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 110815, 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 && ($_alternative = apply_filters ("ws_plugin__s2member_sp_access_link_gen_alternative", $sp_access_link, get_defined_vars ())) && strlen ($_alternative) < strlen ($sp_access_link))
53	return apply_filters ("ws_plugin__s2member_sp_access_link_gen", $_alternative, get_defined_vars ());
54	/**/
55	else if ($shrink && ($tinyurl = c_ws_plugin__s2member_utils_urls::remote ("http://tinyurl.com/api-create.php?url=" . rawurlencode ($sp_access_link))))
56	return apply_filters ("ws_plugin__s2member_sp_access_link_gen", $tinyurl . "#" . $_SERVER["HTTP_HOST"], get_defined_vars ());
57	/**/
58	else /* Else use the long one; tinyURL will fail when/if their server is down periodically. */
59	return apply_filters ("ws_plugin__s2member_sp_access_link_gen", $sp_access_link, get_defined_vars ());
60	}
61	/**/
62	return false;
63	}
64	/**
65	* Generates Specific Post/Page Access links via AJAX.
66	*
67	* @package s2Member\SP_Access
68	* @since 3.5
69	*
70	* @attaches-to: ``add_action("wp_ajax_ws_plugin__s2member_sp_access_link_via_ajax");``
71	*
72	* @return null Exits script execution after returning data for AJAX caller.
73	*/
74	public static function sp_access_link_via_ajax ()
75	{
76	do_action ("ws_plugin__s2member_before_sp_access_link_via_ajax", get_defined_vars ());
77	/**/
78	if (current_user_can ("create_users")) /* Check priveledges as well. */
79	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"]))
80	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 ());
81	/**/
82	exit (); /* Clean exit. */
83	}
84	/**
85	* Handles Specific Post/Page Access authentication.
86	*
87	* @package s2Member\SP_Access
88	* @since 3.5
89	*
90	* @param int\|str $sp_id Numeric Post/Page ID in WordPress®.
91	* @param bool $read_only Optional. Defaults to false. If ``$read_only = true``,
92	* no session cookies are set, no IP Restrictions are checked, and script execution is not exited on Link failure.
93	* In other words, with ``$read_only = true``, this function will simply return true or false.
94	* @return null\|bool Always returns true if access is indeed allowed in one way or another.
95	* If access is denied with ``$read_only = true`` simply return false.
96	* If access is denied with ``$read_only = false``, return false;
97	* but if a Specific Post/Page Access Link is currently being used,
98	* we exit with a warning about Access Link expiration instead.
99	*/
100	public static function sp_access ($sp_id = FALSE, $read_only = FALSE)
101	{
102	do_action ("ws_plugin__s2member_before_sp_access", get_defined_vars ());
103	/**/
104	$excluded = apply_filters ("ws_plugin__s2member_sp_access_excluded", false, get_defined_vars ());
105	/**/
106	if ($excluded \|\| current_user_can (apply_filters ("ws_plugin__s2member_sp_access_excluded_cap", "edit_posts", get_defined_vars ())))
107	return apply_filters ("ws_plugin__s2member_sp_access", true, get_defined_vars ());
108	/**/
109	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))))
110	{
111	foreach ($sp_access_values as $sp_access_value) /* Supports multiple access values in a session. */
112	{
113	if (is_array ($sp_access = preg_split ("/\:\.\:\\|\:\.\:/", c_ws_plugin__s2member_utils_encryption::decrypt ($sp_access_value))))
114	{
115	if (count ($sp_access) === 4 && $sp_access[0] === "sp_time_hours" && in_array ($sp_id, preg_split ("/[\r\n\t\s;,]+/", $sp_access[1])))
116	{
117	if ($sp_access[2] <= strtotime ("now") && ($sp_access[2] + ($sp_access[3] * 3600)) >= strtotime ("now"))
118	{
119	if (!$read_only && !empty ($_GET["s2member_sp_access"])) /* Cookie session. */
120	c_ws_plugin__s2member_sp_access::sp_access_session ($_GET["s2member_sp_access"]);
121	/**/
122	if ($read_only \|\| c_ws_plugin__s2member_ip_restrictions::ip_restrictions_ok ($_SERVER["REMOTE_ADDR"], $sp_access_value))
123	return apply_filters ("ws_plugin__s2member_sp_access", true, get_defined_vars ());
124	}
125	}
126	}
127	}
128	/**/
129	if (!$read_only && !empty ($_GET["s2member_sp_access"])) /* If this is a Specific Post/Page Link? */
130	{
131	echo '<strong>Your Link Expired:</strong><br />Please contact Support if you need assistance.';
132	/**/
133	exit (); /* $_GET["s2member_sp_access"] has expired. Or it is simply invalid. */
134	}
135	/**/
136	return apply_filters ("ws_plugin__s2member_sp_access", false, get_defined_vars ());
137	}
138	/**/
139	else
140	return apply_filters ("ws_plugin__s2member_sp_access", false, get_defined_vars ());
141	}
142	/**
143	* Handles Specific Post/Page sessions, by writing access values into a cookie.
144	*
145	* Can be used to add a new value to the session, and/or to return the current set of values in the session.
146	*
147	* @package s2Member\SP_Access
148	* @since 3.5
149	*
150	* @param str $add_sp_access_value Encrypted Specific Post/Page Access value.
151	* @return array Array of Specific Post/Page Access values.
152	*/
153	public static function sp_access_session ($add_sp_access_value = FALSE)
154	{
155	eval ('foreach(array_keys(get_defined_vars())as$__v)$__refs[$__v]=&$$__v;');
156	do_action ("ws_plugin__s2member_before_sp_access_session", get_defined_vars ());
157	unset ($__refs, $__v); /* Unset defined __refs, __v. */
158	/**/
159	$sp_access_values = (!empty ($_COOKIE["s2member_sp_access"])) ? preg_split ("/\:\.\:\\|\:\.\:/", $_COOKIE["s2member_sp_access"]) : array ();
160	/**/
161	if ($add_sp_access_value && !in_array ($add_sp_access_value, $sp_access_values)) /* If it's not in the session already. */
162	{
163	$sp_access_values[] = $add_sp_access_value; /* Add an access value, and update the delimited session cookie. */
164	$sp_access_values = array_unique ($sp_access_values); /* Keep this array unique; disallow double-stacking. */
165	/**/
166	$cookie = implode (":.:\|:.:", $sp_access_values); /* Implode the access values into a delimited string. */
167	$cookie = (strlen ($cookie) >= 4096) ? $add_sp_access_value : $cookie; /* Max cookie size is 4kbs. */
168	/**/
169	setcookie ("s2member_sp_access", $cookie, time () + 31556926, COOKIEPATH, COOKIE_DOMAIN) . setcookie ("s2member_sp_access", $cookie, time () + 31556926, SITECOOKIEPATH, COOKIE_DOMAIN) . ($_COOKIE["s2member_sp_access"] = $cookie);
170	/**/
171	eval ('foreach(array_keys(get_defined_vars())as$__v)$__refs[$__v]=&$$__v;');
172	do_action ("ws_plugin__s2member_during_sp_access_session", get_defined_vars ());
173	unset ($__refs, $__v); /* Unset defined __refs, __v. */
174	}
175	/**/
176	return apply_filters ("ws_plugin__s2member_sp_access_session", $sp_access_values, get_defined_vars ());
177	}
178	}
179	}
180	?>