feat: cli tool

cli.js

@@ -0,0 +1,33 @@
+#!/usr/bin/env node
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const index_1 = require("./index");
+const arg = process.argv[2];
+if (!arg) {
+  console.log("Usage: toroman <number|roman>");
+  process.exit(1);
+}
+const input = arg.toUpperCase();
+// try {
+//     console.log(input);
+//     console.log(Number(input));
+//     const isValidRoman = isRoman(input);
+//     console.log(fromRoman(input));
+//     console.log(isValidRoman);
+//     if (isValidRoman === true) {
+//         console.log(`${input} is a valid Roman numeral.`);
+//     }
+// } catch (error) {
+//     console.error("Error: ", error);
+//     process.exit(1);
+// }
+if ((0, index_1.isRoman)(input) === true) {
+  console.log((0, index_1.fromRoman)(input));
+} else {
+  const num = Number(arg);
+  if (isNaN(num)) {
+    console.error("Invalid input");
+    process.exit(1);
+  }
+  console.log((0, index_1.toRoman)(num));
+}

index.js

@@ -33,8 +33,8 @@ function isRoman(value) {
   if (!value) {
     return new Error("Roman numeral cannot be empty");
   }
-  // Input must be a string
-  if (typeof value != "string") {
+  // Input must be a string and not be a number
+  if (typeof value !== "string" || Number(value)) {
     return new Error("Roman numeral must be of type string");
   }
   value = value.toUpperCase();

package.json

@@ -35,5 +35,8 @@
   },
   "lint-staged": {
     "*.{js,css,md}": "prettier --write"
+  },
+  "bin": {
+    "toroman": "./cli.js"
   }
 }

src/cli.ts

@@ -0,0 +1,21 @@
+#!/usr/bin/env node
+import { toRoman, fromRoman, isRoman } from "./index";
+
+const arg = process.argv[2];
+
+if (!arg) {
+    console.log("Usage: toroman <number|roman>");
+    process.exit(1);
+}
+
+const input = arg.toUpperCase();
+if (isRoman(input) === true) {
+    console.log(fromRoman(input));
+} else {
+    const num = Number(arg);
+    if (isNaN(num)) {
+        console.error("Invalid input");
+        process.exit(1);
+    }
+    console.log(toRoman(num));
+}

src/index.ts

@@ -28,8 +28,8 @@ export function isRoman(value: string): true | Error {
         return new Error("Roman numeral cannot be empty");
     }
 
-    // Input must be a string
-    if (typeof value != "string") {
+    // Input must be a string and not be a number
+    if (typeof value !== "string" || Number(value)) {
         return new Error("Roman numeral must be of type string");
     }