WIP: customer balance report.

server/src/services/FinancialStatements/TransactionsByCustomer/TransactionsByCustomers.ts

@@ -0,0 +1,81 @@
+import * as R from 'ramda';
+import FinancialSheet from '../FinancialSheet';
+import { IAccountTransaction, ICustomer } from 'interfaces';
+import { transaction } from 'objection';
+
+export default class TransactionsByCustomers extends FinancialSheet {
+  customers: ICustomer[];
+  transactionsByContact: any;
+  baseCurrency: string;
+
+  /**
+   * Constructor method.
+   * @param {ICustomer} customers
+   * @param transactionsByContact
+   * @param {string} baseCurrency
+   */
+  constructor(
+    customers: ICustomer[],
+    transactionsByContact: Map<number, IAccountTransaction[]>,
+    baseCurrency: string
+  ) {
+    super();
+
+    this.customers = customers;
+    this.transactionsByContact = transactionsByContact;
+    this.baseCurrency = baseCurrency;
+  }
+
+  /**
+   *
+   */
+  private customerTransactionMapper(
+    transaction
+  ): ITransactionsByCustomersTransaction {
+    return {
+      credit: transaction.credit,
+      debit: transaction.debit,
+      transactionNumber: transaction.transactionNumber,
+      referenceNumber: transaction.referenceNumber,
+      date: transaction.date,
+      createdAt: transaction.createdAt,
+    };
+  }
+
+  private customerTransactionRunningBalance(
+    openingBalance: number,
+    transaction: ITransactionsByCustomersTransaction
+  ): ITransactionsByCustomersTransaction {
+    
+  }
+
+  private customerTransactions(customerId: number) {
+    const transactions = this.transactionsByContact.get(customerId + '') || [];
+
+    return R.compose(
+      R.map(this.customerTransactionMapper),
+      R.map(R.curry(this.customerTransactionRunningBalance(0)))
+    ).bind(this)(transactions);
+  }
+
+  private customerMapper(customer: ICustomer) {
+    return {
+      customerName: customer.displayName,
+      openingBalance: {},
+      closingBalance: {},
+      transactions: this.customerTransactions(customer.id),
+    };
+  }
+
+  private customersMapper(customers: ICustomer[]) {
+    return customers.map(this.customerMapper.bind(this));
+  }
+
+  public reportData() {
+    return this.customersMapper(this.customers);
+  }
+
+  public reportColumns() {
+    return [];
+  }
+}