feedwordpress / compatability.php

compatability.php in FeedWordPress 2021.0713, at compatability.php

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1	<?php
2	################################################################################
3	## LEGACY API: Replicate or mock up functions for legacy support purposes ######
4	################################################################################
5
6	class FeedWordPressCompatibility {
7
8	/**
9	* FeedWordPressCompatibility::test_version: test version of WordPress
10	* based on the database schema version.
11	*
12	* @param int $floor The minimum version necessary
13	* @param mixed $ceiling The first version that is too high. If omitted
14	* or NULL, no version is too high.
15	* @return bool TRUE if within the range of versions, FALSE if too low
16	* or too high.
17	*/
18	static function test_version ($floor, $ceiling = null) {
19	global $wp_db_version;
20
21	$ver = (isset($wp_db_version) ? $wp_db_version : 0);
22	$good = ($ver >= $floor);
23	if (!is_null($ceiling)) :
24	$good = ($good and ($ver < $ceiling));
25	endif;
26	return $good;
27	} /* FeedWordPressCompatibility::test_version() */
28
29	static function insert_link_category ($name) {
30	global $wpdb;
31
32	// WordPress 2.3+ term/taxonomy API
33	$term = wp_insert_term($name, 'link_category');
34
35	// OK: returned array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id)
36	if (!is_wp_error($term)) :
37	$cat_id = $term['term_id'];
38
39	// Error: term with this name already exists. Well, let's use that then.
40	elseif ($term->get_error_code() == 'term_exists') :
41	// Already-existing term ID is returned in data field
42	$cat_id = $term->get_error_data('term_exists');
43
44	// Error: another kind of error, harder to recover from. Return WP_Error.
45	else :
46	$cat_id = $term;
47	endif;
48
49	// Return newly-created category ID
50	return $cat_id;
51	} /* FeedWordPressCompatibility::insert_link_category () */
52
53	static function link_category_id ($value, $key = 'cat_name') {
54	global $wpdb;
55
56	$cat_id = NULL;
57
58	$the_term = term_exists($value, 'link_category');
59
60	// Sometimes, in some versions, we get a row
61	if (is_array($the_term)) :
62	$cat_id = $the_term['term_id'];
63
64	// other times we get an integer result
65	else :
66	$cat_id = $the_term;
67	endif;
68
69	return $cat_id;
70	} /* FeedWordPressCompatibility::link_category_id () */
71
72	static function validate_http_request ($action = -1, $capability = null) {
73	// Only worry about this if we're using a method with significant side-effects
74	if (strtoupper($_SERVER['REQUEST_METHOD']) == 'POST') :
75	// Limit post by user capabilities
76	if (!is_null($capability) and !current_user_can($capability)) :
77	wp_die(__('Cheatin’ uh?'));
78	endif;
79
80	// If check_admin_referer() checks a nonce.
81	if (function_exists('wp_verify_nonce')) :
82	check_admin_referer($action);
83
84	// No nonces means no checking nonces.
85	else :
86	check_admin_referer();
87	endif;
88	endif;
89	} /* FeedWordPressCompatibility::validate_http_request() */
90
91	static function stamp_nonce ($action = -1) {
92	// stamp form with hidden fields for a nonce in WP 2.0.3 & later
93	if (function_exists('wp_nonce_field')) :
94	wp_nonce_field($action);
95	endif;
96	} /* FeedWordPressCompatibility::stamp_nonce() */
97
98	static function bottom_script_hook ($filename) {
99	global $fwp_path;
100
101	$hook = 'admin_footer-'.$fwp_path.'/'.basename($filename);
102	return $hook;
103	} /* FeedWordPressCompatibility::bottom_script_hook() */
104	} /* class FeedWordPressCompatibility */
105
106	// Compat
107
108	if (!function_exists('set_post_field')) {
109
110	/**
111	* Update data from a post field based on Post ID
112	*
113	* Examples of the post field will be, 'post_type', 'post_status', 'post_content', etc.
114	*
115	* The context values are based off of the taxonomy filter functions and
116	* supported values are found within those functions.
117	*
118	* @uses sanitize_post_field()
119	*
120	* @param string $field Post field name
121	* @param mixed $value New value for post field
122	* @param id $post Post ID
123	* @return bool Result of UPDATE query
124	*
125	* Included under terms of GPL from WordPress Ticket #10946 <http://core.trac.wordpress.org/attachment/ticket/10946/post.php.diff>
126	*/
127	function set_post_field ($field, $value, $post_id) {
128	global $wpdb;
129
130	$post_id = absint($post_id);
131	// sigh ... when FWP is active, I need to avoid avoid_kses_munge
132	// $value = sanitize_post_field($field, $value, $post_id, 'db');
133	return $wpdb->update($wpdb->posts, array($field => $value), array('ID' => $post_id));
134	} /* function set_post_field () */
135
136	} /* if */
137
138	if (!function_exists('is_countable')) {
139
140	// Copied from WordPress 5.3.2 wp-includes/compat.php pursuant to terms
141	// of GPL. Provide support for is_countable() for versions of PHP < 7.3
142	// and for versions of WordPress < 4.9.6. -C.J. 2020/01/24
143
144	/**
145	* Polyfill for is_countable() function added in PHP 7.3.
146	*
147	* Verify that the content of a variable is an array or an object
148	* implementing the Countable interface.
149	*
150	* @since 4.9.6
151	*
152	* @param mixed $var The value to check.
153	*
154	* @return bool True if `$var` is countable, false otherwise.
155	*/
156	function is_countable( $var ) {
157	return ( is_array( $var )
158	\|\| $var instanceof Countable
159	\|\| $var instanceof SimpleXMLElement
160	\|\| $var instanceof ResourceBundle
161	);
162	}
163
164	} /* if */
165
166	require_once(dirname(__FILE__).'/feedwordpress-walker-category-checklist.class.php');
167
168	function fwp_category_checklist ($post_id = 0, $descendents_and_self = 0, $selected_cats = false, $params = array()) {
169	if (is_string($params)) :
170	$prefix = $params;
171	$taxonomy = 'category';
172	elseif (is_array($params)) :
173	$prefix = (isset($params['prefix']) ? $params['prefix'] : '');
174	$taxonomy = (isset($params['taxonomy']) ? $params['taxonomy'] : 'category');
175	endif;
176
177	$walker = new FeedWordPress_Walker_Category_Checklist($params);
178	$walker->set_prefix($prefix);
179	$walker->set_taxonomy($taxonomy);
180	wp_terms_checklist(/post_id=/ $post_id, array(
181	'taxonomy' => $taxonomy,
182	'descendents_and_self' => $descendents_and_self,
183	'selected_cats' => $selected_cats,
184	'popular_cats' => false,
185	'walker' => $walker,
186	'checked_ontop' => true,
187	));
188	}
189
190	function fwp_time_elapsed ($ts) {
191	if (function_exists('human_time_diff')) :
192	if ($ts >= time()) :
193	$ret = __(human_time_diff($ts)." from now");
194	else :
195	$ret = __(human_time_diff($ts)." ago");
196	endif;
197	else :
198	$ret = strftime('%x %X', $ts);
199	endif;
200	return $ret;
201	}
202
203	################################################################################
204	## UPGRADE INTERFACE: Have users upgrade DB from older versions of FWP #########
205	################################################################################
206
207	function fwp_upgrade_page () {
208	if (MyPHP::post('action')=='Upgrade') :
209	$ver = get_option('feedwordpress_version');
210	if (get_option('feedwordpress_version') != FEEDWORDPRESS_VERSION) :
211	echo "<div class=\"wrap\">\n";
212	echo "<h2>Upgrading FeedWordPress...</h2>";
213
214	$feedwordpress = new FeedWordPress;
215	$feedwordpress->upgrade_database($ver);
216	echo "<p><strong>Done!</strong> Upgraded database to version ".FEEDWORDPRESS_VERSION.".</p>\n";
217	echo "<form action=\"\" method=\"get\">\n";
218	echo "<div class=\"submit\"><input type=\"hidden\" name=\"page\" value=\"syndication.php\" />";
219	echo "<input type=\"submit\" value=\"Continue »\" /></form></div>\n";
220	echo "</div>\n";
221	return;
222	else :
223	echo "<div class=\"updated\"><p>Already at version ".FEEDWORDPRESS_VERSION."!</p></div>";
224	endif;
225	endif;
226	?>
227	<div class="wrap">
228	<h2>Upgrade FeedWordPress</h2>
229
230	<p>It appears that you have installed FeedWordPress
231	<?php echo FEEDWORDPRESS_VERSION; ?> as an upgrade to an existing installation of
232	FeedWordPress. That's no problem, but you will need to take a minute out first
233	to upgrade your database: some necessary changes in how the software keeps
234	track of posts and feeds will cause problems such as duplicate posts and broken
235	templates if we were to continue without the upgrade.</p>
236
237	<p>Note that most of FeedWordPress's functionality is temporarily disabled
238	until we have successfully completed the upgrade. Everything should begin
239	working as normal again once the upgrade is complete. There's extraordinarily
240	little chance of any damage as the result of the upgrade, but if you're paranoid
241	like me you may want to back up your database before you proceed.</p>
242
243	<p>This may take several minutes for a large installation.</p>
244
245	<form action="" method="post">
246	<?php FeedWordPressCompatibility::stamp_nonce('feedwordpress_upgrade'); ?>
247	<div class="submit"><input type="submit" name="action" value="Upgrade" /></div>
248	</form>
249	</div>
250	<?php
251	} // function fwp_upgrade_page ()
252
253	function remove_dummy_zero ($var) {
254	return !(is_numeric($var) and ((int) $var == 0));
255	}
256
257