245 lines
7.7 KiB
Rust
245 lines
7.7 KiB
Rust
use crate::context::Data;
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use crate::error::ParseRequestError;
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use crate::mutation_resolver::do_mutation_resolve;
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use crate::registry::CacheControl;
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use crate::validation::{check_rules, CheckResult};
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use crate::{do_resolve, ContextBase, Error, Result, Schema};
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use crate::{ObjectType, QueryError, Variables};
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use graphql_parser::query::{
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Definition, Document, OperationDefinition, SelectionSet, VariableDefinition,
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};
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use graphql_parser::{parse_query, Pos};
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use itertools::Itertools;
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use std::any::Any;
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use std::collections::HashMap;
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use std::path::Path;
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use std::sync::atomic::AtomicUsize;
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use tempdir::TempDir;
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#[allow(missing_docs)]
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#[async_trait::async_trait]
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pub trait IntoQueryBuilder {
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async fn into_query_builder(self) -> std::result::Result<QueryBuilder, ParseRequestError>;
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}
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/// Query response
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pub struct QueryResponse {
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/// Data of query result
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pub data: serde_json::Value,
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/// Extensions result
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pub extensions: Option<serde_json::Map<String, serde_json::Value>>,
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/// Cache control value
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pub cache_control: CacheControl,
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}
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/// Query builder
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pub struct QueryBuilder {
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pub(crate) query_source: String,
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pub(crate) operation_name: Option<String>,
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pub(crate) variables: Variables,
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pub(crate) ctx_data: Option<Data>,
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pub(crate) files_holder: Option<TempDir>,
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}
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impl QueryBuilder {
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/// Create query builder with query source.
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pub fn new<T: Into<String>>(query_source: T) -> QueryBuilder {
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QueryBuilder {
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query_source: query_source.into(),
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operation_name: None,
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variables: Default::default(),
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ctx_data: None,
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files_holder: None,
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}
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}
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/// Specify the operation name.
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pub fn operator_name<T: Into<String>>(self, name: T) -> Self {
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QueryBuilder {
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operation_name: Some(name.into()),
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..self
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}
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}
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/// Specify the variables.
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pub fn variables(self, variables: Variables) -> Self {
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QueryBuilder { variables, ..self }
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}
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/// Add a context data that can be accessed in the `Context`, you access it with `Context::data`.
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pub fn data<D: Any + Send + Sync>(mut self, data: D) -> Self {
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if let Some(ctx_data) = &mut self.ctx_data {
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ctx_data.insert(data);
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} else {
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let mut ctx_data = Data::default();
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ctx_data.insert(data);
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self.ctx_data = Some(ctx_data);
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}
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self
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}
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/// Set file holder
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pub fn set_files_holder(&mut self, files_holder: TempDir) {
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self.files_holder = Some(files_holder);
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}
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/// Set uploaded file path
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pub fn set_upload(
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&mut self,
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var_path: &str,
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filename: &str,
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content_type: Option<&str>,
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path: &Path,
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) {
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self.variables
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.set_upload(var_path, filename, content_type, path);
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}
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/// Execute the query.
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pub async fn execute<Query, Mutation, Subscription>(
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self,
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schema: &Schema<Query, Mutation, Subscription>,
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) -> Result<QueryResponse>
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where
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Query: ObjectType + Send + Sync,
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Mutation: ObjectType + Send + Sync,
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{
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// create extension instances
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let extensions = schema
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.0
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.extensions
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.iter()
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.map(|factory| factory())
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.collect_vec();
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// parse query source
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extensions
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.iter()
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.for_each(|e| e.parse_start(&self.query_source));
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let document = parse_query(&self.query_source).map_err(Into::<Error>::into)?;
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extensions.iter().for_each(|e| e.parse_end());
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// check rules
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extensions.iter().for_each(|e| e.validation_start());
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let CheckResult {
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cache_control,
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complexity,
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depth,
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} = check_rules(&schema.0.registry, &document, schema.0.validation_mode)?;
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extensions.iter().for_each(|e| e.validation_end());
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// check limit
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if let Some(limit_complexity) = schema.0.complexity {
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if complexity > limit_complexity {
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return Err(QueryError::TooComplex.into_error(Pos::default()));
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}
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}
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if let Some(limit_depth) = schema.0.depth {
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if depth > limit_depth {
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return Err(QueryError::TooDeep.into_error(Pos::default()));
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}
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}
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// execute
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let resolve_id = AtomicUsize::default();
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let mut fragments = HashMap::new();
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let (selection_set, variable_definitions, is_query) =
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current_operation(&document, self.operation_name.as_deref()).ok_or_else(|| {
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Error::Query {
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pos: Pos::default(),
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path: None,
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err: QueryError::MissingOperation,
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}
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})?;
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for definition in &document.definitions {
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if let Definition::Fragment(fragment) = &definition {
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fragments.insert(fragment.name.clone(), fragment.clone());
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}
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}
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let ctx = ContextBase {
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path_node: None,
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resolve_id: &resolve_id,
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extensions: &extensions,
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item: selection_set,
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variables: &self.variables,
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variable_definitions,
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registry: &schema.0.registry,
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data: &schema.0.data,
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ctx_data: self.ctx_data.as_ref(),
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fragments: &fragments,
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};
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extensions.iter().for_each(|e| e.execution_start());
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let data = if is_query {
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do_resolve(&ctx, &schema.0.query).await?
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} else {
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do_mutation_resolve(&ctx, &schema.0.mutation).await?
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};
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extensions.iter().for_each(|e| e.execution_end());
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let res = QueryResponse {
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data,
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extensions: if !extensions.is_empty() {
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Some(
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extensions
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.iter()
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.map(|e| (e.name().to_string(), e.result()))
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.collect::<serde_json::Map<_, _>>(),
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)
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} else {
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None
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},
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cache_control,
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};
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Ok(res)
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}
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}
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fn current_operation<'a>(
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document: &'a Document,
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operation_name: Option<&str>,
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) -> Option<(&'a SelectionSet, &'a [VariableDefinition], bool)> {
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for definition in &document.definitions {
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match definition {
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Definition::Operation(operation_definition) => match operation_definition {
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OperationDefinition::SelectionSet(s) => {
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return Some((s, &[], true));
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}
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OperationDefinition::Query(query)
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if query.name.is_none()
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|| operation_name.is_none()
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|| query.name.as_deref() == operation_name.as_deref() =>
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{
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return Some((&query.selection_set, &query.variable_definitions, true));
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}
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OperationDefinition::Mutation(mutation)
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if mutation.name.is_none()
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|| operation_name.is_none()
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|| mutation.name.as_deref() == operation_name.as_deref() =>
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{
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return Some((
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&mutation.selection_set,
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&mutation.variable_definitions,
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false,
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));
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}
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OperationDefinition::Subscription(subscription)
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if subscription.name.is_none()
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|| operation_name.is_none()
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|| subscription.name.as_deref() == operation_name.as_deref() =>
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{
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return None;
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}
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_ => {}
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},
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Definition::Fragment(_) => {}
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}
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}
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None
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}
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