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Mirror: The spec-compliant minimum of client-side GraphQL.
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2.3 kB · 77 lines
TypeScript
at main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778import type { TypeNode, ValueNode } from './ast';import type { Maybe } from './types';
export function valueFromASTUntyped( node: ValueNode, variables?: Maybe<Record<string, any>>): unknown { switch (node.kind) { case 'NullValue': return null; case 'IntValue': return parseInt(node.value, 10); case 'FloatValue': return parseFloat(node.value); case 'StringValue': case 'EnumValue': case 'BooleanValue': return node.value; case 'ListValue': { const values: unknown[] = []; for (let i = 0, l = node.values.length; i < l; i++) values.push(valueFromASTUntyped(node.values[i], variables)); return values; } case 'ObjectValue': { const obj = Object.create(null); for (let i = 0, l = node.fields.length; i < l; i++) { const field = node.fields[i]; obj[field.name.value] = valueFromASTUntyped(field.value, variables); } return obj; } case 'Variable': return variables && variables[node.name.value]; }}
export function valueFromTypeNode( node: ValueNode, type: TypeNode, variables?: Maybe<Record<string, any>>): unknown { if (node.kind === 'Variable') { const variableName = node.name.value; return variables ? valueFromTypeNode(variables[variableName], type, variables) : undefined; } else if (type.kind === 'NonNullType') { return node.kind !== 'NullValue' ? valueFromTypeNode(node, type, variables) : undefined; } else if (node.kind === 'NullValue') { return null; } else if (type.kind === 'ListType') { if (node.kind === 'ListValue') { const values: unknown[] = []; for (let i = 0, l = node.values.length; i < l; i++) { const value = node.values[i]; const coerced = valueFromTypeNode(value, type.type, variables); if (coerced === undefined) { return undefined; } else { values.push(coerced); } } return values; } } else if (type.kind === 'NamedType') { switch (type.name.value) { case 'Int': case 'Float': case 'String': case 'Bool': return type.name.value + 'Value' === node.kind ? valueFromASTUntyped(node, variables) : undefined; default: return valueFromASTUntyped(node, variables); } }}