graphql/type/assertName.mjs

A Query Language and Runtime which can target any service.

import { GraphQLError } from "../error/GraphQLError.mjs";
import { isNameContinue, isNameStart } from "../language/characterClasses.mjs";
export function assertName(name) {
    if (name.length === 0) {
        throw new GraphQLError('Expected name to be a non-empty string.');
    }
    for (let i = 1; i < name.length; ++i) {
        if (!isNameContinue(name.charCodeAt(i))) {
            throw new GraphQLError(`Names must only contain [_a-zA-Z0-9] but "${name}" does not.`);
        }
    }
    if (!isNameStart(name.charCodeAt(0))) {
        throw new GraphQLError(`Names must start with [_a-zA-Z] but "${name}" does not.`);
    }
    return name;
}
export function assertEnumValueName(name) {
    if (name === 'true' || name === 'false' || name === 'null') {
        throw new GraphQLError(`Enum values cannot be named: ${name}`);
    }
    return assertName(name);
}
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