♻️ Refactoring

 (#2020)

Author: KATO-Hiro

src/lib/services/workbooks.ts

@@ -97,7 +97,7 @@ export async function createWorkBook(workBook: WorkBook): Promise<void> {
 }
 
 async function isExistingUrlSlug(slug: string): Promise<boolean> {
-  return (await getWorkBookByUrlSlug(slug)) ? true : false;
+  return !!(await getWorkBookByUrlSlug(slug));
 }
 
 async function isExistingWorkBook(workBookId: number): Promise<boolean> {

src/lib/utils/workbook.ts

@@ -35,7 +35,7 @@ export async function getWorkbookWithAuthor(
 
   // Validate if the author of the workbook exists after the workbook has been created.
   const workbookAuthor = await userCrud.getUserById(workBook.authorId);
-  const isExistingAuthor = workbookAuthor ? true : false;
+  const isExistingAuthor = !!workbookAuthor;
 
   return { workBook: workBook, isExistingAuthor: isExistingAuthor };
 }