refactor: split the services to multiple service classes (#202)

packages/server/src/services/Purchases/Bills/BillInventoryTransactions.ts

@@ -0,0 +1,82 @@
+import { Knex } from 'knex';
+import { Inject, Service } from 'typedi';
+import InventoryService from '@/services/Inventory/Inventory';
+import ItemsEntriesService from '@/services/Items/ItemsEntriesService';
+import HasTenancyService from '@/services/Tenancy/TenancyService';
+
+@Service()
+export class BillInventoryTransactions {
+  @Inject()
+  private tenancy: HasTenancyService;
+
+  @Inject()
+  private itemsEntriesService: ItemsEntriesService;
+
+  @Inject()
+  private inventoryService: InventoryService;
+
+  /**
+   * Records the inventory transactions from the given bill input.
+   * @param  {Bill} bill - Bill model object.
+   * @param  {number} billId - Bill id.
+   * @return {Promise<void>}
+   */
+  public async recordInventoryTransactions(
+    tenantId: number,
+    billId: number,
+    override?: boolean,
+    trx?: Knex.Transaction
+  ): Promise<void> {
+    const { Bill } = this.tenancy.models(tenantId);
+
+    // Retireve bill with assocaited entries and allocated cost entries.
+    const bill = await Bill.query(trx)
+      .findById(billId)
+      .withGraphFetched('entries.allocatedCostEntries');
+
+    // Loads the inventory items entries of the given sale invoice.
+    const inventoryEntries =
+      await this.itemsEntriesService.filterInventoryEntries(
+        tenantId,
+        bill.entries
+      );
+    const transaction = {
+      transactionId: bill.id,
+      transactionType: 'Bill',
+      exchangeRate: bill.exchangeRate,
+
+      date: bill.billDate,
+      direction: 'IN',
+      entries: inventoryEntries,
+      createdAt: bill.createdAt,
+
+      warehouseId: bill.warehouseId,
+    };
+    await this.inventoryService.recordInventoryTransactionsFromItemsEntries(
+      tenantId,
+      transaction,
+      override,
+      trx
+    );
+  }
+
+  /**
+   * Reverts the inventory transactions of the given bill id.
+   * @param {number} tenantId - Tenant id.
+   * @param {number} billId - Bill id.
+   * @return {Promise<void>}
+   */
+  public async revertInventoryTransactions(
+    tenantId: number,
+    billId: number,
+    trx?: Knex.Transaction
+  ) {
+    // Deletes the inventory transactions by the given reference id and type.
+    await this.inventoryService.deleteInventoryTransactions(
+      tenantId,
+      billId,
+      'Bill',
+      trx
+    );
+  }
+}