friendica/src/Core/Theme.php

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<?php
/**
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* @copyright Copyright (C) 2020, Friendica
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
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namespace Friendica\Core;
use Friendica\DI;
use Friendica\Model\Profile;
use Friendica\Util\Strings;
require_once 'boot.php';
/**
* Some functions to handle themes
*/
class Theme
{
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public static function getAllowedList()
{
$allowed_themes_str = DI::config()->get('system', 'allowed_themes');
$allowed_themes_raw = explode(',', str_replace(' ', '', $allowed_themes_str));
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$allowed_themes = [];
if (count($allowed_themes_raw)) {
foreach ($allowed_themes_raw as $theme) {
$theme = Strings::sanitizeFilePathItem(trim($theme));
if (strlen($theme) && is_dir("view/theme/$theme")) {
$allowed_themes[] = $theme;
}
}
}
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return array_unique($allowed_themes);
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}
public static function setAllowedList(array $allowed_themes)
{
DI::config()->set('system', 'allowed_themes', implode(',', array_unique($allowed_themes)));
}
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/**
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* Parse theme comment in search of theme infos.
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*
* like
* \code
* ..* Name: My Theme
* * Description: My Cool Theme
* . * Version: 1.2.3
* * Author: John <profile url>
* * Maintainer: Jane <profile url>
* *
* \endcode
* @param string $theme the name of the theme
* @return array
*/
public static function getInfo($theme)
{
$theme = Strings::sanitizeFilePathItem($theme);
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$info = [
'name' => $theme,
'description' => "",
'author' => [],
'maintainer' => [],
'version' => "",
'credits' => "",
'experimental' => file_exists("view/theme/$theme/experimental"),
'unsupported' => file_exists("view/theme/$theme/unsupported")
];
if (!is_file("view/theme/$theme/theme.php")) {
return $info;
}
$stamp1 = microtime(true);
$theme_file = file_get_contents("view/theme/$theme/theme.php");
DI::profiler()->saveTimestamp($stamp1, "file", System::callstack());
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$result = preg_match("|/\*.*\*/|msU", $theme_file, $matches);
if ($result) {
$comment_lines = explode("\n", $matches[0]);
foreach ($comment_lines as $comment_line) {
$comment_line = trim($comment_line, "\t\n\r */");
if ($comment_line != "") {
list($key, $value) = array_map("trim", explode(":", $comment_line, 2));
$key = strtolower($key);
if ($key == "author") {
$result = preg_match("|([^<]+)<([^>]+)>|", $value, $matches);
if ($result) {
$info['author'][] = ['name' => $matches[1], 'link' => $matches[2]];
} else {
$info['author'][] = ['name' => $value];
}
} elseif ($key == "maintainer") {
$result = preg_match("|([^<]+)<([^>]+)>|", $value, $matches);
if ($result) {
$info['maintainer'][] = ['name' => $matches[1], 'link' => $matches[2]];
} else {
$info['maintainer'][] = ['name' => $value];
}
} elseif (array_key_exists($key, $info)) {
$info[$key] = $value;
}
}
}
}
return $info;
}
/**
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* Returns the theme's screenshot.
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*
* The screenshot is expected as view/theme/$theme/screenshot.[png|jpg].
*
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* @param string $theme The name of the theme
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* @return string
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
public static function getScreenshot($theme)
{
$theme = Strings::sanitizeFilePathItem($theme);
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$exts = ['.png', '.jpg'];
foreach ($exts as $ext) {
if (file_exists('view/theme/' . $theme . '/screenshot' . $ext)) {
return DI::baseUrl() . '/view/theme/' . $theme . '/screenshot' . $ext;
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}
}
return DI::baseUrl() . '/images/blank.png';
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}
public static function uninstall($theme)
{
$theme = Strings::sanitizeFilePathItem($theme);
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// silently fail if theme was removed or if $theme is funky
if (file_exists("view/theme/$theme/theme.php")) {
include_once "view/theme/$theme/theme.php";
$func = "{$theme}_uninstall";
if (function_exists($func)) {
$func();
}
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}
$allowed_themes = Theme::getAllowedList();
$key = array_search($theme, $allowed_themes);
if ($key !== false) {
unset($allowed_themes[$key]);
Theme::setAllowedList($allowed_themes);
}
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}
public static function install($theme)
{
$theme = Strings::sanitizeFilePathItem($theme);
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// silently fail if theme was removed or if $theme is funky
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if (!file_exists("view/theme/$theme/theme.php")) {
return false;
}
try {
include_once "view/theme/$theme/theme.php";
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$func = "{$theme}_install";
if (function_exists($func)) {
$func();
}
$allowed_themes = Theme::getAllowedList();
$allowed_themes[] = $theme;
Theme::setAllowedList($allowed_themes);
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return true;
} catch (\Exception $e) {
Logger::error('Theme installation failed', ['theme' => $theme, 'error' => $e->getMessage()]);
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return false;
}
}
/**
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* Get the full path to relevant theme files by filename
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*
* This function searches in order in the current theme directory, in the current theme parent directory, and lastly
* in the base view/ folder.
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*
* @param string $file Filename
* @return string Path to the file or empty string if the file isn't found
* @throws \Exception
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*/
public static function getPathForFile($file)
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{
$a = DI::app();
$theme = $a->getCurrentTheme();
$parent = Strings::sanitizeFilePathItem($a->theme_info['extends'] ?? $theme);
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$paths = [
"view/theme/$theme/$file",
"view/theme/$parent/$file",
"view/$file",
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];
foreach ($paths as $path) {
if (file_exists($path)) {
return $path;
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}
}
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return '';
}
/**
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* Return relative path to theme stylesheet file
*
* Provide a sane default if nothing is chosen or the specified theme does not exist.
*
* @param string $theme Theme name
*
* @return string
*/
public static function getStylesheetPath($theme)
{
$theme = Strings::sanitizeFilePathItem($theme);
if (!file_exists('view/theme/' . $theme . '/style.php')) {
return 'view/theme/' . $theme . '/style.css';
}
$a = DI::app();
$query_params = [];
$puid = Profile::getThemeUid($a);
if ($puid) {
$query_params['puid'] = $puid;
}
return 'view/theme/' . $theme . '/style.pcss' . (!empty($query_params) ? '?' . http_build_query($query_params) : '');
}
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/**
* Returns the path of the provided theme
*
* @param $theme
* @return string|null
*/
public static function getConfigFile($theme)
{
$theme = Strings::sanitizeFilePathItem($theme);
$a = DI::app();
$base_theme = $a->theme_info['extends'] ?? '';
if (file_exists("view/theme/$theme/config.php")) {
return "view/theme/$theme/config.php";
}
if ($base_theme && file_exists("view/theme/$base_theme/config.php")) {
return "view/theme/$base_theme/config.php";
}
return null;
}
/**
* Returns the background color of the provided theme if available.
*
* @param string $theme
* @param int|null $uid Current logged-in user id
* @return string|null
*/
public static function getBackgroundColor(string $theme, $uid = null)
{
$theme = Strings::sanitizeFilePathItem($theme);
$return = null;
// silently fail if theme was removed or if $theme is funky
if (file_exists("view/theme/$theme/theme.php")) {
include_once "view/theme/$theme/theme.php";
$func = "{$theme}_get_background_color";
if (function_exists($func)) {
$return = $func($uid);
}
}
return $return;
}
/**
* Returns the theme color of the provided theme if available.
*
* @param string $theme
* @param int|null $uid Current logged-in user id
* @return string|null
*/
public static function getThemeColor(string $theme, int $uid = null)
{
$theme = Strings::sanitizeFilePathItem($theme);
$return = null;
// silently fail if theme was removed or if $theme is funky
if (file_exists("view/theme/$theme/theme.php")) {
include_once "view/theme/$theme/theme.php";
$func = "{$theme}_get_theme_color";
if (function_exists($func)) {
$return = $func($uid);
}
}
return $return;
}
}