async-graphql 7.2.1

A GraphQL server library implemented in Rust
Documentation 
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use chrono::{DateTime, FixedOffset, Local, Utc};

use crate::{InputValueError, InputValueResult, Scalar, ScalarType, Value};

/// Implement the DateTime<FixedOffset> scalar
///
/// The input/output is a string in RFC3339 format.
#[Scalar(
    internal,
    name = "DateTime",
    specified_by_url = "https://datatracker.ietf.org/doc/html/rfc3339"
)]
impl ScalarType for DateTime<FixedOffset> {
    fn parse(value: Value) -> InputValueResult<Self> {
        match &value {
            Value::String(s) => Ok(s.parse::<DateTime<FixedOffset>>()?),
            _ => Err(InputValueError::expected_type(value)),
        }
    }

    fn to_value(&self) -> Value {
        Value::String(self.to_rfc3339())
    }
}

/// Implement the DateTime<Local> scalar
///
/// The input/output is a string in RFC3339 format.
#[Scalar(
    internal,
    name = "DateTime",
    specified_by_url = "https://datatracker.ietf.org/doc/html/rfc3339"
)]
impl ScalarType for DateTime<Local> {
    fn parse(value: Value) -> InputValueResult<Self> {
        match &value {
            Value::String(s) => Ok(s.parse::<DateTime<Local>>()?),
            _ => Err(InputValueError::expected_type(value)),
        }
    }

    fn to_value(&self) -> Value {
        Value::String(self.to_rfc3339())
    }
}

/// Implement the DateTime<Utc> scalar
///
/// The input/output is a string in RFC3339 format.
#[Scalar(
    internal,
    name = "DateTime",
    specified_by_url = "https://datatracker.ietf.org/doc/html/rfc3339"
)]
impl ScalarType for DateTime<Utc> {
    fn parse(value: Value) -> InputValueResult<Self> {
        match &value {
            Value::String(s) => Ok(s.parse::<DateTime<Utc>>()?),
            _ => Err(InputValueError::expected_type(value)),
        }
    }

    fn to_value(&self) -> Value {
        Value::String(self.to_rfc3339())
    }
}