26 lines
781 B
Rust
26 lines
781 B
Rust
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use crate::{ContextBase, Result, Type};
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use graphql_parser::query::Field;
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use std::any::{Any, TypeId};
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use std::collections::HashMap;
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/// Represents a GraphQL subscription object
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#[async_trait::async_trait]
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pub trait SubscriptionType: Type {
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/// This function returns true of type `EmptySubscription` only
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#[doc(hidden)]
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fn is_empty() -> bool {
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false
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}
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#[doc(hidden)]
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fn create_type(field: &Field, types: &mut HashMap<TypeId, Field>) -> Result<()>;
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/// Resolve a subscription message, If no message of this type is subscribed, None is returned.
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async fn resolve(
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&self,
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ctx: &ContextBase<'_, ()>,
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types: &HashMap<TypeId, Field>,
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msg: &(dyn Any + Send + Sync),
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) -> Result<Option<serde_json::Value>>;
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}
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