refactoring: balance sheet report.

refactoring: trial balance sheet report.
refactoring: general ledger report.
refactoring: journal report.
refactoring: P&L report.

server/src/services/FinancialStatements/TrialBalanceSheet/TrialBalanceSheet.ts

@@ -0,0 +1,101 @@
+
+import {
+  ITrialBalanceSheetQuery,
+  ITrialBalanceAccount,
+  IAccount,
+  IAccountType,
+} from 'interfaces';
+import FinancialSheet from '../FinancialSheet';
+import { flatToNestedArray } from 'utils';
+
+export default class TrialBalanceSheet extends FinancialSheet{
+  tenantId: number;
+  query: ITrialBalanceSheetQuery;
+  accounts: IAccount & { type: IAccountType }[];
+  journalFinancial: any;
+
+  /**
+   * Constructor method.
+   * @param {number} tenantId 
+   * @param {ITrialBalanceSheetQuery} query 
+   * @param {IAccount[]} accounts 
+   * @param journalFinancial 
+   */
+  constructor(
+    tenantId: number,
+    query: ITrialBalanceSheetQuery,
+    accounts: IAccount & { type: IAccountType }[],
+    journalFinancial: any
+  ) {
+    super();
+
+    this.tenantId = tenantId;
+    this.query = query;
+    this.numberFormat = this.query.numberFormat;
+    this.accounts = accounts;
+    this.journalFinancial = journalFinancial;
+    this.numberFormat = this.query.numberFormat;
+  }
+
+  /**
+   * Account mapper.
+   * @param {IAccount} account 
+   */
+  private accountMapper(account: IAccount & { type: IAccountType }): ITrialBalanceAccount {
+    const trial = this.journalFinancial.getTrialBalanceWithDepands(account.id);
+
+    // Retrieve all entries that associated to the given account.
+    const entries = this.journalFinancial.getAccountEntries(account.id)
+
+    return {
+      id: account.id,
+      parentAccountId: account.parentAccountId,
+      name: account.name,
+      code: account.code,
+      accountNormal: account.type.normal,
+      hasTransactions: entries.length > 0,
+
+      credit: trial.credit,
+      debit: trial.debit,
+      balance: trial.balance,
+
+      formattedCredit: this.formatNumber(trial.credit),
+      formattedDebit: this.formatNumber(trial.debit),
+      formattedBalance: this.formatNumber(trial.balance),
+    };
+  }
+
+  /**
+   * Accounts walker.
+   * @param {IAccount[]} accounts 
+   */
+  private accountsWalker(
+    accounts: IAccount & { type: IAccountType }[]
+  ): ITrialBalanceAccount[] {
+    const flattenAccounts = accounts
+      // Mapping the trial balance accounts sections.
+      .map((account: IAccount & { type: IAccountType }) => this.accountMapper(account))
+
+      // Filter accounts that have no transaction when `noneTransactions` is on.
+      .filter((trialAccount: ITrialBalanceAccount): boolean =>
+        !(!trialAccount.hasTransactions && this.query.noneTransactions),
+      )
+      // Filter accounts that have zero total amount when `noneZero` is on.
+      .filter(
+        (trialAccount: ITrialBalanceAccount): boolean =>
+          !(trialAccount.credit === 0 && trialAccount.debit === 0 && this.query.noneZero)
+    );
+    
+    return flatToNestedArray(
+      flattenAccounts,      
+      { id: 'id', parentId: 'parentAccountId' },
+    );
+  }
+
+  /**
+   * Retrieve trial balance sheet statement data.
+   */
+  public reportData() {
+    return this.accountsWalker(this.accounts);
+  }
+}