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valueFromASTUntyped.ts
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valueFromASTUntyped.ts
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import type { ObjMap } from '../jsutils/ObjMap';
import { keyValMap } from '../jsutils/keyValMap';
import type { Maybe } from '../jsutils/Maybe';
import { Kind } from '../language/kinds';
import type { ValueNode } from '../language/ast';
/**
* Produces a JavaScript value given a GraphQL Value AST.
*
* Unlike `valueFromAST()`, no type is provided. The resulting JavaScript value
* will reflect the provided GraphQL value AST.
*
* | GraphQL Value | JavaScript Value |
* | -------------------- | ---------------- |
* | Input Object | Object |
* | List | Array |
* | Boolean | Boolean |
* | String / Enum | String |
* | Int / Float | Number |
* | Null | null |
*
*/
export function valueFromASTUntyped(
valueNode: ValueNode,
variables?: Maybe<ObjMap<unknown>>,
): unknown {
switch (valueNode.kind) {
case Kind.NULL:
return null;
case Kind.INT:
return parseInt(valueNode.value, 10);
case Kind.FLOAT:
return parseFloat(valueNode.value);
case Kind.STRING:
case Kind.ENUM:
case Kind.BOOLEAN:
return valueNode.value;
case Kind.LIST:
return valueNode.values.map((node) =>
valueFromASTUntyped(node, variables),
);
case Kind.OBJECT:
return keyValMap(
valueNode.fields,
(field) => field.name.value,
(field) => valueFromASTUntyped(field.value, variables),
);
case Kind.VARIABLE:
return variables?.[valueNode.name.value];
}
}