src/Core/Theme.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Core;
  23
  24 use Friendica\DI;
  25 use Friendica\Model\Profile;
  26 use Friendica\Util\Strings;
  27
  28 require_once 'boot.php';
  29
  30 /**
  31  * Some functions to handle themes
  32  */
  33 class Theme
  34 {
  35         public static function getAllowedList()
  36         {
  37                 $allowed_themes_str = DI::config()->get('system', 'allowed_themes');
  38                 $allowed_themes_raw = explode(',', str_replace(' ', '', $allowed_themes_str));
  39                 $allowed_themes = [];
  40                 if (count($allowed_themes_raw)) {
  41                         foreach ($allowed_themes_raw as $theme) {
  42                                 $theme = Strings::sanitizeFilePathItem(trim($theme));
  43                                 if (strlen($theme) && is_dir("view/theme/$theme")) {
  44                                         $allowed_themes[] = $theme;
  45                                 }
  46                         }
  47                 }
  48
  49                 return array_unique($allowed_themes);
  50         }
  51
  52         public static function setAllowedList(array $allowed_themes)
  53         {
  54                 DI::config()->set('system', 'allowed_themes', implode(',', array_unique($allowed_themes)));
  55         }
  56
  57         /**
  58          * Parse theme comment in search of theme infos.
  59          *
  60          * like
  61          * \code
  62          * ..* Name: My Theme
  63          *   * Description: My Cool Theme
  64          * . * Version: 1.2.3
  65          *   * Author: John <profile url>
  66          *   * Maintainer: Jane <profile url>
  67          *   *
  68          * \endcode
  69          * @param string $theme the name of the theme
  70          * @return array
  71          */
  72         public static function getInfo($theme)
  73         {
  74                 $theme = Strings::sanitizeFilePathItem($theme);
  75
  76                 $info = [
  77                         'name' => $theme,
  78                         'description' => "",
  79                         'author' => [],
  80                         'maintainer' => [],
  81                         'version' => "",
  82                         'credits' => "",
  83                         'experimental' => file_exists("view/theme/$theme/experimental"),
  84                         'unsupported' => file_exists("view/theme/$theme/unsupported")
  85                 ];
  86
  87                 if (!is_file("view/theme/$theme/theme.php")) {
  88                         return $info;
  89                 }
  90
  91                 $stamp1 = microtime(true);
  92                 $theme_file = file_get_contents("view/theme/$theme/theme.php");
  93                 DI::profiler()->saveTimestamp($stamp1, "file", System::callstack());
  94
  95                 $result = preg_match("|/\*.*\*/|msU", $theme_file, $matches);
  96
  97                 if ($result) {
  98                         $comment_lines = explode("\n", $matches[0]);
  99                         foreach ($comment_lines as $comment_line) {
 100                                 $comment_line = trim($comment_line, "\t\n\r */");
 101                                 if ($comment_line != "") {
 102                                         list($key, $value) = array_map("trim", explode(":", $comment_line, 2));
 103                                         $key = strtolower($key);
 104                                         if ($key == "author") {
 105                                                 $result = preg_match("|([^<]+)<([^>]+)>|", $value, $matches);
 106                                                 if ($result) {
 107                                                         $info['author'][] = ['name' => $matches[1], 'link' => $matches[2]];
 108                                                 } else {
 109                                                         $info['author'][] = ['name' => $value];
 110                                                 }
 111                                         } elseif ($key == "maintainer") {
 112                                                 $result = preg_match("|([^<]+)<([^>]+)>|", $value, $matches);
 113                                                 if ($result) {
 114                                                         $info['maintainer'][] = ['name' => $matches[1], 'link' => $matches[2]];
 115                                                 } else {
 116                                                         $info['maintainer'][] = ['name' => $value];
 117                                                 }
 118                                         } elseif (array_key_exists($key, $info)) {
 119                                                 $info[$key] = $value;
 120                                         }
 121                                 }
 122                         }
 123                 }
 124                 return $info;
 125         }
 126
 127         /**
 128          * Returns the theme's screenshot.
 129          *
 130          * The screenshot is expected as view/theme/$theme/screenshot.[png|jpg].
 131          *
 132          * @param string $theme The name of the theme
 133          * @return string
 134          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 135          */
 136         public static function getScreenshot($theme)
 137         {
 138                 $theme = Strings::sanitizeFilePathItem($theme);
 139
 140                 $exts = ['.png', '.jpg'];
 141                 foreach ($exts as $ext) {
 142                         if (file_exists('view/theme/' . $theme . '/screenshot' . $ext)) {
 143                                 return DI::baseUrl() . '/view/theme/' . $theme . '/screenshot' . $ext;
 144                         }
 145                 }
 146                 return DI::baseUrl() . '/images/blank.png';
 147         }
 148
 149         public static function uninstall($theme)
 150         {
 151                 $theme = Strings::sanitizeFilePathItem($theme);
 152
 153                 // silently fail if theme was removed or if $theme is funky
 154                 if (file_exists("view/theme/$theme/theme.php")) {
 155                         include_once "view/theme/$theme/theme.php";
 156
 157                         $func = "{$theme}_uninstall";
 158                         if (function_exists($func)) {
 159                                 $func();
 160                         }
 161                 }
 162
 163                 $allowed_themes = Theme::getAllowedList();
 164                 $key = array_search($theme, $allowed_themes);
 165                 if ($key !== false) {
 166                         unset($allowed_themes[$key]);
 167                         Theme::setAllowedList($allowed_themes);
 168                 }
 169         }
 170
 171         public static function install($theme)
 172         {
 173                 $theme = Strings::sanitizeFilePathItem($theme);
 174
 175                 // silently fail if theme was removed or if $theme is funky
 176                 if (!file_exists("view/theme/$theme/theme.php")) {
 177                         return false;
 178                 }
 179
 180                 try {
 181                         include_once "view/theme/$theme/theme.php";
 182
 183                         $func = "{$theme}_install";
 184                         if (function_exists($func)) {
 185                                 $func();
 186                         }
 187
 188                         $allowed_themes = Theme::getAllowedList();
 189                         $allowed_themes[] = $theme;
 190                         Theme::setAllowedList($allowed_themes);
 191
 192                         return true;
 193                 } catch (\Exception $e) {
 194                         Logger::error('Theme installation failed', ['theme' => $theme, 'error' => $e->getMessage()]);
 195                         return false;
 196                 }
 197         }
 198
 199         /**
 200          * Get the full path to relevant theme files by filename
 201          *
 202          * This function searches in order in the current theme directory, in the current theme parent directory, and lastly
 203          * in the base view/ folder.
 204          *
 205          * @param string $file Filename
 206          * @return string Path to the file or empty string if the file isn't found
 207          * @throws \Exception
 208          */
 209         public static function getPathForFile($file)
 210         {
 211                 $a = DI::app();
 212
 213                 $theme = $a->getCurrentTheme();
 214
 215                 $parent = Strings::sanitizeFilePathItem($a->theme_info['extends'] ?? $theme);
 216
 217                 $paths = [
 218                         "view/theme/$theme/$file",
 219                         "view/theme/$parent/$file",
 220                         "view/$file",
 221                 ];
 222
 223                 foreach ($paths as $path) {
 224                         if (file_exists($path)) {
 225                                 return $path;
 226                         }
 227                 }
 228
 229                 return '';
 230         }
 231
 232         /**
 233          * Return relative path to theme stylesheet file
 234          *
 235          * Provide a sane default if nothing is chosen or the specified theme does not exist.
 236          *
 237          * @param string $theme Theme name
 238          *
 239          * @return string
 240          */
 241         public static function getStylesheetPath($theme)
 242         {
 243                 $theme = Strings::sanitizeFilePathItem($theme);
 244
 245                 if (!file_exists('view/theme/' . $theme . '/style.php')) {
 246                         return 'view/theme/' . $theme . '/style.css';
 247                 }
 248
 249                 $a = DI::app();
 250
 251                 $query_params = [];
 252
 253                 $puid = Profile::getThemeUid($a);
 254                 if ($puid) {
 255                         $query_params['puid'] = $puid;
 256                 }
 257
 258                 return 'view/theme/' . $theme . '/style.pcss' . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
 259         }
 260 }