BP_Groups_List_Table::prepare_items()

	public function prepare_items() {
		global $groups_template;

		$screen = get_current_screen();

		// Option defaults.
		$include_id   = false;
		$search_terms = false;

		// Set current page.
		$page = $this->get_pagenum();

		// Set per page from the screen options.
		$per_page = $this->get_items_per_page( str_replace( '-', '_', "{$screen->id}_per_page" ) );

		// Sort order.
		$order = 'DESC';
		if ( !empty( $_REQUEST['order'] ) ) {
			$order = ( 'desc' == strtolower( $_REQUEST['order'] ) ) ? 'DESC' : 'ASC';
		}

		// Order by - default to newest.
		$orderby = 'last_activity';
		if ( ! empty( $_REQUEST['orderby'] ) ) {
			switch ( $_REQUEST['orderby'] ) {
				case 'name' :
					$orderby = 'name';
					break;
				case 'id' :
					$orderby = 'date_created';
					break;
				case 'members' :
					$orderby = 'total_member_count';
					break;
				case 'last_active' :
					$orderby = 'last_activity';
					break;
			}
		}

		// Are we doing a search?
		if ( !empty( $_REQUEST['s'] ) )
			$search_terms = $_REQUEST['s'];

		// Check if user has clicked on a specific group (if so, fetch only that group).
		if ( !empty( $_REQUEST['gid'] ) )
			$include_id = (int) $_REQUEST['gid'];

		// Set the current view.
		if ( isset( $_GET['group_status'] ) && in_array( $_GET['group_status'], array( 'public', 'private', 'hidden' ) ) ) {
			$this->view = $_GET['group_status'];
		}

		// We'll use the ids of group status types for the 'include' param.
		$this->group_type_ids = BP_Groups_Group::get_group_type_ids();

		// Pass a dummy array if there are no groups of this type.
		$include = false;
		if ( 'all' != $this->view && isset( $this->group_type_ids[ $this->view ] ) ) {
			$include = ! empty( $this->group_type_ids[ $this->view ] ) ? $this->group_type_ids[ $this->view ] : array( 0 );
		}

		// Get group type counts for display in the filter tabs.
		$this->group_counts = array();
		foreach ( $this->group_type_ids as $group_type => $group_ids ) {
			$this->group_counts[ $group_type ] = count( $group_ids );
		}

		// Group types
		$group_type = false;
		if ( isset( $_GET['bp-group-type'] ) && null !== bp_groups_get_group_type_object( $_GET['bp-group-type'] ) ) {
			$group_type = $_GET['bp-group-type'];
		}

		// If we're viewing a specific group, flatten all activities into a single array.
		if ( $include_id ) {
			$groups = array( (array) groups_get_group( $include_id ) );
		} else {
			$groups_args = array(
				'include'  => $include,
				'per_page' => $per_page,
				'page'     => $page,
				'orderby'  => $orderby,
				'order'    => $order
			);

			if ( $group_type ) {
				$groups_args['group_type'] = $group_type;
			}

			$groups = array();
			if ( bp_has_groups( $groups_args ) ) {
				while ( bp_groups() ) {
					bp_the_group();
					$groups[] = (array) $groups_template->group;
				}
			}
		}

		// Set raw data to display.
		$this->items = $groups;

		// Store information needed for handling table pagination.
		$this->set_pagination_args( array(
			'per_page'    => $per_page,
			'total_items' => $groups_template->total_group_count,
			'total_pages' => ceil( $groups_template->total_group_count / $per_page )
		) );
	}