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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="http://buddypress.trac.wordpress.org/changeset/10336">10336</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"http://buddypress.trac.wordpress.org/changeset/10336","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>boonebgorges</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-11-11 03:52:32 +0000 (Wed, 11 Nov 2015)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Improve sanitization of email notification settings.

Port of <a href="http://buddypress.trac.wordpress.org/changeset/10329">[10329]</a> to the 2.0 branch.

Props boonebgorges, johnjamesjacoby, imath, dcavins.
See <a href="http://buddypress.trac.wordpress.org/ticket/6707">#6707</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branches20bpsettingsbpsettingsactionsphp">branches/2.0/bp-settings/bp-settings-actions.php</a></li>
<li><a href="#branches20bpsettingsbpsettingsfunctionsphp">branches/2.0/bp-settings/bp-settings-functions.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="branches20bpsettingsbpsettingsactionsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/2.0/bp-settings/bp-settings-actions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/2.0/bp-settings/bp-settings-actions.php  2015-11-11 03:47:12 UTC (rev 10335)
+++ branches/2.0/bp-settings/bp-settings-actions.php    2015-11-11 03:52:32 UTC (rev 10336)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -238,11 +238,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        check_admin_referer( 'bp_settings_notifications' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( isset( $_POST['notifications'] ) ) {
-               foreach ( (array) $_POST['notifications'] as $key => $value ) {
-                       bp_update_user_meta( (int) bp_displayed_user_id(), $key, $value );
-               }
-       }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ bp_settings_update_notification_settings( bp_displayed_user_id(), (array) $_POST['notifications'] );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        // Switch feedback for super admins
</span><span class="cx" style="display: block; padding: 0 10px">        if ( bp_is_my_profile() ) {
</span></span></pre></div>
<a id="branches20bpsettingsbpsettingsfunctionsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/2.0/bp-settings/bp-settings-functions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/2.0/bp-settings/bp-settings-functions.php        2015-11-11 03:47:12 UTC (rev 10335)
+++ branches/2.0/bp-settings/bp-settings-functions.php  2015-11-11 03:52:32 UTC (rev 10336)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -9,3 +9,97 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> // Exit if accessed directly
</span><span class="cx" style="display: block; padding: 0 10px"> if ( !defined( 'ABSPATH' ) ) exit;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+/**
+ * Update email notification settings for a specific user.
+ *
+ * @since 2.0.4
+ *
+ * @param int   $user_id  ID of the user whose settings are being updated.
+ * @param array $settings Settings array.
+ */
+function bp_settings_update_notification_settings( $user_id, $settings ) {
+       $user_id = (int) $user_id;
+
+       $settings = bp_settings_sanitize_notification_settings( $settings );
+       foreach ( $settings as $setting_key => $setting_value ) {
+               bp_update_user_meta( $user_id, $setting_key, $setting_value );
+       }
+}
+
+/**
+ * Sanitize email notification settings as submitted by a user.
+ *
+ * @since 2.0.4
+ *
+ * @param array $settings Array of settings.
+ * @return array Sanitized settings.
+ */
+function bp_settings_sanitize_notification_settings( $settings = array() ) {
+       $sanitized_settings = array();
+
+       if ( empty( $settings ) ) {
+               return $sanitized_settings;
+       }
+
+       // Get registered notification keys.
+       $registered_notification_settings = bp_settings_get_registered_notification_keys();
+
+       /*
+        * We sanitize values for core notification keys.
+        *
+        * @todo use register_meta()
+        */
+       $core_notification_settings = array(
+               'notification_messages_new_message',
+               'notification_activity_new_mention',
+               'notification_activity_new_reply',
+               'notification_groups_invite',
+               'notification_groups_group_updated',
+               'notification_groups_admin_promotion',
+               'notification_groups_membership_request',
+               'notification_membership_request_completed',
+               'notification_friends_friendship_request',
+               'notification_friends_friendship_accepted',
+       );
+
+       foreach ( (array) $settings as $key => $value ) {
+               // Skip if not a registered setting.
+               if ( ! in_array( $key, $registered_notification_settings, true ) ) {
+                       continue;
+               }
+
+               // Force core keys to 'yes' or 'no' values.
+               if ( in_array( $key, $core_notification_settings, true ) ) {
+                       $value = 'yes' === $value ? 'yes' : 'no';
+               }
+
+               $sanitized_settings[ $key ] = $value;
+       }
+
+       return $sanitized_settings;
+}
+
+/**
+ * Build a dynamic whitelist of notification keys, based on what's hooked to 'bp_notification_settings'.
+ *
+ * @since 2.0.4
+ *
+ * @return array
+ */
+function bp_settings_get_registered_notification_keys() {
+
+       ob_start();
+       do_action( 'bp_notification_settings' );
+       $screen = ob_get_clean();
+
+       $matched = preg_match_all( '/<input[^>]+name="notifications\[([^\]]+)\]/', $screen, $matches );
+
+       if ( $matched && isset( $matches[1] ) ) {
+               $key_whitelist = $matches[1];
+       } else {
+               $key_whitelist = array();
+       }
+
+       return $key_whitelist;
+}
</ins></span></pre>
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