chore: better typing for parseRemoveBackground

Author: jerzy-mankowski

packages/react/src/transformationParsers/parseEffects.ts

@@ -8,8 +8,7 @@ export const parseEffects = (parseRemoveBackground: typeof ParseRemoveBackground
         case 'sepia':
           return `e_sepia${effect.level ? `:${effect.level}` : ''}`;
         case 'backgroundRemoval':
-        // FIXME
-          return parseRemoveBackground(effect.mode ?? true) as any;
+          return parseRemoveBackground(effect.mode ?? true);
         case 'fade':
           return `e_fade:${effect.duration}`;
         case 'gamma':

packages/react/src/transformationParsers/parseRemoveBackground.ts

@@ -1,8 +1,8 @@
 import { RemoveBackground } from '../transformationTypes/removeBackground';
 
-export const parseRemoveBackground = (removeBackground: RemoveBackground) => {
+export const parseRemoveBackground = <Value extends RemoveBackground>(removeBackground: Value): Value extends false ? '' : `e_${string}` => {
   if (!removeBackground) {
-    return '';
+    return '' as Value extends false ? '' : `e_${string}`;
   }
 
   return removeBackground === 'fineEdges' ? 'e_background_removal:fineedges_y' : 'e_background_removal';