public function create_item( $request ) {
		$request->set_param( 'context', 'edit' );

		if ( empty( $request['content'] ) ) {
			return new WP_Error(
				'bp_rest_create_activity_empty_content',
				__( 'Please, enter some content.', 'buddypress' ),
				array(
					'status' => 500,
				)
			);
		}

		$prepared_activity = $this->prepare_item_for_database( $request );

		// Fallback for the activity_update type.
		$type = 'activity_update';
		if ( ! empty( $request['type'] ) ) {
			$type = $request['type'];
		}

		$prime       = $request['primary_item_id'];
		$activity_id = 0;

		// Post a regular activity update.
		if ( 'activity_update' === $type ) {
			if ( bp_is_active( 'groups' ) && ! is_null( $prime ) ) {
				$activity_id = groups_post_update( $prepared_activity );
			} else {
				$activity_id = bp_activity_post_update( $prepared_activity );
			}

			// Post an activity comment.
		} elseif ( 'activity_comment' === $type ) {

			// ID of the root activity item.
			if ( isset( $prime ) ) {
				$prepared_activity->activity_id = (int) $prime;
			}

			// ID of a parent comment.
			if ( isset( $request['secondary_item_id'] ) ) {
				$prepared_activity->parent_id = (int) $request['secondary_item_id'];
			}

			$activity_id = bp_activity_new_comment( $prepared_activity );

			// Otherwise add an activity.
		} else {
			$activity_id = bp_activity_add( $prepared_activity );
		}

		if ( ! is_numeric( $activity_id ) ) {
			return new WP_Error(
				'bp_rest_user_cannot_create_activity',
				__( 'Cannot create new activity.', 'buddypress' ),
				array(
					'status' => 500,
				)
			);
		}

		$activity = bp_activity_get(
			array(
				'in'               => $activity_id,
				'display_comments' => 'stream',
				'show_hidden'      => $request['hidden'],
			)
		);

		$activity      = current( $activity['activities'] );
		$fields_update = $this->update_additional_fields_for_object( $activity, $request );

		if ( is_wp_error( $fields_update ) ) {
			return $fields_update;
		}

		$retval = array(
			$this->prepare_response_for_collection(
				$this->prepare_item_for_response( $activity, $request )
			),
		);

		$response = rest_ensure_response( $retval );

		/**
		 * Fires after an activity item is created via the REST API.
		 *
		 * @since 5.0.0
		 *
		 * @param BP_Activity_Activity $activity The created activity.
		 * @param WP_REST_Response     $response The response data.
		 * @param WP_REST_Request      $request  The request sent to the API.
		 */
		do_action( 'bp_rest_activity_create_item', $activity, $response, $request );

		return $response;
	}