bp_insert_activity_meta( string $content = '' )

function bp_insert_activity_meta( $content = '' ) {
	global $activities_template;

	// Strip any legacy time since placeholders from BP 1.0-1.1.
	$new_content = str_replace( '<span class="time-since">%s</span>', '', $content );

	// Get the time since this activity was recorded.
	$date_recorded  = bp_core_time_since( $activities_template->activity->date_recorded );

	// Set up 'time-since' <span>.
	$time_since = sprintf(
		'<span class="time-since" data-livestamp="%1$s">%2$s</span>',
		bp_core_get_iso8601_date( $activities_template->activity->date_recorded ),
		$date_recorded
	);

	/**
	 * Filters the activity item time since markup.
	 *
	 * @since BuddyPress 1.2.0
	 *
	 * @param array $value Array containing the time since markup and the current activity component.
	 */
	$time_since = apply_filters_ref_array( 'bp_activity_time_since', array(
		$time_since,
		&$activities_template->activity
	) );

	// Insert the permalink.
	if ( ! bp_is_single_activity() ) {

		// Setup variables for activity meta.
		$activity_permalink = bp_activity_get_permalink( $activities_template->activity->id, $activities_template->activity );
		$activity_meta      = sprintf( '%1$s <a href="%2$s" class="view activity-time-since">%3$s</a>',
			$new_content,
			$activity_permalink,
			$time_since
		);

		/**
		 * Filters the activity permalink to be added to the activity content.
		 *
		 * @since BuddyPress 1.2.0
		 *
		 * @param array $value Array containing the html markup for the activity permalink, after being parsed by
		 *                     sprintf and current activity component.
		 */
		$new_content = apply_filters_ref_array( 'bp_activity_permalink', array(
			$activity_meta,
			&$activities_template->activity
		) );
	} else {
		$new_content .= str_pad( $time_since, strlen( $time_since ) + 2, ' ', STR_PAD_BOTH );
	}

	/**
	 * Filters the activity content after activity metadata has been attached.
	 *
	 * @since BuddyPress 1.2.0
	 *
	 * @param string $content Activity content with the activity metadata added.
	 */
	return apply_filters( 'bp_insert_activity_meta', $new_content, $content );
}