extract Unique Values From Collection by property using sets and funtion or instruction per property

extractUniqueValuesFromCollection.js

/**
 * @param collection {[]}
 * @param properties {String[]}
 * @param options {{return_as_arrays: (Boolean),  : {extract_instruction: (String), extract_function: (Function)}}} 
 * @example: 
 * transport_items_data, 
 * ['transport_item_type_id', 'status_ids_for_filtering', 'status_ids'],
 * {return_as_arrays: true, status_ids_for_filtering: {extract_instruction: 'spread'}, status_ids: {extract_instruction: 'spread'}}
 * @returns {Object}
 */
_.extractUniqueValuesFromCollection = (collection, properties, options = {}) => {
	const sets_repo = {};
	properties.forEach(property => sets_repo[property] = new Set());
	collection.forEach(item => {
		properties.forEach(property => {
				if (options[property]){
					if (options[property].extract_instruction === 'spread'){
						sets_repo[property].add(...item[property])
					} else {
						const extract_function = options[property].extract_function;
						sets_repo[property].add(extract_function(item[property]));
					}
				} else {
					sets_repo[property].add(item[property])
				}
			}
		);
	});
	const results = {};
	if (options.return_as_arrays) {
		Object.keys(sets_repo).forEach(key =>
			results[key] = Array.from(sets_repo[key])
		);
	}
	return options.return_as_arrays ?
		results :
		sets_repo;
}