surrealpatch/src/sql/version.rs

use crate::sql::comment::shouldbespace;
use crate::sql::datetime::{datetime, Datetime};
use nom::bytes::complete::tag_no_case;
use nom::IResult;
use serde::{Deserialize, Serialize};
use std::fmt;

#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
pub struct Version {
	pub expr: Datetime,
}

impl fmt::Display for Version {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		write!(f, "VERSION {}", self.expr)
	}
}

pub fn version(i: &str) -> IResult<&str, Version> {
	let (i, _) = tag_no_case("VERSION")(i)?;
	let (i, _) = shouldbespace(i)?;
	let (i, v) = datetime(i)?;
	Ok((
		i,
		Version {
			expr: v,
		},
	))
}

#[cfg(test)]
mod tests {

	use super::*;

	#[test]
	fn version_statement() {
		let sql = "VERSION '2020-01-01'";
		let res = version(sql);
		assert!(res.is_ok());
		let out = res.unwrap().1;
		assert_eq!(
			out,
			Version {
				expr: Datetime::from("2020-01-01")
			}
		);
		assert_eq!("VERSION \"2020-01-01T00:00:00Z\"", format!("{}", out));
	}
}