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use crate::extensions::ResolveInfo;
use crate::{ContextSelectionSet, Error, ObjectType, QueryError, Result};
use graphql_parser::query::{Selection, TypeCondition};
use std::future::Future;
use std::pin::Pin;
type BoxMutationFuture<'a> = Pin<Box<dyn Future<Output = Result<()>> + Send + 'a>>;
#[allow(missing_docs)]
pub async fn do_mutation_resolve<'a, T: ObjectType + Send + Sync>(
ctx: &'a ContextSelectionSet<'a>,
root: &'a T,
) -> Result<serde_json::Value> {
let mut values = serde_json::Map::new();
do_resolve(ctx, root, &mut values).await?;
Ok(values.into())
}
fn do_resolve<'a, T: ObjectType + Send + Sync>(
ctx: &'a ContextSelectionSet<'a>,
root: &'a T,
values: &'a mut serde_json::Map<String, serde_json::Value>,
) -> BoxMutationFuture<'a> {
Box::pin(async move {
if ctx.items.is_empty() {
return Err(Error::Query {
pos: ctx.span.0,
path: None,
err: QueryError::MustHaveSubFields {
object: T::type_name().to_string(),
},
});
}
for selection in &ctx.item.items {
match selection {
Selection::Field(field) => {
if ctx.is_skip(&field.directives)? {
continue;
}
if field.name.as_str() == "__typename" {
values.insert(
"__typename".to_string(),
root.introspection_type_name().to_string().into(),
);
continue;
}
let ctx_field = ctx.with_field(field);
let field_name = ctx_field.result_name().to_string();
if !ctx_field.extensions.is_empty() {
let resolve_info = ResolveInfo {
resolve_id: ctx_field.resolve_id,
path_node: ctx_field.path_node.as_ref().unwrap(),
parent_type: &T::type_name(),
return_type: match ctx_field
.registry
.types
.get(T::type_name().as_ref())
.and_then(|ty| ty.field_by_name(field.name.as_str()))
.map(|field| &field.ty)
{
Some(ty) => &ty,
None => {
return Err(Error::Query {
pos: field.position,
path: None,
err: QueryError::FieldNotFound {
field_name: field.name.clone(),
object: T::type_name().to_string(),
},
});
}
},
};
ctx_field
.extensions
.iter()
.for_each(|e| e.resolve_field_start(&resolve_info));
}
let value = root.resolve_field(&ctx_field).await?;
values.insert(field_name, value);
if !ctx_field.extensions.is_empty() {
ctx_field
.extensions
.iter()
.for_each(|e| e.resolve_field_end(ctx_field.resolve_id));
}
}
Selection::FragmentSpread(fragment_spread) => {
if ctx.is_skip(&fragment_spread.directives)? {
continue;
}
if let Some(fragment) =
ctx.fragments.get(fragment_spread.fragment_name.as_str())
{
do_resolve(
&ctx.with_selection_set(&fragment.selection_set),
root,
values,
)
.await?;
} else {
return Err(Error::Query {
pos: fragment_spread.position,
path: None,
err: QueryError::UnknownFragment {
name: fragment_spread.fragment_name.clone(),
},
});
}
}
Selection::InlineFragment(inline_fragment) => {
if ctx.is_skip(&inline_fragment.directives)? {
continue;
}
if let Some(TypeCondition::On(name)) = &inline_fragment.type_condition {
let mut futures = Vec::new();
root.collect_inline_fields(
name,
inline_fragment.position,
&ctx.with_selection_set(&inline_fragment.selection_set),
&mut futures,
)?;
for fut in futures {
let (name, value) = fut.await?;
values.insert(name, value);
}
} else {
do_resolve(
&ctx.with_selection_set(&inline_fragment.selection_set),
root,
values,
)
.await?;
}
}
}
}
Ok(())
})
}