Check input combinations

src/delete.ts

@@ -49,6 +49,10 @@ export function deleteVersions(input: Input): Observable<boolean> {
     return throwError('No token found')
   }
 
+  if (!input.checkInput()) {
+    return throwError('Invalid input combination')
+  }
+
   if (input.numOldVersionsToDelete <= 0) {
     console.log(
       'Number of old versions to delete input is 0 or less, no versions will be deleted'

src/input.ts

@@ -47,23 +47,6 @@ export class Input {
     this.ignoreVersions = validatedParams.ignoreVersions
     this.deletePreReleaseVersions = validatedParams.deletePreReleaseVersions
     this.token = validatedParams.token
-
-    if (
-      this.numOldVersionsToDelete > 1 &&
-      (this.minVersionsToKeep >= 0 || this.deletePreReleaseVersions == 'true')
-    ) {
-      throwError('Invalid input combination')
-    }
-
-    if (this.deletePreReleaseVersions === 'true') {
-      this.minVersionsToKeep =
-        this.minVersionsToKeep > 0 ? this.minVersionsToKeep : 0
-      this.ignoreVersions = new RegExp('^(0|[1-9]\\d*)((\\.(0|[1-9]\\d*))*)$')
-    }
-
-    if (this.minVersionsToKeep >= 0) {
-      this.numOldVersionsToDelete = 0
-    }
   }
 
   hasOldestVersionQueryInfo(): boolean {
@@ -76,4 +59,25 @@ export class Input {
       this.token
     )
   }
+
+  checkInput(): boolean {
+    if (
+      this.numOldVersionsToDelete > 1 &&
+      (this.minVersionsToKeep >= 0 || this.deletePreReleaseVersions === 'true')
+    ) {
+      return false
+    }
+
+    if (this.deletePreReleaseVersions === 'true') {
+      this.minVersionsToKeep =
+        this.minVersionsToKeep > 0 ? this.minVersionsToKeep : 0
+      this.ignoreVersions = new RegExp('^(0|[1-9]\\d*)((\\.(0|[1-9]\\d*))*)$')
+    }
+
+    if (this.minVersionsToKeep >= 0) {
+      this.numOldVersionsToDelete = 0
+    }
+
+    return true
+  }
 }