add server to monorepo.

packages/server/src/services/FinancialStatements/FinancialDateRanges.ts

@@ -0,0 +1,110 @@
+import { IDateRange, IFinancialDatePeriodsUnit } from '@/interfaces';
+import moment from 'moment';
+
+export const FinancialDateRanges = (Base) =>
+  class extends Base {
+    /**
+     * Retrieve previous period (PP) date of the given date.
+     * @param   {Date} fromDate -
+     * @param   {Date} toDate -
+     * @param   {IFinancialDatePeriodsUnit} unit -
+     * @returns {Date}
+     */
+    protected getPreviousPeriodDate = (
+      date: Date,
+      value: number = 1,
+      unit: IFinancialDatePeriodsUnit = IFinancialDatePeriodsUnit.Day
+    ): Date => {
+      return moment(date).subtract(value, unit).toDate();
+    };
+
+    /**
+     * Retrieves the different 
+     * @param {Date} fromDate
+     * @param {Date} toDate
+     * @returns
+     */
+    protected getPreviousPeriodDiff = (fromDate: Date, toDate: Date) => {
+      return moment(toDate).diff(fromDate, 'days') + 1;
+    };
+
+    /**
+     * Retrieves the periods period dates.
+     * @param {Date} fromDate -
+     * @param {Date} toDate -
+     */
+    protected getPreviousPeriodDateRange = (
+      fromDate: Date,
+      toDate: Date,
+      unit: IFinancialDatePeriodsUnit,
+      amount: number = 1
+    ): IDateRange => {
+      const PPToDate = this.getPreviousPeriodDate(toDate, amount, unit);
+      const PPFromDate = this.getPreviousPeriodDate(fromDate, amount, unit);
+
+      return { toDate: PPToDate, fromDate: PPFromDate };
+    };
+
+    /**
+     * Retrieves the previous period (PP) date range of total column.
+     * @param   {Date} fromDate
+     * @param   {Date} toDate
+     * @returns {IDateRange}
+     */
+    protected getPPTotalDateRange = (
+      fromDate: Date,
+      toDate: Date
+    ): IDateRange => {
+      const unit = this.getPreviousPeriodDiff(fromDate, toDate);
+
+      return this.getPreviousPeriodDateRange(
+        fromDate,
+        toDate,
+        IFinancialDatePeriodsUnit.Day,
+        unit
+      );
+    };
+
+    /**
+     * Retrieves the previous period (PP) date range of date periods columns.
+     * @param   {Date} fromDate -
+     * @param   {Date} toDate -
+     * @param   {IFinancialDatePeriodsUnit}
+     * @returns {IDateRange}
+     */
+    protected getPPDatePeriodDateRange = (
+      fromDate: Date,
+      toDate: Date,
+      unit: IFinancialDatePeriodsUnit
+    ): IDateRange => {
+      return this.getPreviousPeriodDateRange(fromDate, toDate, unit, 1);
+    };
+
+    // ------------------------
+    // Previous Year (PY).
+    // ------------------------
+    /**
+     * Retrieve the previous year of the given date.
+     * @params  {Date} date
+     * @returns {Date}
+     */
+    getPreviousYearDate = (date: Date) => {
+      return moment(date).subtract(1, 'years').toDate();
+    };
+
+    /**
+     * Retrieves previous year date range.
+     * @param   {Date} fromDate
+     * @param   {Date} toDate
+     * @returns {IDateRange}
+     */
+    protected getPreviousYearDateRange = (
+      fromDate: Date,
+      toDate: Date
+    ): IDateRange => {
+      const PYFromDate = this.getPreviousYearDate(fromDate);
+      const PYToDate = this.getPreviousYearDate(toDate);
+
+      return { fromDate: PYFromDate, toDate: PYToDate };
+    };
+  };