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38 lines
1.3 KiB
TypeScript
38 lines
1.3 KiB
TypeScript
// Loaded from https://deno.land/x/graphql_deno@v15.0.0/lib/utilities/typeFromAST.js
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import inspect from '../jsutils/inspect.js';
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import invariant from '../jsutils/invariant.js';
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import { Kind } from '../language/kinds.js';
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import { GraphQLList, GraphQLNonNull } from '../type/definition.js';
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/**
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* Given a Schema and an AST node describing a type, return a GraphQLType
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* definition which applies to that type. For example, if provided the parsed
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* AST node for `[User]`, a GraphQLList instance will be returned, containing
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* the type called "User" found in the schema. If a type called "User" is not
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* found in the schema, then undefined will be returned.
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*/
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/* eslint-disable no-redeclare */
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export function typeFromAST(schema, typeNode) {
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/* eslint-enable no-redeclare */
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let innerType;
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if (typeNode.kind === Kind.LIST_TYPE) {
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innerType = typeFromAST(schema, typeNode.type);
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return innerType && GraphQLList(innerType);
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}
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if (typeNode.kind === Kind.NON_NULL_TYPE) {
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innerType = typeFromAST(schema, typeNode.type);
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return innerType && GraphQLNonNull(innerType);
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}
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if (typeNode.kind === Kind.NAMED_TYPE) {
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return schema.getType(typeNode.name.value);
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} // Not reachable. All possible type nodes have been considered.
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invariant(false, 'Unexpected type node: ' + inspect(typeNode));
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} |