public function get_collection_params() {
		$params                       = parent::get_collection_params();
		$params['context']['default'] = 'view';

		$params['type'] = array(
			'description'       => __( 'Shorthand for certain orderby/order combinations.', 'buddypress' ),
			'default'           => 'active',
			'type'              => 'string',
			'enum'              => array( 'active', 'newest', 'alphabetical', 'random', 'popular' ),
			'sanitize_callback' => 'sanitize_text_field',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['order'] = array(
			'description'       => __( 'Order sort attribute ascending or descending.', 'buddypress' ),
			'default'           => 'desc',
			'type'              => 'string',
			'enum'              => array( 'asc', 'desc' ),
			'sanitize_callback' => 'sanitize_key',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['orderby'] = array(
			'description'       => __( 'Order Groups by which attribute.', 'buddypress' ),
			'default'           => 'date_created',
			'type'              => 'string',
			'enum'              => array( 'date_created', 'last_activity', 'total_member_count', 'name', 'random' ),
			'sanitize_callback' => 'sanitize_key',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['status'] = array(
			'description'       => __( 'Group statuses to limit results to.', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array(
				'enum' => buddypress()->groups->valid_status,
				'type' => 'string',
			),
			'sanitize_callback' => 'bp_rest_sanitize_string_list',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['user_id'] = array(
			'description'       => __( 'Pass a user_id to limit to only Groups that this user is a member of.', 'buddypress' ),
			'default'           => 0,
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['parent_id'] = array(
			'description'       => __( 'Get Groups that are children of the specified Group(s) IDs.', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array( 'type' => 'integer' ),
			'sanitize_callback' => 'wp_parse_id_list',
			'validate_callback' => 'rest_validate_request_arg',
		);

		// @todo Confirm what's the proper sanitization here.
		$params['meta'] = array(
			'description'       => __( 'Get Groups based on their meta data information.', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array( 'type' => 'string' ),
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['include'] = array(
			'description'       => __( 'Ensure result set includes Groups with specific IDs.', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array( 'type' => 'integer' ),
			'sanitize_callback' => 'wp_parse_id_list',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['exclude'] = array(
			'description'       => __( 'Ensure result set excludes Groups with specific IDs', 'buddypress' ),
			'default'           => array(),
			'type'              => 'array',
			'items'             => array( 'type' => 'integer' ),
			'sanitize_callback' => 'wp_parse_id_list',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['group_type'] = array(
			'description'       => __( 'Limit results set to a certain Group type.', 'buddypress' ),
			'default'           => '',
			'type'              => 'string',
			'enum'              => bp_groups_get_group_types(),
			'sanitize_callback' => 'bp_rest_sanitize_group_types',
			'validate_callback' => 'bp_rest_validate_group_types',
		);

		$params['enable_forum'] = array(
			'description'       => __( 'Whether the Group has a forum enabled or not.', 'buddypress' ),
			'default'           => false,
			'type'              => 'boolean',
			'sanitize_callback' => 'rest_sanitize_boolean',
			'validate_callback' => 'rest_validate_request_arg',
		);

		$params['show_hidden'] = array(
			'description'       => __( 'Whether results should include hidden Groups.', 'buddypress' ),
			'default'           => false,
			'type'              => 'boolean',
			'sanitize_callback' => 'rest_sanitize_boolean',
			'validate_callback' => 'rest_validate_request_arg',
		);

		/**
		 * Filters the collection query params.
		 *
		 * @param array $params Query params.
		 */
		return apply_filters( 'bp_rest_groups_collection_params', $params );
	}