/* 
	Modify data returned by the database connector scripts. s
*/
class DBParser {
	constructor(DATA = {}, MAPPINGS = {}) {
		this.data = DATA;
		this.mappings = MAPPINGS;
	}

	/*
		Modify the data for output. 

		@return {Object} cleaned data
	*/
	format () {
		let ENTRIES;
		/* 
			Map certain new keys to their orignal counterparts. 
		*/
		function mapKeys (ORIGINAL = {}, MAPPINGS) {
			let RESULT = {};
			
			Object.entries(MAPPINGS).forEach(([NEW, OLD]) => {
				RESULT[NEW] = (ORIGINAL[OLD] != null ? (typeof ORIGINAL[OLD]).includes(`str`) : false) ? ORIGINAL[OLD].trim() : ORIGINAL[OLD];
			});
			
			return RESULT;
		}
		
		if (this.data instanceof Array) {
			ENTRIES = [];
	
			(this.data.length) ? this.data.forEach((SELECTED) => {
				if (SELECTED) {
					let CLEANED = mapKeys(SELECTED, this.mappings);
					(Object.keys(CLEANED).length) ? ENTRIES.push(CLEANED) : false;
				};
			}) : false;
		} else if (this.data && this.data instanceof Object) {
			ENTRIES = mapKeys(this.data, this.mappings);
		};

		this.cleaned = ENTRIES;
		return (this.cleaned);
	}

}

module.exports = DBParser;