105 lines
2.4 KiB
Dart
105 lines
2.4 KiB
Dart
import 'package:source_span/source_span.dart';
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import '../token.dart';
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import 'input_value.dart';
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import 'node.dart';
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/// A GraphQL `null` literal.
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class NullValueContext extends InputValueContext<Null> {
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/// The source token.
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final Token nullToken;
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NullValueContext(this.nullToken);
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/// Use [nullToken] instead.
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@deprecated
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Token get NULL => nullToken;
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@override
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FileSpan get span => nullToken.span;
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@override
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Null computeValue(Map<String, dynamic> variables) => null;
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}
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/// A GraphQL enumeration literal.
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class EnumValueContext extends InputValueContext<String> {
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/// The source token.
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final Token nameToken;
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EnumValueContext(this.nameToken);
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/// Use [nameToken] instead.
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@deprecated
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Token get NAME => nameToken;
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@override
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FileSpan get span => nameToken.span;
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@override
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String computeValue(Map<String, dynamic> variables) => nameToken.span.text;
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}
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/// A GraphQL object literal.
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class ObjectValueContext extends InputValueContext<Map<String, dynamic>> {
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/// The source tokens.
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final Token lBraceToken, rBraceToken;
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/// The fields in the object.
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final List<ObjectFieldContext> fields;
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ObjectValueContext(this.lBraceToken, this.fields, this.rBraceToken);
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/// Use [lBraceToken] instead.
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Token get LBRACE => lBraceToken;
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/// Use [rBraceToken] instead.
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@deprecated
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Token get RBRACE => rBraceToken;
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@override
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FileSpan get span {
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var left = lBraceToken.span;
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for (var field in fields) {
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left = left.expand(field.span);
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}
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return left.expand(rBraceToken.span);
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}
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@override
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Map<String, dynamic> computeValue(Map<String, dynamic> variables) {
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if (fields.isEmpty) {
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return <String, dynamic>{};
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} else {
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return fields.fold<Map<String, dynamic>>(<String, dynamic>{},
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(map, field) {
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return map
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..[field.nameToken.text] = field.value.computeValue(variables);
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});
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}
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}
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}
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/// A field within an [ObjectValueContext].
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class ObjectFieldContext extends Node {
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/// The source tokens.
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final Token nameToken, colonToken;
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/// The associated value.
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final InputValueContext value;
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ObjectFieldContext(this.nameToken, this.colonToken, this.value);
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/// Use [nameToken] instead.
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@deprecated
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Token get NAME => nameToken;
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/// Use [colonToken] instead.
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@deprecated
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Token get COLON => colonToken;
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@override
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FileSpan get span =>
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nameToken.span.expand(colonToken.span).expand(value.span);
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}
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