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<?php |
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|
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/** |
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* Admin live-preview REST controller. |
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* |
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* Renders the admin's live preview by loading the site's REAL frontend homepage |
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* inside an iframe with the *unsaved* settings applied — the same approach Chat |
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* Help Pro uses to preview the real frontend widget, adapted to Darkify, whose |
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* "frontend output" is the entire dark-moded page rather than a single widget. |
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* |
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* Flow: |
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* 1. The admin SPA POSTs the current (unsaved) form values here. They are |
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* sanitized, merged over the real saved `darkify` option, and stored in a |
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* short-lived per-user transient — NEVER written to the real option. |
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* 2. The iframe requests the homepage with `?darkify_preview=<nonce>`. On that |
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* one request, `maybe_enable_preview()` filters `option_darkify` to return |
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* the transient's merged values, so Darkify's normal frontend code renders |
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* the page exactly as it would once the settings were saved. |
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* |
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* Because the override is (a) read-only, (b) scoped to a single nonce-verified |
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* request from a `manage_options` user, and (c) applied only to that user's own |
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* transient, it changes nothing persistent and is invisible to every other |
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* visitor and request — full backward compatibility. |
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* |
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* @package darkify |
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* @subpackage darkify/src/Admin/Rest |
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* @author ThemeAtelier<themeatelierbd@gmail.com> |
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*/ |
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|
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namespace ThemeAtelier\Darkify\Admin\Rest; |
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|
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use WP_REST_Server; |
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use WP_REST_Request; |
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use WP_REST_Response; |
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|
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if (! defined('ABSPATH')) { |
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die; |
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} |
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|
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class PreviewRest extends AbstractRestController |
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{ |
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/** The option key the preview drives (Darkify stores everything here). */ |
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const OPTION_KEY = 'darkify'; |
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|
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/** Query var the iframe carries to request a preview render. */ |
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const PREVIEW_QUERY_VAR = 'darkify_preview'; |
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|
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/** Nonce action guarding the preview render. */ |
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const PREVIEW_NONCE_ACTION = 'darkify_preview'; |
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|
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/** Transient lifetime — long enough for an editing session, short enough to |
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* self-clean. Refreshed on every preview POST. */ |
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const PREVIEW_TTL = HOUR_IN_SECONDS; |
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|
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public function __construct() |
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{ |
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parent::__construct(); |
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// Runs on EVERY request (this controller is constructed in the plugin |
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// boot, not only in wp-admin), so it can catch the frontend iframe |
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// request and swap in the preview values before Darkify's frontend |
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// reads the option. |
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\add_action('init', [$this, 'maybe_enable_preview']); |
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} |
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|
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public function register_routes(): void |
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{ |
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\register_rest_route(self::NS, '/preview', [ |
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'methods' => WP_REST_Server::CREATABLE, |
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'callback' => [$this, 'store_preview'], |
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'permission_callback' => [$this, 'can_manage'], |
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]); |
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} |
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|
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/** Per-user transient key so one admin's preview never leaks into another's. */ |
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private function transient_key(int $user_id): string |
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{ |
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return 'darkify_admin_preview_' . $user_id; |
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} |
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|
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/** |
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* POST /preview — sanitize + merge the unsaved values over the saved option |
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* and stash them in the current user's transient. Returns the URL the iframe |
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* should load. Never persists to the real option. |
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*/ |
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public function store_preview(WP_REST_Request $request): WP_REST_Response |
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{ |
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$user_id = \get_current_user_id(); |
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if (! $user_id) { |
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return new WP_REST_Response(['message' => \__('Not allowed.', 'darkify')], 403); |
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} |
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|
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$incoming = $request->get_param('values'); |
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$incoming = \is_array($incoming) ? $incoming : []; |
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|
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$sections = $this->get_registered_sections(self::OPTION_KEY); |
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$type_map = $this->collect_field_types($sections); |
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$sanitized = $this->sanitize_values($incoming, $type_map); |
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// Free plugin: the preview renders with Pro-locked values stripped too, |
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// so it always shows what the free frontend would actually do. |
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$sanitized = $this->strip_pro_keys($sanitized, $sections); |
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|
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$existing = \get_option(self::OPTION_KEY, []); |
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$existing = \is_array($existing) ? $existing : []; |
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$merged = \array_merge($existing, $sanitized); |
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|
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\set_transient($this->transient_key($user_id), $merged, self::PREVIEW_TTL); |
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|
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return \rest_ensure_response([ |
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'ok' => true, |
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'url' => $this->preview_url(), |
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]); |
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} |
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|
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/** The homepage URL carrying the preview nonce. */ |
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public function preview_url(): string |
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{ |
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return \add_query_arg( |
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self::PREVIEW_QUERY_VAR, |
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\wp_create_nonce(self::PREVIEW_NONCE_ACTION), |
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\home_url('/') |
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); |
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} |
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|
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/** |
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* On a valid preview request, make Darkify's frontend read the unsaved |
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* preview values instead of the saved option — for this request only. |
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*/ |
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public function maybe_enable_preview(): void |
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{ |
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// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- nonce verified on the next line. |
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$token = isset($_GET[self::PREVIEW_QUERY_VAR]) ? \sanitize_text_field(\wp_unslash($_GET[self::PREVIEW_QUERY_VAR])) : ''; |
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if ($token === '' || ! \wp_verify_nonce($token, self::PREVIEW_NONCE_ACTION)) { |
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return; |
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} |
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if (! \is_user_logged_in() || ! \current_user_can('manage_options')) { |
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return; |
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} |
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|
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$preview = \get_transient($this->transient_key(\get_current_user_id())); |
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if (! \is_array($preview)) { |
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return; |
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} |
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|
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// The preview renders the frontend with the admin's *unsaved* settings |
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// and NO forced mode: it uses the exact same light/dark logic a real |
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// visitor would (this browser's stored toggle state, then the unsaved |
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// `enable_default_dark_mode` / OS-aware / time-based settings). So it |
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// starts in whatever mode the site actually would, and the admin can |
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// flip the in-preview switch just like on the front end — the switch |
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// icon then stays in sync because dark mode is never force-applied |
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// out-of-band. |
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\add_filter('option_' . self::OPTION_KEY, function () use ($preview) { |
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return $preview; |
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}, 99); |
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|
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// Tell the frontend engine this exact page load IS the admin's own Live |
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// Preview iframe — not a real third-party iframe embed on someone's page. |
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// This makes it behave like the TOP-LEVEL front end: the "Frontend Iframe |
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// Dark Mode" setting (which governs iframes NESTED WITHIN a page) can't |
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// suppress the engine on the previewed page itself. It does NOT force any |
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// mode — the light/dark state is still whatever the front end would show. |
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// See Frontend::darkify_early_iframe_guard() and the |
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// `darkify_is_admin_live_preview` JS flag in client_main.js's |
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// `_dkf_iframe_disabled` guard. |
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\add_filter('darkify_is_admin_live_preview', '__return_true'); |
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|
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// Keep the preview context when browsing INSIDE the iframe. Without |
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// this, clicking any link inside the preview navigates to a plain URL |
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// with no token, so this whole method no-ops for that page: it silently |
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// reverts to the SAVED settings, and — because a tokenless page in an |
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// iframe fails client_main.js's `_dkf_iframe_disabled` guard whenever |
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// "Frontend Iframe Dark Mode" is off — the engine switches itself off |
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// entirely and the page renders light. Carrying the token forward keeps |
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// the previewed page a preview. |
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\add_action('wp_head', [$this, 'print_preview_link_persistence'], 1); |
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|
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// A cleaner canvas: no admin bar overlapping the previewed page. |
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\add_filter('show_admin_bar', '__return_false'); |
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|
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// Strip other plugins' floating/overlay UI (chat widgets, cookie and |
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// consent banners, popups, announcement bars, …) from the preview only |
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// — see print_preview_overlay_filter() for why this is safe to do |
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// unconditionally for "any installed plugin" without touching the real |
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// frontend or the page's own layout/content. |
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\add_action('wp_head', [$this, 'print_preview_overlay_filter'], 1); |
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|
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// Mark the response so it is never cached by page caches / CDNs. |
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if (! \headers_sent()) { |
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\nocache_headers(); |
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} |
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} |
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|
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/** |
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* Carry the preview token across link clicks inside the preview iframe. |
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* |
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* Only ever registered from maybe_enable_preview(), so it prints on preview |
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* requests alone — a real visitor's page never sees it. |
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* |
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* A delegated listener rather than rewriting every `href`: it costs one |
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* handler regardless of page size and it also covers links a theme or |
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* plugin injects later. It defers to the page in every case where the click |
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* wasn't a plain same-tab navigation to another page of this site — |
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* modified clicks (new tab), `target`ed links, external hosts, in-page |
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* anchors, and anything a script already handled (`defaultPrevented`) are |
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* left completely alone. |
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*/ |
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public function print_preview_link_persistence(): void |
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{ |
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$var = \wp_json_encode(self::PREVIEW_QUERY_VAR); |
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$token = \wp_json_encode(\wp_create_nonce(self::PREVIEW_NONCE_ACTION)); |
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?> |
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<script type="text/javascript" class="darkify_preview_js"> |
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(function () { |
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var VAR = <?php echo $var; // phpcs:ignore WordPress.Security.EscapeOutput -- wp_json_encode output. ?>; |
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var TOKEN = <?php echo $token; // phpcs:ignore WordPress.Security.EscapeOutput -- wp_json_encode output. ?>; |
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document.addEventListener('click', function (e) { |
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if (e.defaultPrevented || e.button !== 0 || e.metaKey || e.ctrlKey || e.shiftKey || e.altKey) { |
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return; |
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} |
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var a = (e.target && e.target.closest) ? e.target.closest('a') : null; |
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if (!a || !a.getAttribute('href')) { |
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return; |
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} |
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if (a.hasAttribute('download') || (a.target && a.target !== '_self')) { |
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return; |
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} |
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var u; |
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try { |
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u = new URL(a.href, window.location.href); |
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} catch (err) { |
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return; |
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} |
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if (u.origin !== window.location.origin) { |
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return; |
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} |
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if (u.searchParams.get(VAR)) { |
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return; |
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} |
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/* Same page + hash only: let the browser jump the anchor. */ |
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if (u.pathname === window.location.pathname && u.search === window.location.search && u.hash) { |
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return; |
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} |
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u.searchParams.set(VAR, TOKEN); |
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e.preventDefault(); |
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window.location.href = u.toString(); |
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}); |
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}()); |
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</script> |
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<?php |
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} |
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|
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/** |
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* Hide third-party plugin overlay UI inside the preview iframe. |
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* |
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* Only ever registered from maybe_enable_preview(), i.e. only for this one |
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* nonce-verified preview request — never on a real visitor's page load — so |
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* this cannot affect the actual frontend. |
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* |
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* Two layers, because no single technique reliably catches "any installed |
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* plugin, not just named ones": |
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* |
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* 1. A CSS denylist of the id/class substrings the most common overlay |
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* categories (cookie/consent banners, chat widgets, popups/modals, |
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* sticky announcement bars) overwhelmingly use in the wild. Cheap, |
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* instant, and — being plain CSS — it also matches elements a plugin |
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* injects into the page *after* this prints (e.g. via its own |
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* wp_footer script), since the browser re-evaluates selectors as the |
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* DOM changes. |
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* 2. A small script that hides anything else `position: fixed` or |
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* `sticky` UNLESS it reads as an ordinary slim top bar (the shape a |
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* theme's own sticky header/nav takes) — the general fallback for |
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* overlay UI the CSS list didn't anticipate. It re-scans on a few |
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* delays and watches the DOM (MutationObserver, attached to |
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* `<html>` so it works even though this prints in `<head>` before |
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* `<body>` exists) to catch widgets that inject themselves late. |
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* |
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* Both explicitly exempt Darkify's own floating switch (`.darkify_switch`, |
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* `#darkify_switch_*` — see Darkify::switcher_wrapper()) and the admin |
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* bar, and neither touches in-flow page content, so the theme's real |
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* layout renders untouched. |
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*/ |
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public function print_preview_overlay_filter(): void |
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{ |
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?> |
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<style id="darkify-preview-overlay-filter"> |
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[id*="cookie" i]:not([class*="darkify" i]):not([id*="darkify" i]), |
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[class*="cookie" i]:not([class*="darkify" i]), |
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[id*="consent" i]:not([class*="darkify" i]), |
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[class*="consent" i]:not([class*="darkify" i]), |
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[id*="gdpr" i], [class*="gdpr" i], |
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[id*="cookielaw" i], [class*="cookielaw" i], |
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[id*="cky-consent" i], [class*="cky-" i], |
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[id*="chat-widget" i], [class*="chat-widget" i], |
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[id*="livechat" i], [class*="livechat" i], |
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[id*="tawk" i], [class*="tawk" i], |
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[id*="crisp-client" i], [id*="intercom" i], [class*="intercom-" i], |
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[id*="drift-frame" i], [id*="fc_frame" i], [id*="fc_widget" i], |
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[id*="hubspot-messages" i], [id*="zsiq" i], [class*="zsiq" i], |
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[id*="fb-customer-chat" i], [id*="messenger-chat" i], |
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[id*="whatsapp" i]:not([class*="darkify" i]):not([id*="darkify" i]), |
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[class*="whatsapp" i]:not([class*="darkify" i]), |
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[id*="popup" i]:not([class*="darkify" i]):not([id*="darkify" i]), |
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[class*="popup" i]:not([class*="darkify" i]), |
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[id*="modal" i]:not([class*="darkify" i]):not([id*="darkify" i]), |
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[class*="modal-overlay" i], |
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[class*="pum-" i], [id*="pum-" i], |
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[class*="elementor-popup-modal" i], |
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[class*="announcement-bar" i], [id*="hello-bar" i], [class*="hello-bar" i], |
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[class*="sticky-bar" i], [class*="notification-bar" i] |
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{ |
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display: none !important; |
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visibility: hidden !important; |
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pointer-events: none !important; |
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} |
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</style> |
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<script id="darkify-preview-overlay-script"> |
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(function () { |
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var KEEP_RE = /darkify|wpadminbar/i; |
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function isExempt(el) { |
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while (el && el.nodeType === 1) { |
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if (KEEP_RE.test(el.id || "") || KEEP_RE.test(el.className || "")) return true; |
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el = el.parentElement; |
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} |
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return false; |
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} |
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function maybeHide(el) { |
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if (!el || el.nodeType !== 1 || isExempt(el)) return; |
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var style; |
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try { style = getComputedStyle(el); } catch (e) { return; } |
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if (style.position !== "fixed" && style.position !== "sticky") return; |
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var rect = el.getBoundingClientRect(); |
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if (rect.width === 0 && rect.height === 0) return; |
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var vw = window.innerWidth || document.documentElement.clientWidth; |
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var vh = window.innerHeight || document.documentElement.clientHeight; |
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var coversViewport = rect.width >= vw * 0.6 && rect.height >= vh * 0.6; |
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var slimTopBar = rect.top <= 4 && rect.height <= 140; |
| 337 |
if (coversViewport || !slimTopBar) { |
| 338 |
el.style.setProperty("display", "none", "important"); |
| 339 |
} |
| 340 |
} |
| 341 |
function scan(root) { |
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if (root && root.querySelectorAll) { |
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root.querySelectorAll("*").forEach(maybeHide); |
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} |
| 345 |
} |
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function safeScan() { |
| 347 |
if (document.body) scan(document.body); |
| 348 |
} |
| 349 |
safeScan(); |
| 350 |
[300, 800, 1500, 3000].forEach(function (ms) { |
| 351 |
setTimeout(safeScan, ms); |
| 352 |
}); |
| 353 |
new MutationObserver(function (mutations) { |
| 354 |
mutations.forEach(function (m) { |
| 355 |
if (m.type === "childList") { |
| 356 |
m.addedNodes.forEach(function (node) { |
| 357 |
if (node.nodeType !== 1) return; |
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maybeHide(node); |
| 359 |
if (node.querySelectorAll) node.querySelectorAll("*").forEach(maybeHide); |
| 360 |
}); |
| 361 |
} else if (m.type === "attributes") { |
| 362 |
maybeHide(m.target); |
| 363 |
} |
| 364 |
}); |
| 365 |
}).observe(document.documentElement, { |
| 366 |
childList: true, |
| 367 |
subtree: true, |
| 368 |
attributes: true, |
| 369 |
attributeFilter: ["style", "class"], |
| 370 |
}); |
| 371 |
})(); |
| 372 |
</script> |
| 373 |
<?php |
| 374 |
} |
| 375 |
} |
| 376 |
|
