Use null instead of '' to denote no version

Author: Nixinova

changelog.md

@@ -2,6 +2,7 @@
 
 ## Next
 - Added basic message when no arguments are given.
+- Changed output of `getVersions` to return `null` instead of `''` when a version is not present.
 - Changed output of `getVersions` to replace '`.x`' with the actual game version.
 - Changed CLI output of `--list` to present the versions in prose instead of JSON.
 - Changed help message.

src/index.ts

@@ -182,9 +182,9 @@ function getPackFormats(version: string): Record<PackType, FormatResult> {
  * @returns an object containing minimum and maximum applicable release and snapshot versions
  */
 function getVersions(format: number, type: PackType = 'resource'): VersionsResult {
-    let output: VersionsResult = {
-        'releases': { 'min': '', 'max': '' },
-        'snapshots': { 'min': '', 'max': '' },
+    const output: VersionsResult = {
+        'releases': { 'min': null, 'max': null },
+        'snapshots': { 'min': null, 'max': null },
     }
     if (!format || format > LATEST[type] || (type === 'data' && format < 4)) return output
 

src/types.ts

@@ -7,6 +7,6 @@ export type PackMap = Record<PackType, FormatResult>
 export type FormatResult = number | null | undefined
 
 export interface VersionsResult {
-    releases: { min: VersionName | '', max: VersionName | '' },
-    snapshots: { min: SnapshotName | '', max: SnapshotName | '' },
+    releases: { min: VersionName | null, max: VersionName | null },
+    snapshots: { min: SnapshotName | null, max: SnapshotName | null },
 }

test/test.js

@@ -47,13 +47,13 @@ function testPackFormats() {
 
 testPackFormats()
 
-testVersions([3, 'data'], { releases: { min: '', max: '' }, snapshots: { min: '', max: '' } })
-testVersions([10, 'resource'], { releases: { min: '', max: '' }, snapshots: { min: '', max: '' } })
-testVersions([6, 'resource'], { releases: { min: '1.16.2', max: '1.16.5' }, snapshots: { min: '', max: '' } })
+testVersions([3, 'data'], { releases: { min: null, max: null }, snapshots: { min: null, max: null } })
+testVersions([10, 'resource'], { releases: { min: null, max: null }, snapshots: { min: null, max: null } })
+testVersions([6, 'resource'], { releases: { min: '1.16.2', max: '1.16.5' }, snapshots: { min: null, max: null } })
 testVersions([6, 'data'], { releases: { min: '1.16.2', max: '1.16.5' }, snapshots: { min: '20w45a', max: '20w45a' } })
 testVersions([7, 'resource'], { releases: { min: '1.17', max: '1.17.1' }, snapshots: { min: '20w45a', max: '21w38a' } })
 testVersions([10, 'data'], { releases: { min: '1.19', max: '1.19.3' }, snapshots: { min: '22w11a', max: '23w02a' } })
-testVersions([11, 'resource'], { releases: { min: '', max: '' }, snapshots: { min: '22w42a', max: '22w44a' } })
+testVersions([11, 'resource'], { releases: { min: null, max: null }, snapshots: { min: '22w42a', max: '22w44a' } })
 testVersions([15, 'data'], { releases: { min: '1.20', max: '1.20.1' }, snapshots: { min: '23w18a', max: '23w30a' } })
 
 console.log(`\nRan ${total} tests | ${passed} passed | ${failed} failed`)