
+ $localroot = self::localRoot();
+
+ $fulldir = $localroot.'/'.$name;
+
+ if (file_exists($fulldir) && is_dir($fulldir)) {
+ $this->dir = $fulldir;
+ $this->path = $this->relativeThemePath('local', 'local', 'theme/' . $name);
+ return;
+ }
+
+ // Check to see if it's in the distribution dir
+
+ $instroot = self::installRoot();
+
+ $fulldir = $instroot.'/'.$name;
+
+ if (file_exists($fulldir) && is_dir($fulldir)) {
+
+ $this->dir = $fulldir;
+ $this->path = $this->relativeThemePath('theme', 'theme', $name);
+ }
+ }
+
+ /**
+ * Build a full URL to the given theme's base directory, possibly
+ * using an offsite theme server path.
+ *
+ * @param string $group configuration section name to pull paths from
+ * @param string $fallbackSubdir default subdirectory under INSTALLDIR
+ * @param string $name theme name
+ *
+ * @return string URL
+ *
+ * @todo consolidate code with that for other customizable paths
+ */
+
+ protected function relativeThemePath($group, $fallbackSubdir, $name)
+ {
+ $path = common_config($group, 'path');
+
+ if (empty($path)) {
+ $path = common_config('site', 'path') . '/';
+ if ($fallbackSubdir) {
+ $path .= $fallbackSubdir . '/';
+ }
+ }
+
+ if ($path[strlen($path)-1] != '/') {
+ $path .= '/';
+ }
+
+ if ($path[0] != '/') {
+ $path = '/'.$path;
+ }
+
+ $server = common_config($group, 'server');
+
+ if (empty($server)) {
+ $server = common_config('site', 'server');
+ }
+
+ $ssl = common_config($group, 'ssl');
+
+ if (is_null($ssl)) { // null -> guess
+ if (common_config('site', 'ssl') == 'always' &&
+ !common_config($group, 'server')) {
+ $ssl = true;
+ } else {
+ $ssl = false;
+ }
+ }
+
+ $protocol = ($ssl) ? 'https' : 'http';
+
+ $path = $protocol . '://'.$server.$path.$name;
+ return $path;
+ }
+
+ /**
+ * Gets the full local filename of a file in this theme.
+ *
+ * @param string $relative relative name, like 'logo.png'
+ *
+ * @return string full pathname, like /var/www/mublog/theme/default/logo.png
+ */
+
+ function getFile($relative)
+ {
+ return $this->dir.'/'.$relative;
+ }
+
+ /**
+ * Gets the full HTTP url of a file in this theme
+ *
+ * @param string $relative relative name, like 'logo.png'
+ *
+ * @return string full URL, like 'http://example.com/theme/default/logo.png'
+ */
+
+ function getPath($relative)
+ {
+ return $this->path.'/'.$relative;
+ }
+
+ /**
+ * Fetch a list of other themes whose CSS needs to be pulled in before
+ * this theme's, based on following the theme.ini 'include' settings.
+ * (May be empty if this theme has no include dependencies.)
+ *
+ * @return array of strings with theme names
+ */
+ function getDeps()
+ {
+ $chain = $this->doGetDeps(array($this->name));
+ array_pop($chain); // Drop us back off
+ return $chain;
+ }
+
+ protected function doGetDeps($chain)
+ {
+ $data = $this->getMetadata();
+ if (!empty($data['include'])) {
+ $include = $data['include'];
+
+ // Protect against cycles!
+ if (!in_array($include, $chain)) {
+ try {
+ $theme = new Theme($include);
+ array_unshift($chain, $include);
+ return $theme->doGetDeps($chain);
+ } catch (Exception $e) {
+ common_log(LOG_ERR,
+ "Exception while fetching theme dependencies " .
+ "for $this->name: " . $e->getMessage());
+ }
+ }
+ }
+ return $chain;
+ }
+
+ /**
+ * Pull data from the theme's theme.ini file.
+ * @fixme calling getFile will fall back to default theme, this may be unsafe.
+ *
+ * @return associative array of strings
+ */
+ function getMetadata()
+ {
+ $iniFile = $this->getFile('theme.ini');
+ if (file_exists($iniFile)) {
+ return parse_ini_file($iniFile);
+ } else {
+ return array();
+ }
+ }
+
+ /**
+ * Gets the full path of a file in a theme dir based on its relative name
+ *
+ * @param string $relative relative path within the theme directory
+ * @param string $name name of the theme; defaults to current theme
+ *
+ * @return string File path to the theme file
+ */
+
+ static function file($relative, $name=null)
+ {
+ $theme = new Theme($name);
+ return $theme->getFile($relative);
+ }
+
+ /**
+ * Gets the full URL of a file in a theme dir based on its relative name
+ *
+ * @param string $relative relative path within the theme directory
+ * @param string $name name of the theme; defaults to current theme
+ *
+ * @return string URL of the file
+ */
+
+ static function path($relative, $name=null)
+ {
+ $theme = new Theme($name);
+ return $theme->getPath($relative);
+ }
+
+ /**
+ * list available theme names
+ *
+ * @return array list of available theme names
+ */
+
+ static function listAvailable()
+ {
+ $local = self::subdirsOf(self::localRoot());
+ $install = self::subdirsOf(self::installRoot());
+
+ $i = array_search('base', $install);
+
+ unset($install[$i]);
+
+ return array_merge($local, $install);
+ }
+
+ /**
+ * Utility for getting subdirs of a directory
+ *
+ * @param string $dir full path to directory to check
+ *
+ * @return array relative filenames of subdirs, or empty array
+ */
+
+ protected static function subdirsOf($dir)
+ {
+ $subdirs = array();
+
+ if (is_dir($dir)) {
+ if ($dh = opendir($dir)) {
+ while (($filename = readdir($dh)) !== false) {
+ if ($filename != '..' && $filename !== '.' &&
+ is_dir($dir.'/'.$filename)) {
+ $subdirs[] = $filename;
+ }
+ }
+ closedir($dh);
+ }
+ }
+
+ return $subdirs;
+ }
+
+ /**
+ * Local root dir for themes
+ *
+ * @return string local root dir for themes
+ */
+
+ protected static function localRoot()
+ {
+ $basedir = common_config('local', 'dir');
+
+ if (empty($basedir)) {
+ $basedir = INSTALLDIR . '/local';
+ }
+
+ return $basedir . '/theme';
+ }
+
+ /**
+ * Root dir for themes that are shipped with StatusNet
+ *
+ * @return string root dir for StatusNet themes
+ */
+
+ protected static function installRoot()
+ {
+ $instroot = common_config('theme', 'dir');
+
+ if (empty($instroot)) {
+ $instroot = INSTALLDIR.'/theme';
+ }
+
+ return $instroot;
+ }
+
+ static function validName($name)
+ {
+ return preg_match('/^[a-z0-9][a-z0-9_-]*$/i', $name);
+ }
+}