🌎 🌍 🌏 initial commit

src/core.js

@@ -0,0 +1,26 @@
+const isJsons = (array) => array.every(row => (typeof row === 'object' && !(row instanceof Array)))
+const isArrays = (array) => array.every(row => Array.isArray(row))
+
+const jsonsHeaders = (array) => Array.from(
+ array.map(json => Object.keys(json))
+ .reduce((a, b) => new Set([...a, ...b]), [])
+);
+const jsons2arrays = (jsons, headers) => {
+ headers = headers || jsonsHeaders(jsons);
+ return [headers, ...array.map((object) =>
+  headers.map((header) =>
+   object[header] ? object[header] : ''))]
+};
+
+const joiner = (data) => data.map((row, index) => row.join(',')).join(`\n`);
+
+const arrays2csv = (data, headers) => joiner(headers ? [headers, ...data] : data);
+const jsons2csv = (data, headers) =>  joiner(jsons2arrays(data, headers))
+const toCSV = (data, headers) => {
+  if(isJsons(data)) return jsons2csv(data, headers);
+  if(isArrays(data)) return jsons2csv(data, headers);
+  throw new TypeError(`Data should be an array of arrays OR array of objects `);
+};
+export const buildURI = (data, headers) => encodeURI(
+`data:text/csv;charset=utf-8,${toCSV(data, headers)}`
+);