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node_modules/graphql/utilities/astFromValue.mjs

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+import { forEach, isCollection } from 'iterall';
+import objectValues from '../polyfills/objectValues';
+import inspect from '../jsutils/inspect';
+import invariant from '../jsutils/invariant';
+import isNullish from '../jsutils/isNullish';
+import isInvalid from '../jsutils/isInvalid';
+import isObjectLike from '../jsutils/isObjectLike';
+import { Kind } from '../language/kinds';
+import { GraphQLID } from '../type/scalars';
+import { isLeafType, isEnumType, isInputObjectType, isListType, isNonNullType } from '../type/definition';
+/**
+ * Produces a GraphQL Value AST given a JavaScript value.
+ *
+ * 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          |
+ * | Mixed         | Enum Value           |
+ * | null          | NullValue            |
+ *
+ */
+
+export function astFromValue(value, type) {
+  if (isNonNullType(type)) {
+    var astValue = astFromValue(value, type.ofType);
+
+    if (astValue && astValue.kind === Kind.NULL) {
+      return null;
+    }
+
+    return astValue;
+  } // only explicit null, not undefined, NaN
+
+
+  if (value === null) {
+    return {
+      kind: Kind.NULL
+    };
+  } // undefined, NaN
+
+
+  if (isInvalid(value)) {
+    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)) {
+    var itemType = type.ofType;
+
+    if (isCollection(value)) {
+      var valuesNodes = [];
+      forEach(value, function (item) {
+        var itemNode = astFromValue(item, itemType);
+
+        if (itemNode) {
+          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;
+    }
+
+    var fieldNodes = [];
+
+    for (var _i2 = 0, _objectValues2 = objectValues(type.getFields()); _i2 < _objectValues2.length; _i2++) {
+      var field = _objectValues2[_i2];
+      var 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
+    };
+  }
+
+  /* istanbul ignore else */
+  if (isLeafType(type)) {
+    // Since value is an internally represented value, it must be serialized
+    // to an externally represented value before converting into an AST.
+    var serialized = type.serialize(value);
+
+    if (isNullish(serialized)) {
+      return null;
+    } // Others serialize based on their corresponding JavaScript scalar types.
+
+
+    if (typeof serialized === 'boolean') {
+      return {
+        kind: Kind.BOOLEAN,
+        value: serialized
+      };
+    } // JavaScript numbers can be Int or Float values.
+
+
+    if (typeof serialized === 'number') {
+      var stringNum = String(serialized);
+      return integerStringRegExp.test(stringNum) ? {
+        kind: Kind.INT,
+        value: stringNum
+      } : {
+        kind: Kind.FLOAT,
+        value: stringNum
+      };
+    }
+
+    if (typeof serialized === 'string') {
+      // Enum types use Enum literals.
+      if (isEnumType(type)) {
+        return {
+          kind: Kind.ENUM,
+          value: serialized
+        };
+      } // ID types can use Int literals.
+
+
+      if (type === GraphQLID && integerStringRegExp.test(serialized)) {
+        return {
+          kind: Kind.INT,
+          value: serialized
+        };
+      }
+
+      return {
+        kind: Kind.STRING,
+        value: serialized
+      };
+    }
+
+    throw new TypeError("Cannot convert value to AST: ".concat(inspect(serialized)));
+  } // Not reachable. All possible input types have been considered.
+
+
+  /* istanbul ignore next */
+  invariant(false, 'Unexpected input type: ' + inspect(type));
+}
+/**
+ * IntValue:
+ *   - NegativeSign? 0
+ *   - NegativeSign? NonZeroDigit ( Digit+ )?
+ */
+
+var integerStringRegExp = /^-?(?:0|[1-9][0-9]*)$/;