challenge solved

src/filter.js

@@ -1,5 +1,100 @@
+const sub = require('date-fns/sub');
+const format = require('date-fns/format');
+const startOfYear = require('date-fns/startOfYear');
+const endOfYear = require('date-fns/endOfYear');
+const esLocale = require('date-fns/locale/es');
+const startOfMonth = require('date-fns/startOfMonth');
+const endOfMonth = require('date-fns/endOfMonth');
+
+class DateFilter {
+  /**
+   * Create date filter
+   * @param {string} label label of filter
+   * @param {Date} startAt start at date
+   * @param {Date} endAt end at date
+   */
+  constructor(label, startAt, endAt) {
+    this.label = label;
+    this.startAt = format(startAt, 'yyyy/MM/dd');
+    this.endAt = format(endAt, 'yyyy/MM/dd');
+  }
+}
+
+class FilterPerDay extends DateFilter {
+  /**
+   * Create filter per day
+   * @param {Date} date base date
+   * @param {number} day Previous days
+   */
+  constructor(date, day) {
+    super(`Últimos ${day} días`, sub(date, { days: day }), date);
+  }
+}
+
+/**
+ * Create filters with arrays of days
+ * @param {Date} date base date
+ * @param {number[]} days days for filters
+ * @returns {FilterPerDay[]} Array of filters per day
+ */
+const makeFilterPerDay = (date, days) => days.map(day => new FilterPerDay(date, day));
+
+
+class FilterPerYear extends DateFilter {
+  /**
+   * Create filter per year
+   * @param {*} date base date
+   * @param {*} year Previous years
+   */
+  constructor(date, year) {
+    const yearBaseDate = sub(date, { years: year });
+    super(
+      format(yearBaseDate, 'yyyy'),
+      startOfYear(yearBaseDate),
+      endOfYear(yearBaseDate)
+    );
+  }
+}
+
+/**
+ * Create filters with arrays of years
+ * @param {date} date base date
+ * @param {number[]} years years for filters
+ * @returns {FilterPerYear[]} Array of filters per year
+ */
+const makeFilterPerYear = (date, years) => years.map(year => new FilterPerYear(date, year));
+
+
+class FilterPerMonth extends DateFilter {
+  /**
+   * Create filter per month
+   * @param {Date} date base date
+   * @param {number} month Previous months
+   */
+  constructor(date, month) {
+    const monthBaseDate = sub(date, { months: month });
+    super(
+      format(monthBaseDate, 'MMMM', { locale: esLocale }),
+      startOfMonth(monthBaseDate),
+      endOfMonth(monthBaseDate)
+    );
+  }
+}
+
+/**
+ * Create filters with arrays of months
+ * @param {Date} date base date
+ * @param {number[]} months months for filters
+ * @returns {FilterPerMonth[]} Array of filters per months
+ */
+const makeFilterPerMonth = (date, months) => months.map(month => new FilterPerMonth(date, month));
+
 const makeFilter = (date) => {
-  let filters = [];
+  let filters = [
+    ...makeFilterPerDay(date, [7, 28, 90, 365]),
+    ...makeFilterPerYear(date, [1, 2, 3]),
+    ...makeFilterPerMonth(date, [1, 2, 3])
+  ];
   return filters;
 }