50 lines
1.3 KiB
Rust
50 lines
1.3 KiB
Rust
use crate::parser::types::Field;
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use crate::{
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registry, ContextSelectionSet, InputValueError, InputValueResult, OutputValueType, Positioned,
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Scalar, ScalarType, ServerResult, Type, Value,
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};
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use std::borrow::Cow;
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/// The `String` scalar type represents textual data, represented as UTF-8 character sequences. The String type is most often used by GraphQL to represent free-form human-readable text.
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#[Scalar(internal)]
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impl ScalarType for String {
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fn parse(value: Value) -> InputValueResult<Self> {
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match value {
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Value::String(s) => Ok(s),
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_ => Err(InputValueError::expected_type(value)),
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}
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}
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fn is_valid(value: &Value) -> bool {
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match value {
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Value::String(_) => true,
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_ => false,
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}
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}
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fn to_value(&self) -> Value {
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Value::String(self.clone())
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}
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}
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impl<'a> Type for &'a str {
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fn type_name() -> Cow<'static, str> {
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Cow::Borrowed("String")
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}
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fn create_type_info(registry: &mut registry::Registry) -> String {
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<String as Type>::create_type_info(registry)
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}
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}
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#[async_trait::async_trait]
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impl<'a> OutputValueType for &'a str {
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async fn resolve(
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&self,
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_: &ContextSelectionSet<'_>,
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_field: &Positioned<Field>,
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) -> ServerResult<Value> {
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Ok(Value::String((*self).to_string()))
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}
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}
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