improved toCSV

src/csv.ts

@@ -1,4 +1,5 @@
-import {dotNotation, flattenObj} from './objects.ts';
+import {ASet} from './aset.ts';
+import {dotNotation, flattenObj, JSONAttemptParse, JSONSanitize} from './objects.ts';
 
 /**
  * Convert an object to a CSV string
@@ -7,20 +8,13 @@ import {dotNotation, flattenObj} from './objects.ts';
  * @param {boolean} flatten Should nested object be flattened or treated as values
  * @return {string} CSV string
  */
-export function csv(target: any[], flatten=true) {
-	const headers = target.reduce((acc, row) => {
-		Object.keys(flatten ? flattenObj(row) : row)
-			.forEach(key => { if(!acc.includes(key)) acc.push(key); });
-		return acc;
-	}, []);
+export function toCsv(target: any[], flatten=true) {
+	const headers = new ASet(target.reduce((acc, row) => [...acc, ...Object.keys(flatten ? flattenObj(row) : row)], []));
 	return [
 		headers.join(','),
 		...target.map(row => headers.map((h: string) => {
 			const value = dotNotation<any>(row, h);
-			const type = typeof value;
-			if(type == 'string' && value.includes(',')) return `"${value}"`;
-			if(type == 'object') return `"${JSON.stringify(value)}"`;
-			return value;
+			return (typeof value == 'object' && value != null) ? '"' + JSONSanitize(value).replaceAll('"', '""') + '"' : value;
 		}).join(','))
 	].join('\n');
 }