Initial commit

server/node_modules/graphql/validation/rules/VariablesInAllowedPosition.mjs

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+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ *  strict
+ */
+import inspect from '../../jsutils/inspect';
+import { GraphQLError } from '../../error/GraphQLError';
+import { Kind } from '../../language/kinds';
+import { isNonNullType } from '../../type/definition';
+import { isTypeSubTypeOf } from '../../utilities/typeComparators';
+import { typeFromAST } from '../../utilities/typeFromAST';
+export function badVarPosMessage(varName, varType, expectedType) {
+  return "Variable \"$".concat(varName, "\" of type \"").concat(varType, "\" used in ") + "position expecting type \"".concat(expectedType, "\".");
+}
+/**
+ * Variables passed to field arguments conform to type
+ */
+
+export function VariablesInAllowedPosition(context) {
+  var varDefMap = Object.create(null);
+  return {
+    OperationDefinition: {
+      enter: function enter() {
+        varDefMap = Object.create(null);
+      },
+      leave: function leave(operation) {
+        var usages = context.getRecursiveVariableUsages(operation);
+        var _iteratorNormalCompletion = true;
+        var _didIteratorError = false;
+        var _iteratorError = undefined;
+
+        try {
+          for (var _iterator = usages[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
+            var _ref2 = _step.value;
+            var node = _ref2.node,
+                type = _ref2.type,
+                defaultValue = _ref2.defaultValue;
+            var varName = node.name.value;
+            var varDef = varDefMap[varName];
+
+            if (varDef && type) {
+              // A var type is allowed if it is the same or more strict (e.g. is
+              // a subtype of) than the expected type. It can be more strict if
+              // the variable type is non-null when the expected type is nullable.
+              // If both are list types, the variable item type can be more strict
+              // than the expected item type (contravariant).
+              var schema = context.getSchema();
+              var varType = typeFromAST(schema, varDef.type);
+
+              if (varType && !allowedVariableUsage(schema, varType, varDef.defaultValue, type, defaultValue)) {
+                context.reportError(new GraphQLError(badVarPosMessage(varName, inspect(varType), inspect(type)), [varDef, node]));
+              }
+            }
+          }
+        } catch (err) {
+          _didIteratorError = true;
+          _iteratorError = err;
+        } finally {
+          try {
+            if (!_iteratorNormalCompletion && _iterator.return != null) {
+              _iterator.return();
+            }
+          } finally {
+            if (_didIteratorError) {
+              throw _iteratorError;
+            }
+          }
+        }
+      }
+    },
+    VariableDefinition: function VariableDefinition(node) {
+      varDefMap[node.variable.name.value] = node;
+    }
+  };
+}
+/**
+ * Returns true if the variable is allowed in the location it was found,
+ * which includes considering if default values exist for either the variable
+ * or the location at which it is located.
+ */
+
+function allowedVariableUsage(schema, varType, varDefaultValue, locationType, locationDefaultValue) {
+  if (isNonNullType(locationType) && !isNonNullType(varType)) {
+    var hasNonNullVariableDefaultValue = varDefaultValue && varDefaultValue.kind !== Kind.NULL;
+    var hasLocationDefaultValue = locationDefaultValue !== undefined;
+
+    if (!hasNonNullVariableDefaultValue && !hasLocationDefaultValue) {
+      return false;
+    }
+
+    var nullableLocationType = locationType.ofType;
+    return isTypeSubTypeOf(schema, varType, nullableLocationType);
+  }
+
+  return isTypeSubTypeOf(schema, varType, locationType);
+}