mirror of
https://github.com/sbrl/Pepperminty-Wiki.git
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234 lines
13 KiB
PHP
234 lines
13 KiB
PHP
<?php
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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register_module([
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"name" => "Theme Gallery",
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"version" => "0.4.1",
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"author" => "Starbeamrainbowlabs",
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"description" => "Adds a theme gallery page and optional automatic theme updates. Contacts a remote server, where IP addresses are stored in automatic server logs for security and attack mitigation purposes.",
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"id" => "feature-theme-gallery",
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"code" => function() {
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global $settings, $env;
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/**
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* @api {get} ?action=theme-gallery Display the theme gallery
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* @apiName ThemeGallery
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* @apiGroup Utility
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* @apiPermission Moderator
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*/
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add_action("theme-gallery", function() {
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global $settings, $env;
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if(!$env->is_admin) {
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$errorMessage = "<p>You don't have permission to change $settings->sitename's theme.</p>\n";
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if(!$env->is_logged_in)
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$errorMessage .= "<p>You could try <a href='?action=login&returnto=%3Faction%3Dconfigure'>logging in</a>.</p>";
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else
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$errorMessage .= "<p>You could try <a href='?action=logout&returnto=%3Faction%3Dconfigure'>logging out</a> and then <a href='?action=login&returnto=%3Faction%3Dconfigure'>logging in</a> again with a different account that has the appropriate privileges.</a>.</p>";
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exit(page_renderer::render_main("Error - $settings->sitename", $errorMessage));
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}
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$gallery_urls = explode(" ", $settings->css_theme_gallery_index_url);
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if(!isset($_GET["load"]) || $_GET["load"] !== "yes") {
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$result = "<h1>Theme Gallery</h1>
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<p>Load the theme gallery? A HTTP request will be made to the following endpoints:</p>
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<ul>";
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foreach($gallery_urls as $url) {
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$result .= "<li><a href='".htmlentities($url)."'>".htmlentities($url)."</a></li>\n";
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}
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$result .= "</ul>
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<p>...with the following user agent string: <code>".htmlentities (ini_get("user_agent"))."</code></p>
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<p>No external HTTP requests will be made without your consent.</p>
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<p><a href='?action=theme-gallery&load=yes'>Ok, load the gallery</a>.</p>
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<p> <a href='javascript:history.back();'>Actually, take me back</a>.</p>";
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exit(page_renderer::render_main("Theme Gallery - $settings->sitename", $result));
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}
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$themes_available = [];
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foreach($gallery_urls as $url) {
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if(empty($url)) continue;
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$next_obj = json_decode(@file_get_contents($url));
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if(empty($next_obj)) {
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http_response_code(503);
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exit(page_renderer::render_main("Error - Theme Gallery - $settings->sitename", "<p>Error: Failed to download theme index file from <code>" . htmlentities($url) . "</code>."));
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}
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foreach($next_obj as $theme) {
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$theme->index_url = $url;
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$theme->root = dirname($url) . "/{$theme->id}";
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$theme->url = "{$theme->root}/theme.css";
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$theme->preview_large = "{$theme->root}/preview_large.png";
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$theme->preview_small = "{$theme->root}/preview_small.png";
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$themes_available[] = $theme;
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}
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}
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$sorter = new Collator("");
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usort($themes_available, function($a, $b) use ($sorter) : int {
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return $sorter->compare($a->name, $b->name);
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});
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$content = "<h1>Theme Gallery</h1>
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<p>$settings->sitename is currently using ".(strlen($settings->css_theme_autoupdate_url) > 0 ? "an external" : "the internal")." theme".(strlen($settings->css_theme_autoupdate_url) > 0 ? " (<a href='?action=theme-gallery-select&theme-selector=default-internal'>reset to the internal default theme</a>)" : "").".</p>
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<form method='get' action='index.php'>
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<input type='hidden' name='action' value='theme-gallery-select' />
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<div class='grid-large theme-list'>\n";
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foreach($themes_available as $theme) {
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$selected = $theme->id == $settings->css_theme_gallery_selected_id ? " selected" : "";
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$content .= "<div class='theme-item'>
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<a href='" . htmlentities($theme->preview_large) . "'><img src='" . htmlentities($theme->preview_small) . "' title='Click to enlarge' /></a><br />
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<input type='radio' id='" . htmlentities($theme->id) . "' name='theme-selector' value='" . htmlentities($theme->id) . "' required$selected />
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<label class='link-display-label' for='" . htmlentities($theme->id) . "'>" . htmlentities($theme->name) . "</label>
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<p>" . str_replace("\n", "</p>\n<p>", htmlentities($theme->description)) . "</p>
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<p>By <a href='" . htmlentities($theme->author_link) . "'>" . htmlentities($theme->author) . "</a> (<a href='" . htmlentities($theme->url) . "'>View CSS</a>, <a href='" . htmlentities($theme->index_url) . "'>View Index</a>)
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</div>";
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}
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$content .= "</div>
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<p><strong>Warning: If you've altered $settings->sitename's CSS by changing the value of the <code>css</code> setting, then your changes will be overwritten by clicking the button below! If necessary, move your changes to the <code>css_custom</code> setting first before continuing here.</strong></p>
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<input type='submit' class='large' value='Change Theme' />
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</form>";
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exit(page_renderer::render_main("Theme Gallery - $settings->sitename", "$content"));
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});
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/**
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* @api {get} ?action=theme-gallery-select&theme-selector=theme-id Set the site theme
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* @apiName ThemeGallerySelect
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* @apiGroup Utility
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* @apiPermission Moderator
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*
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* @apiParam {string} theme-selector The id of the theme to switch into, or 'default-internal' to switch back to the internal theme.
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*/
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add_action("theme-gallery-select", function() {
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global $env, $settings, $guiConfig;
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if(!$env->is_admin) {
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$errorMessage = "<p>You don't have permission to change $settings->sitename's theme.</p>\n";
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if(!$env->is_logged_in)
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$errorMessage .= "<p>You could try <a href='?action=login&returnto=%3Faction%3Dconfigure'>logging in</a>.</p>";
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else
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$errorMessage .= "<p>You could try <a href='?action=logout&returnto=%3Faction%3Dconfigure'>logging out</a> and then <a href='?action=login&returnto=%3Faction%3Dconfigure'>logging in</a> again with a different account that has the appropriate privileges.</a>.</p>";
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exit(page_renderer::render_main("Error - $settings->sitename", $errorMessage));
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}
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if(!isset($_GET["theme-selector"])) {
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http_response_code(400);
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exit(page_renderer::render_main("No theme selected - Error - $settings->sitename", "<p>Oops! Looks like you didn't select a theme. Try <a href='?action=theme-gallery'>going back</a> and selecting one.</p>"));
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}
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if($_GET["theme-selector"] === "default-internal") {
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$settings->css_theme_gallery_selected_id = $guiConfig->css_theme_gallery_selected_id->default;
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$settings->css_theme_autoupdate_url = $guiConfig->css_theme_autoupdate_url->default;
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$settings->css = $guiConfig->css->default;
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if(!save_settings()) {
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http_response_code(503);
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exit(page_renderer::render_main("Server error - $settings->sitename", "<p>Oops! $settings->sitename wasn't able to save the <code>peppermint.json</code> settings file back to disk. If you're the administrator, try checking the permissions on disk. If not, try contacting $settings->sitename's administrator, who's contact details can be found at the bottom of every page.</p>"));
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}
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exit(page_renderer::render_main("Theme reset - Theme Gallery - $settings->sitename", "<p>$settings->sitename's theme has been reset to the internal theme.</p>
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<p>Go to the <a href='?action=$settings->defaultaction'>homepage</a>.</p>"));
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}
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// Set the new theme's id
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$settings->css_theme_gallery_selected_id = $_GET["theme-selector"];
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$gallery_urls = explode(" ", $settings->css_theme_gallery_index_url);
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// Find the URL of the selected theme
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// FUTURE: Figure out a way to pass this information through the UI interface instead to avoid a re-download?
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$theme_autoupdate_url = null;
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foreach($gallery_urls as $url) {
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$next_index = json_decode(@file_get_contents($url));
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if(empty($next_index)) {
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error_log("[PeppermintyWiki/$settings->sitename/theme_gallery] Error: Failed to download theme index file from '$url' when setting the wiki theme.");
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continue;
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}
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foreach($next_index as $next_theme) {
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if($next_theme->id == $settings->css_theme_gallery_selected_id) {
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$theme_autoupdate_url = dirname($url) . "/{$next_theme->id}/theme.css";
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break;
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}
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}
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if($theme_autoupdate_url !== null) break;
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}
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if($theme_autoupdate_url === null) {
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http_response_code(503);
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exit(page_renderer::render_main("[PeppermintyWiki/$settings->sitename/theme_gallery] Failed to set theme - Error - $settings->sitename)", "<p>Oops! $settings->sitename couldn't find the theme you selected. Perhaps it has been changed or deleted, or perhaps there was an error during the download process.</p>
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<p>Try <a href='?action=theme-gallery'>heading back to the theme gallery</a> and trying again.</p>"));
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}
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$settings->css_theme_autoupdate_url = $theme_autoupdate_url;
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if(!theme_update(true)) {
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http_response_code(503);
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exit(page_renderer::render_main("Failed to download theme - $settings->sitename", "<p>Oops! $settings->sitename wasn't able to download the theme you selected. If you're the administrator, try checking the PHP server logs. If not, try contacting $settings->sitename's administrator, who's contact details can be found at the bottom of every page.</p>"));
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}
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// TODO: Add option to disable theme updates
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if(!save_settings()) {
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http_response_code(503);
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exit(page_renderer::render_main("Server error - $settings->sitename", "<p>Oops! $settings->sitename wasn't able to save the <code>peppermint.json</code> settings file back to disk. If you're the administrator, try checking the permissions on disk. If not, try contacting $settings->sitename's administrator, who's contact details can be found at the bottom of every page.</p>"));
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}
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http_response_code(200);
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exit(page_renderer::render_main("Theme Changed - $settings->sitename", "<p>$settings->sitename's theme was changed successfully to ".htmlentities($settings->css_theme_gallery_selected_id).".</p>
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<p>Go to the <a href='?action=$settings->defaultaction'>homepage</a>.</p>"));
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});
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if($env->is_admin) add_help_section("945-theme-gallery", "Changing the theme", "<p>$settings->sitename allows you to change the theme by selecting a theme from the public theme gallery. You can <a href='?action=theme-gallery'>visit the theme gallery</a> to take a look. The theme gallery does make a remote HTTP request, but a warning is displayed before this is performed. Once a theme is downloaded, occasional (but infrequent) HTTP requests are made to make sure it is up to date.</p>
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<p>Note that when using a theme from the theme gallery, the internal theme is disabled. There is a button to disable any loaded theme gallery theme though.</p>
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<p>The default theme has support for the <a href='https://starbeamrainbowlabs.com/blog/article.php?article=posts/353-prefers-color-scheme.html'><code>prefers-color-scheme</code></a> CSS media query, enabling it to be dark or light depending on your operating system preference.</p>");
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}
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]);
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/**
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* Updates the currently selected theme by fetching it from a remote url.
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* @param bool $force_update Whether to force an update - even if we've already updated recently.
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* @return bool Whether the update was sucessful. It might fail because of network issues, or the theme update requires a newer version of Pepperminty Wiki than is currently installed.
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*/
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function theme_update($force_update = false) : bool {
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global $version, $settings;
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// If there's no url to update from or updates are disabled, then we're done here
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if(empty($settings->css_theme_autoupdate_url) || $settings->css_theme_autoupdate_interval < 0)
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return true;
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// If it's not time for an update, then end here
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// ...unless we're supposed to force an update
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if(time() - $settings->css_theme_autoupdate_lastcheck < $settings->css_theme_autoupdate_interval || !$force_update)
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return true;
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// Fetch the new css
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$new_css = @file_get_contents($settings->css_theme_autoupdate_url);
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// Make sure it's valid
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if(empty($new_css)) {
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error_log("[PeppermintyWiki/$settings->sitename/theme_gallery] Error: Failed to update theme: Got an error while trying to download theme update from $settings->css_theme_autoupdate_url");
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return false;
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}
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// TODO: Check the hash against themeindex.json?
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$min_version_loc = strpos($new_css, "@minversion") + strlen("@minversion");
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$min_version = substr($new_css, $min_version_loc, strpos($new_css, "\n", $min_version_loc));
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if(version_compare($version, $min_version) == -1) {
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error_log("[PeppermintyWiki/$settings->sitename/theme_gallery] Error: Failed to update theme: $settings->css_theme_gallery_selected_id requires Pepperminty Wiki $min_version, but $version is installed.");
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return false;
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}
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// If the css is identical to the string we've got stored already, then no point in updating
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if($new_css == $settings->css)
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return true;
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$settings->css = $new_css;
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return save_settings();
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}
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?>
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