bbpress / includes / core / abstraction.php

abstraction.php in bbPress 2.6.6, at includes/core/abstraction.php

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1	<?php
2
3	/**
4	* bbPress Abstractions
5	*
6	* This file contains functions for abstracting WordPress core functionality
7	* into convenient wrappers so they can be used more reliably.
8	*
9	* Many of the functions in this file are considered superfluous by
10	* WordPress coding standards, but they're handy for plugins of plugins to use.
11	*
12	* @package bbPress
13	* @subpackage Core
14	*/
15
16	// Exit if accessed directly
17	defined( 'ABSPATH' ) \|\| exit;
18
19	/**
20	* Setup Admin
21	*
22	* This exists outside of "/includes/admin/" because the converter may need to
23	* be setup to convert the passwords of users that were migrated from another
24	* forum platform.
25	*
26	* @since 2.6.0 bbPress (r2596)
27	*/
28	function bbp_setup_admin() {
29	$bbp = bbpress();
30
31	// Skip if already setup
32	if ( empty( $bbp->admin ) ) {
33
34	// Require the admin class
35	require_once $bbp->includes_dir . 'admin/classes/class-bbp-admin.php';
36
37	// Setup
38	$bbp->admin = class_exists( 'BBP_Admin' )
39	? new BBP_Admin()
40	: new stdClass();
41	}
42
43	// Return the admin object
44	return $bbp->admin;
45	}
46
47	/**
48	* Setup Converter
49	*
50	* This exists outside of "/includes/admin/" because the converter may need to
51	* be setup to convert the passwords of users that were migrated from another
52	* forum platform.
53	*
54	* @since 2.6.0 bbPress (r2596)
55	*/
56	function bbp_setup_converter() {
57	$bbp_admin = bbp_setup_admin();
58
59	// Skip if already setup
60	if ( empty( $bbp_admin->converter ) ) {
61
62	// Require the converter files
63	require_once $bbp_admin->admin_dir . 'tools/converter.php';
64	require_once $bbp_admin->admin_dir . 'classes/class-bbp-converter.php';
65	require_once $bbp_admin->admin_dir . 'classes/class-bbp-converter-db.php';
66	require_once $bbp_admin->admin_dir . 'classes/class-bbp-converter-base.php';
67
68	// Setup
69	$bbp_admin->converter = class_exists( 'BBP_Converter' )
70	? new BBP_Converter()
71	: new stdClass();
72	}
73
74	// Return the converter
75	return $bbp_admin->converter;
76	}
77
78	/ Globals *****************************************************************/
79
80	/**
81	* Lookup and return a global variable
82	*
83	* @since 2.5.8 bbPress (r5814)
84	*
85	* @param string $name Name of global variable
86	* @param string $type Type of variable to check with `is_a()`
87	* @param mixed $default Default value to return if no global found
88	*
89	* @return mixed Verified object if valid, Default or null if invalid
90	*/
91	function bbp_get_global_object( $name = '', $type = '', $default = null ) {
92
93	// If no name passed
94	if ( empty( $name ) ) {
95	$retval = $default;
96
97	// If no global exists
98	} elseif ( ! isset( $GLOBALS[ $name ] ) ) {
99	$retval = $default;
100
101	// If not the correct type of global
102	} elseif ( ! empty( $type ) && ! is_a( $GLOBALS[ $name ], $type ) ) {
103	$retval = $default;
104
105	// Global variable exists
106	} else {
107	$retval = $GLOBALS[ $name ];
108	}
109
110	// Filter & return
111	return apply_filters( 'bbp_get_global_object', $retval, $name, $type, $default );
112	}
113
114	/**
115	* Get the `$wp_query` global without needing to declare it everywhere
116	*
117	* @since 2.6.0 bbPress (r6582)
118	*
119	* @return WP_Roles
120	*/
121	function bbp_get_wp_query() {
122	return bbp_get_global_object( 'wp_query', 'WP_Query' );
123	}
124
125	/**
126	* Get the `$wp_roles` global without needing to declare it everywhere
127	*
128	* @since 2.2.0 bbPress (r4293)
129	*
130	* @return WP_Roles
131	*/
132	function bbp_get_wp_roles() {
133	return bbp_get_global_object( 'wp_roles', 'WP_Roles' );
134	}
135
136	/**
137	* Return the database class being used to interface with the environment.
138	*
139	* This function is abstracted to avoid global touches to the primary database
140	* class. bbPress supports WordPress's `$wpdb` global by default, and can be
141	* filtered to support other configurations if needed.
142	*
143	* @since 2.5.8 bbPress (r5814)
144	*
145	* @return object
146	*/
147	function bbp_db() {
148	return bbp_get_global_object( 'wpdb', 'WPDB' );
149	}
150
151	/ Pagination **************************************************************/
152
153	/**
154	* Return the rewrite rules class being used to interact with URLs.
155	*
156	* This function is abstracted to avoid global touches to the primary rewrite
157	* rules class. bbPress supports WordPress's `$wp_rewrite` by default, but can
158	* be filtered to support other configurations if needed.
159	*
160	* @since 2.5.8 bbPress (r5814)
161	*
162	* @return object
163	*/
164	function bbp_rewrite() {
165	return bbp_get_global_object( 'wp_rewrite', 'WP_Rewrite', (object) array(
166	'root' => '',
167	'pagination_base' => 'page',
168	) );
169	}
170
171	/**
172	* Get the root URL
173	*
174	* @since 2.5.8 bbPress (r5814)
175	*
176	* @return string
177	*/
178	function bbp_get_root_url() {
179
180	// Default
181	$retval = '';
182	$rewrite = bbp_rewrite();
183
184	// Use $wp_rewrite->root if available
185	if ( property_exists( $rewrite, 'root' ) ) {
186	$retval = $rewrite->root;
187	}
188
189	// Filter & return
190	return apply_filters( 'bbp_get_root_url', $retval );
191	}
192
193	/**
194	* Get the slug used for paginated requests
195	*
196	* @since 2.4.0 bbPress (r4926)
197	*
198	* @return string
199	*/
200	function bbp_get_paged_slug() {
201
202	// Default
203	$retval = 'page';
204	$rewrite = bbp_rewrite();
205
206	// Use $wp_rewrite->pagination_base if available
207	if ( property_exists( $rewrite, 'pagination_base' ) ) {
208	$retval = $rewrite->pagination_base;
209	}
210
211	// Filter & return
212	return apply_filters( 'bbp_get_paged_slug', $retval );
213	}
214
215	/**
216	* Is the environment using pretty URLs?
217	*
218	* @since 2.5.8 bbPress (r5814)
219	*
220	* @global object $wp_rewrite The WP_Rewrite object
221	*
222	* @return bool
223	*/
224	function bbp_use_pretty_urls() {
225
226	// Default
227	$retval = false;
228	$rewrite = bbp_rewrite();
229
230	// Use $wp_rewrite->using_permalinks() if available
231	if ( method_exists( $rewrite, 'using_permalinks' ) ) {
232	$retval = $rewrite->using_permalinks();
233	}
234
235	// Filter & return
236	return apply_filters( 'bbp_pretty_urls', $retval );
237	}
238
239	/**
240	* Remove the first-page from a pagination links result set, ensuring that it
241	* points to the canonical first page URL.
242	*
243	* This is a bit of an SEO hack, to guarantee that the first page in a loop will
244	* never have pagination appended to the end of it, regardless of what the other
245	* functions have decided for us.
246	*
247	* @since 2.6.0 bbPress (r6678)
248	*
249	* @param string $pagination_links The HTML links used for pagination
250	*
251	* @return string
252	*/
253	function bbp_make_first_page_canonical( $pagination_links = '' ) {
254
255	// Default value
256	$retval = $pagination_links;
257
258	// Remove first page from pagination
259	if ( ! empty( $pagination_links ) ) {
260	$retval = bbp_use_pretty_urls()
261	? str_replace( bbp_get_paged_slug() . '/1/', '', $pagination_links )
262	: preg_replace( '/&paged=1(?=[^0-9])/m', '', $pagination_links );
263	}
264
265	// Filter & return
266	return apply_filters( 'bbp_make_first_page_canonical', $retval, $pagination_links );
267	}
268
269	/**
270	* A convenient wrapper for common calls to paginate_links(), complete with
271	* support for parameters that aren't used internally by bbPress.
272	*
273	* @since 2.6.0 bbPress (r6679)
274	*
275	* @param array $args
276	*
277	* @return string
278	*/
279	function bbp_paginate_links( $args = array() ) {
280
281	// Maybe add view-all args
282	$add_args = empty( $args['add_args'] ) && bbp_get_view_all()
283	? array( 'view' => 'all' )
284	: false;
285
286	// Pagination settings with filter
287	$r = bbp_parse_args( $args, array(
288
289	// Used by callers
290	'base' => '',
291	'total' => 1,
292	'current' => bbp_get_paged(),
293	'prev_next' => true,
294	'prev_text' => is_rtl() ? '→' : '←',
295	'next_text' => is_rtl() ? '←' : '→',
296	'mid_size' => 1,
297	'end_size' => 3,
298	'add_args' => $add_args,
299
300	// Unused by callers
301	'show_all' => false,
302	'type' => 'plain',
303	'format' => '',
304	'add_fragment' => '',
305	'before_page_number' => '',
306	'after_page_number' => ''
307	), 'paginate_links' );
308
309	// Return paginated links
310	return bbp_make_first_page_canonical( paginate_links( $r ) );
311	}
312
313	/**
314	* Parse the WordPress core version number
315	*
316	* @since 2.6.0 bbPress (r6051)
317	*
318	* @global string $wp_version
319	*
320	* @return string $wp_version
321	*/
322	function bbp_get_major_wp_version() {
323	global $wp_version;
324
325	return (float) $wp_version;
326	}
327
328	/ Multisite ***************************************************************/
329
330	/**
331	* Is this a large bbPress installation?
332	*
333	* @since 2.6.0 bbPress (r6242)
334	*
335	* @return bool True if more than 10000 users, false not
336	*/
337	function bbp_is_large_install() {
338
339	// Multisite has a function specifically for this
340	$retval = function_exists( 'wp_is_large_network' )
341	? wp_is_large_network( 'users' )
342	: ( bbp_get_total_users() > 10000 );
343
344	// Filter & return
345	return (bool) apply_filters( 'bbp_is_large_install', $retval );
346	}
347
348	/**
349	* Get the total number of users on the forums
350	*
351	* @since 2.0.0 bbPress (r2769)
352	*
353	* @return int Total number of users
354	*/
355	function bbp_get_total_users() {
356	$bbp_db = bbp_db();
357	$count = $bbp_db->get_var( "SELECT COUNT(ID) as c FROM {$bbp_db->users} WHERE user_status = '0'" );
358
359	// Filter & return
360	return (int) apply_filters( 'bbp_get_total_users', (int) $count );
361	}
362
363	/**
364	* Switch to a site in a multisite installation.
365	*
366	* If not a multisite installation, no switching will occur.
367	*
368	* @since 2.6.0 bbPress (r6733)
369	*
370	* @param int $site_id
371	*/
372	function bbp_switch_to_site( $site_id = 0 ) {
373
374	// Switch to a specific site
375	if ( is_multisite() ) {
376	switch_to_blog( $site_id );
377	}
378	}
379
380	/**
381	* Switch back to the original site in a multisite installation.
382	*
383	* If not a multisite installation, no switching will occur.
384	*
385	* @since 2.6.0 bbPress (r6733)
386	*/
387	function bbp_restore_current_site() {
388
389	// Switch back to the original site
390	if ( is_multisite() ) {
391	restore_current_blog();
392	}
393	}
394
395	/ Interception ************************************************************/
396
397	/**
398	* Generate a default intercept value.
399	*
400	* @since 2.6.0
401	*
402	* @staticvar mixed $rand Null by default, random string on first call
403	*
404	* @return string
405	*/
406	function bbp_default_intercept() {
407	static $rand = null;
408
409	// Generate a new random and unique string
410	if ( null === $rand ) {
411
412	// If ext/hash is not present, compat.php's hash_hmac() does not support sha256.
413	$algo = function_exists( 'hash' )
414	? 'sha256'
415	: 'sha1';
416
417	// Old WP installs may not have AUTH_SALT defined.
418	$salt = defined( 'AUTH_SALT' ) && AUTH_SALT
419	? AUTH_SALT
420	: (string) wp_rand();
421
422	// Create unique ID
423	$rand = hash_hmac( $algo, uniqid( $salt, true ), $salt );
424	}
425
426	// Return random string (from locally static variable)
427	return $rand;
428	}
429
430	/**
431	* Whether a value has been intercepted
432	*
433	* @since 2.6.0
434	*
435	* @param bool $value
436	*/
437	function bbp_is_intercepted( $value = '' ) {
438	return ( bbp_default_intercept() !== $value );
439	}
440
441	/**
442	* Allow interception of a method or function call.
443	*
444	* @since 2.6.0
445	*
446	* @param string $action Typically the name of the caller function
447	* @param array $args Typically the results of caller function func_get_args()
448	*
449	* @return mixed Intercept results. Default bbp_default_intercept().
450	*/
451	function bbp_maybe_intercept( $action = '', $args = array() ) {
452
453	// Backwards compatibility juggle
454	$hook = ( false === strpos( $action, 'pre_' ) )
455	? "pre_{$action}"
456	: $action;
457
458	// Default value
459	$default = bbp_default_intercept();
460
461	// Parse args
462	$r = bbp_parse_args( (array) $args, array(), 'maybe_intercept' );
463
464	// Bail if no args
465	if ( empty( $r ) ) {
466	return $default;
467	}
468
469	// Filter
470	$args = array_merge( array( $hook ), $r );
471	$filtered = call_user_func_array( 'apply_filters', $args );
472
473	// Return filtered value, or default if not intercepted
474	return ( $filtered === reset( $r ) )
475	? $default
476	: $filtered;
477	}
478
479	/ Date/Time ***************************************************************/
480
481	/**
482	* Get an empty datetime value.
483	*
484	* @since 2.6.6 bbPress (r7094)
485	*
486	* @return string
487	*/
488	function bbp_get_empty_datetime() {
489
490	// Get the database version
491	$db_version = bbp_db()->db_version();
492
493	// Default return value
494	$retval = '0000-00-00 00:00:00';
495
496	// Filter & return
497	return (string) apply_filters( 'bbp_get_default_zero_date', $retval, $db_version );
498	}
499