260 lines
6.7 KiB
Rust
260 lines
6.7 KiB
Rust
use std::{borrow::Cow, sync::Arc};
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use async_graphql_value::ConstValue;
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use crate::{
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parser::types::Field,
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registry::{self, Registry},
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ContainerType, Context, ContextSelectionSet, Error, InputValueError, InputValueResult,
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Positioned, Result, ServerResult, Value,
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};
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#[doc(hidden)]
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pub trait Description {
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fn description() -> &'static str;
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}
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/// Used to specify the GraphQL Type name.
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pub trait TypeName: Send + Sync {
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/// Returns a GraphQL type name.
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fn type_name() -> Cow<'static, str>;
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}
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/// Represents a GraphQL input type.
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pub trait InputType: Send + Sync + Sized {
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/// The raw type used for validator.
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///
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/// Usually it is `Self`, but the wrapper type is its internal type.
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///
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/// For example:
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///
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/// `i32::RawValueType` is `i32`
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/// `Option<i32>::RawValueType` is `i32`.
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type RawValueType;
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/// Type the name.
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fn type_name() -> Cow<'static, str>;
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/// Qualified typename.
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fn qualified_type_name() -> String {
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format!("{}!", Self::type_name())
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}
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/// Create type information in the registry and return qualified typename.
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fn create_type_info(registry: &mut registry::Registry) -> String;
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/// Parse from `Value`. None represents undefined.
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fn parse(value: Option<Value>) -> InputValueResult<Self>;
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/// Convert to a `Value` for introspection.
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fn to_value(&self) -> Value;
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/// Get the federation fields, only for InputObject.
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#[doc(hidden)]
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fn federation_fields() -> Option<String> {
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None
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}
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/// Returns a reference to the raw value.
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fn as_raw_value(&self) -> Option<&Self::RawValueType>;
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}
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/// Represents a GraphQL output type.
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#[async_trait::async_trait]
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pub trait OutputType: Send + Sync {
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/// Type the name.
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fn type_name() -> Cow<'static, str>;
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/// Qualified typename.
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fn qualified_type_name() -> String {
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format!("{}!", Self::type_name())
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}
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/// Introspection type name
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///
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/// Is the return value of field `__typename`, the interface and union
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/// should return the current type, and the others return `Type::type_name`.
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fn introspection_type_name(&self) -> Cow<'static, str> {
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Self::type_name()
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}
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/// Create type information in the registry and return qualified typename.
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fn create_type_info(registry: &mut registry::Registry) -> String;
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/// Resolve an output value to `async_graphql::Value`.
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async fn resolve(
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&self,
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ctx: &ContextSelectionSet<'_>,
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field: &Positioned<Field>,
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) -> ServerResult<Value>;
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}
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#[async_trait::async_trait]
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impl<T: OutputType + ?Sized> OutputType for &T {
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fn type_name() -> Cow<'static, str> {
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T::type_name()
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}
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fn create_type_info(registry: &mut Registry) -> String {
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T::create_type_info(registry)
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}
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#[allow(clippy::trivially_copy_pass_by_ref)]
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async fn resolve(
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&self,
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ctx: &ContextSelectionSet<'_>,
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field: &Positioned<Field>,
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) -> ServerResult<Value> {
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T::resolve(*self, ctx, field).await
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}
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}
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#[async_trait::async_trait]
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impl<T: OutputType + Sync, E: Into<Error> + Send + Sync + Clone> OutputType for Result<T, E> {
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fn type_name() -> Cow<'static, str> {
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T::type_name()
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}
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fn create_type_info(registry: &mut Registry) -> String {
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T::create_type_info(registry)
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}
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async fn resolve(
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&self,
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ctx: &ContextSelectionSet<'_>,
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field: &Positioned<Field>,
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) -> ServerResult<Value> {
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match self {
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Ok(value) => value.resolve(ctx, field).await,
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Err(err) => {
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return Err(ctx.set_error_path(err.clone().into().into_server_error(field.pos)))
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}
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}
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}
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}
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/// A GraphQL object.
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pub trait ObjectType: ContainerType {}
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#[async_trait::async_trait]
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impl<T: ObjectType + ?Sized> ObjectType for &T {}
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#[async_trait::async_trait]
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impl<T: ObjectType + ?Sized> ObjectType for Box<T> {}
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#[async_trait::async_trait]
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impl<T: ObjectType + ?Sized> ObjectType for Arc<T> {}
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/// A GraphQL interface.
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pub trait InterfaceType: ContainerType {}
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/// A GraphQL interface.
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pub trait UnionType: ContainerType {}
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/// A GraphQL input object.
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pub trait InputObjectType: InputType {}
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/// A GraphQL oneof input object.
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pub trait OneofObjectType: InputObjectType {}
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#[async_trait::async_trait]
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impl<T: OutputType + ?Sized> OutputType for Box<T> {
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fn type_name() -> Cow<'static, str> {
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T::type_name()
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}
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fn create_type_info(registry: &mut Registry) -> String {
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T::create_type_info(registry)
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}
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#[allow(clippy::trivially_copy_pass_by_ref)]
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async fn resolve(
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&self,
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ctx: &ContextSelectionSet<'_>,
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field: &Positioned<Field>,
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) -> ServerResult<Value> {
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T::resolve(&**self, ctx, field).await
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}
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}
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#[async_trait::async_trait]
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impl<T: InputType> InputType for Box<T> {
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type RawValueType = T::RawValueType;
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fn type_name() -> Cow<'static, str> {
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T::type_name()
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}
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fn create_type_info(registry: &mut Registry) -> String {
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T::create_type_info(registry)
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}
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fn parse(value: Option<ConstValue>) -> InputValueResult<Self> {
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T::parse(value)
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.map(Box::new)
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.map_err(InputValueError::propagate)
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}
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fn to_value(&self) -> ConstValue {
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T::to_value(&self)
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}
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fn as_raw_value(&self) -> Option<&Self::RawValueType> {
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self.as_ref().as_raw_value()
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}
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}
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#[async_trait::async_trait]
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impl<T: OutputType + ?Sized> OutputType for Arc<T> {
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fn type_name() -> Cow<'static, str> {
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T::type_name()
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}
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fn create_type_info(registry: &mut Registry) -> String {
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T::create_type_info(registry)
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}
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#[allow(clippy::trivially_copy_pass_by_ref)]
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async fn resolve(
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&self,
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ctx: &ContextSelectionSet<'_>,
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field: &Positioned<Field>,
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) -> ServerResult<Value> {
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T::resolve(&**self, ctx, field).await
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}
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}
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impl<T: InputType> InputType for Arc<T> {
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type RawValueType = T::RawValueType;
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fn type_name() -> Cow<'static, str> {
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T::type_name()
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}
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fn create_type_info(registry: &mut Registry) -> String {
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T::create_type_info(registry)
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}
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fn parse(value: Option<ConstValue>) -> InputValueResult<Self> {
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T::parse(value)
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.map(Arc::new)
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.map_err(InputValueError::propagate)
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}
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fn to_value(&self) -> ConstValue {
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T::to_value(&self)
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}
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fn as_raw_value(&self) -> Option<&Self::RawValueType> {
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self.as_ref().as_raw_value()
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}
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}
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#[doc(hidden)]
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#[async_trait::async_trait]
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pub trait ComplexObject {
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fn fields(registry: &mut registry::Registry) -> Vec<(String, registry::MetaField)>;
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async fn resolve_field(&self, ctx: &Context<'_>) -> ServerResult<Option<Value>>;
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}
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