@omnigraph/json-schema/esm/getJSONSchemaStringFormatScalarMap.js

This package generates GraphQL Schema from JSON Schema and sample JSON request and responses. You can define your root field endpoints like below in your GraphQL Config for example;

import Ajv from 'ajv';
import addFormats from 'ajv-formats';
import { GraphQLScalarType, Kind } from 'graphql';
import { pascalCase } from 'pascal-case';
const JSONSchemaStringFormats = [
    'date',
    'hostname',
    'regex',
    'json-pointer',
    'relative-json-pointer',
    'uri-reference',
    'uri-template',
];
export function getJSONSchemaStringFormatScalarMap() {
    const ajv = new Ajv({
        strict: false,
    });
    addFormats(ajv);
    const map = new Map();
    for (const format of JSONSchemaStringFormats) {
        const schema = {
            type: 'string',
            format,
        };
        let validate;
        try {
            validate = ajv.compile(schema);
        }
        catch (e) {
            validate = (value) => ajv.validate(schema, value);
        }
        const coerceString = (value) => {
            if (validate(value)) {
                return value;
            }
            throw new Error(`Expected ${format} but got: ${value}`);
        };
        const scalar = new GraphQLScalarType({
            name: pascalCase(format),
            description: `Represents ${format} values`,
            serialize: coerceString,
            parseValue: coerceString,
            parseLiteral: ast => {
                if (ast.kind === Kind.STRING) {
                    return coerceString(ast.value);
                }
                throw new Error(`Expected string in ${format} format but got: ${ast.value}`);
            },
            extensions: {
                codegenScalarType: 'string',
            },
        });
        map.set(format, scalar);
    }
    return map;
}