add server to monorepo.

packages/server/src/services/Branches/BranchValidate.ts

@@ -0,0 +1,52 @@
+import { Inject, Service } from 'typedi';
+import HasTenancyService from '@/services/Tenancy/TenancyService';
+import { ServiceError } from '@/exceptions';
+import { ERRORS } from './constants';
+
+@Service()
+export class BranchValidator {
+  @Inject()
+  tenancy: HasTenancyService;
+
+  public validateBranchNotOnlyWarehouse = async (
+    tenantId: number,
+    branchId: number
+  ) => {
+    const { Branch } = this.tenancy.models(tenantId);
+
+    const warehouses = await Branch.query().whereNot('id', branchId);
+
+    if (warehouses.length === 0) {
+      throw new ServiceError(ERRORS.COULD_NOT_DELETE_ONLY_BRANCH);
+    }
+  };
+
+  /**
+   * Validates the given branch whether is unique.
+   * @param {number} tenantId
+   * @param {string} code
+   * @param {number} exceptBranchId
+   */
+  public validateBranchCodeUnique = async (
+    tenantId: number,
+    code: string,
+    exceptBranchId?: number
+  ): Promise<void> => {
+    const { Branch } = this.tenancy.models(tenantId);
+
+    const branch = await Branch.query()
+      .onBuild((query) => {
+        query.select(['id']);
+        query.where('code', code);
+
+        if (exceptBranchId) {
+          query.whereNot('id', exceptBranchId);
+        }
+      })
+      .first();
+
+    if (branch) {
+      throw new ServiceError(ERRORS.BRANCH_CODE_NOT_UNIQUE);
+    }
+  };
+}