flow like the river

BACK_BACK/node_modules/graphql/utilities/astFromValue.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.astFromValue = astFromValue;
+
+var _isFinite = _interopRequireDefault(require("../polyfills/isFinite.js"));
+
+var _objectValues3 = _interopRequireDefault(require("../polyfills/objectValues.js"));
+
+var _inspect = _interopRequireDefault(require("../jsutils/inspect.js"));
+
+var _invariant = _interopRequireDefault(require("../jsutils/invariant.js"));
+
+var _isObjectLike = _interopRequireDefault(require("../jsutils/isObjectLike.js"));
+
+var _safeArrayFrom = _interopRequireDefault(require("../jsutils/safeArrayFrom.js"));
+
+var _kinds = require("../language/kinds.js");
+
+var _scalars = require("../type/scalars.js");
+
+var _definition = require("../type/definition.js");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * 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          |
+ * | Mixed         | Enum Value           |
+ * | null          | NullValue            |
+ *
+ */
+function astFromValue(value, type) {
+  if ((0, _definition.isNonNullType)(type)) {
+    var astValue = astFromValue(value, type.ofType);
+
+    if ((astValue === null || astValue === void 0 ? void 0 : astValue.kind) === _kinds.Kind.NULL) {
+      return null;
+    }
+
+    return astValue;
+  } // only explicit null, not undefined, NaN
+
+
+  if (value === null) {
+    return {
+      kind: _kinds.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 ((0, _definition.isListType)(type)) {
+    var itemType = type.ofType;
+    var items = (0, _safeArrayFrom.default)(value);
+
+    if (items != null) {
+      var valuesNodes = [];
+
+      for (var _i2 = 0; _i2 < items.length; _i2++) {
+        var item = items[_i2];
+        var itemNode = astFromValue(item, itemType);
+
+        if (itemNode != null) {
+          valuesNodes.push(itemNode);
+        }
+      }
+
+      return {
+        kind: _kinds.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 ((0, _definition.isInputObjectType)(type)) {
+    if (!(0, _isObjectLike.default)(value)) {
+      return null;
+    }
+
+    var fieldNodes = [];
+
+    for (var _i4 = 0, _objectValues2 = (0, _objectValues3.default)(type.getFields()); _i4 < _objectValues2.length; _i4++) {
+      var field = _objectValues2[_i4];
+      var fieldValue = astFromValue(value[field.name], field.type);
+
+      if (fieldValue) {
+        fieldNodes.push({
+          kind: _kinds.Kind.OBJECT_FIELD,
+          name: {
+            kind: _kinds.Kind.NAME,
+            value: field.name
+          },
+          value: fieldValue
+        });
+      }
+    }
+
+    return {
+      kind: _kinds.Kind.OBJECT,
+      fields: fieldNodes
+    };
+  } // istanbul ignore else (See: 'https://github.com/graphql/graphql-js/issues/2618')
+
+
+  if ((0, _definition.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 (serialized == null) {
+      return null;
+    } // Others serialize based on their corresponding JavaScript scalar types.
+
+
+    if (typeof serialized === 'boolean') {
+      return {
+        kind: _kinds.Kind.BOOLEAN,
+        value: serialized
+      };
+    } // JavaScript numbers can be Int or Float values.
+
+
+    if (typeof serialized === 'number' && (0, _isFinite.default)(serialized)) {
+      var stringNum = String(serialized);
+      return integerStringRegExp.test(stringNum) ? {
+        kind: _kinds.Kind.INT,
+        value: stringNum
+      } : {
+        kind: _kinds.Kind.FLOAT,
+        value: stringNum
+      };
+    }
+
+    if (typeof serialized === 'string') {
+      // Enum types use Enum literals.
+      if ((0, _definition.isEnumType)(type)) {
+        return {
+          kind: _kinds.Kind.ENUM,
+          value: serialized
+        };
+      } // ID types can use Int literals.
+
+
+      if (type === _scalars.GraphQLID && integerStringRegExp.test(serialized)) {
+        return {
+          kind: _kinds.Kind.INT,
+          value: serialized
+        };
+      }
+
+      return {
+        kind: _kinds.Kind.STRING,
+        value: serialized
+      };
+    }
+
+    throw new TypeError("Cannot convert value to AST: ".concat((0, _inspect.default)(serialized), "."));
+  } // istanbul ignore next (Not reachable. All possible input types have been considered)
+
+
+  false || (0, _invariant.default)(0, 'Unexpected input type: ' + (0, _inspect.default)(type));
+}
+/**
+ * IntValue:
+ *   - NegativeSign? 0
+ *   - NegativeSign? NonZeroDigit ( Digit+ )?
+ */
+
+
+var integerStringRegExp = /^-?(?:0|[1-9][0-9]*)$/;