xspeed / includes / class-settings.php

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1	<?php
2	/**
3	* Settings handling.
4	*
5	* @package XSpeed
6	*/
7
8	namespace XSpeed;
9
10	defined( 'ABSPATH' ) \|\| exit;
11
12	class Settings {
13
14	const OPTION_KEY = 'xspeed_options';
15
16	/**
17	* Set by a plugin that installs xSpeed on a user's behalf, BEFORE it
18	* activates it.
19	*
20	* A plain option rather than a constant, a filter or a class: the host
21	* writes it at a moment when no xSpeed code has loaded and none can be
22	* relied on to exist, so `update_option( 'xspeed_installed_by', 'my-slug' )`
23	* is the whole contract. It survives into the activation request, which is
24	* where it is read.
25	*/
26	const INSTALLED_BY_OPTION = 'xspeed_installed_by';
27
28	/**
29	* Where the slug lives once activation has consumed it.
30	*
31	* The option above is a one-shot TRIGGER, not a record: it changes what
32	* activation does, so leaving it on disk means the next activation is a
33	* host install too. A host whose install fails between writing it and
34	* activating us would otherwise arm a plain user activation to write
35	* advanced-cache.php and edit wp-config.php — for ever. Activation moves
36	* the value here and deletes the trigger, so a stale one is spent by the
37	* first activation that sees it rather than every one after.
38	*/
39	const INSTALLER_OPTION = 'xspeed_installer';
40
41	/** Which profile a fresh install came up with. Read back by Host::status(). */
42	const PROFILE_OPTION = 'xspeed_install_profile';
43
44	/** Nothing was decided — the option already existed, so this is not a fresh install. */
45	const PROFILE_NONE = '';
46	/** A clear site the user installed themselves: the Balanced set. */
47	const PROFILE_RECOMMENDED = 'recommended';
48	/** Something else owns the page cache: everything off. */
49	const PROFILE_CONFLICT_SAFE = 'conflict-safe';
50	/** A clear site, installed by another plugin: everything off, page cache on. */
51	const PROFILE_HOST_PAGE_CACHE = 'host-page-cache';
52
53	public static function defaults() {
54	// Migrated out of this legacy blob (now per-module storage):
55	// - minify_html / minify_css / minify_js → xspeed_module_minify
56	// - gzip_enabled → xspeed_module_gzip
57	// - cache_expiry / excluded_urls → xspeed_module_cache
58	// Still here (intentionally, drop-in lifecycle):
59	// - cache_enabled (Cache::toggle owns the .htaccess/wp-config edit)
60	return array(
61	'cache_enabled' => false,
62	);
63	}
64
65	public static function get() {
66	$saved = get_option( self::OPTION_KEY, array() );
67	return wp_parse_args( $saved, self::defaults() );
68	}
69
70	public static function update( array $input ) {
71	$current = self::get();
72	$clean = $current;
73
74	// Every former field is now in per-module storage:
75	// - minify_* → MinifyModule, gzip_enabled → GzipModule,
76	// cache_expiry / excluded_urls → CacheModule.
77	// Only cache_enabled lives on here, owned by Cache::toggle's
78	// drop-in lifecycle. All other writes are silently ignored to
79	// keep duplicate sources from re-forming.
80	if ( isset( $input['cache_enabled'] ) ) {
81	$clean['cache_enabled'] = (bool) $input['cache_enabled'];
82	}
83
84	update_option( self::OPTION_KEY, $clean );
85	return $clean;
86	}
87
88	/**
89	* Decide how a fresh install comes up.
90	*
91	* @return string One of the PROFILE_* constants. PROFILE_NONE means this
92	* was not a fresh install and nothing was decided.
93	*/
94	public static function set_defaults(): string {
95	if ( false !== get_option( self::OPTION_KEY ) ) {
96	return self::PROFILE_NONE;
97	}
98
99	add_option( self::OPTION_KEY, self::defaults() );
100
101	/*
102	* Only a genuinely fresh install reaches this branch — the option
103	* survives deactivation, so an upgrade (deactivate → wipe → install →
104	* activate) always finds it present.
105	*
106	* Three ways a fresh install can come up.
107	*
108	* Something else owns the page cache: everything off. The user
109	* installed xSpeed beside a cache plugin they are still using, and
110	* rewriting their markup on activation is not what they asked for.
111	*
112	* Nothing owns it and another plugin installed us: everything off
113	* EXCEPT page caching. That plugin asked the user for site speed and
114	* installed us to provide it, so the cache is the one thing it may
115	* assume — and nothing else, because the user never saw our settings
116	* and did not ask for lazy loading or minification. It is also what
117	* the copy-vendored Setup wrote by hand before every host install, so
118	* this is that behaviour moving to the side that owns the settings.
119	*
120	* Nothing owns it and the user installed us themselves: the Balanced
121	* set, and they choose page caching in the wizard.
122	*/
123	$state = self::page_cache_occupant_state();
124	if ( null !== $state ) {
125	$written = self::apply_conflict_safe_profile();
126
127	/**
128	* Fires when a fresh install came up with everything switched off
129	* because something else owns the page cache.
130	*
131	* The host plugin that installed xSpeed uses this to tell the user
132	* what happened; nothing here renders a notice on its behalf.
133	*
134	* @param array $written Module slug => the fields set to false.
135	* @param string $state The detector's ownership state.
136	* @param string $host Whoever claimed the install, or ''.
137	*/
138	do_action( 'xspeed_conflict_profile_applied', $written, $state, self::installed_by() );
139	update_option( self::PROFILE_OPTION, self::PROFILE_CONFLICT_SAFE, false );
140	return self::PROFILE_CONFLICT_SAFE;
141	}
142
143	if ( '' !== self::installed_by() ) {
144	// The same sweep the occupied site gets — every Free bool off —
145	// because "the user did not ask for it" is the same fact in both
146	// cases. Only what happens to page caching differs, and that is
147	// Plugin::activate()'s call, not a settings write.
148	self::apply_conflict_safe_profile();
149	update_option( self::PROFILE_OPTION, self::PROFILE_HOST_PAGE_CACHE, false );
150	return self::PROFILE_HOST_PAGE_CACHE;
151	}
152
153	self::seed_recommended_modules();
154	update_option( self::PROFILE_OPTION, self::PROFILE_RECOMMENDED, false );
155	return self::PROFILE_RECOMMENDED;
156	}
157
158	/** Which profile the fresh install came up with, or '' if we never decided. */
159	public static function install_profile(): string {
160	$profile = get_option( self::PROFILE_OPTION, self::PROFILE_NONE );
161	return is_string( $profile ) ? $profile : self::PROFILE_NONE;
162	}
163
164	/**
165	* Who installed xSpeed, or '' when the user did it themselves.
166	*
167	* A slug the host plugin chose — 'essential-addons', 'templately'. Not
168	* validated against a list: this is provenance for a message, never an
169	* authorization, and a host we have never heard of is still allowed to
170	* say who it is.
171	*/
172	public static function installed_by(): string {
173	$recorded = get_option( self::INSTALLER_OPTION, '' );
174	if ( is_string( $recorded ) && '' !== $recorded ) {
175	return sanitize_key( $recorded );
176	}
177	$slug = get_option( self::INSTALLED_BY_OPTION, '' );
178	return is_string( $slug ) ? sanitize_key( $slug ) : '';
179	}
180
181	/**
182	* Spend the trigger: record who installed us, and clear the arming option.
183	*
184	* Called once, by Plugin::activate(), after the profile is decided — the
185	* decision reads the trigger, so it cannot be cleared before then.
186	*
187	* @param string $profile The Settings::PROFILE_* this activation chose.
188	*/
189	public static function consume_installed_by( string $profile ): void {
190	$slug = get_option( self::INSTALLED_BY_OPTION, '' );
191	$slug = is_string( $slug ) ? sanitize_key( $slug ) : '';
192
193	if ( '' !== $slug && self::PROFILE_NONE !== $profile ) {
194	// A fresh install someone claimed. Worth keeping: it is what
195	// Host::status() reports and what support reads to know whether a
196	// site's settings were chosen by a person.
197	update_option( self::INSTALLER_OPTION, $slug, false );
198	}
199
200	delete_option( self::INSTALLED_BY_OPTION );
201	}
202
203	/**
204	* Does something other than xSpeed own this site's page cache?
205	*
206	* Deliberately NOT `! can_acquire()`. That helper refuses on anything it
207	* cannot verify, which is right for a write that could destroy another
208	* plugin's drop-in — but wrong for choosing a settings profile. An
209	* unreadable wp-config.php would then hand an ordinary site an xSpeed with
210	* every optimisation off and nothing on screen to explain it.
211	*
212	* So this asks the narrower question: is there positive evidence of
213	* somebody else? `unavailable` is not evidence, and neither is a residual
214	* artifact from a plugin that is gone. The write paths keep failing closed
215	* on both.
216	*
217	* `unknown-occupied` counts only when a drop-in is actually there. The
218	* same state also covers `WP_CACHE` left true in wp-config.php with no
219	* drop-in at all — a line a removed cache plugin forgot — and nothing is
220	* serving cached pages then. Treating that as an occupant gave a clean
221	* site an xSpeed with every switch off while the wizard said "No other
222	* caching plugins detected" (PR #295 review). The write path still refuses
223	* it, because it cannot know what set the constant.
224	*/
225	private static function page_cache_occupant_state(): ?string {
226	if ( ! class_exists( __NAMESPACE__ . '\\Page_Cache_Detector' ) ) {
227	return null;
228	}
229
230	$report = Page_Cache_Detector::inspect();
231	$state = Page_Cache_Detector::classify( $report )['state'];
232
233	if ( Page_Cache_Detector::STATE_UNKNOWN_OCCUPIED === $state ) {
234	return ! empty( $report['dropin']['exists'] ) ? $state : null;
235	}
236
237	return in_array(
238	$state,
239	array(
240	Page_Cache_Detector::STATE_FOREIGN_LIVE,
241	Page_Cache_Detector::STATE_POSSIBLE_LIVE,
242	Page_Cache_Detector::STATE_CONTESTED,
243	),
244	true
245	) ? $state : null;
246	}
247
248	/**
249	* Settings a fresh install starts with, beyond each module's schema
250	* default. Mirrors the wizard's "Balanced" preset — the profile the
251	* product already labels "Recommended for most sites".
252	*
253	* Why this exists: the wizard is skippable, and a WP-CLI or bulk
254	* activation never shows it at all. Those users fell through to the raw
255	* schema defaults, which are more conservative than what we recommend to
256	* the very same site — so whether a site compressed its responses came
257	* down to whether someone clicked through a wizard. Measured on a real
258	* install: gzip off, browser-cache headers off, no minification, while
259	* lazy-load and resource hints (schema default `true`) were on.
260	*
261	* Deliberately excluded: `minify_js`, `defer_js`, `combine_css`,
262	* `combine_js`, `delay_js`. Each can break a theme, and a default that
263	* breaks the site is worse than a default that is merely slow. They stay
264	* opt-in via the wizard's Aggressive preset or the dashboard.
265	*
266	* Public because the portable Setup copy mirrors it: these four are
267	* written by activation rather than declared as schema defaults, so
268	* scanning the schemas alone misses the four settings a user is most
269	* likely to notice.
270	*
271	* @return array<string,array<string,bool>> module slug => settings
272	*/
273	public static function recommended_module_settings(): array {
274	return array(
275	// Compression — the single largest byte win, and inert until a
276	// server actually supports it (GzipModule writes .htaccess only
277	// where supports_htaccess() is true, and emits a snippet
278	// otherwise).
279	'gzip' => array( 'gzip_enabled' => true ),
280	// Far-future caching for static assets. Only ever affects
281	// css/js/images/fonts; HTML keeps its own short TTL.
282	'browser-cache' => array( 'enabled' => true ),
283	// HTML + CSS minification. Both are whitespace/comment-level
284	// and do not reorder or combine anything, so they carry none of
285	// the cascade risk that combine_css does.
286	'minify' => array(
287	'minify_html' => true,
288	'minify_css' => true,
289	),
290	);
291	}
292
293	/**
294	* The settings a site gets when something else owns the page cache.
295	*
296	* Refusing the page cache is only half of "install beside a caching plugin
297	* and do nothing". Two things put the other half back on:
298	*
299	* - recommended_module_settings() above, which activation writes TRUE;
300	* - an ABSENT option row, which is not off. Settings_Manager merges each
301	* module's schema defaults, so `lazy` with no row reads back with four
302	* switches ON, and resource-hints, fonts and preloader likewise.
303	*
304	* So this is composed from the live registry rather than a hand-kept list:
305	* every bool of every registered FREE module, minus what that module names
306	* in Module::conflict_safe_exempt(). Every bool, not only the ones
307	* defaulting on — a default that moves in a later release must not switch
308	* something on behind the user.
309	*
310	* Pro is out of scope: its modules sit behind a licence and their own
311	* enable switches, and writing rows for a plugin that may never be
312	* installed would record decisions on someone else's behalf.
313	*
314	* @return array<string,array<string,bool>> module slug => field => false
315	*/
316	public static function conflict_safe_profile(): array {
317	$out = array();
318
319	foreach ( self::registered_modules() as $slug => $module ) {
320	if ( Module::TIER_FREE !== $module::TIER ) {
321	continue;
322	}
323
324	$exempt = $module->conflict_safe_exempt();
325
326	foreach ( $module->settings_schema() as $field => $spec ) {
327	if ( 'bool' !== ( $spec['type'] ?? '' ) \|\| in_array( $field, $exempt, true ) ) {
328	continue;
329	}
330	$out[ $slug ][ $field ] = false;
331	}
332	}
333
334	// The sweep above already covers these as ordinary bools. Naming them
335	// again keeps the two lists in step if the recommended profile ever
336	// grows a field no schema declares.
337	foreach ( self::recommended_module_settings() as $slug => $values ) {
338	foreach ( array_keys( $values ) as $field ) {
339	$out[ $slug ][ $field ] = false;
340	}
341	}
342
343	ksort( $out );
344	foreach ( $out as $slug => $values ) {
345	ksort( $values );
346	$out[ $slug ] = $values;
347	}
348
349	return $out;
350	}
351
352	/**
353	* Write that profile, preserving every key it does not name.
354	*
355	* Merged rather than replaced: option rows outlive plugin deletion, so a
356	* site can still carry lazy-load exclusions or a preloader sitemap from an
357	* earlier install, and there is no reason to destroy those to turn
358	* switches off.
359	*
360	* @return array<string,array<string,bool>> What was written, by slug.
361	*/
362	public static function apply_conflict_safe_profile(): array {
363	$written = array();
364
365	foreach ( self::conflict_safe_profile() as $slug => $values ) {
366	$option = 'xspeed_module_' . $slug;
367	$stored = get_option( $option, null );
368	$stored = is_array( $stored ) ? $stored : array();
369	$next = array_merge( $stored, $values );
370
371	if ( $next === $stored ) {
372	continue;
373	}
374
375	update_option( $option, $next, false );
376	$written[ $slug ] = $values;
377	}
378
379	return $written;
380	}
381
382	/**
383	* Every registered module, registering them first when the registry is
384	* empty.
385	*
386	* On the activation request nothing has registered yet, and an empty
387	* registry would compose an empty profile — a silent pass that leaves
388	* every switch on. Firing `xspeed_register_modules` from here was not
389	* enough: init() never ran on that request, so Free's own callback was
390	* not on the action and the firing registered nothing. Plugin owns the
391	* repair — see Plugin::ensure_modules_registered().
392	*
393	* That repair fires the action once per request. Reaching this before
394	* plugins_loaded(20) from anywhere other than activation would register
395	* Free and lock every add-on out for the request; activation is the only
396	* caller, and it must stay that way.
397	*
398	* @return array<string,Module>
399	*/
400	private static function registered_modules(): array {
401	$modules = Module_Registry::all();
402	if ( ! empty( $modules ) ) {
403	return $modules;
404	}
405
406	Plugin::instance()->ensure_modules_registered();
407
408	return Module_Registry::all();
409	}
410
411	/**
412	* Write the recommended defaults for a fresh install, without ever
413	* overwriting a value the user has already chosen.
414	*
415	* Each key is written only when it is absent from stored settings, so
416	* this stays safe if it is ever reached on a site that has some — but
417	* not all — module options saved.
418	*/
419	private static function seed_recommended_modules(): void {
420	foreach ( self::recommended_module_settings() as $slug => $values ) {
421	$key = 'xspeed_module_' . $slug;
422	$stored = get_option( $key, null );
423	$stored = is_array( $stored ) ? $stored : array();
424
425	$next = $stored;
426	foreach ( $values as $setting => $value ) {
427	if ( array_key_exists( $setting, $stored ) \|\| self::seed_is_refused( $slug, $setting ) ) {
428	continue;
429	}
430	$next[ $setting ] = $value;
431	}
432	if ( $next !== $stored ) {
433	update_option( $key, $next, false );
434	}
435	}
436	}
437
438	/**
439	* Would the dashboard refuse this setting right now?
440	*
441	* A recommended seed is a switch the user never touched, so it must not
442	* turn on what the conflict matrix would refuse to let them turn on: a
443	* fresh install beside Autoptimize seeded HTML and CSS minification while
444	* the same request could already say "Autoptimize is active and handles
445	* the same feature" (PR #295 review). Only settings with a feature key in
446	* the matrix are checked; compression and browser caching have none.
447	*/
448	private static function seed_is_refused( string $slug, string $setting ): bool {
449	$keys = array(
450	'minify' => array(
451	'minify_html' => 'minify.html',
452	'minify_css' => 'minify.css',
453	),
454	);
455	$feature = $keys[ $slug ][ $setting ] ?? null;
456	if ( null === $feature \|\| ! class_exists( __NAMESPACE__ . '\\Conflict_Registry' ) ) {
457	return false;
458	}
459	return Conflict_Registry::STRATEGY_REFUSE === Conflict_Registry::strategy_for( $feature );
460	}
461
462	// sanitize_urls() removed — excluded_urls now owned by CacheModule
463	// and validated by Settings_Manager's typed schema (list / item_type).
464	}
465