async-graphql 7.2.1

A GraphQL server library implemented in Rust
Documentation 
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#[cfg(feature = "chrono")]
use bson::DateTime as UtcDateTime;
use bson::{Bson, Document, Uuid, oid::ObjectId};
#[cfg(feature = "chrono")]
use chrono::{DateTime, Utc};

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

#[Scalar(internal)]
impl ScalarType for ObjectId {
    fn parse(value: Value) -> InputValueResult<Self> {
        match value {
            Value::String(s) => Ok(ObjectId::parse_str(s)?),
            Value::Object(o) => {
                let json = Value::Object(o).into_json()?;
                let bson = Bson::try_from(json)?;
                bson.as_object_id().ok_or_else(|| {
                    InputValueError::custom("could not parse the value as a BSON ObjectId")
                })
            }
            _ => Err(InputValueError::expected_type(value)),
        }
    }

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

#[Scalar(internal, name = "UUID")]
impl ScalarType for Uuid {
    fn parse(value: Value) -> InputValueResult<Self> {
        match value {
            Value::String(s) => Ok(Uuid::parse_str(s)?),
            Value::Object(o) => {
                let json = Value::Object(o).into_json()?;
                let Bson::Binary(binary) = Bson::try_from(json)? else {
                    return Err(InputValueError::custom(
                        "could not parse the value as BSON Binary",
                    ));
                };
                binary.to_uuid().map_err(|_| {
                    InputValueError::custom("could not deserialize BSON Binary to Uuid")
                })
            }
            _ => Err(InputValueError::expected_type(value)),
        }
    }

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

#[cfg(feature = "chrono")]
#[Scalar(internal, name = "DateTime")]
impl ScalarType for UtcDateTime {
    fn parse(value: Value) -> InputValueResult<Self> {
        <DateTime<Utc>>::parse(value)
            .map_err(InputValueError::propagate)
            .map(UtcDateTime::from_chrono)
    }

    fn to_value(&self) -> Value {
        self.to_chrono().to_value()
    }
}

#[Scalar(internal, name = "JSON")]
impl ScalarType for Bson {
    fn parse(value: Value) -> InputValueResult<Self> {
        bson::to_bson(&value).map_err(InputValueError::custom)
    }

    fn to_value(&self) -> Value {
        bson::from_bson(self.clone()).unwrap_or_default()
    }
}

#[Scalar(internal, name = "JSONObject")]
impl ScalarType for Document {
    fn parse(value: Value) -> InputValueResult<Self> {
        bson::to_document(&value).map_err(InputValueError::custom)
    }

    fn to_value(&self) -> Value {
        bson::from_document(self.clone()).unwrap_or_default()
    }
}

#[cfg(test)]
mod tests {
    use serde_json::json;

    use super::*;

    #[test]
    fn test_parse_bson_uuid() {
        let id = Uuid::new();
        let bson_value = bson::bson!(id);
        let extended_json_value = json!(bson_value);
        let gql_value = Value::from_json(extended_json_value).expect("valid json");
        assert_eq!(
            id,
            <Uuid as ScalarType>::parse(gql_value).expect("parsing succeeds")
        );
    }

    #[test]
    fn test_parse_bson_object_id() {
        let id = ObjectId::from_bytes([42; 12]);
        let bson_value = bson::bson!(id);
        let extended_json_value = json!(bson_value);
        let gql_value = Value::from_json(extended_json_value).expect("valid json");
        assert_eq!(
            id,
            <ObjectId as ScalarType>::parse(gql_value).expect("parsing succeeds")
        );
    }
}