Added logical or

validators/logic.test.ts

@@ -0,0 +1,27 @@
+import { or } from "./logic.ts";
+import { validate, Validator, isString, isInteger } from "../mod.ts";
+import {
+  assertEquals,
+  assertNotEquals,
+} from "https://deno.land/std@0.53.0/testing/asserts.ts";
+
+Deno.test("or (match)", async () => {
+  const values: [any, Validator[]][] = [
+    ["", [isString, isInteger]],
+    [1, [isString, isInteger]],
+  ];
+  for (const [value, validators] of values) {
+    assertEquals(await validate(value, or(...validators)), []);
+  }
+});
+
+Deno.test("or (no match)", async () => {
+  const values: [any, Validator[]][] = [
+    [true, [isString, isInteger]],
+    [3.1415, [isString, isInteger]],
+    [1, [isString]],
+  ];
+  for (const [value, validators] of values) {
+    assertNotEquals(await validate(value, or(...validators)), []);
+  }
+});

validators/logic.ts

@@ -0,0 +1,18 @@
+import { Validator, Args, Validatable, validate } from "../mod.ts";
+
+export function or(...funcs: Validatable[]): Validator {
+  return {
+    type: "or",
+    check: async (value: any) => {
+      const errors = await Promise.all(funcs.map((x) => validate(value, x)));
+      if (errors.every((x) => x.length > 0)) {
+        return {
+          errors,
+        };
+      }
+    },
+    message: (value: any, args?: Args) => {
+      return "At least one of the rules has to be successful.";
+    },
+  };
+}