@paroicms/server/dist/graphql/complexity-plugin.js

The ParoiCMS server

import { createRequire } from "node:module";
import { GraphQLError } from "graphql";
const require = createRequire(import.meta.url);
const { fieldExtensionsEstimator, getComplexity, simpleEstimator, } = require("graphql-query-complexity");
export function createComplexityPlugin() {
    const maxComplexity = 100;
    const defaultComplexity = 2;
    return {
        requestDidStart(requestContext) {
            return Promise.resolve({
                async didResolveOperation({ request, document }) {
                    if (process.env.NODE_ENV === "development" &&
                        request.operationName === "IntrospectionQuery") {
                        return;
                    }
                    const complexity = getComplexity({
                        schema: requestContext.schema,
                        operationName: request.operationName,
                        query: document,
                        variables: request.variables,
                        estimators: [fieldExtensionsEstimator(), simpleEstimator({ defaultComplexity })],
                    });
                    if (complexity > maxComplexity) {
                        throw new GraphQLError(`Query is too complex: ${complexity}. Maximum allowed complexity: ${maxComplexity}`);
                    }
                },
            });
        },
    };
}
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