Create a parquet columns and Glue table columns from a common object

generateCommonColumns.ts

import { Schema } as GlueSchema from '@aws-cdk/aws-glue';

/**
 * Create a parquet columns and Glue table columns from a common object
 * @param attributes { name: type }
 * @returns {
 * parquetSchema: { name: { type: 'type' }, ...},
 * glueSchema: [
 *  { name: 'name', type: 'UTF8' },
 *  ...
 * ]
 * }
 */
export function generateCommonColumns(attributes: Record<string, 'string'|'int'|'bigInt'|'boolean'|'date'>) {
  const mapper = {
    parquet: {
      string: { type: 'UTF8', optional: true  },
      int: { type: 'INT32', optional: true  },
      bigInt: { type: 'INT64', optional: true  },
      boolean: { type: 'BOOLEAN', optional: true },
      date: { type: 'TIMESTAMP_MILLIS', optional: true  },

    },
    glueColumns: {
      string: GlueSchema.STRING,
      int: GlueSchema.INTEGER,
      bigInt: GlueSchema.BIG_INT,
      boolean:GlueSchema.BOOLEAN,
      date: GlueSchema.TIMESTAMP
    },
  }

  const
    parquetColumns = {},
    glueColumns:any = [];
  Object.keys(attributes).forEach((attrName) => {
    if (mapper.glueColumns.hasOwnProperty(attributes[attrName])) {
      Object.assign(parquetColumns,{ [attrName]: mapper.parquet[attributes[attrName]] });
       glueColumns.push({ "name": attrName, type: mapper.glueColumns[attributes[attrName]] })
    } else throw new Error(`${attrName} is not a valid attribute type`);
  });
  return {parquetColumns,glueColumns}
}