src/Core/Theme.php

   1 <?php
   2
   3 /**
   4  * @file src/Core/Theme.php
   5  */
   6
   7 namespace Friendica\Core;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Model\Profile;
  11 use Friendica\Util\Strings;
  12
  13 require_once 'boot.php';
  14
  15 /**
  16  * Some functions to handle themes
  17  */
  18 class Theme
  19 {
  20         public static function getAllowedList()
  21         {
  22                 $allowed_themes_str = Config::get('system', 'allowed_themes');
  23                 $allowed_themes_raw = explode(',', str_replace(' ', '', $allowed_themes_str));
  24                 $allowed_themes = [];
  25                 if (count($allowed_themes_raw)) {
  26                         foreach ($allowed_themes_raw as $theme) {
  27                                 $theme = Strings::sanitizeFilePathItem(trim($theme));
  28                                 if (strlen($theme) && is_dir("view/theme/$theme")) {
  29                                         $allowed_themes[] = $theme;
  30                                 }
  31                         }
  32                 }
  33
  34                 return $allowed_themes;
  35         }
  36
  37         public static function setAllowedList(array $allowed_themes)
  38         {
  39                 Config::set('system', 'allowed_themes', implode(',', $allowed_themes));
  40         }
  41
  42         /**
  43          * @brief Parse theme comment in search of theme infos.
  44          *
  45          * like
  46          * \code
  47          * ..* Name: My Theme
  48          *   * Description: My Cool Theme
  49          * . * Version: 1.2.3
  50          *   * Author: John <profile url>
  51          *   * Maintainer: Jane <profile url>
  52          *   *
  53          * \endcode
  54          * @param string $theme the name of the theme
  55          * @return array
  56          */
  57         public static function getInfo($theme)
  58         {
  59                 $theme = Strings::sanitizeFilePathItem($theme);
  60
  61                 $info = [
  62                         'name' => $theme,
  63                         'description' => "",
  64                         'author' => [],
  65                         'maintainer' => [],
  66                         'version' => "",
  67                         'credits' => "",
  68                         'experimental' => file_exists("view/theme/$theme/experimental"),
  69                         'unsupported' => file_exists("view/theme/$theme/unsupported")
  70                 ];
  71
  72                 if (!is_file("view/theme/$theme/theme.php")) {
  73                         return $info;
  74                 }
  75
  76                 $a = \get_app();
  77                 $stamp1 = microtime(true);
  78                 $theme_file = file_get_contents("view/theme/$theme/theme.php");
  79                 $a->getProfiler()->saveTimestamp($stamp1, "file", System::callstack());
  80
  81                 $result = preg_match("|/\*.*\*/|msU", $theme_file, $matches);
  82
  83                 if ($result) {
  84                         $comment_lines = explode("\n", $matches[0]);
  85                         foreach ($comment_lines as $comment_line) {
  86                                 $comment_line = trim($comment_line, "\t\n\r */");
  87                                 if ($comment_line != "") {
  88                                         list($key, $value) = array_map("trim", explode(":", $comment_line, 2));
  89                                         $key = strtolower($key);
  90                                         if ($key == "author") {
  91                                                 $result = preg_match("|([^<]+)<([^>]+)>|", $value, $matches);
  92                                                 if ($result) {
  93                                                         $info['author'][] = ['name' => $matches[1], 'link' => $matches[2]];
  94                                                 } else {
  95                                                         $info['author'][] = ['name' => $value];
  96                                                 }
  97                                         } elseif ($key == "maintainer") {
  98                                                 $result = preg_match("|([^<]+)<([^>]+)>|", $value, $matches);
  99                                                 if ($result) {
 100                                                         $info['maintainer'][] = ['name' => $matches[1], 'link' => $matches[2]];
 101                                                 } else {
 102                                                         $info['maintainer'][] = ['name' => $value];
 103                                                 }
 104                                         } elseif (array_key_exists($key, $info)) {
 105                                                 $info[$key] = $value;
 106                                         }
 107                                 }
 108                         }
 109                 }
 110                 return $info;
 111         }
 112
 113         /**
 114          * @brief Returns the theme's screenshot.
 115          *
 116          * The screenshot is expected as view/theme/$theme/screenshot.[png|jpg].
 117          *
 118          * @param string $theme The name of the theme
 119          * @return string
 120          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 121          */
 122         public static function getScreenshot($theme)
 123         {
 124                 $theme = Strings::sanitizeFilePathItem($theme);
 125
 126                 $exts = ['.png', '.jpg'];
 127                 foreach ($exts as $ext) {
 128                         if (file_exists('view/theme/' . $theme . '/screenshot' . $ext)) {
 129                                 return System::baseUrl() . '/view/theme/' . $theme . '/screenshot' . $ext;
 130                         }
 131                 }
 132                 return System::baseUrl() . '/images/blank.png';
 133         }
 134
 135         public static function uninstall($theme)
 136         {
 137                 $theme = Strings::sanitizeFilePathItem($theme);
 138
 139                 // silently fail if theme was removed or if $theme is funky
 140                 if (file_exists("view/theme/$theme/theme.php")) {
 141                         include_once "view/theme/$theme/theme.php";
 142
 143                         $func = "{$theme}_uninstall";
 144                         if (function_exists($func)) {
 145                                 $func();
 146                         }
 147                 }
 148
 149                 $allowed_themes = Theme::getAllowedList();
 150                 $key = array_search($theme, $allowed_themes);
 151                 if ($key !== false) {
 152                         unset($allowed_themes[$key]);
 153                         Theme::setAllowedList($allowed_themes);
 154                 }
 155         }
 156
 157         public static function install($theme)
 158         {
 159                 $theme = Strings::sanitizeFilePathItem($theme);
 160
 161                 // silently fail if theme was removed or if $theme is funky
 162                 if (!file_exists("view/theme/$theme/theme.php")) {
 163                         return false;
 164                 }
 165
 166                 try {
 167                         include_once "view/theme/$theme/theme.php";
 168
 169                         $func = "{$theme}_install";
 170                         if (function_exists($func)) {
 171                                 $func();
 172                         }
 173
 174                         $allowed_themes = Theme::getAllowedList();
 175                         $allowed_themes[] = $theme;
 176                         Theme::setAllowedList($allowed_themes);
 177
 178                         return true;
 179                 } catch (\Exception $e) {
 180                         return false;
 181                 }
 182         }
 183
 184         /**
 185          * @brief Get the full path to relevant theme files by filename
 186          *
 187          * This function search in the theme directory (and if not present in global theme directory)
 188          * if there is a directory with the file extension and  for a file with the given
 189          * filename.
 190          *
 191          * @param string $file Filename
 192          * @param string $root Full root path
 193          * @return string Path to the file or empty string if the file isn't found
 194          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 195          */
 196         public static function getPathForFile($file, $root = '')
 197         {
 198                 $file = basename($file);
 199
 200                 // Make sure $root ends with a slash / if it's not blank
 201                 if ($root !== '' && $root[strlen($root) - 1] !== '/') {
 202                         $root = $root . '/';
 203                 }
 204                 $theme_info = \get_app()->theme_info;
 205                 if (is_array($theme_info) && array_key_exists('extends', $theme_info)) {
 206                         $parent = $theme_info['extends'];
 207                 } else {
 208                         $parent = 'NOPATH';
 209                 }
 210                 $theme = \get_app()->getCurrentTheme();
 211                 $parent = Strings::sanitizeFilePathItem($parent);
 212                 $ext = substr($file, strrpos($file, '.') + 1);
 213                 $paths = [
 214                         "{$root}view/theme/$theme/$ext/$file",
 215                         "{$root}view/theme/$parent/$ext/$file",
 216                         "{$root}view/$ext/$file",
 217                 ];
 218                 foreach ($paths as $p) {
 219                         // strpos() is faster than strstr when checking if one string is in another (http://php.net/manual/en/function.strstr.php)
 220                         if (strpos($p, 'NOPATH') !== false) {
 221                                 continue;
 222                         } elseif (file_exists($p)) {
 223                                 return $p;
 224                         }
 225                 }
 226                 return '';
 227         }
 228
 229         /**
 230          * @brief Return relative path to theme stylesheet file
 231          *
 232          * Provide a sane default if nothing is chosen or the specified theme does not exist.
 233          *
 234          * @param string $theme Theme name
 235          *
 236          * @return string
 237          */
 238         public static function getStylesheetPath($theme)
 239         {
 240                 $theme = Strings::sanitizeFilePathItem($theme);
 241
 242                 if (!file_exists('view/theme/' . $theme . '/style.php')) {
 243                         return 'view/theme/' . $theme . '/style.css';
 244                 }
 245
 246                 $a = BaseObject::getApp();
 247
 248                 $query_params = [];
 249
 250                 $puid = Profile::getThemeUid($a);
 251                 if ($puid) {
 252                         $query_params['puid'] = $puid;
 253                 }
 254
 255                 return 'view/theme/' . $theme . '/style.pcss' . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
 256         }
 257 }