feat: added filter for already borrowed title on borrow screen (#155)

* feat: add filter for already borrowed title on borrow screen

README.md

@@ -2,8 +2,6 @@
 
 [![Build](https://github.com/librarian-org/librarian/actions/workflows/build.yml/badge.svg)](https://github.com/librarian-org/librarian/actions/workflows/build.yml)
 
-> **NOTE**: This project is in Work-In-Progress stage, so it's not functional yet...
-
 A free OpenSource software to handle with books. It's ideal for school libraries
 and for someone who have many books.
 

src/electron/database/repository/TitlePublisherRepository.ts

@@ -1,23 +1,35 @@
 import RepositoryBase from './RepositoryBase';
+import { BorrowStatus } from '../../../common/BorrowStatus';
 
 interface ListTitlePublisher {
   where: unknown;
 }
 
 export default class TitlePublisherRepository extends RepositoryBase {
-  public async listTitle(content: ListTitlePublisher): Promise<unknown | unknown[]> {
+  public async listTitle(
+    content: ListTitlePublisher
+  ): Promise<unknown | unknown[]> {
     try {
-      const filter = {
-        relations: [
-          'title',
-        ],
-      };
+      const freeTitles = await this.repository
+        .createQueryBuilder('titlePublisher')
+        .innerJoinAndSelect('titlePublisher.title', 'title')
+        .leftJoinAndSelect('titlePublisher.borrow', 'borrow')
+        .where('borrow.isReservation IS NULL')
+        .orWhere((qb) => {
+          const subQuery = qb
+            .subQuery()
+            .select('borrow.Id')
+            .from('borrow', 'borrow')
+            .where('borrow.status IN (:...ids)', {
+              ids: [BorrowStatus.Returned, BorrowStatus.LateReturned],
+            })
+            .getQuery();
 
-      // if (content.where) {
-      //   filter = { ...filter, ...{ where: content } };
-      // }
+          return `"titlePublisher"."id" IN ${subQuery}`;
+        })
+        .getMany();
 
-      return await this.repository.find(filter);
+      return freeTitles;
     } catch (err) {
       console.log(err);
       throw err;