feat(graphql_parser): parse input object type extension

crates/biome_graphql_parser/src/parser/definitions/input_object.rs

@@ -1,6 +1,8 @@
 use crate::parser::{
-    directive::DirectiveList, parse_description, parse_error::expected_name, parse_name,
-    GraphqlParser,
+    directive::DirectiveList,
+    parse_description,
+    parse_error::{expected_input_object_extension, expected_name},
+    parse_name, GraphqlParser,
 };
 use biome_graphql_syntax::{
     GraphqlSyntaxKind::{self, *},
@@ -32,6 +34,28 @@ pub(crate) fn parse_input_object_type_definition(p: &mut GraphqlParser) -> Parse
     Present(m.complete(p, GRAPHQL_INPUT_OBJECT_TYPE_DEFINITION))
 }
 
+/// Must only be called if the next 2 token is `extend` and `input`, otherwise it will panic.
+#[inline]
+pub(crate) fn parse_input_object_type_extension(p: &mut GraphqlParser) -> ParsedSyntax {
+    let m = p.start();
+
+    p.bump(T![extend]);
+    p.expect(T![input]);
+
+    parse_name(p).or_add_diagnostic(p, expected_name);
+
+    let directive_list = DirectiveList.parse_list(p);
+    let directive_empty = directive_list.range(p).is_empty();
+
+    let input_fields_empty = parse_input_fields_definition(p).is_absent();
+
+    if directive_empty && input_fields_empty {
+        p.error(expected_input_object_extension(p, p.cur_range()));
+    }
+
+    Present(m.complete(p, GRAPHQL_INPUT_OBJECT_TYPE_EXTENSION))
+}
+
 #[inline]
 fn parse_input_fields_definition(p: &mut GraphqlParser) -> ParsedSyntax {
     if !is_at_input_fields_definition(p) {

crates/biome_graphql_parser/src/parser/definitions/mod.rs

@@ -23,7 +23,7 @@ use biome_parser::{
 use self::{
     directive::parse_directive_definition,
     fragment::parse_fragment_definition,
-    input_object::parse_input_object_type_definition,
+    input_object::{parse_input_object_type_definition, parse_input_object_type_extension},
     interface::{parse_interface_type_definition, parse_interface_type_extension},
     object::{parse_object_type_definition, parse_object_type_extension},
     operation::{parse_operation_definition, parse_selection_set},
@@ -102,6 +102,7 @@ fn parse_extension(p: &mut GraphqlParser) -> ParsedSyntax {
         T![interface] => parse_interface_type_extension(p),
         T![union] => parse_union_type_extension(p),
         T![enum] => parse_enum_type_extension(p),
+        T![input] => parse_input_object_type_extension(p),
         _ => Absent,
     }
 }

crates/biome_graphql_parser/src/parser/parse_error.rs

@@ -127,3 +127,13 @@ pub(crate) fn expected_enum_extension(p: &GraphqlParser, range: TextRange) -> Pa
         range,
     )
 }
+
+pub(crate) fn expected_input_object_extension(
+    p: &GraphqlParser,
+    range: TextRange,
+) -> ParseDiagnostic {
+    p.err_builder(
+        "Expected at least one directive or a set of fields definition",
+        range,
+    )
+}

crates/biome_graphql_parser/tests/graphql_test_suite/err/definitions/input_object_extension.graphql

@@ -0,0 +1,6 @@
+extend input Point2D
+
+extend input Point2D
+  x: Float
+  y: Float
+}