More refactoring

UI/InputElement/Validators/DateValidator.ts

@@ -0,0 +1,23 @@
+import { Validator } from "../ValidatedTextField"
+
+export default class DateValidator extends Validator {
+    constructor() {
+        super("date", "A date with date picker")
+    }
+
+    isValid(str: string): boolean {
+        return !isNaN(new Date(str).getTime())
+    }
+
+    reformat(str: string) {
+        const d = new Date(str)
+        let month = "" + (d.getMonth() + 1)
+        let day = "" + d.getDate()
+        const year = d.getFullYear()
+
+        if (month.length < 2) month = "0" + month
+        if (day.length < 2) day = "0" + day
+
+        return [year, month, day].join("-")
+    }
+}