185 lines
5.2 KiB
Rust
185 lines
5.2 KiB
Rust
use std::{borrow::Cow, pin::Pin};
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use indexmap::IndexMap;
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use crate::{
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futures_util::Stream,
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parser::types::Field,
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registry::{MetaType, MetaTypeId, Registry},
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CacheControl, ContainerType, Context, ContextSelectionSet, OutputType, Positioned, Response,
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ServerResult, SimpleObject, SubscriptionType, Value,
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};
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#[doc(hidden)]
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pub struct MergedObject<A, B>(pub A, pub B);
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#[async_trait::async_trait]
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impl<A, B> ContainerType for MergedObject<A, B>
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where
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A: ContainerType,
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B: ContainerType,
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{
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async fn resolve_field(&self, ctx: &Context<'_>) -> ServerResult<Option<Value>> {
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match self.0.resolve_field(ctx).await {
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Ok(Some(value)) => Ok(Some(value)),
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Ok(None) => 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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async fn find_entity(&self, ctx: &Context<'_>, params: &Value) -> ServerResult<Option<Value>> {
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match self.0.find_entity(ctx, params).await {
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Ok(Some(value)) => Ok(Some(value)),
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Ok(None) => self.1.find_entity(ctx, params).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> OutputType for MergedObject<A, B>
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where
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A: OutputType,
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B: OutputType,
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{
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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_output_type::<Self, _>(MetaTypeId::Object, |registry| {
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let mut fields = IndexMap::new();
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let mut cc = CacheControl::default();
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if let 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.create_fake_output_type::<B>()
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{
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fields.extend(b_fields);
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cc = cc.merge(&b_cc);
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}
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if let 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.create_fake_output_type::<A>()
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{
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fields.extend(a_fields);
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cc = cc.merge(&a_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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visible: None,
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is_subscription: false,
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rust_typename: std::any::type_name::<Self>(),
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}
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})
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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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unreachable!()
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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,
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B: SubscriptionType,
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{
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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_subscription_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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if let 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.create_fake_subscription_type::<B>()
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{
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fields.extend(b_fields);
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cc = cc.merge(&b_cc);
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}
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if let 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.create_fake_subscription_type::<A>()
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{
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fields.extend(a_fields);
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cc = cc.merge(&a_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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visible: None,
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is_subscription: false,
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rust_typename: std::any::type_name::<Self>(),
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}
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})
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}
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fn create_field_stream<'a>(
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&'a self,
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_ctx: &'a Context<'_>,
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) -> Option<Pin<Box<dyn Stream<Item = Response> + Send + 'a>>> {
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unreachable!()
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}
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}
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#[doc(hidden)]
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#[derive(SimpleObject, Default)]
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#[graphql(internal, fake)]
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pub struct MergedObjectTail;
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impl SubscriptionType for MergedObjectTail {
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fn type_name() -> Cow<'static, str> {
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Cow::Borrowed("MergedSubscriptionTail")
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}
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fn create_type_info(registry: &mut Registry) -> String {
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registry.create_subscription_type::<Self, _>(|_| MetaType::Object {
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name: "MergedSubscriptionTail".to_string(),
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description: None,
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fields: Default::default(),
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cache_control: Default::default(),
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extends: false,
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keys: None,
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visible: None,
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is_subscription: false,
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rust_typename: std::any::type_name::<Self>(),
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})
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}
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fn create_field_stream<'a>(
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&'a self,
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_ctx: &'a Context<'_>,
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) -> Option<Pin<Box<dyn Stream<Item = Response> + Send + 'a>>> {
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unreachable!()
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}
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}
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