154 lines
4.2 KiB
Rust
154 lines
4.2 KiB
Rust
//! Extensions for schema
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mod apollo_tracing;
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mod logger;
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mod tracing;
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use crate::context::{QueryPathNode, ResolveId};
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use crate::{Result, Variables};
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pub use self::apollo_tracing::ApolloTracing;
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pub use self::logger::Logger;
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pub use self::tracing::Tracing;
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use crate::Error;
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use async_graphql_parser::query::Document;
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use serde_json::Value;
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pub(crate) type BoxExtension = Box<dyn Extension>;
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#[doc(hidden)]
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pub struct Extensions(pub(crate) Vec<BoxExtension>);
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/// Parameters for `Extension::resolve_field_start`
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pub struct ResolveInfo<'a> {
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/// Because resolver is concurrent, `Extension::resolve_field_start` and `Extension::resolve_field_end` are
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/// not strictly ordered, so each pair is identified by an id.
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pub resolve_id: ResolveId,
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/// Current path node, You can go through the entire path.
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pub path_node: &'a QueryPathNode<'a>,
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/// Parent type
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pub parent_type: &'a str,
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/// Current return type, is qualified name.
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pub return_type: &'a str,
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}
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/// Represents a GraphQL extension
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#[allow(unused_variables)]
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pub trait Extension: Sync + Send + 'static {
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/// If this extension needs to output data to query results, you need to specify a name.
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fn name(&self) -> Option<&'static str> {
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None
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}
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/// Called at the begin of the parse.
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fn parse_start(&mut self, query_source: &str, variables: &Variables) {}
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/// Called at the end of the parse.
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fn parse_end(&mut self, document: &Document) {}
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/// Called at the begin of the validation.
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fn validation_start(&mut self) {}
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/// Called at the end of the validation.
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fn validation_end(&mut self) {}
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/// Called at the begin of the execution.
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fn execution_start(&mut self) {}
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/// Called at the end of the execution.
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fn execution_end(&mut self) {}
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/// Called at the begin of the resolve field.
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fn resolve_start(&mut self, info: &ResolveInfo<'_>) {}
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/// Called at the end of the resolve field.
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fn resolve_end(&mut self, info: &ResolveInfo<'_>) {}
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/// Called when an error occurs.
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fn error(&mut self, err: &Error) {}
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/// Get the results
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fn result(&mut self) -> Option<serde_json::Value> {
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None
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}
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}
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pub(crate) trait ErrorLogger {
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fn log_error(self, extensions: &spin::Mutex<Extensions>) -> Self;
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}
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impl<T> ErrorLogger for Result<T> {
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fn log_error(self, extensions: &spin::Mutex<Extensions>) -> Self {
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if let Err(err) = &self {
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extensions.lock().error(err);
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}
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self
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}
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}
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impl Extension for Extensions {
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fn parse_start(&mut self, query_source: &str, variables: &Variables) {
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self.0
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.iter_mut()
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.for_each(|e| e.parse_start(query_source, variables));
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}
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fn parse_end(&mut self, document: &Document) {
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self.0.iter_mut().for_each(|e| e.parse_end(document));
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}
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fn validation_start(&mut self) {
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self.0.iter_mut().for_each(|e| e.validation_start());
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}
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fn validation_end(&mut self) {
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self.0.iter_mut().for_each(|e| e.validation_end());
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}
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fn execution_start(&mut self) {
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self.0.iter_mut().for_each(|e| e.execution_start());
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}
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fn execution_end(&mut self) {
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self.0.iter_mut().for_each(|e| e.execution_end());
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}
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fn resolve_start(&mut self, info: &ResolveInfo<'_>) {
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self.0.iter_mut().for_each(|e| e.resolve_start(info));
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}
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fn resolve_end(&mut self, resolve_id: &ResolveInfo<'_>) {
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self.0.iter_mut().for_each(|e| e.resolve_end(resolve_id));
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}
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fn error(&mut self, err: &Error) {
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self.0.iter_mut().for_each(|e| e.error(err));
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}
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fn result(&mut self) -> Option<Value> {
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if !self.0.is_empty() {
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let value = self
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.0
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.iter_mut()
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.filter_map(|e| {
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if let Some(name) = e.name() {
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e.result().map(|res| (name.to_string(), res))
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} else {
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None
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}
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})
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.collect::<serde_json::Map<_, _>>();
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if value.is_empty() {
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None
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} else {
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Some(value.into())
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}
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} else {
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None
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}
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}
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}
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