More refactoring

UI/InputElement/Validators/IntValidator.ts

@@ -0,0 +1,29 @@
+import { Translation } from "../../i18n/Translation"
+import Translations from "../../i18n/Translations"
+import { Validator } from "../ValidatedTextField"
+
+export default class IntValidator extends Validator {
+    constructor(name?: string, explanation?: string) {
+        super(
+            name ?? "int",
+            explanation ?? "A whole number, either positive, negative or zero",
+            "numeric"
+        )
+    }
+
+    isValid(str): boolean {
+        str = "" + str
+        return str !== undefined && str.indexOf(".") < 0 && !isNaN(Number(str))
+    }
+
+    getFeedback(s: string): Translation {
+        const n = Number(s)
+        if (isNaN(n)) {
+            return Translations.t.validation.nat.notANumber
+        }
+        if (Math.floor(n) !== n) {
+            return Translations.t.validation.nat.mustBeWhole
+        }
+        return undefined
+    }
+}