refactor: financial reports to nestjs

temp/CashFlow/CashflowExportInjectable.ts

@@ -0,0 +1,37 @@
+import { Injectable } from '@nestjs/common';
+import { CashflowTableInjectable } from './CashflowTableInjectable';
+import { ICashFlowStatementQuery } from './Cashflow.types';
+import { TableSheet } from '../../common/TableSheet';
+
+@Injectable()
+export class CashflowExportInjectable {
+  constructor(private readonly cashflowSheetTable: CashflowTableInjectable) {}
+
+  /**
+   * Retrieves the cashflow sheet in XLSX format.
+   * @param {ICashFlowStatementQuery} query - Cashflow statement query.
+   * @returns {Promise<Buffer>}
+   */
+  public async xlsx(query: ICashFlowStatementQuery): Promise<Buffer> {
+    const table = await this.cashflowSheetTable.table(query);
+
+    const tableSheet = new TableSheet(table.table);
+    const tableCsv = tableSheet.convertToXLSX();
+
+    return tableSheet.convertToBuffer(tableCsv, 'xlsx');
+  }
+
+  /**
+   * Retrieves the cashflow sheet in CSV format.
+   * @param {ICashFlowStatementQuery} query - Cashflow statement query.
+   * @returns {Promise<Buffer>}
+   */
+  public async csv(query: ICashFlowStatementQuery): Promise<string> {
+    const table = await this.cashflowSheetTable.table(query);
+
+    const tableSheet = new TableSheet(table.table);
+    const tableCsv = tableSheet.convertToCSV();
+
+    return tableCsv;
+  }
+}