66 lines
1.6 KiB
Rust
66 lines
1.6 KiB
Rust
use crate::{
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impl_scalar_internal, registry, ContextSelectionSet, OutputValueType, Pos, Result, Scalar,
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Type, Value,
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};
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use std::borrow::Cow;
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const STRING_DESC: &str = "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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impl Scalar for String {
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fn type_name() -> &'static str {
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"String"
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}
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fn description() -> Option<&'static str> {
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Some(STRING_DESC)
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}
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fn parse(value: &Value) -> Option<Self> {
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match value {
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Value::String(s) => Some(s.clone()),
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_ => None,
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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_json(&self) -> Result<serde_json::Value> {
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Ok(self.clone().into())
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}
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}
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impl_scalar_internal!(String);
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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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registry.create_type::<Self, _>(|_| registry::Type::Scalar {
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name: Self::type_name().to_string(),
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description: Some(STRING_DESC),
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is_valid: |value| 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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}
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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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value: &Self,
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_: &ContextSelectionSet<'_>,
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_pos: Pos,
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) -> Result<serde_json::Value> {
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Ok((*value).into())
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}
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}
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