1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100

use std::borrow::Cow;
use std::fmt::Display;
use std::hash::Hash;
use std::str::FromStr;

use async_graphql_parser::types::Field;
use async_graphql_parser::Positioned;
use async_graphql_value::{from_value, to_value};
use hashbrown::HashMap;
use indexmap::IndexMap;
use serde::de::DeserializeOwned;
use serde::Serialize;
use std::collections::HashMap as StdHashMap;

use crate::registry::Registry;
use crate::{
    ContextSelectionSet, InputType, InputValueError, InputValueResult, Name, OutputType,
    ServerResult, Value,
};

impl<K, V> InputType for HashMap<K, V>
where
    K: ToString + FromStr + Eq + Hash + Send + Sync,
    K::Err: Display,
    V: Serialize + DeserializeOwned + Send + Sync,
{
    type RawValueType = Self;

    fn type_name() -> Cow<'static, str> {
        <StdHashMap<K, V> as InputType>::type_name()
    }

    fn create_type_info(registry: &mut Registry) -> String {
        <StdHashMap<K, V> as InputType>::create_type_info(registry)
    }

    fn parse(value: Option<Value>) -> InputValueResult<Self> {
        let value = value.unwrap_or_default();
        match value {
            Value::Object(map) => map
                .into_iter()
                .map(|(name, value)| {
                    Ok((
                        K::from_str(&name).map_err(|err| {
                            InputValueError::<Self>::custom(format!("object key: {}", err))
                        })?,
                        from_value(value).map_err(|err| format!("object value: {}", err))?,
                    ))
                })
                .collect::<Result<_, _>>()
                .map_err(InputValueError::propagate),
            _ => Err(InputValueError::expected_type(value)),
        }
    }

    fn to_value(&self) -> Value {
        let mut map = IndexMap::new();
        for (name, value) in self {
            map.insert(
                Name::new(name.to_string()),
                to_value(value).unwrap_or_default(),
            );
        }
        Value::Object(map)
    }

    fn as_raw_value(&self) -> Option<&Self::RawValueType> {
        Some(self)
    }
}

#[async_trait::async_trait]
impl<K, V> OutputType for HashMap<K, V>
where
    K: ToString + Eq + Hash + Send + Sync,
    V: Serialize + Send + Sync,
{
    fn type_name() -> Cow<'static, str> {
        <StdHashMap<K, V> as OutputType>::type_name()
    }

    fn create_type_info(registry: &mut Registry) -> String {
        <StdHashMap<K, V> as OutputType>::create_type_info(registry)
    }

    async fn resolve(
        &self,
        _ctx: &ContextSelectionSet<'_>,
        _field: &Positioned<Field>,
    ) -> ServerResult<Value> {
        let mut map = IndexMap::new();
        for (name, value) in self {
            map.insert(
                Name::new(name.to_string()),
                to_value(value).unwrap_or_default(),
            );
        }
        Ok(Value::Object(map))
    }
}