62 lines
2.1 KiB
Rust
62 lines
2.1 KiB
Rust
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use crate::context::DeferList;
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use crate::registry::Registry;
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use crate::{ContextSelectionSet, OutputValueType, Pos, QueryResponse, Result, Type};
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use std::borrow::Cow;
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use std::sync::atomic::AtomicUsize;
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pub struct Deferred<T: Type + Send + Sync + Clone + 'static>(T);
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impl<T: Type + Send + Sync + Clone + 'static> From<T> for Deferred<T> {
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fn from(value: T) -> Self {
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Self(value)
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}
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}
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impl<T: Type + Send + Sync + Clone + 'static> Type for Deferred<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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}
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#[async_trait::async_trait]
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impl<T: OutputValueType + Send + Sync + Clone + 'static> OutputValueType for Deferred<T> {
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async fn resolve(&self, ctx: &ContextSelectionSet<'_>, pos: Pos) -> Result<serde_json::Value> {
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if let Some(defer_list) = ctx.defer_list {
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let obj = self.0.clone();
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let schema_env = ctx.schema_env.clone();
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let query_env = ctx.query_env.clone();
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let field_selection_set = ctx.item.clone();
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let path = ctx.path_node.as_ref().map(|path| path.to_json());
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defer_list.append(async move {
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let inc_resolve_id = AtomicUsize::default();
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let defer_list = DeferList::default();
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let ctx = query_env.create_context(
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&schema_env,
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None,
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&field_selection_set,
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&inc_resolve_id,
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Some(&defer_list),
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);
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let data = obj.resolve(&ctx, pos).await?;
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Ok((
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QueryResponse {
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path,
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data,
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extensions: None,
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cache_control: Default::default(),
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},
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defer_list,
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))
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});
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Ok(serde_json::Value::Null)
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} else {
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OutputValueType::resolve(&self.0, ctx, pos).await
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}
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}
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}
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