src/Core/Theme.php

   1 <?php
   2
   3 /**
   4  * @file src/Core/Theme.php
   5  */
   6
   7 namespace Friendica\Core;
   8
   9 use Friendica\DI;
  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[] = $theme;
  30                                 }
  31                         }
  32                 }
  33
  34                 return array_unique($allowed_themes);
  35         }
  36
  37         public static function setAllowedList(array $allowed_themes)
  38         {
  39                 Config::set('system', 'allowed_themes', implode(',', array_unique($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                 $stamp1 = microtime(true);
  77                 $theme_file = file_get_contents("view/theme/$theme/theme.php");
  78                 DI::profiler()->saveTimestamp($stamp1, "file", System::callstack());
  79
  80                 $result = preg_match("|/\*.*\*/|msU", $theme_file, $matches);
  81
  82                 if ($result) {
  83                         $comment_lines = explode("\n", $matches[0]);
  84                         foreach ($comment_lines as $comment_line) {
  85                                 $comment_line = trim($comment_line, "\t\n\r */");
  86                                 if ($comment_line != "") {
  87                                         list($key, $value) = array_map("trim", explode(":", $comment_line, 2));
  88                                         $key = strtolower($key);
  89                                         if ($key == "author") {
  90                                                 $result = preg_match("|([^<]+)<([^>]+)>|", $value, $matches);
  91                                                 if ($result) {
  92                                                         $info['author'][] = ['name' => $matches[1], 'link' => $matches[2]];
  93                                                 } else {
  94                                                         $info['author'][] = ['name' => $value];
  95                                                 }
  96                                         } elseif ($key == "maintainer") {
  97                                                 $result = preg_match("|([^<]+)<([^>]+)>|", $value, $matches);
  98                                                 if ($result) {
  99                                                         $info['maintainer'][] = ['name' => $matches[1], 'link' => $matches[2]];
 100                                                 } else {
 101                                                         $info['maintainer'][] = ['name' => $value];
 102                                                 }
 103                                         } elseif (array_key_exists($key, $info)) {
 104                                                 $info[$key] = $value;
 105                                         }
 106                                 }
 107                         }
 108                 }
 109                 return $info;
 110         }
 111
 112         /**
 113          * @brief Returns the theme's screenshot.
 114          *
 115          * The screenshot is expected as view/theme/$theme/screenshot.[png|jpg].
 116          *
 117          * @param string $theme The name of the theme
 118          * @return string
 119          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 120          */
 121         public static function getScreenshot($theme)
 122         {
 123                 $theme = Strings::sanitizeFilePathItem($theme);
 124
 125                 $exts = ['.png', '.jpg'];
 126                 foreach ($exts as $ext) {
 127                         if (file_exists('view/theme/' . $theme . '/screenshot' . $ext)) {
 128                                 return DI::baseUrl() . '/view/theme/' . $theme . '/screenshot' . $ext;
 129                         }
 130                 }
 131                 return DI::baseUrl() . '/images/blank.png';
 132         }
 133
 134         public static function uninstall($theme)
 135         {
 136                 $theme = Strings::sanitizeFilePathItem($theme);
 137
 138                 // silently fail if theme was removed or if $theme is funky
 139                 if (file_exists("view/theme/$theme/theme.php")) {
 140                         include_once "view/theme/$theme/theme.php";
 141
 142                         $func = "{$theme}_uninstall";
 143                         if (function_exists($func)) {
 144                                 $func();
 145                         }
 146                 }
 147
 148                 $allowed_themes = Theme::getAllowedList();
 149                 $key = array_search($theme, $allowed_themes);
 150                 if ($key !== false) {
 151                         unset($allowed_themes[$key]);
 152                         Theme::setAllowedList($allowed_themes);
 153                 }
 154         }
 155
 156         public static function install($theme)
 157         {
 158                 $theme = Strings::sanitizeFilePathItem($theme);
 159
 160                 // silently fail if theme was removed or if $theme is funky
 161                 if (!file_exists("view/theme/$theme/theme.php")) {
 162                         return false;
 163                 }
 164
 165                 try {
 166                         include_once "view/theme/$theme/theme.php";
 167
 168                         $func = "{$theme}_install";
 169                         if (function_exists($func)) {
 170                                 $func();
 171                         }
 172
 173                         $allowed_themes = Theme::getAllowedList();
 174                         $allowed_themes[] = $theme;
 175                         Theme::setAllowedList($allowed_themes);
 176
 177                         return true;
 178                 } catch (\Exception $e) {
 179                         Logger::error('Theme installation failed', ['theme' => $theme, 'error' => $e->getMessage()]);
 180                         return false;
 181                 }
 182         }
 183
 184         /**
 185          * @brief Get the full path to relevant theme files by filename
 186          *
 187          * This function searches in order in the current theme directory, in the current theme parent directory, and lastly
 188          * in the base view/ folder.
 189          *
 190          * @param string $file Filename
 191          * @return string Path to the file or empty string if the file isn't found
 192          * @throws \Exception
 193          */
 194         public static function getPathForFile($file)
 195         {
 196                 $a = DI::app();
 197
 198                 $theme = $a->getCurrentTheme();
 199
 200                 $parent = Strings::sanitizeFilePathItem($a->theme_info['extends'] ?? $theme);
 201
 202                 $paths = [
 203                         "view/theme/$theme/$file",
 204                         "view/theme/$parent/$file",
 205                         "view/$file",
 206                 ];
 207
 208                 foreach ($paths as $path) {
 209                         if (file_exists($path)) {
 210                                 return $path;
 211                         }
 212                 }
 213
 214                 return '';
 215         }
 216
 217         /**
 218          * @brief Return relative path to theme stylesheet file
 219          *
 220          * Provide a sane default if nothing is chosen or the specified theme does not exist.
 221          *
 222          * @param string $theme Theme name
 223          *
 224          * @return string
 225          */
 226         public static function getStylesheetPath($theme)
 227         {
 228                 $theme = Strings::sanitizeFilePathItem($theme);
 229
 230                 if (!file_exists('view/theme/' . $theme . '/style.php')) {
 231                         return 'view/theme/' . $theme . '/style.css';
 232                 }
 233
 234                 $a = DI::app();
 235
 236                 $query_params = [];
 237
 238                 $puid = Profile::getThemeUid($a);
 239                 if ($puid) {
 240                         $query_params['puid'] = $puid;
 241                 }
 242
 243                 return 'view/theme/' . $theme . '/style.pcss' . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
 244         }
 245 }