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