Config Validator

class ConfigValidator {  constructor(schema) {    this.schema = schema;  }    validate(config) {    const errors = [];    this._validateObject(config, this.schema, '', errors);    return {      valid: errors.length === 0,      errors    };  }    _validateObject(obj, schema, path, errors) {    if (!schema.required) return;        for (const field of schema.required) {      const fieldPath = path ? `${path}.${field}` : field;      if (!(field in obj)) {        errors.push(`Missing required field: ${fieldPath}`);      }    }        for (const [key, value] of Object.entries(obj)) {      const fieldPath = path ? `${path}.${key}` : key;      const fieldSchema = schema.properties?.[key];            if (fieldSchema) {        this._validateValue(value, fieldSchema, fieldPath, errors);      }    }  }    _validateValue(value, schema, path, errors) {    if (schema.type === 'object' && schema.properties) {      this._validateObject(value, schema, path, errors);    } else if (schema.type === 'array' && schema.items) {      if (!Array.isArray(value)) {        errors.push(`${path}: expected array`);      } else {        value.forEach((item, i) => {          this._validateValue(item, schema.items, `${path}[${i}]`, errors);        });      }    } else if (schema.type && typeof value !== schema.type) {      errors.push(`${path}: expected ${schema.type}, got ${typeof value}`);    }  }}module.exports = ConfigValidator;

const ConfigValidator = require('./configValidator');const schema = {"properties": {"name": {"type": "string"}, "port": {"type": "number"}, "debug": {"type": "boolean"}}, "type": "object", "required": ["name", "port"]};const validator = new ConfigValidator(schema);const config = {"name": "myapp", "port": 3000, "debug": true};const result = validator.validate(config);if (result.valid) {  console.log('Config is valid');} else {  console.error('Validation errors:', result.errors);}