add server to monorepo.

packages/server/src/services/Expenses/ExpenseGLEntries.ts

@@ -0,0 +1,106 @@
+import * as R from 'ramda';
+import { Service } from 'typedi';
+import {
+  AccountNormal,
+  IExpense,
+  IExpenseCategory,
+  ILedger,
+  ILedgerEntry,
+} from '@/interfaces';
+import Ledger from '@/services/Accounting/Ledger';
+
+@Service()
+export class ExpenseGLEntries {
+  /**
+   * Retrieves the expense GL common entry.
+   * @param {IExpense} expense
+   * @returns
+   */
+  private getExpenseGLCommonEntry = (expense: IExpense) => {
+    return {
+      currencyCode: expense.currencyCode,
+      exchangeRate: expense.exchangeRate,
+
+      transactionType: 'Expense',
+      transactionId: expense.id,
+
+      date: expense.paymentDate,
+      userId: expense.userId,
+
+      debit: 0,
+      credit: 0,
+
+      branchId: expense.branchId,
+    };
+  };
+
+  /**
+   * Retrieves the expense GL payment entry.
+   * @param   {IExpense} expense
+   * @returns {ILedgerEntry}
+   */
+  private getExpenseGLPaymentEntry = (expense: IExpense): ILedgerEntry => {
+    const commonEntry = this.getExpenseGLCommonEntry(expense);
+
+    return {
+      ...commonEntry,
+      credit: expense.localAmount,
+      accountId: expense.paymentAccountId,
+      accountNormal: AccountNormal.CREDIT,
+      index: 1,
+    };
+  };
+
+  /**
+   * Retrieves the expense GL category entry.
+   * @param   {IExpense} expense -
+   * @param   {IExpenseCategory} expenseCategory -
+   * @param   {number} index
+   * @returns {ILedgerEntry}
+   */
+  private getExpenseGLCategoryEntry = R.curry(
+    (
+      expense: IExpense,
+      category: IExpenseCategory,
+      index: number
+    ): ILedgerEntry => {
+      const commonEntry = this.getExpenseGLCommonEntry(expense);
+      const localAmount = category.amount * expense.exchangeRate;
+
+      return {
+        ...commonEntry,
+        accountId: category.expenseAccountId,
+        accountNormal: AccountNormal.DEBIT,
+        debit: localAmount,
+        note: category.description,
+        index: index + 2,
+        projectId: category.projectId,
+      };
+    }
+  );
+
+  /**
+   * Retrieves the expense GL entries.
+   * @param   {IExpense} expense
+   * @returns {ILedgerEntry[]}
+   */
+  public getExpenseGLEntries = (expense: IExpense): ILedgerEntry[] => {
+    const getCategoryEntry = this.getExpenseGLCategoryEntry(expense);
+
+    const paymentEntry = this.getExpenseGLPaymentEntry(expense);
+    const categoryEntries = expense.categories.map(getCategoryEntry);
+
+    return [paymentEntry, ...categoryEntries];
+  };
+
+  /**
+   * Retrieves the given expense ledger.
+   * @param   {IExpense} expense
+   * @returns {ILedger}
+   */
+  public getExpenseLedger = (expense: IExpense): ILedger => {
+    const entries = this.getExpenseGLEntries(expense);
+
+    return new Ledger(entries);
+  };
+}