feat: remove casting in favor of runtime checking

src/constants.ts

@@ -3,7 +3,11 @@ export const commands = {
   LOGOUT: 'logout',
 } as const
 
-export type RegionCode = 'eu' | 'us' | 'cn' | 'ca' | 'ap'
+export interface ReadonlyArray<T> {
+  includes: (searchElement: any, fromIndex?: number) => searchElement is T
+}
+export const regionCodes = ['eu', 'us', 'cn', 'ca', 'ap'] as const
+export type RegionCode = typeof regionCodes[number]
 
 export const regions: Record<Uppercase<RegionCode>, RegionCode> = {
   EU: 'eu',

src/creds.ts

@@ -2,12 +2,12 @@ import { access, readFile, writeFile } from 'node:fs/promises'
 import { join } from 'node:path'
 import { FileSystemError, handleFileSystemError, konsola } from './utils'
 import chalk from 'chalk'
-import type { RegionCode } from './constants'
+import { regionCodes } from './constants'
 
 export interface NetrcMachine {
   login: string
   password: string
-  region: RegionCode
+  region: string
 }
 
 export const getNetrcFilePath = () => {
@@ -36,6 +36,10 @@ const tokenizeNetrcContent = (content: string) => {
     .filter(token => token.length > 0)
 }
 
+function includes<T extends U, U>(coll: ReadonlyArray<T>, el: U): el is T {
+  return coll.includes(el as T)
+}
+
 const parseNetrcTokens = (tokens: string[]) => {
   const machines: Record<string, NetrcMachine> = {}
   let i = 0
@@ -53,12 +57,12 @@ const parseNetrcTokens = (tokens: string[]) => {
         && tokens[i] !== 'machine'
         && tokens[i] !== 'default'
       ) {
-        const key = tokens[i] as keyof NetrcMachine
+        const key = tokens[i]
         const value = tokens[++i]
-        if (key === 'region') {
-          machineData[key] = value as RegionCode
+        if (key === 'region' && includes(regionCodes, value)) {
+          machineData[key] = value
         }
-        else {
+        else if (key === 'login' || key === 'password') {
           machineData[key] = value
         }
         i++

src/index.ts

@@ -6,6 +6,7 @@ import { formatHeader, handleError, konsola } from './utils'
 import { getProgram } from './program'
 import './commands/login'
 import './commands/logout'
+import { loginWithToken } from './commands/login/actions'
 
 dotenv.config() // This will load variables from .env into process.env
 const program = getProgram()
@@ -26,14 +27,14 @@ program.on('command:*', () => {
 
 program.command('test').action(async () => {
   konsola.title(`Test`, '#8556D3', 'Attempting a test...')
-  konsola.error('This is an error message')
-  /* try {
+
+  try {
     // await loginWithEmailAndPassword('aw', 'passwrod', 'eu')
     await loginWithToken('WYSYDHYASDHSYD', 'eu')
   }
   catch (error) {
     handleError(error as Error)
-  } */
+  }
 })
 
 /* console.log(`