146 lines
3.9 KiB
Rust
146 lines
3.9 KiB
Rust
use crate::parser::types::Field;
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use crate::registry::{MetaType, Registry};
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use crate::resolver_utils::{resolve_object, ObjectType};
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use crate::{
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CacheControl, Context, ContextSelectionSet, Error, OutputValueType, Positioned, QueryEnv,
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QueryError, Response, Result, SchemaEnv, SubscriptionType, Type,
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};
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use futures::Stream;
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use indexmap::IndexMap;
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use std::borrow::Cow;
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use std::pin::Pin;
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#[doc(hidden)]
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pub struct MergedObject<A, B>(pub A, pub B);
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impl<A, B> Default for MergedObject<A, B>
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where
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A: Default,
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B: Default,
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{
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fn default() -> Self {
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Self(A::default(), B::default())
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}
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}
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impl<A: Type, B: Type> Type for MergedObject<A, B> {
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fn type_name() -> Cow<'static, str> {
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Cow::Owned(format!("{}_{}", A::type_name(), B::type_name()))
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}
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fn create_type_info(registry: &mut Registry) -> String {
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registry.create_type::<Self, _>(|registry| {
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let mut fields = IndexMap::new();
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let mut cc = CacheControl::default();
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A::create_type_info(registry);
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if let Some(MetaType::Object {
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fields: a_fields,
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cache_control: a_cc,
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..
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}) = registry.types.remove(&*A::type_name())
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{
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fields.extend(a_fields);
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cc.merge(&a_cc);
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}
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B::create_type_info(registry);
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if let Some(MetaType::Object {
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fields: b_fields,
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cache_control: b_cc,
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..
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}) = registry.types.remove(&*B::type_name())
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{
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fields.extend(b_fields);
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cc.merge(&b_cc);
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}
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MetaType::Object {
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name: Self::type_name().to_string(),
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description: None,
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fields,
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cache_control: cc,
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extends: false,
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keys: None,
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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, B> ObjectType for MergedObject<A, B>
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where
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A: ObjectType + Send + Sync,
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B: ObjectType + Send + Sync,
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{
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async fn resolve_field(&self, ctx: &Context<'_>) -> Result<serde_json::Value> {
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match self.0.resolve_field(ctx).await {
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Ok(value) => Ok(value),
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Err(Error::Query {
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err: QueryError::FieldNotFound { .. },
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..
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}) => self.1.resolve_field(ctx).await,
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Err(err) => Err(err),
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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, B> OutputValueType for MergedObject<A, B>
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where
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A: ObjectType + Send + Sync,
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B: ObjectType + Send + Sync,
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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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) -> Result<serde_json::Value> {
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resolve_object(ctx, self).await
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}
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}
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#[async_trait::async_trait]
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impl<A, B> SubscriptionType for MergedObject<A, B>
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where
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A: SubscriptionType + Send + Sync,
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B: SubscriptionType + Send + Sync,
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{
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async fn create_field_stream(
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&self,
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idx: usize,
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ctx: &Context<'_>,
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schema_env: SchemaEnv,
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query_env: QueryEnv,
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) -> Result<Pin<Box<dyn Stream<Item = Response> + Send>>> {
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match self
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.0
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.create_field_stream(idx, ctx, schema_env.clone(), query_env.clone())
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.await
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{
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Ok(value) => Ok(value),
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Err(Error::Query {
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err: QueryError::FieldNotFound { .. },
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..
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}) => {
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self.1
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.create_field_stream(idx, ctx, schema_env, query_env)
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.await
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}
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Err(err) => Err(err),
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}
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}
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}
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#[doc(hidden)]
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#[async_graphql_derive::SimpleObject(internal)]
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#[derive(Default)]
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pub struct MergedObjectTail;
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#[doc(hidden)]
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#[derive(Default)]
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pub struct MergedObjectSubscriptionTail;
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#[async_graphql_derive::Subscription(internal)]
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impl MergedObjectSubscriptionTail {}
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