Ticket #4393: bp-activity-functions.php

<?php

/**
 * BuddyPress Activity Functions
 *
 * Functions for the Activity Streams component
 *
 * @package BuddyPress
 * @subpackage ActivityFunctions
 */

// Exit if accessed directly
if ( !defined( 'ABSPATH' ) ) exit;

/**
 * Checks $bp pages global and looks for directory page
 *
 * @since BuddyPress (1.5)
 *
 * @global object $bp BuddyPress global settings
 *
 * @return bool True if set, False if empty
 */
function bp_activity_has_directory() {
        global $bp;

        return (bool) !empty( $bp->pages->activity->id );
}

/**
 * Searches through the content of an activity item to locate usernames, designated by an @ sign
 *
 * @since BuddyPress (1.5)
 *
 * @param string $content The content of the activity, usually found in $activity->content
 *
 * @return bool|array $usernames Array of the found usernames that match existing users. False if no matches
 */
function bp_activity_find_mentions( $content ) {
        $pattern = '/[@]+([A-Za-z0-9-_\.@]+)\b/';
        preg_match_all( $pattern, $content, $usernames );

        // Make sure there's only one instance of each username
        if ( !$usernames = array_unique( $usernames[1] ) )
                return false;

        return $usernames;
}

/**
 * Resets a user's unread mentions list and count
 *
 * @since BuddyPress (1.5)
 *
 * @param int $user_id The id of the user whose unread mentions are being reset
 * @uses bp_delete_user_meta()
 */
function bp_activity_clear_new_mentions( $user_id ) {
        bp_delete_user_meta( $user_id, 'bp_new_mention_count' );
        bp_delete_user_meta( $user_id, 'bp_new_mentions' );
}

/**
 * Adjusts new mention count for mentioned users when activity items are deleted or created
 *
 * @since BuddyPress (1.5)
 *
 * @param int $activity_id The unique id for the activity item
 * @param string $action Can be 'delete' or 'add'. Defaults to 'add'
 *
 * @uses BP_Activity_Activity() {@link BP_Activity_Activity}
 * @uses bp_activity_find_mentions()
 * @uses bp_is_username_compatibility_mode()
 * @uses bp_core_get_userid_from_nicename()
 * @uses bp_get_user_meta()
 * @uses bp_update_user_meta()
 */
function bp_activity_adjust_mention_count( $activity_id, $action = 'add' ) {
        $activity = new BP_Activity_Activity( $activity_id );

        if ( $usernames = bp_activity_find_mentions( strip_tags( $activity->content ) ) ) {
                foreach( (array) $usernames as $username ) {
                        if ( bp_is_username_compatibility_mode() )
                                $user_id = username_exists( $username );
                        else
                                $user_id = bp_core_get_userid_from_nicename( $username );

                        if ( empty( $user_id ) )
                                continue;

                        // Adjust the mention list and count for the member
                        $new_mention_count = (int)bp_get_user_meta( $user_id, 'bp_new_mention_count', true );
                        if ( !$new_mentions = bp_get_user_meta( $user_id, 'bp_new_mentions', true ) )
                                $new_mentions = array();

                        switch ( $action ) {
                                case 'delete' :
                                        $key = array_search( $activity_id, $new_mentions );
                                        if ( $key !== false ) {
                                                unset( $new_mentions[$key] );
                                        }
                                        break;

                                case 'add' :
                                default :
                                        if ( !in_array( $activity_id, $new_mentions ) ) {
                                                $new_mentions[] = (int) $activity_id;
                                        }
                                        break;
                        }

                        // Get an updated mention count
                        $new_mention_count = count( $new_mentions );

                        // Resave the user_meta
                        bp_update_user_meta( $user_id, 'bp_new_mention_count', $new_mention_count );
                        bp_update_user_meta( $user_id, 'bp_new_mentions', $new_mentions );
                }
        }
}

/**
 * Formats notifications related to activity
 *
 * @since BuddyPress (1.5)
 *
 * @param string $action The type of activity item. Just 'new_at_mention' for now
 * @param int $item_id The activity id
 * @param int $secondary_item_id In the case of at-mentions, this is the mentioner's id
 * @param int $total_items The total number of notifications to format
 * @param string $format 'string' to get a BuddyBar-compatible notification, 'array' otherwise
 *
 * @uses bp_loggedin_user_domain()
 * @uses bp_get_activity_slug()
 * @uses bp_core_get_user_displayname()
 * @uses apply_filters() To call the 'bp_activity_multiple_at_mentions_notification' hook
 * @uses apply_filters() To call the 'bp_activity_single_at_mentions_notification' hook
 * @uses do_action() To call 'activity_format_notifications' hook
 *
 * @return string $return Formatted @mention notification
 */
function bp_activity_format_notifications( $action, $item_id, $secondary_item_id, $total_items, $format = 'string' ) {

        switch ( $action ) {
                case 'new_at_mention':
                        $activity_id      = $item_id;
                        $poster_user_id   = $secondary_item_id;
                        $at_mention_link  = bp_loggedin_user_domain() . bp_get_activity_slug() . '/mentions/';
                        $at_mention_title = sprintf( __( '@%s Mentions', 'buddypress' ), bp_get_loggedin_user_username() );

                        if ( (int) $total_items > 1 ) {
                                $text = sprintf( __( 'You have %1$d new mentions', 'buddypress' ), (int) $total_items );
                                $filter = 'bp_activity_multiple_at_mentions_notification';
                        } else {
                                $user_fullname = bp_core_get_user_displayname( $poster_user_id );
                                $text =  sprintf( __( '%1$s mentioned you', 'buddypress' ), $user_fullname );
                                $filter = 'bp_activity_single_at_mentions_notification';
                        }
                break;
        }

        if ( 'string' == $format ) {
                $return = apply_filters( $filter, '<a href="' . $at_mention_link . '" title="' . $at_mention_title . '">' . $text . '</a>', $at_mention_link, (int) $total_items, $activity_id, $poster_user_id );
        } else {
                $return = apply_filters( $filter, array(
                        'text' => $text,
                        'link' => $at_mention_link
                ), $at_mention_link, (int) $total_items, $activity_id, $poster_user_id );
        }

        do_action( 'activity_format_notifications', $action, $item_id, $secondary_item_id, $total_items );

        return $return;
}

/** Actions ******************************************************************/

/**
 * Sets the current action for a given activity stream location
 *
 * @since BuddyPress (1.1)
 *
 * @param string $component_id
 * @param string $key
 * @param string $value
 *
 * @global object $bp BuddyPress global settings
 * @uses apply_filters() To call the 'bp_activity_set_action' hook
 *
 * @return bool False if any param is empty, otherwise true
 */
function bp_activity_set_action( $component_id, $key, $value ) {
        global $bp;

        // Return false if any of the above values are not set
        if ( empty( $component_id ) || empty( $key ) || empty( $value ) )
                return false;

        // Set activity action
        if ( !isset( $bp->activity->actions ) || !is_object( $bp->activity->actions ) ) {
                $bp->activity->actions = new stdClass;
        }

        if ( !isset( $bp->activity->actions->{$component_id} ) || !is_object( $bp->activity->actions->{$component_id} ) ) {
                $bp->activity->actions->{$component_id} = new stdClass;
        }

        $bp->activity->actions->{$component_id}->{$key} = apply_filters( 'bp_activity_set_action', array(
                'key'   => $key,
                'value' => $value
        ), $component_id, $key, $value );

        return true;
}

/**
 * Retreives the current action from a component and key
 *
 * @since BuddyPress (1.1)
 *
 * @param string $component_id
 * @param string $key
 *
 * @global object $bp BuddyPress global settings
 * @uses apply_filters() To call the 'bp_activity_get_action' hook
 *
 * @return mixed False on error, action on success
 */
function bp_activity_get_action( $component_id, $key ) {
        global $bp;

        // Return false if any of the above values are not set
        if ( empty( $component_id ) || empty( $key ) )
                return false;

        return apply_filters( 'bp_activity_get_action', $bp->activity->actions->{$component_id}->{$key}, $component_id, $key );
}

/** Favorites ****************************************************************/

/**
 * Get a users favorite activity stream items
 *
 * @since BuddyPress (1.2)
 *
 * @param int $user_id
 *
 * @uses bp_get_user_meta()
 * @uses apply_filters() To call the 'bp_activity_get_user_favorites' hook
 *
 * @return array Array of users favorite activity stream ID's
 */
function bp_activity_get_user_favorites( $user_id = 0 ) {

        // Fallback to logged in user if no user_id is passed
        if ( empty( $user_id ) )
                $user_id = bp_displayed_user_id();

        // Get favorites for user
        $favs = bp_get_user_meta( $user_id, 'bp_favorite_activities', true );

        return apply_filters( 'bp_activity_get_user_favorites', $favs );
}

/**
 * Add an activity stream item as a favorite for a user
 *
 * @since BuddyPress (1.2)
 *
 * @param int $activity_id
 * @param int $user_id
 *
 * @uses is_user_logged_in()
 * @uses bp_get_user_meta()
 * @uses bp_activity_get_meta()
 * @uses bp_update_user_meta()
 * @uses bp_activity_update_meta()
 * @uses do_action() To call the 'bp_activity_add_user_favorite' hook
 * @uses do_action() To call the 'bp_activity_add_user_favorite_fail' hook
 *
 * @return bool True on success, false on failure
 */
function bp_activity_add_user_favorite( $activity_id, $user_id = 0 ) {

        // Favorite activity stream items are for logged in users only
        if ( !is_user_logged_in() )
                return false;

        // Fallback to logged in user if no user_id is passed
        if ( empty( $user_id ) )
                $user_id = bp_loggedin_user_id();

        // Update the user's personal favorites
        $my_favs   = bp_get_user_meta( bp_loggedin_user_id(), 'bp_favorite_activities', true );
        $my_favs[] = $activity_id;

        // Update the total number of users who have favorited this activity
        $fav_count = bp_activity_get_meta( $activity_id, 'favorite_count' );
        $fav_count = !empty( $fav_count ) ? (int) $fav_count + 1 : 1;

        // Update user meta
        bp_update_user_meta( bp_loggedin_user_id(), 'bp_favorite_activities', $my_favs );

        // Update activity meta counts
        if ( true === bp_activity_update_meta( $activity_id, 'favorite_count', $fav_count ) ) {

            // Update the users that favorited this activity
        $favorited_users = bp_activity_get_meta( $activity_id, 'activity_favorited_users');
        $favorited_users[] = $user_id;
        bp_activity_update_meta( $activity_id, 'activity_favorited_users', $favorited_users );

                // Execute additional code
                do_action( 'bp_activity_add_user_favorite', $activity_id, $user_id );

                // Success
                return true;

        // Saving meta was unsuccessful for an unknown reason
        } else {
                // Execute additional code
                do_action( 'bp_activity_add_user_favorite_fail', $activity_id, $user_id );

                return false;
        }
}

/**
 * Remove an activity stream item as a favorite for a user
 *
 * @since BuddyPress (1.2)
 *
 * @param int $activity_id
 * @param int $user_id
 *
 * @uses is_user_logged_in()
 * @uses bp_get_user_meta()
 * @uses bp_activity_get_meta()
 * @uses bp_activity_update_meta()
 * @uses bp_update_user_meta()
 * @uses do_action() To call the 'bp_activity_remove_user_favorite' hook
 *
 * @return bool True on success, false on failure
 */
function bp_activity_remove_user_favorite( $activity_id, $user_id = 0 ) {

        // Favorite activity stream items are for logged in users only
        if ( !is_user_logged_in() )
                return false;

        // Fallback to logged in user if no user_id is passed
        if ( empty( $user_id ) )
                $user_id = bp_loggedin_user_id();

        // Remove the fav from the user's favs
        $my_favs = bp_get_user_meta( $user_id, 'bp_favorite_activities', true );
        $my_favs = array_flip( (array) $my_favs );
        unset( $my_favs[$activity_id] );
        $my_favs = array_unique( array_flip( $my_favs ) );

        // Update the total number of users who have favorited this activity
        if ( $fav_count = bp_activity_get_meta( $activity_id, 'favorite_count' ) ) {

                // Deduct from total favorites
                if ( bp_activity_update_meta( $activity_id, 'favorite_count', (int) $fav_count - 1 ) ) {

                        // Update users favorites
                        if ( bp_update_user_meta( $user_id, 'bp_favorite_activities', $my_favs ) ) {

                                // Execute additional code
                                do_action( 'bp_activity_remove_user_favorite', $activity_id, $user_id );

                                // Success
                                return true;

                        // Error updating
                        } else {
                                return false;
                        }

                // Error updating favorite count
                } else {
                        return false;
                }

        // Error getting favorite count
        } else {
                return false;
        }
}

/**
 * Check if activity exists by scanning content
 *
 * @since BuddyPress (1.1)
 *
 * @param string $content
 *
 * @uses BP_Activity_Activity::check_exists_by_content() {@link BP_Activity_Activity}
 * @uses apply_filters() To call the 'bp_activity_check_exists_by_content' hook
 *
 * @return bool
 */
function bp_activity_check_exists_by_content( $content ) {
        return apply_filters( 'bp_activity_check_exists_by_content', BP_Activity_Activity::check_exists_by_content( $content ) );
}

/**
 * Retrieve the last time activity was updated
 *
 * @since BuddyPress (1.0)
 *
 * @uses BP_Activity_Activity::get_last_updated() {@link BP_Activity_Activity}
 * @uses apply_filters() To call the 'bp_activity_get_last_updated' hook
 *
 * @return string Date last updated
 */
function bp_activity_get_last_updated() {
        return apply_filters( 'bp_activity_get_last_updated', BP_Activity_Activity::get_last_updated() );
}

/**
 * Retrieve the number of favorite activity stream items a user has
 *
 * @since BuddyPress (1.2)
 *
 * @param int $user_id
 *
 * @uses BP_Activity_Activity::total_favorite_count() {@link BP_Activity_Activity}
 *
 * @return int Total favorite count
 */
function bp_activity_total_favorites_for_user( $user_id = 0 ) {

        // Fallback on displayed user, and then logged in user
        if ( empty( $user_id ) )
                $user_id = ( bp_displayed_user_id() ) ? bp_displayed_user_id() : bp_loggedin_user_id();

        return BP_Activity_Activity::total_favorite_count( $user_id );
}

/** Meta *********************************************************************/

/**
 * Delete a meta entry from the DB for an activity stream item
 *
 * @since BuddyPress (1.2)
 *
 * @param int $activity_id
 * @param string $meta_key
 * @param string $meta_value
 *
 * @global object $wpdb
 * @global object $bp BuddyPress global settings
 * @uses wp_cache_delete()
 * @uses is_wp_error()
 *
 * @return bool True on success, false on failure
 */
function bp_activity_delete_meta( $activity_id, $meta_key = '', $meta_value = '' ) {
        global $wpdb, $bp;

        // Return false if any of the above values are not set
        if ( !is_numeric( $activity_id ) )
                return false;

        // Sanitize key
        $meta_key = preg_replace( '|[^a-z0-9_]|i', '', $meta_key );

        if ( is_array( $meta_value ) || is_object( $meta_value ) )
                $meta_value = serialize( $meta_value );

        // Trim off whitespace
        $meta_value = trim( $meta_value );

        // Delete all for activity_id
        if ( empty( $meta_key ) )
                $retval = $wpdb->query( $wpdb->prepare( "DELETE FROM {$bp->activity->table_name_meta} WHERE activity_id = %d", $activity_id ) );

        // Delete only when all match
        else if ( $meta_value )
                $retval = $wpdb->query( $wpdb->prepare( "DELETE FROM {$bp->activity->table_name_meta} WHERE activity_id = %d AND meta_key = %s AND meta_value = %s", $activity_id, $meta_key, $meta_value ) );

        // Delete only when activity_id and meta_key match
        else
                $retval = $wpdb->query( $wpdb->prepare( "DELETE FROM {$bp->activity->table_name_meta} WHERE activity_id = %d AND meta_key = %s", $activity_id, $meta_key ) );

        // Delete cache entry
        wp_cache_delete( 'bp_activity_meta_' . $activity_id . '_' . $meta_key, 'bp' );

        // Success
        if ( !is_wp_error( $retval ) )
                return true;

        // Fail
        else
                return false;
}

/**
 * Get activity meta
 *
 * @since BuddyPress (1.2)
 *
 * @param int $activity_id
 * @param string $meta_key
 *
 * @global object $wpdb
 * @global object $bp BuddyPress global settings
 * @uses wp_cache_get()
 * @uses wp_cache_set()
 * @uses apply_filters() To call the 'bp_activity_get_meta' hook
 *
 * @return bool
 */
function bp_activity_get_meta( $activity_id = 0, $meta_key = '' ) {
        global $wpdb, $bp;

        // Make sure activity_id is valid
        if ( empty( $activity_id ) || !is_numeric( $activity_id ) )
                return false;

        // We have a key to look for
        if ( !empty( $meta_key ) ) {

                // Sanitize key
                $meta_key = preg_replace( '|[^a-z0-9_]|i', '', $meta_key );

                // Check cache
                if ( !$metas = wp_cache_get( 'bp_activity_meta_' . $activity_id . '_' . $meta_key, 'bp' ) ) {
                        // No cache so hit the DB
                        $metas = $wpdb->get_col( $wpdb->prepare("SELECT meta_value FROM {$bp->activity->table_name_meta} WHERE activity_id = %d AND meta_key = %s", $activity_id, $meta_key ) );

                        // Set cache
                        wp_cache_set( 'bp_activity_meta_' . $activity_id . '_' . $meta_key, $metas, 'bp' );
                }

        // No key so get all for activity_id
        } else {
                $metas = $wpdb->get_results( $wpdb->prepare( "SELECT meta_key, meta_value FROM {$bp->activity->table_name_meta} WHERE activity_id = %d", $activity_id ) );
                                
                if ( !empty( $metas ) ) {
                        $metas = array_map( 'maybe_unserialize', (array) $metas );
                        
                        foreach( $metas as $mkey => $mvalue ) {
                                wp_cache_set( 'bp_activity_meta_' . $activity_id . '_' . $mkey, $mvalue, 'bp' );
                        }
                }
        }
        
        // No result so return false
        if ( empty( $metas ) )
                return false;

        // Maybe, just maybe... unserialize
        $metas = array_map( 'maybe_unserialize', (array) $metas );

        // Return first item in array if only 1, else return all metas found
        $retval = ( 1 == count( $metas ) ? $metas[0] : $metas );

        // Filter result before returning
        return apply_filters( 'bp_activity_get_meta', $retval, $activity_id, $meta_key );
}

/**
 * Update activity meta
 *
 * @since BuddyPress (1.2)
 *
 * @param int $activity_id
 * @param string $meta_key
 * @param string $meta_value
 *
 * @global object $wpdb
 * @global object $bp BuddyPress global settings
 * @uses maybe_serialize()
 * @uses bp_activity_delete_meta()
 * @uses wp_cache_set()
 *
 * @return bool True on success, false on failure
 */
function bp_activity_update_meta( $activity_id, $meta_key, $meta_value ) {
        global $wpdb, $bp;

        // Make sure activity_id is valid
        if ( !is_numeric( $activity_id ) )
                return false;

        // Sanitize key
        $meta_key = preg_replace( '|[^a-z0-9_]|i', '', $meta_key );

        // Sanitize value
        if ( is_string( $meta_value ) )
                $meta_value = stripslashes( $wpdb->escape( $meta_value ) );

        // Maybe, just maybe... serialize
        $meta_value = maybe_serialize( $meta_value );

        // If value is empty, delete the meta key
        if ( empty( $meta_value ) )
                return bp_activity_delete_meta( $activity_id, $meta_key );

        // See if meta key exists for activity_id
        $cur = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$bp->activity->table_name_meta} WHERE activity_id = %d AND meta_key = %s", $activity_id, $meta_key ) );

        // Meta key does not exist so INSERT
        if ( empty( $cur ) )
                $wpdb->query( $wpdb->prepare( "INSERT INTO {$bp->activity->table_name_meta} ( activity_id, meta_key, meta_value ) VALUES ( %d, %s, %s )", $activity_id, $meta_key, $meta_value ) );

        // Meta key exists, so UPDATE
        else if ( $cur->meta_value != $meta_value )
                $wpdb->query( $wpdb->prepare( "UPDATE {$bp->activity->table_name_meta} SET meta_value = %s WHERE activity_id = %d AND meta_key = %s", $meta_value, $activity_id, $meta_key ) );

        // Weirdness, so return false
        else
                return false;

        // Set cache
        wp_cache_set( 'bp_activity_meta_' . $activity_id . '_' . $meta_key, $meta_value, 'bp' );

        // Victory is ours!
        return true;
}

/** Clean up *****************************************************************/

/**
 * Completely remove a user's activity data
 *
 * @since BuddyPress (1.5)
 *
 * @param int $user_id
 *
 * @uses is_user_logged_in()
 * @uses bp_activity_delete()
 * @uses bp_delete_user_meta()
 * @uses do_action() To call the 'bp_activity_remove_data' hook
 * @uses do_action() To call the 'bp_activity_remove_all_user_data' hook
 */
function bp_activity_remove_all_user_data( $user_id = 0 ) {

        // Do not delete user data unless a logged in user says so
        if ( empty( $user_id ) || !is_user_logged_in() )
                return false;

        // Clear the user's activity from the sitewide stream and clear their activity tables
        bp_activity_delete( array( 'user_id' => $user_id ) );

        // Remove any usermeta
        bp_delete_user_meta( $user_id, 'bp_latest_update' );
        bp_delete_user_meta( $user_id, 'bp_favorite_activities' );

        // Execute additional code
        do_action( 'bp_activity_remove_data', $user_id ); // Deprecated! Do not use!

        // Use this going forward
        do_action( 'bp_activity_remove_all_user_data', $user_id );
}
add_action( 'wpmu_delete_user',  'bp_activity_remove_all_user_data' );
add_action( 'delete_user',       'bp_activity_remove_all_user_data' );

/**
 * Mark all of the user's activity as spam
 *
 * @global object $wpdb
 * @global object $bp BuddyPress global settings
 * @param int $user_id
 * @since 1.6
 */
function bp_activity_spam_all_user_data( $user_id = 0 ) {
        global $bp, $wpdb;

        // Do not delete user data unless a logged in user says so
        if ( empty( $user_id ) || ! is_user_logged_in() )
                return false;

        // Get all the user's activities.
        $activities = bp_activity_get( array( 'display_comments' => 'stream', 'filter' => array( 'user_id' => $user_id ), 'show_hidden' => true, ) );

        // Mark each as spam
        foreach ( (array) $activities['activities'] as $activity ) {

                // Create an activity object
                $activity_obj = new BP_Activity_Activity;
                foreach ( $activity as $k => $v )
                        $activity_obj->$k = $v;

                // Mark as spam
                bp_activity_mark_as_spam( $activity_obj );

                /*
                 * If Akismet is present, update the activity history meta.
                 *
                 * This is usually taken care of when BP_Activity_Activity::save() happens, but
                 * as we're going to be updating all the activity statuses directly, for efficency,
                 * we need to update manually.
                 */
                if ( ! empty( $bp->activity->akismet ) )
                        $bp->activity->akismet->update_activity_spam_meta( $activity_obj );

                // Tidy up
                unset( $activity_obj );
        }

        // Mark all of this user's activities as spam
        $wpdb->query( $wpdb->prepare( "UPDATE {$bp->activity->table_name} SET is_spam = 1 WHERE user_id = %d", $user_id ) );

        // Call an action for plugins to use
        do_action( 'bp_activity_spam_all_user_data', $user_id, $activities['activities'] );
}
add_action( 'bp_make_spam_user', 'bp_activity_spam_all_user_data' );

/**
 * Mark all of the user's activity as ham (not spam)
 *
 * @global object $wpdb
 * @global object $bp BuddyPress global settings
 * @param int $user_id
 * @since 1.6
 */
function bp_activity_ham_all_user_data( $user_id = 0 ) {
        global $bp, $wpdb;

        // Do not delete user data unless a logged in user says so
        if ( empty( $user_id ) || ! is_user_logged_in() )
                return false;

        // Get all the user's activities.
        $activities = bp_activity_get( array( 'display_comments' => 'stream', 'filter' => array( 'user_id' => $user_id ), 'show_hidden' => true, 'spam' => 'all', ) );

        // Mark each as not spam
        foreach ( (array) $activities['activities'] as $activity ) {

                // Create an activity object
                $activity_obj = new BP_Activity_Activity;
                foreach ( $activity as $k => $v )
                        $activity_obj->$k = $v;

                // Mark as not spam     
                bp_activity_mark_as_ham( $activity_obj );

                /*
                 * If Akismet is present, update the activity history meta.
                 *
                 * This is usually taken care of when BP_Activity_Activity::save() happens, but
                 * as we're going to be updating all the activity statuses directly, for efficency,
                 * we need to update manually.
                 */
                if ( ! empty( $bp->activity->akismet ) )
                        $bp->activity->akismet->update_activity_ham_meta( $activity_obj );

                // Tidy up
                unset( $activity_obj );
        }

        // Mark all of this user's activities as spam
        $wpdb->query( $wpdb->prepare( "UPDATE {$bp->activity->table_name} SET is_spam = 0 WHERE user_id = %d", $user_id ) );

        // Call an action for plugins to use
        do_action( 'bp_activity_ham_all_user_data', $user_id, $activities['activities'] );
}
add_action( 'bp_make_ham_user', 'bp_activity_ham_all_user_data' );

/**
 * Register the activity stream actions for updates
 *
 * @global object $bp BuddyPress global settings
 * @since 1.6
 */
function bp_activity_register_activity_actions() {
        global $bp;

        bp_activity_set_action( $bp->activity->id, 'activity_update', __( 'Posted a status update', 'buddypress' ) );
        bp_activity_set_action( $bp->activity->id, 'activity_comment', __( 'Replied to a status update', 'buddypress' ) );

        do_action( 'bp_activity_register_activity_actions' );

        // Backpat. Don't use this.
        do_action( 'updates_register_activity_actions' );
}
add_action( 'bp_register_activity_actions', 'bp_activity_register_activity_actions' );

/******************************************************************************
 * Business functions are where all the magic happens in BuddyPress. They will
 * handle the actual saving or manipulation of information. Usually they will
 * hand off to a database class for data access, then return
 * true or false on success or failure.
 */

/**
 * Retrieve an activity or activities
 *
 * @since BuddyPress (1.2)
 *
 * @param array $args
 *
 * @uses wp_parse_args()
 * @uses wp_cache_get()
 * @uses wp_cache_set()
 * @uses BP_Activity_Activity::get() {@link BP_Activity_Activity}
 * @uses apply_filters_ref_array() To call the 'bp_activity_get' hook
 *
 * @return object $activity The activity/activities object
 */
function bp_activity_get( $args = '' ) {
        $defaults = array(
                'max'              => false,        // Maximum number of results to return
                'page'             => 1,            // page 1 without a per_page will result in no pagination.
                'per_page'         => false,        // results per page
                'sort'             => 'DESC',       // sort ASC or DESC
                'display_comments' => false,        // false for no comments. 'stream' for within stream display, 'threaded' for below each activity item

                'search_terms'     => false,        // Pass search terms as a string
                'show_hidden'      => false,        // Show activity items that are hidden site-wide?
                'exclude'          => false,        // Comma-separated list of activity IDs to exclude
                'in'               => false,        // Comma-separated list or array of activity IDs to which you want to limit the query
                'spam'             => 'ham_only',   // 'ham_only' (default), 'spam_only' or 'all'.

                /**
                 * Pass filters as an array -- all filter items can be multiple values comma separated:
                 * array(
                 *      'user_id'      => false, // user_id to filter on
                 *      'object'       => false, // object to filter on e.g. groups, profile, status, friends
                 *      'action'       => false, // action to filter on e.g. activity_update, profile_updated
                 *      'primary_id'   => false, // object ID to filter on e.g. a group_id or forum_id or blog_id etc.
                 *      'secondary_id' => false, // secondary object ID to filter on e.g. a post_id
                 * );
                 */
                'filter' => array()
        );
        $r = wp_parse_args( $args, $defaults );
        extract( $r, EXTR_SKIP );

        // Attempt to return a cached copy of the first page of sitewide activity.
        if ( 1 == (int) $page && empty( $max ) && empty( $search_terms ) && empty( $filter ) && empty( $exclude ) && empty( $in ) && 'DESC' == $sort && empty( $exclude ) && 'ham_only' == $spam ) {
                if ( !$activity = wp_cache_get( 'bp_activity_sitewide_front', 'bp' ) ) {
                        $args = array(
                                'page'             => $page,
                                'per_page'         => $per_page,
                                'max'              => $max,
                                'sort'             => $sort,
                                'search_terms'     => $search_terms,
                                'filter'           => $filter,
                                'display_comments' => $display_comments,
                                'show_hidden'      => $show_hidden,
                                'spam'             => $spam
                        );
                        $activity = BP_Activity_Activity::get( $args );
                        wp_cache_set( 'bp_activity_sitewide_front', $activity, 'bp' );
                }

        } else {
                $args = array(
                        'page'             => $page,
                        'per_page'         => $per_page,
                        'max'              => $max,
                        'sort'             => $sort,
                        'search_terms'     => $search_terms,
                        'filter'           => $filter,
                        'display_comments' => $display_comments,
                        'show_hidden'      => $show_hidden,
                        'exclude'          => $exclude,
                        'in'               => $in,
                        'spam'             => $spam
                );
                $activity = BP_Activity_Activity::get( $args );
        }

        return apply_filters_ref_array( 'bp_activity_get', array( &$activity, &$r ) );
}

/**
 * Fetch specific activity items
 *
 * @since BuddyPress (1.2)
 *
 * @param array $args See docs for $defaults for details
 *
 * @uses wp_parse_args()
 * @uses apply_filters() To call the 'bp_activity_get_specific' hook
 * @uses BP_Activity_Activity::get() {@link BP_Activity_Activity}
 *
 * @return array The array returned by BP_Activity_Activity::get()
 */
function bp_activity_get_specific( $args = '' ) {
        $defaults = array(
                'activity_ids'     => false,       // A single activity_id or array of IDs.
                'display_comments' => false,       // true or false to display threaded comments for these specific activity items
                'max'              => false,       // Maximum number of results to return
                'page'             => 1,           // page 1 without a per_page will result in no pagination.
                'per_page'         => false,       // results per page
                'show_hidden'      => true,        // When fetching specific items, show all
                'sort'             => 'DESC',      // sort ASC or DESC
                'spam'             => 'ham_only',  // Retrieve items marked as spam
        );
        $r = wp_parse_args( $args, $defaults );
        extract( $r, EXTR_SKIP );

        $get_args = array(
                'page'             => $page,
                'per_page'         => $per_page,
                'max'              => $max,
                'sort'             => $sort,
                'display_comments' => $display_comments,
                'show_hidden'      => $show_hidden,
                'in'               => $activity_ids,
                'spam'             => $spam
        );
        return apply_filters( 'bp_activity_get_specific', BP_Activity_Activity::get( $get_args ), $args, $get_args );
}

/**
 * Add an activity item
 *
 * @since BuddyPress (1.1)
 *
 * @param array $args See docs for $defaults for details
 *
 * @uses wp_parse_args()
 * @uses BP_Activity_Activity::save() {@link BP_Activity_Activity}
 * @uses BP_Activity_Activity::rebuild_activity_comment_tree() {@link BP_Activity_Activity}
 * @uses wp_cache_delete()
 * @uses do_action() To call the 'bp_activity_add' hook
 *
 * @return int The activity id
 */
function bp_activity_add( $args = '' ) {

        $defaults = array(
                'id'                => false, // Pass an existing activity ID to update an existing entry.

                'action'            => '',    // The activity action - e.g. "Jon Doe posted an update"
                'content'           => '',    // Optional: The content of the activity item e.g. "BuddyPress is awesome guys!"

                'component'         => false, // The name/ID of the component e.g. groups, profile, mycomponent
                'type'              => false, // The activity type e.g. activity_update, profile_updated
                'primary_link'      => '',    // Optional: The primary URL for this item in RSS feeds (defaults to activity permalink)

                'user_id'           => bp_loggedin_user_id(), // Optional: The user to record the activity for, can be false if this activity is not for a user.
                'item_id'           => false, // Optional: The ID of the specific item being recorded, e.g. a blog_id
                'secondary_item_id' => false, // Optional: A second ID used to further filter e.g. a comment_id
                'recorded_time'     => bp_core_current_time(), // The GMT time that this activity was recorded
                'hide_sitewide'     => false, // Should this be hidden on the sitewide activity stream?
                'is_spam'           => false, // Is this activity item to be marked as spam?
        );
        $params = wp_parse_args( $args, $defaults );
        extract( $params, EXTR_SKIP );

        // Make sure we are backwards compatible
        if ( empty( $component ) && !empty( $component_name ) )
                $component = $component_name;

        if ( empty( $type ) && !empty( $component_action ) )
                $type = $component_action;

        // Setup activity to be added
        $activity                    = new BP_Activity_Activity( $id );
        $activity->user_id           = $user_id;
        $activity->component         = $component;
        $activity->type              = $type;
        $activity->action            = $action;
        $activity->content           = $content;
        $activity->primary_link      = $primary_link;
        $activity->item_id           = $item_id;
        $activity->secondary_item_id = $secondary_item_id;
        $activity->date_recorded     = $recorded_time;
        $activity->hide_sitewide     = $hide_sitewide;
        $activity->is_spam           = $is_spam;

        if ( !$activity->save() )
                return false;

        // If this is an activity comment, rebuild the tree
        if ( 'activity_comment' == $activity->type )
                BP_Activity_Activity::rebuild_activity_comment_tree( $activity->item_id );

        wp_cache_delete( 'bp_activity_sitewide_front', 'bp' );
        do_action( 'bp_activity_add', $params );

        return $activity->id;
}

/**
 * Post an activity update
 *
 * @since BuddyPress (1.2)
 *
 * @param array $args See docs for $defaults for details
 *
 * @global object $bp BuddyPress global settings
 * @uses wp_parse_args()
 * @uses bp_is_user_inactive()
 * @uses bp_core_get_userlink()
 * @uses bp_activity_add()
 * @uses apply_filters() To call the 'bp_activity_new_update_action' hook
 * @uses apply_filters() To call the 'bp_activity_new_update_content' hook
 * @uses apply_filters() To call the 'bp_activity_new_update_primary_link' hook
 * @uses bp_update_user_meta()
 * @uses wp_filter_kses()
 * @uses do_action() To call the 'bp_activity_posted_update' hook
 *
 * @return int $activity_id The activity id
 */
function bp_activity_post_update( $args = '' ) {
        global $bp;

        $defaults = array(
                'content' => false,
                'user_id' => bp_loggedin_user_id()
        );
        $r = wp_parse_args( $args, $defaults );
        extract( $r, EXTR_SKIP );

        if ( empty( $content ) || !strlen( trim( $content ) ) )
                return false;

        if ( bp_is_user_inactive( $user_id ) )
                return false;

        // Record this on the user's profile
        $from_user_link   = bp_core_get_userlink( $user_id );
        $activity_action  = sprintf( __( '%s posted an update', 'buddypress' ), $from_user_link );
        $activity_content = $content;
        $primary_link     = bp_core_get_userlink( $user_id, false, true );

        // Now write the values
        $activity_id = bp_activity_add( array(
                'user_id'      => $user_id,
                'action'       => apply_filters( 'bp_activity_new_update_action', $activity_action ),
                'content'      => apply_filters( 'bp_activity_new_update_content', $activity_content ),
                'primary_link' => apply_filters( 'bp_activity_new_update_primary_link', $primary_link ),
                'component'    => $bp->activity->id,
                'type'         => 'activity_update'
        ) );

        $activity_content = apply_filters( 'bp_activity_latest_update_content', $content ); 

        // Add this update to the "latest update" usermeta so it can be fetched anywhere.
        bp_update_user_meta( bp_loggedin_user_id(), 'bp_latest_update', array( 'id' => $activity_id, 'content' => $content ) );

        do_action( 'bp_activity_posted_update', $content, $user_id, $activity_id );

        return $activity_id;
}

/**
 * Add an activity comment
 *
 * @since BuddyPress (1.2)
 *
 * @param array $args See docs for $defaults for details
 *
 * @global object $bp BuddyPress global settings
 * @uses wp_parse_args()
 * @uses bp_activity_add()
 * @uses apply_filters() To call the 'bp_activity_comment_action' hook
 * @uses apply_filters() To call the 'bp_activity_comment_content' hook
 * @uses bp_activity_new_comment_notification()
 * @uses wp_cache_delete()
 * @uses do_action() To call the 'bp_activity_comment_posted' hook
 *
 * @return int $comment_id The comment id
 */
function bp_activity_new_comment( $args = '' ) {
        global $bp;

        $defaults = array(
                'id'          => false,
                'content'     => false,
                'user_id'     => bp_loggedin_user_id(),
                'activity_id' => false, // ID of the root activity item
                'parent_id'   => false  // ID of a parent comment (optional)
        );

        $params = wp_parse_args( $args, $defaults );
        extract( $params, EXTR_SKIP );

        if ( empty( $content ) || empty( $user_id ) || empty( $activity_id ) )
                return false;

        if ( empty( $parent_id ) )
                $parent_id = $activity_id;

        // Check to see if the parent activity is hidden, and if so, hide this comment publically.
        $activity = new BP_Activity_Activity( $activity_id );
        $is_hidden = ( (int) $activity->hide_sitewide ) ? 1 : 0;

        // Insert the activity comment
        $comment_id = bp_activity_add( array(
                'id'                => $id,
                'action'            => apply_filters( 'bp_activity_comment_action', sprintf( __( '%s posted a new activity comment', 'buddypress' ), bp_core_get_userlink( $user_id ) ) ),
                'content'           => apply_filters( 'bp_activity_comment_content', $content ),
                'component'         => $bp->activity->id,
                'type'              => 'activity_comment',
                'user_id'           => $user_id,
                'item_id'           => $activity_id,
                'secondary_item_id' => $parent_id,
                'hide_sitewide'     => $is_hidden
        ) );

        // Send an email notification if settings allow
        bp_activity_new_comment_notification( $comment_id, $user_id, $params );

        // Clear the comment cache for this activity
        wp_cache_delete( 'bp_activity_comments_' . $parent_id );

        do_action( 'bp_activity_comment_posted', $comment_id, $params );

        return $comment_id;
}

/**
 * Fetch the activity_id for an existing activity entry in the DB.
 *
 * @since BuddyPress (1.2)
 *
 * @param array $args See docs for $defaults for details
 *
 * @uses wp_parse_args()
 * @uses apply_filters() To call the 'bp_activity_get_activity_id' hook
 * @uses BP_Activity_Activity::save() {@link BP_Activity_Activity}
 *
 * @return int $activity_id The activity id
 */
function bp_activity_get_activity_id( $args = '' ) {
        $defaults = array(
                'user_id'           => false,
                'component'         => false,
                'type'              => false,
                'item_id'           => false,
                'secondary_item_id' => false,
                'action'            => false,
                'content'           => false,
                'date_recorded'     => false,
        );

        $r = wp_parse_args( $args, $defaults );
        extract( $r, EXTR_SKIP );

        return apply_filters( 'bp_activity_get_activity_id', BP_Activity_Activity::get_id( $user_id, $component, $type, $item_id, $secondary_item_id, $action, $content, $date_recorded ) );
}

/**
 * Deleting Activity
 *
 * If you're looking to hook into one action that provides the ID(s) of
 * the activity/activities deleted, then use:
 *
 * add_action( 'bp_activity_deleted_activities', 'my_function' );
 *
 * The action passes one parameter that is a single activity ID or an
 * array of activity IDs depending on the number deleted.
 *
 * If you are deleting an activity comment please use bp_activity_delete_comment();
 *
 * @since BuddyPress (1.0)
 *
 * @param array $args See docs for $defaults for details
 *
 * @uses wp_parse_args()
 * @uses bp_activity_adjust_mention_count()
 * @uses BP_Activity_Activity::delete() {@link BP_Activity_Activity}
 * @uses do_action() To call the 'bp_before_activity_delete' hook
 * @uses bp_get_user_meta()
 * @uses bp_delete_user_meta()
 * @uses do_action() To call the 'bp_activity_delete' hook
 * @uses do_action() To call the 'bp_activity_deleted_activities' hook
 * @uses wp_cache_delete()
 *
 * @return bool True on success, false on failure
 */
function bp_activity_delete( $args = '' ) {

        // Pass one or more the of following variables to delete by those variables
        $defaults = array(
                'id'                => false,
                'action'            => false,
                'content'           => false,
                'component'         => false,
                'type'              => false,
                'primary_link'      => false,
                'user_id'           => false,
                'item_id'           => false,
                'secondary_item_id' => false,
                'date_recorded'     => false,
                'hide_sitewide'     => false
        );

        $args = wp_parse_args( $args, $defaults );

        // Adjust the new mention count of any mentioned member
        bp_activity_adjust_mention_count( $args['id'], 'delete' );

        if ( !$activity_ids_deleted = BP_Activity_Activity::delete( $args ) )
                return false;

        // Check if the user's latest update has been deleted
        if ( empty( $args['user_id'] ) )
                $user_id = bp_loggedin_user_id();
        else
                $user_id = $args['user_id'];

        do_action( 'bp_before_activity_delete', $args );

        $latest_update = bp_get_user_meta( $user_id, 'bp_latest_update', true );
        if ( !empty( $latest_update ) ) {
                if ( in_array( (int) $latest_update['id'], (array) $activity_ids_deleted ) ) {
                        bp_delete_user_meta( $user_id, 'bp_latest_update' );
                }
        }

        do_action( 'bp_activity_delete', $args );
        do_action( 'bp_activity_deleted_activities', $activity_ids_deleted );

        wp_cache_delete( 'bp_activity_sitewide_front', 'bp' );

        return true;
}

        /**
         * Delete an activity item by activity id
         *
         * You should use bp_activity_delete() instead
         *
         * @since BuddyPress (1.1)
         * @deprecated BuddyPress (1.2)
         *
         * @param array $args See docs for $defaults for details
         *
         * @uses wp_parse_args()
         * @uses bp_activity_delete()
         *
         * @return bool True on success, false on failure
         */
        function bp_activity_delete_by_item_id( $args = '' ) {

                $defaults = array(
                        'item_id'           => false,
                        'component'         => false,
                        'type'              => false,
                        'user_id'           => false,
                        'secondary_item_id' => false
                );
                $r = wp_parse_args( $args, $defaults );
                extract( $r, EXTR_SKIP );

                return bp_activity_delete( array( 'item_id' => $item_id, 'component' => $component, 'type' => $type, 'user_id' => $user_id, 'secondary_item_id' => $secondary_item_id ) );
        }

        /**
         * Delete an activity item by activity id
         *
         * You should use bp_activity_delete() instead
         *
         * @since BuddyPress (1.1)
         * @deprecated BuddyPress (1.2)
         *
         * @param int $activity_id The activity id
         *
         * @uses bp_activity_delete()
         *
         * @return bool True on success, false on failure
         */
        function bp_activity_delete_by_activity_id( $activity_id ) {
                return bp_activity_delete( array( 'id' => $activity_id ) );
        }

        /**
         * Delete an activity item by it's content
         *
         * You should use bp_activity_delete() instead
         *
         * @since BuddyPress (1.1)
         * @deprecated BuddyPress (1.2)
         *
         * @param int $user_id The user id
         * @param string $content The activity id
         * @param string $component The activity component
         * @param string $type The activity type
         *
         * @uses bp_activity_delete()
         *
         * @return bool True on success, false on failure
         */
        function bp_activity_delete_by_content( $user_id, $content, $component, $type ) {
                return bp_activity_delete( array( 'user_id' => $user_id, 'content' => $content, 'component' => $component, 'type' => $type ) );
        }

        /**
         * Delete a user's activity for a component
         *
         * You should use bp_activity_delete() instead
         *
         * @since BuddyPress (1.1)
         * @deprecated BuddyPress (1.2)
         *
         * @param int $user_id The user id
         * @param string $component The activity component
         *
         * @uses bp_activity_delete()
         *
         * @return bool True on success, false on failure
         */
        function bp_activity_delete_for_user_by_component( $user_id, $component ) {
                return bp_activity_delete( array( 'user_id' => $user_id, 'component' => $component ) );
        }

/**
 * Delete an activity comment
 *
 * @since BuddyPress (1.2)
 *
 * @param int $activity_id The activity id
 * @param int $comment_id The activity comment id
 *
 * @uses apply_filters() To call the 'bp_activity_delete_comment_pre' hook
 * @uses bp_activity_delete_children()
 * @uses bp_activity_delete()
 * @uses BP_Activity_Activity::rebuild_activity_comment_tree() {@link BP_Activity_Activity}
 * @uses do_action() To call the 'bp_activity_delete_comment' hook
 *
 * @return bool True on success, false on failure
 */
function bp_activity_delete_comment( $activity_id, $comment_id ) {
        /***
         * You may want to hook into this filter if you want to override this function and
         * handle the deletion of child comments differently. Make sure you return false.
         */
        if ( !apply_filters( 'bp_activity_delete_comment_pre', true, $activity_id, $comment_id ) )
                return false;

        // Delete any children of this comment.
        bp_activity_delete_children( $activity_id, $comment_id );

        // Delete the actual comment
        if ( !bp_activity_delete( array( 'id' => $comment_id, 'type' => 'activity_comment' ) ) )
                return false;

        // Recalculate the comment tree
        BP_Activity_Activity::rebuild_activity_comment_tree( $activity_id );

        do_action( 'bp_activity_delete_comment', $activity_id, $comment_id );

        return true;
}

        /**
         * Delete an activity comment's children
         *
         * @since BuddyPress (1.2)
         *
         * @param int $activity_id The activity id
         * @param int $comment_id The activity comment id
         *
         * @uses BP_Activity_Activity::get_child_comments() {@link BP_Activity_Activity}
         * @uses bp_activity_delete_children()
         * @uses bp_activity_delete()
         */
        function bp_activity_delete_children( $activity_id, $comment_id) {
                // Recursively delete all children of this comment.
                if ( $children = BP_Activity_Activity::get_child_comments( $comment_id ) ) {
                        foreach( (array) $children as $child ) {
                                bp_activity_delete_children( $activity_id, $child->id );
                        }
                }
                bp_activity_delete( array( 'secondary_item_id' => $comment_id, 'type' => 'activity_comment', 'item_id' => $activity_id ) );
        }

/**
 * Get the permalink for a single activity item
 *
 * When only the $activity_id param is passed, BP has to instantiate a new BP_Activity_Activity
 * object. To save yourself some processing overhead, be sure to pass the full $activity_obj param
 * as well, if you already have it available.
 *
 * @since BuddyPress (1.2)
 *
 * @param int $activity_id The unique id of the activity object
 * @param object $activity_obj (optional) The activity object
 *
 * @uses bp_get_root_domain()
 * @uses bp_get_activity_root_slug()
 * @uses apply_filters_ref_array() To call the 'bp_activity_get_permalink' hook
 *
 * @return string $link Permalink for the activity item
 */
function bp_activity_get_permalink( $activity_id, $activity_obj = false ) {

        if ( empty( $activity_obj ) )
                $activity_obj = new BP_Activity_Activity( $activity_id );

        if ( isset( $activity_obj->current_comment ) ) {
                $activity_obj = $activity_obj->current_comment;
        }

        if ( 'new_blog_post' == $activity_obj->type || 'new_blog_comment' == $activity_obj->type || 'new_forum_topic' == $activity_obj->type || 'new_forum_post' == $activity_obj->type ) {
                $link = $activity_obj->primary_link;
        } else {
                if ( 'activity_comment' == $activity_obj->type ) {
                        $link = bp_get_root_domain() . '/' . bp_get_activity_root_slug() . '/p/' . $activity_obj->item_id . '/';
                } else {
                        $link = bp_get_root_domain() . '/' . bp_get_activity_root_slug() . '/p/' . $activity_obj->id . '/';
                }
        }

        return apply_filters_ref_array( 'bp_activity_get_permalink', array( $link, &$activity_obj ) );
}

/**
 * Hide a user's activity
 *
 * @since BuddyPress (1.2)
 *
 * @param int $user_id The user id
 *
 * @uses BP_Activity_Activity::hide_all_for_user() {@link BP_Activity_Activity}
 *
 * @return bool True on success, false on failure
 */
function bp_activity_hide_user_activity( $user_id ) {
        return BP_Activity_Activity::hide_all_for_user( $user_id );
}

/**
 * Take content, remove all images and replace them with one thumbnail image.
 *
 * @since BuddyPress (1.2)
 *
 * @param string $content The content to work with
 * @param string $link Optional. The URL that the image should link to
 *
 * @uses esc_attr()
 * @uses apply_filters() To call the 'bp_activity_thumbnail_content_images' hook
 *
 * @return string $content The content with images stripped and replaced with a single thumb.
 */
function bp_activity_thumbnail_content_images( $content, $link = false ) {

        preg_match_all( '/<img[^>]*>/Ui', $content, $matches );
        $content = preg_replace('|(\[caption(.*?)\])?<img[^>]*>(\[/caption\])?|', '', $content );
        
        if ( !empty( $matches ) && !empty( $matches[0] ) ) {
                // Get the SRC value
                preg_match( '/<img.*?(src\=[\'|"]{0,1}.*?[\'|"]{0,1})[\s|>]{1}/i', $matches[0][0], $src );

                // Get the width and height
                preg_match( '/<img.*?(height\=[\'|"]{0,1}.*?[\'|"]{0,1})[\s|>]{1}/i', $matches[0][0], $height );
                preg_match( '/<img.*?(width\=[\'|"]{0,1}.*?[\'|"]{0,1})[\s|>]{1}/i',  $matches[0][0], $width  );

                if ( !empty( $src ) ) {
                        $src    = substr( substr( str_replace( 'src=', '', $src[1] ), 0, -1 ), 1 );
                        $height = substr( substr( str_replace( 'height=', '', $height[1] ), 0, -1 ), 1 );
                        $width  = substr( substr( str_replace( 'width=', '', $width[1] ), 0, -1 ), 1 );

                        if ( empty( $width ) || empty( $height ) ) {
                                $width  = 100;
                                $height = 100;
                        }

                        $ratio      = (int) $width / (int) $height;
                        $new_height = (int) $height >= 100 ? 100 : $height;
                        $new_width  = $new_height * $ratio;

                        $image = '<img src="' . esc_attr( $src ) . '" width="' . $new_width . '" height="' . $new_height . '" alt="' . __( 'Thumbnail', 'buddypress' ) . '" class="align-left thumbnail" />';

                        if ( !empty( $link ) ) {
                                $image = '<a href="' . $link . '">' . $image . '</a>';
                        }

                        $content = $image . $content;
                }
        }

        return apply_filters( 'bp_activity_thumbnail_content_images', $content, $matches );
}

/**
 * Convenience function to control whether the current user is allowed to mark activity items as spam
 *
 * @return bool True if user is allowed to mark activity items as spam
 * @since 1.6
 * @static
 */
function bp_activity_user_can_mark_spam() {
        return apply_filters( 'bp_activity_user_can_mark_spam', bp_current_user_can( 'bp_moderate' ) );
}

/**
 * Mark activity item as spam
 *
 * @global object $bp BuddyPress global settings
 * @param BP_Activity_Activity $activity
 * @param string $source Optional; default is "by_a_person" (e.g. a person has manually marked the activity as spam).
 * @since 1.6
 */
function bp_activity_mark_as_spam( &$activity, $source = 'by_a_person' ) {
        global $bp;

        $activity->is_spam = 1;

        // Clear the activity stream first page cache
        wp_cache_delete( 'bp_activity_sitewide_front', 'bp' );

        // Clear the activity comment cache for this activity item
        wp_cache_delete( 'bp_activity_comments_' . $activity->id, 'bp' );

        // If Akismet is active, and this was a manual spam/ham request, stop Akismet checking the activity
        if ( 'by_a_person' == $source && !empty( $bp->activity->akismet ) ) {
                remove_action( 'bp_activity_before_save', array( $bp->activity->akismet, 'check_activity' ), 4, 1 );

                // Build data package for Akismet
                $activity_data = BP_Akismet::build_akismet_data_package( $activity );

                // Tell Akismet this is spam
                $activity_data = $bp->activity->akismet->send_akismet_request( $activity_data, 'submit', 'spam' );

                // Update meta
                add_action( 'bp_activity_after_save', array( $bp->activity->akismet, 'update_activity_spam_meta' ), 1, 1 );
        }

        do_action( 'bp_activity_mark_as_spam', $activity, $source );
}

/**
 * Mark activity item as ham
 *
 * @global object $bp BuddyPress global settings
 * @param BP_Activity_Activity $activity
 * @param string $source Optional; default is "by_a_person" (e.g. a person has manually marked the activity as spam).
 * @since 1.6
 */
function bp_activity_mark_as_ham( &$activity, $source = 'by_a_person' ) {
        global $bp;

        $activity->is_spam = 0;

        // Clear the activity stream first page cache
        wp_cache_delete( 'bp_activity_sitewide_front', 'bp' );

        // Clear the activity comment cache for this activity item
        wp_cache_delete( 'bp_activity_comments_' . $activity->id, 'bp' );

        // If Akismet is active, and this was a manual spam/ham request, stop Akismet checking the activity
        if ( 'by_a_person' == $source && !empty( $bp->activity->akismet ) ) {
                remove_action( 'bp_activity_before_save', array( $bp->activity->akismet, 'check_activity' ), 4, 1 );

                // Build data package for Akismet
                $activity_data = BP_Akismet::build_akismet_data_package( $activity );

                // Tell Akismet this is spam
                $activity_data = $bp->activity->akismet->send_akismet_request( $activity_data, 'submit', 'ham' );

                // Update meta
                add_action( 'bp_activity_after_save', array( $bp->activity->akismet, 'update_activity_ham_meta' ), 1, 1 );
        }

        do_action( 'bp_activity_mark_as_ham', $activity, $source );
} 


/** Embeds *******************************************************************/

/**
 * Grabs the activity update ID and attempts to retrieve the oEmbed cache (if it exists)
 * during the activity loop.  If no cache and link is embeddable, cache it.
 *
 * This does not cover recursive activity comments, as they do not use a real loop.
 * For that, see {@link bp_activity_comment_embed()}.
 *
 * @since BuddyPress (1.5)
 *
 * @see BP_Embed
 * @see bp_embed_activity_cache()
 * @see bp_embed_activity_save_cache()
 *
 * @uses add_filter() To attach 'bp_get_activity_id' to 'embed_post_id'
 * @uses add_filter() To attach 'bp_embed_activity_cache' to 'bp_embed_get_cache'
 * @uses add_action() To attach 'bp_embed_activity_save_cache' to 'bp_embed_update_cache'
 */
function bp_activity_embed() {
        add_filter( 'embed_post_id',         'bp_get_activity_id'                  );
        add_filter( 'bp_embed_get_cache',    'bp_embed_activity_cache',      10, 3 );
        add_action( 'bp_embed_update_cache', 'bp_embed_activity_save_cache', 10, 3 );
}
add_action( 'activity_loop_start', 'bp_activity_embed' );

/**
 * Grabs the activity comment ID and attempts to retrieve the oEmbed cache (if it exists)
 * when BP is recursing through activity comments {@link bp_activity_recurse_comments()}.
 * If no cache and link is embeddable, cache it.
 *
 * @since BuddyPress (1.5)
 *
 * @see BP_Embed
 * @see bp_embed_activity_cache()
 * @see bp_embed_activity_save_cache()
 *
 * @uses add_filter() To attach 'bp_get_activity_comment_id' to 'embed_post_id'
 * @uses add_filter() To attach 'bp_embed_activity_cache' to 'bp_embed_get_cache'
 * @uses add_action() To attach 'bp_embed_activity_save_cache' to 'bp_embed_update_cache'
 */
function bp_activity_comment_embed() {
        add_filter( 'embed_post_id',         'bp_get_activity_comment_id'          );
        add_filter( 'bp_embed_get_cache',    'bp_embed_activity_cache',      10, 3 );
        add_action( 'bp_embed_update_cache', 'bp_embed_activity_save_cache', 10, 3 );
}
add_action( 'bp_before_activity_comment', 'bp_activity_comment_embed' );

/**
 * When a user clicks on a "Read More" item, make sure embeds are correctly parsed and shown for the expanded content.
 *
 * @since BuddyPress (1.5)
 *
 * @see BP_Embed
 *
 * @param object $activity The activity that is being expanded
 *
 * @global object $bp BuddyPress global settings
 * @uses add_filter() To attach create_function() to 'embed_post_id'
 * @uses add_filter() To attach 'bp_embed_activity_cache' to 'bp_embed_get_cache'
 * @uses add_action() To attach 'bp_embed_activity_save_cache' to 'bp_embed_update_cache'
 */
function bp_dtheme_embed_read_more( $activity ) {
        global $bp;

        $bp->activity->read_more_id = $activity->id;

        add_filter( 'embed_post_id',            create_function( '', 'global $bp; return $bp->activity->read_more_id;' ) );
        add_filter( 'bp_embed_get_cache',       'bp_embed_activity_cache',      10, 3 );
        add_action( 'bp_embed_update_cache',    'bp_embed_activity_save_cache', 10, 3 );
}
add_action( 'bp_dtheme_get_single_activity_content', 'bp_dtheme_embed_read_more' );

/**
 * Removes the 'embed_post_id' filter after {@link bp_activity_recurse_comments()}
 * is rendered to avoid conflict with the 'embed_post_id' filter in
 * {@link bp_activity_embed()} or any other component embeds.
 *
 * @since BuddyPress (1.5)
 *
 * @see bp_activity_comment_embed()
 *
 * @uses remove_filter() To remove 'bp_get_activity_comment_id' from 'embed_post_id'
 */
function bp_activity_comment_embed_after_recurse() {
        remove_filter( 'embed_post_id', 'bp_get_activity_comment_id' );
}
add_action( 'bp_after_activity_comment', 'bp_activity_comment_embed_after_recurse' );

/**
 * Wrapper function for {@link bp_activity_get_meta()}.
 * Used during {@link BP_Embed::parse_oembed()} via {@link bp_activity_embed()}.
 *
 * @since BuddyPress (1.5)
 *
 * @uses bp_activity_get_meta()
 *
 * @return mixed The activity meta
 */
function bp_embed_activity_cache( $cache, $id, $cachekey ) {
        return bp_activity_get_meta( $id, $cachekey );
}

/**
 * Wrapper function for {@link bp_activity_update_meta()}.
 * Used during {@link BP_Embed::parse_oembed()} via {@link bp_activity_embed()}.
 *
 * @since BuddyPress (1.5)
 *
 * @uses bp_activity_update_meta()
 */
function bp_embed_activity_save_cache( $cache, $cachekey, $id ) {
        bp_activity_update_meta( $id, $cachekey, $cache );
}

?>