make formateDate

src/formatDate.js

@@ -8,7 +8,65 @@
  * @returns {string}
  */
 function formatDate(date, fromFormat, toFormat) {
-  // write code here
+  const result = [];
+  let year = '';
+  let month = '';
+  let day = '';
+  const spliter = fromFormat[fromFormat.length - 1];
+  const joiner = toFormat[toFormat.length - 1];
+  const numbers = date.split(spliter);
+
+  for (let i = 0; i < fromFormat.length; i++) {
+    switch (fromFormat[i]) {
+      case 'YYYY':
+        year = numbers[i];
+        break;
+
+      case 'YY':
+        year = numbers[i];
+        break;
+
+      case 'MM':
+        month = numbers[i];
+        break;
+
+      case 'DD':
+        day = numbers[i];
+        break;
+    }
+  }
+
+  for (const type of toFormat) {
+    switch (type) {
+      case 'YYYY':
+        if (type.length > year.length) {
+          if (year < 30) {
+            year = '20' + year;
+          } else {
+            year = '19' + year;
+          }
+        }
+        result.push(year);
+        break;
+
+      case 'YY':
+        if (type.length < year.length) {
+          year = year.slice(2);
+        }
+        result.push(year);
+        break;
+
+      case 'MM':
+        result.push(month);
+        break;
+
+      case 'DD':
+        result.push(day);
+        break;
+    }
+  }
+
+  return result.join(joiner);
 }
 
 module.exports = formatDate;