s2member / includes / classes / sp-access.inc.php

sp-access.inc.php in s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions 111003, at includes/classes/sp-access.inc.php

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1	<?php
2	/**
3	* Specific Post/Page Access routines.
4	*
5	* Copyright: © 2009-2011
6	* {@link http://www.websharks-inc.com/ WebSharks, Inc.}
7	* ( coded in the USA )
8	*
9	* Released under the terms of the GNU General Public License.
10	* You should have received a copy of the GNU General Public License,
11	* along with this software. In the main directory, see: /licensing/
12	* If not, see: {@link http://www.gnu.org/licenses/}.
13	*
14	* @package s2Member\SP_Access
15	* @since 3.5
16	*/
17	if (realpath (__FILE__) === realpath ($_SERVER["SCRIPT_FILENAME"]))
18	exit ("Do not access this file directly.");
19	/**/
20	if (!class_exists ("c_ws_plugin__s2member_sp_access"))
21	{
22	/**
23	* Specific Post/Page Access routines.
24	*
25	* @package s2Member\SP_Access
26	* @since 3.5
27	*/
28	class c_ws_plugin__s2member_sp_access
29	{
30	/**
31	* Generates Specific Post/Page Access links.
32	*
33	* @package s2Member\SP_Access
34	* @since 3.5
35	*
36	* @param str $sp_ids Comma-delimited list of Specific Post/Page IDs ( numerical ).
37	* @param int $hours Optional. An expiration time for this link, in hours. Defaults to `72`.
38	* @param bool $shrink Optional. Defaults to true. If false, the raw link will NOT be processed by the tinyURL API.
39	* @return str\|bool A Specific Post/Page Access Link, or false on failure.
40	*/
41	public static function sp_access_link_gen ($sp_ids = FALSE, $hours = 72, $shrink = TRUE)
42	{
43	eval ('foreach(array_keys(get_defined_vars())as$__v)$__refs[$__v]=&$$__v;');
44	do_action ("ws_plugin__s2member_before_sp_access_link_gen", get_defined_vars ());
45	unset ($__refs, $__v); /* Unset defined __refs, __v. */
46	/**/
47	if (($sp_ids = preg_replace ("/[^0-9;,]/", "", $sp_ids)) && ($leading_id = preg_replace ("/^([0-9]+)(.*?)$/", "$1", $sp_ids)) && $hours)
48	{
49	$sp_access = c_ws_plugin__s2member_utils_encryption::encrypt ("sp_time_hours:.:\|:.:" . $sp_ids . ":.:\|:.:" . strtotime ("now") . ":.:\|:.:" . $hours);
50	$sp_access_link = add_query_arg ("s2member_sp_access", urlencode ($sp_access), get_permalink ($leading_id));
51	/**/
52	if ($shrink && ($shorter_url = c_ws_plugin__s2member_utils_urls::shorten ($sp_access_link)))
53	return apply_filters ("ws_plugin__s2member_sp_access_link_gen", $shorter_url . "#" . $_SERVER["HTTP_HOST"], get_defined_vars ());
54	/**/
55	else /* Else use the long one; shortening may fail when/if an API server is down periodically. */
56	return apply_filters ("ws_plugin__s2member_sp_access_link_gen", $sp_access_link, get_defined_vars ());
57	}
58	/**/
59	return false;
60	}
61	/**
62	* Generates Specific Post/Page Access links via AJAX.
63	*
64	* @package s2Member\SP_Access
65	* @since 3.5
66	*
67	* @attaches-to: ``add_action("wp_ajax_ws_plugin__s2member_sp_access_link_via_ajax");``
68	*
69	* @return null Exits script execution after returning data for AJAX caller.
70	*/
71	public static function sp_access_link_via_ajax ()
72	{
73	do_action ("ws_plugin__s2member_before_sp_access_link_via_ajax", get_defined_vars ());
74	/**/
75	if (current_user_can ("create_users")) /* Check priveledges as well. */
76	if (!empty ($_POST["ws_plugin__s2member_sp_access_link_via_ajax"]) && ($nonce = $_POST["ws_plugin__s2member_sp_access_link_via_ajax"]) && wp_verify_nonce ($nonce, "ws-plugin--s2member-sp-access-link-via-ajax") && ($_p = c_ws_plugin__s2member_utils_strings::trim_deep (stripslashes_deep ($_POST))) && isset ($_p["s2member_sp_access_link_ids"], $_p["s2member_sp_access_link_hours"]))
77	echo apply_filters ("ws_plugin__s2member_sp_access_link_via_ajax", c_ws_plugin__s2member_sp_access::sp_access_link_gen ($_p["s2member_sp_access_link_ids"], $_p["s2member_sp_access_link_hours"]), get_defined_vars ());
78	/**/
79	exit (); /* Clean exit. */
80	}
81	/**
82	* Handles Specific Post/Page Access authentication.
83	*
84	* @package s2Member\SP_Access
85	* @since 3.5
86	*
87	* @param int\|str $sp_id Numeric Post/Page ID in WordPress®.
88	* @param bool $read_only Optional. Defaults to false. If ``$read_only = true``,
89	* no session cookies are set, no IP Restrictions are checked, and script execution is not exited on Link failure.
90	* In other words, with ``$read_only = true``, this function will simply return true or false.
91	* @return null\|bool Always returns true if access is indeed allowed in one way or another.
92	* If access is denied with ``$read_only = true`` simply return false.
93	* If access is denied with ``$read_only = false``, return false;
94	* but if a Specific Post/Page Access Link is currently being used,
95	* we exit with a warning about Access Link expiration instead.
96	*/
97	public static function sp_access ($sp_id = FALSE, $read_only = FALSE)
98	{
99	do_action ("ws_plugin__s2member_before_sp_access", get_defined_vars ());
100	/**/
101	$excluded = apply_filters ("ws_plugin__s2member_sp_access_excluded", false, get_defined_vars ());
102	/**/
103	if ($excluded \|\| current_user_can (apply_filters ("ws_plugin__s2member_sp_access_excluded_cap", "edit_posts", get_defined_vars ())))
104	return apply_filters ("ws_plugin__s2member_sp_access", true, get_defined_vars ());
105	/**/
106	else if ($sp_id && ((!empty ($_GET["s2member_sp_access"]) && is_array ($sp_access_values = (array)trim (stripslashes ($_GET["s2member_sp_access"])))) \|\| (is_array ($sp_access_values = c_ws_plugin__s2member_sp_access::sp_access_session ()) && !empty ($sp_access_values))))
107	{
108	foreach ($sp_access_values as $sp_access_value) /* Supports multiple access values in a session. */
109	{
110	if (is_array ($sp_access = preg_split ("/\:\.\:\\|\:\.\:/", c_ws_plugin__s2member_utils_encryption::decrypt ($sp_access_value))))
111	{
112	if (count ($sp_access) === 4 && $sp_access[0] === "sp_time_hours" && in_array ($sp_id, preg_split ("/[\r\n\t\s;,]+/", $sp_access[1])))
113	{
114	if ($sp_access[2] <= strtotime ("now") && ($sp_access[2] + ($sp_access[3] * 3600)) >= strtotime ("now"))
115	{
116	if (!$read_only && !empty ($_GET["s2member_sp_access"])) /* Cookie session. */
117	c_ws_plugin__s2member_sp_access::sp_access_session ($_GET["s2member_sp_access"]);
118	/**/
119	if ($read_only \|\| c_ws_plugin__s2member_ip_restrictions::ip_restrictions_ok ($_SERVER["REMOTE_ADDR"], $sp_access_value))
120	return apply_filters ("ws_plugin__s2member_sp_access", true, get_defined_vars ());
121	}
122	}
123	}
124	}
125	/**/
126	if (!$read_only && !empty ($_GET["s2member_sp_access"])) /* If this is a Specific Post/Page Link? */
127	{
128	echo _x ('<strong>Your Link Expired:</strong><br />Please contact Support if you need assistance.', "s2member-front", "s2member");
129	/**/
130	exit (); /* $_GET["s2member_sp_access"] has expired. Or it is simply invalid. */
131	}
132	/**/
133	return apply_filters ("ws_plugin__s2member_sp_access", false, get_defined_vars ());
134	}
135	/**/
136	else
137	return apply_filters ("ws_plugin__s2member_sp_access", false, get_defined_vars ());
138	}
139	/**
140	* Handles Specific Post/Page sessions, by writing access values into a cookie.
141	*
142	* Can be used to add a new value to the session, and/or to return the current set of values in the session.
143	*
144	* @package s2Member\SP_Access
145	* @since 3.5
146	*
147	* @param str $add_sp_access_value Encrypted Specific Post/Page Access value.
148	* @return array Array of Specific Post/Page Access values.
149	*/
150	public static function sp_access_session ($add_sp_access_value = FALSE)
151	{
152	eval ('foreach(array_keys(get_defined_vars())as$__v)$__refs[$__v]=&$$__v;');
153	do_action ("ws_plugin__s2member_before_sp_access_session", get_defined_vars ());
154	unset ($__refs, $__v); /* Unset defined __refs, __v. */
155	/**/
156	$sp_access_values = (!empty ($_COOKIE["s2member_sp_access"])) ? preg_split ("/\:\.\:\\|\:\.\:/", $_COOKIE["s2member_sp_access"]) : array ();
157	/**/
158	if ($add_sp_access_value && !in_array ($add_sp_access_value, $sp_access_values)) /* If it's not in the session already. */
159	{
160	$sp_access_values[] = $add_sp_access_value; /* Add an access value, and update the delimited session cookie. */
161	$sp_access_values = array_unique ($sp_access_values); /* Keep this array unique; disallow double-stacking. */
162	/**/
163	$cookie = implode (":.:\|:.:", $sp_access_values); /* Implode the access values into a delimited string. */
164	$cookie = (strlen ($cookie) >= 4096) ? $add_sp_access_value : $cookie; /* Max cookie size is 4kbs. */
165	/**/
166	setcookie ("s2member_sp_access", $cookie, time () + 31556926, COOKIEPATH, COOKIE_DOMAIN) . setcookie ("s2member_sp_access", $cookie, time () + 31556926, SITECOOKIEPATH, COOKIE_DOMAIN) . ($_COOKIE["s2member_sp_access"] = $cookie);
167	/**/
168	eval ('foreach(array_keys(get_defined_vars())as$__v)$__refs[$__v]=&$$__v;');
169	do_action ("ws_plugin__s2member_during_sp_access_session", get_defined_vars ());
170	unset ($__refs, $__v); /* Unset defined __refs, __v. */
171	}
172	/**/
173	return apply_filters ("ws_plugin__s2member_sp_access_session", $sp_access_values, get_defined_vars ());
174	}
175	}
176	}
177	?>