| 1 | import { Kind } from 'graphql';
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| 2 | /**
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| 3 | * Produces a GraphQL Value AST given a JavaScript object.
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| 4 | * Function will match JavaScript/JSON values to GraphQL AST schema format
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| 5 | * by using the following mapping.
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| 6 | *
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| 7 | * | JSON Value | GraphQL Value |
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| 8 | * | ------------- | -------------------- |
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| 9 | * | Object | Input Object |
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| 10 | * | Array | List |
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| 11 | * | Boolean | Boolean |
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| 12 | * | String | String |
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| 13 | * | Number | Int / Float |
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| 14 | * | null | NullValue |
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| 15 | *
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| 16 | */
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| 17 | export function astFromValueUntyped(value) {
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| 18 | // only explicit null, not undefined, NaN
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| 19 | if (value === null) {
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| 20 | return { kind: Kind.NULL };
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| 21 | }
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| 22 | // undefined
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| 23 | if (value === undefined) {
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| 24 | return null;
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| 25 | }
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| 26 | // Convert JavaScript array to GraphQL list. If the GraphQLType is a list, but
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| 27 | // the value is not an array, convert the value using the list's item type.
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| 28 | if (Array.isArray(value)) {
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| 29 | const valuesNodes = [];
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| 30 | for (const item of value) {
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| 31 | const itemNode = astFromValueUntyped(item);
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| 32 | if (itemNode != null) {
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| 33 | valuesNodes.push(itemNode);
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| 34 | }
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| 35 | }
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| 36 | return { kind: Kind.LIST, values: valuesNodes };
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| 37 | }
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| 38 | if (typeof value === 'object') {
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| 39 | const fieldNodes = [];
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| 40 | for (const fieldName in value) {
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| 41 | const fieldValue = value[fieldName];
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| 42 | const ast = astFromValueUntyped(fieldValue);
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| 43 | if (ast) {
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| 44 | fieldNodes.push({
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| 45 | kind: Kind.OBJECT_FIELD,
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| 46 | name: { kind: Kind.NAME, value: fieldName },
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| 47 | value: ast,
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| 48 | });
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| 49 | }
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| 50 | }
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| 51 | return { kind: Kind.OBJECT, fields: fieldNodes };
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| 52 | }
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| 53 | // Others serialize based on their corresponding JavaScript scalar types.
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| 54 | if (typeof value === 'boolean') {
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| 55 | return { kind: Kind.BOOLEAN, value };
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| 56 | }
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| 57 | // JavaScript numbers can be Int or Float values.
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| 58 | if (typeof value === 'number' && isFinite(value)) {
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| 59 | const stringNum = String(value);
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| 60 | return integerStringRegExp.test(stringNum)
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| 61 | ? { kind: Kind.INT, value: stringNum }
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| 62 | : { kind: Kind.FLOAT, value: stringNum };
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| 63 | }
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| 64 | if (typeof value === 'string') {
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| 65 | return { kind: Kind.STRING, value };
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| 66 | }
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| 67 | throw new TypeError(`Cannot convert value to AST: ${value}.`);
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| 68 | }
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| 69 | /**
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| 70 | * IntValue:
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| 71 | * - NegativeSign? 0
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| 72 | * - NegativeSign? NonZeroDigit ( Digit+ )?
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| 73 | */
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| 74 | const integerStringRegExp = /^-?(?:0|[1-9][0-9]*)$/;
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