Support BigInt values

.changeset/wicked-apples-remain.md

@@ -0,0 +1,5 @@
+---
+'@graphql-tools/utils': patch
+---
+
+Support BigInt values

packages/utils/src/astFromValue.ts

@@ -0,0 +1,124 @@
+import {
+  GraphQLInputType,
+  Kind,
+  ObjectFieldNode,
+  ValueNode,
+  isEnumType,
+  isInputObjectType,
+  isLeafType,
+  isListType,
+  isNonNullType,
+} from 'graphql';
+import { isIterableObject, isObjectLike } from './jsutils.js';
+import { inspect } from './inspect.js';
+import { Maybe } from './types.js';
+import { astFromValueUntyped } from './astFromValueUntyped.js';
+
+/**
+ * Produces a GraphQL Value AST given a JavaScript object.
+ * Function will match JavaScript/JSON values to GraphQL AST schema format
+ * by using suggested GraphQLInputType. For example:
+ *
+ *     astFromValue("value", GraphQLString)
+ *
+ * A GraphQL type must be provided, which will be used to interpret different
+ * JavaScript values.
+ *
+ * | JSON Value    | GraphQL Value        |
+ * | ------------- | -------------------- |
+ * | Object        | Input Object         |
+ * | Array         | List                 |
+ * | Boolean       | Boolean              |
+ * | String        | String / Enum Value  |
+ * | Number        | Int / Float          |
+ * | BigInt        | Int                  |
+ * | Unknown       | Enum Value           |
+ * | null          | NullValue            |
+ *
+ */
+export function astFromValue(value: unknown, type: GraphQLInputType): Maybe<ValueNode> {
+  if (isNonNullType(type)) {
+    const astValue = astFromValue(value, type.ofType);
+    if (astValue?.kind === Kind.NULL) {
+      return null;
+    }
+    return astValue;
+  }
+
+  // only explicit null, not undefined, NaN
+  if (value === null) {
+    return { kind: Kind.NULL };
+  }
+
+  // undefined
+  if (value === undefined) {
+    return null;
+  }
+
+  // Convert JavaScript array to GraphQL list. If the GraphQLType is a list, but
+  // the value is not an array, convert the value using the list's item type.
+  if (isListType(type)) {
+    const itemType = type.ofType;
+    if (isIterableObject(value)) {
+      const valuesNodes = [];
+      for (const item of value) {
+        const itemNode = astFromValue(item, itemType);
+        if (itemNode != null) {
+          valuesNodes.push(itemNode);
+        }
+      }
+      return { kind: Kind.LIST, values: valuesNodes };
+    }
+    return astFromValue(value, itemType);
+  }
+
+  // Populate the fields of the input object by creating ASTs from each value
+  // in the JavaScript object according to the fields in the input type.
+  if (isInputObjectType(type)) {
+    if (!isObjectLike(value)) {
+      return null;
+    }
+    const fieldNodes: Array<ObjectFieldNode> = [];
+    for (const field of Object.values(type.getFields())) {
+      const fieldValue = astFromValue(value[field.name], field.type);
+      if (fieldValue) {
+        fieldNodes.push({
+          kind: Kind.OBJECT_FIELD,
+          name: { kind: Kind.NAME, value: field.name },
+          value: fieldValue,
+        });
+      }
+    }
+    return { kind: Kind.OBJECT, fields: fieldNodes };
+  }
+
+  if (isLeafType(type)) {
+    // Since value is an internally represented value, it must be serialized
+    // to an externally represented value before converting into an AST.
+    const serialized = type.serialize(value);
+    if (serialized == null) {
+      return null;
+    }
+
+    if (isEnumType(type)) {
+      return { kind: Kind.ENUM, value: serialized as string };
+    }
+
+    // ID types can use Int literals.
+    if (type.name === 'ID' && typeof serialized === 'string' && integerStringRegExp.test(serialized)) {
+      return { kind: Kind.INT, value: serialized };
+    }
+
+    return astFromValueUntyped(serialized);
+  }
+  /* c8 ignore next 3 */
+  // Not reachable, all possible types have been considered.
+  console.assert(false, 'Unexpected input type: ' + inspect(type));
+}
+
+/**
+ * IntValue:
+ *   - NegativeSign? 0
+ *   - NegativeSign? NonZeroDigit ( Digit+ )?
+ */
+const integerStringRegExp = /^-?(?:0|[1-9][0-9]*)$/;

packages/utils/src/astFromValueUntyped.ts

@@ -12,6 +12,7 @@ import { Kind, ObjectFieldNode, ValueNode } from 'graphql';
  * | Boolean       | Boolean              |
  * | String        | String               |
  * | Number        | Int / Float          |
+ * | BigInt        | Int                  |
  * | null          | NullValue            |
  *
  */
@@ -60,6 +61,10 @@ export function astFromValueUntyped(value: any): ValueNode | null {
     return { kind: Kind.BOOLEAN, value };
   }
 
+  if (typeof value === 'bigint') {
+    return { kind: Kind.INT, value: String(value) };
+  }
+
   // JavaScript numbers can be Int or Float values.
   if (typeof value === 'number' && isFinite(value)) {
     const stringNum = String(value);

packages/utils/src/print-schema-with-directives.ts

@@ -14,7 +14,6 @@ import {
   isSpecifiedDirective,
   GraphQLDirective,
   DirectiveDefinitionNode,
-  astFromValue,
   ArgumentNode,
   SchemaDefinitionNode,
   OperationTypeDefinitionNode,
@@ -55,6 +54,7 @@ import { getDirectivesInExtensions } from './get-directives.js';
 import { astFromValueUntyped } from './astFromValueUntyped.js';
 import { isSome } from './helpers.js';
 import { getRootTypeMap } from './rootTypes.js';
+import { astFromValue } from './astFromValue.js';
 
 export function getDocumentNodeFromSchema(
   schema: GraphQLSchema,