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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.assertValidName = assertValidName;
exports.isValidNameError = isValidNameError;
var _devAssert = _interopRequireDefault(require("../jsutils/devAssert.js"));
var _GraphQLError = require("../error/GraphQLError.js");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var NAME_RX = /^[_a-zA-Z][_a-zA-Z0-9]*$/;
/**
* Upholds the spec rules about naming.
*/
function assertValidName(name) {
var error = isValidNameError(name);
if (error) {
throw error;
}
return name;
}
/**
* Returns an Error if a name is invalid.
*/
function isValidNameError(name) {
typeof name === 'string' || (0, _devAssert.default)(0, 'Expected name to be a string.');
if (name.length > 1 && name[0] === '_' && name[1] === '_') {
return new _GraphQLError.GraphQLError("Name \"".concat(name, "\" must not begin with \"__\", which is reserved by GraphQL introspection."));
}
if (!NAME_RX.test(name)) {
return new _GraphQLError.GraphQLError("Names must match /^[_a-zA-Z][_a-zA-Z0-9]*$/ but \"".concat(name, "\" does not."));
}
}
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