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310 lines
8.5 KiB
Plaintext
310 lines
8.5 KiB
Plaintext
import { inspect } from '../jsutils/inspect.mjs';
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import { isObjectLike } from '../jsutils/isObjectLike.mjs';
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import { GraphQLError } from '../error/GraphQLError.mjs';
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import { Kind } from '../language/kinds.mjs';
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import { print } from '../language/printer.mjs';
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import { GraphQLScalarType } from './definition.mjs';
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/**
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* Maximum possible Int value as per GraphQL Spec (32-bit signed integer).
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* n.b. This differs from JavaScript's numbers that are IEEE 754 doubles safe up-to 2^53 - 1
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* */
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export const GRAPHQL_MAX_INT = 2147483647;
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/**
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* Minimum possible Int value as per GraphQL Spec (32-bit signed integer).
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* n.b. This differs from JavaScript's numbers that are IEEE 754 doubles safe starting at -(2^53 - 1)
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* */
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export const GRAPHQL_MIN_INT = -2147483648;
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export const GraphQLInt = new GraphQLScalarType({
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name: 'Int',
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description:
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'The `Int` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1.',
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serialize(outputValue) {
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const coercedValue = serializeObject(outputValue);
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if (typeof coercedValue === 'boolean') {
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return coercedValue ? 1 : 0;
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}
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let num = coercedValue;
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if (typeof coercedValue === 'string' && coercedValue !== '') {
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num = Number(coercedValue);
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}
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if (typeof num !== 'number' || !Number.isInteger(num)) {
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throw new GraphQLError(
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`Int cannot represent non-integer value: ${inspect(coercedValue)}`,
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);
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}
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if (num > GRAPHQL_MAX_INT || num < GRAPHQL_MIN_INT) {
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throw new GraphQLError(
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'Int cannot represent non 32-bit signed integer value: ' +
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inspect(coercedValue),
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);
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}
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return num;
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},
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parseValue(inputValue) {
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if (typeof inputValue !== 'number' || !Number.isInteger(inputValue)) {
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throw new GraphQLError(
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`Int cannot represent non-integer value: ${inspect(inputValue)}`,
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);
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}
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if (inputValue > GRAPHQL_MAX_INT || inputValue < GRAPHQL_MIN_INT) {
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throw new GraphQLError(
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`Int cannot represent non 32-bit signed integer value: ${inputValue}`,
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);
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}
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return inputValue;
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},
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parseLiteral(valueNode) {
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if (valueNode.kind !== Kind.INT) {
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throw new GraphQLError(
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`Int cannot represent non-integer value: ${print(valueNode)}`,
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{
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nodes: valueNode,
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},
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);
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}
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const num = parseInt(valueNode.value, 10);
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if (num > GRAPHQL_MAX_INT || num < GRAPHQL_MIN_INT) {
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throw new GraphQLError(
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`Int cannot represent non 32-bit signed integer value: ${valueNode.value}`,
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{
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nodes: valueNode,
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},
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);
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}
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return num;
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},
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});
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export const GraphQLFloat = new GraphQLScalarType({
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name: 'Float',
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description:
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'The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](https://en.wikipedia.org/wiki/IEEE_floating_point).',
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serialize(outputValue) {
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const coercedValue = serializeObject(outputValue);
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if (typeof coercedValue === 'boolean') {
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return coercedValue ? 1 : 0;
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}
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let num = coercedValue;
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if (typeof coercedValue === 'string' && coercedValue !== '') {
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num = Number(coercedValue);
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}
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if (typeof num !== 'number' || !Number.isFinite(num)) {
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throw new GraphQLError(
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`Float cannot represent non numeric value: ${inspect(coercedValue)}`,
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);
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}
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return num;
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},
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parseValue(inputValue) {
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if (typeof inputValue !== 'number' || !Number.isFinite(inputValue)) {
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throw new GraphQLError(
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`Float cannot represent non numeric value: ${inspect(inputValue)}`,
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);
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}
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return inputValue;
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},
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parseLiteral(valueNode) {
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if (valueNode.kind !== Kind.FLOAT && valueNode.kind !== Kind.INT) {
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throw new GraphQLError(
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`Float cannot represent non numeric value: ${print(valueNode)}`,
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valueNode,
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);
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}
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return parseFloat(valueNode.value);
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},
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});
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export const GraphQLString = new GraphQLScalarType({
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name: 'String',
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description:
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'The `String` scalar type represents textual data, represented as UTF-8 character sequences. The String type is most often used by GraphQL to represent free-form human-readable text.',
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serialize(outputValue) {
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const coercedValue = serializeObject(outputValue); // Serialize string, boolean and number values to a string, but do not
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// attempt to coerce object, function, symbol, or other types as strings.
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if (typeof coercedValue === 'string') {
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return coercedValue;
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}
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if (typeof coercedValue === 'boolean') {
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return coercedValue ? 'true' : 'false';
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}
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if (typeof coercedValue === 'number' && Number.isFinite(coercedValue)) {
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return coercedValue.toString();
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}
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throw new GraphQLError(
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`String cannot represent value: ${inspect(outputValue)}`,
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);
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},
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parseValue(inputValue) {
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if (typeof inputValue !== 'string') {
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throw new GraphQLError(
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`String cannot represent a non string value: ${inspect(inputValue)}`,
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);
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}
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return inputValue;
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},
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parseLiteral(valueNode) {
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if (valueNode.kind !== Kind.STRING) {
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throw new GraphQLError(
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`String cannot represent a non string value: ${print(valueNode)}`,
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{
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nodes: valueNode,
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},
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);
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}
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return valueNode.value;
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},
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});
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export const GraphQLBoolean = new GraphQLScalarType({
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name: 'Boolean',
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description: 'The `Boolean` scalar type represents `true` or `false`.',
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serialize(outputValue) {
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const coercedValue = serializeObject(outputValue);
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if (typeof coercedValue === 'boolean') {
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return coercedValue;
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}
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if (Number.isFinite(coercedValue)) {
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return coercedValue !== 0;
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}
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throw new GraphQLError(
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`Boolean cannot represent a non boolean value: ${inspect(coercedValue)}`,
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);
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},
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parseValue(inputValue) {
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if (typeof inputValue !== 'boolean') {
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throw new GraphQLError(
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`Boolean cannot represent a non boolean value: ${inspect(inputValue)}`,
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);
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}
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return inputValue;
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},
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parseLiteral(valueNode) {
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if (valueNode.kind !== Kind.BOOLEAN) {
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throw new GraphQLError(
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`Boolean cannot represent a non boolean value: ${print(valueNode)}`,
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{
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nodes: valueNode,
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},
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);
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}
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return valueNode.value;
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},
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});
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export const GraphQLID = new GraphQLScalarType({
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name: 'ID',
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description:
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'The `ID` scalar type represents a unique identifier, often used to refetch an object or as key for a cache. The ID type appears in a JSON response as a String; however, it is not intended to be human-readable. When expected as an input type, any string (such as `"4"`) or integer (such as `4`) input value will be accepted as an ID.',
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serialize(outputValue) {
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const coercedValue = serializeObject(outputValue);
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if (typeof coercedValue === 'string') {
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return coercedValue;
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}
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if (Number.isInteger(coercedValue)) {
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return String(coercedValue);
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}
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throw new GraphQLError(
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`ID cannot represent value: ${inspect(outputValue)}`,
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);
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},
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parseValue(inputValue) {
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if (typeof inputValue === 'string') {
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return inputValue;
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}
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if (typeof inputValue === 'number' && Number.isInteger(inputValue)) {
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return inputValue.toString();
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}
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throw new GraphQLError(`ID cannot represent value: ${inspect(inputValue)}`);
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},
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parseLiteral(valueNode) {
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if (valueNode.kind !== Kind.STRING && valueNode.kind !== Kind.INT) {
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throw new GraphQLError(
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'ID cannot represent a non-string and non-integer value: ' +
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print(valueNode),
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{
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nodes: valueNode,
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},
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);
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}
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return valueNode.value;
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},
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});
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export const specifiedScalarTypes = Object.freeze([
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GraphQLString,
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GraphQLInt,
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GraphQLFloat,
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GraphQLBoolean,
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GraphQLID,
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]);
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export function isSpecifiedScalarType(type) {
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return specifiedScalarTypes.some(({ name }) => type.name === name);
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} // Support serializing objects with custom valueOf() or toJSON() functions -
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// a common way to represent a complex value which can be represented as
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// a string (ex: MongoDB id objects).
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function serializeObject(outputValue) {
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if (isObjectLike(outputValue)) {
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if (typeof outputValue.valueOf === 'function') {
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const valueOfResult = outputValue.valueOf();
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if (!isObjectLike(valueOfResult)) {
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return valueOfResult;
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}
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}
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if (typeof outputValue.toJSON === 'function') {
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return outputValue.toJSON();
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}
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}
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return outputValue;
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}
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