日期操作服务优化

src/app/services/date.service.ts

@@ -1,127 +1,48 @@
-import { Injectable } from '@angular/core';
+import { Injectable } from "@angular/core";
+import {
+  addDays,
+  startOfWeek,
+  endOfMonth,
+  startOfDay,
+  addMonths,
+  startOfMonth,
+  startOfYear,
+  addYears,
+  endOfYear,
+} from "date-fns";
 
 @Injectable({
-  providedIn: 'root'
+  providedIn: "root",
 })
 export class DateService {
-
-  constructor() { }
+  constructor() {}
+  /**
+   * 日期操作
+   */
   date() {
-    /**
-     * 获取本周、本季度、本月、上月的开始日期、结束日期
-     */
-    var now = new Date(); //当前日期
-    var nowDayOfWeek = now.getDay(); //今天本周的第几天
-    var nowDay = now.getDate(); //当前日
-    var nowMonth = now.getMonth(); //当前月
-    var nowYear = now.getFullYear(); //当前年
-    nowYear += (nowYear < 2000) ? 1900 : 0; //
-    var lastMonthDate = new Date(); //上月日期
-    lastMonthDate.setDate(1);
-    lastMonthDate.setMonth(lastMonthDate.getMonth() - 1);
-    var lastYear = lastMonthDate.getFullYear();
-    var lastMonth = lastMonthDate.getMonth();
-    var lastMonthYear = lastMonthDate.getFullYear();//上月的年份
-    //格式化日期：yyyy-MM-dd
-    function formatDate(date) {
-      var myyear = date.getFullYear();
-      var mymonth = date.getMonth() + 1;
-      var myweekday = date.getDate();
-      if (mymonth < 10) {
-        mymonth = "0" + mymonth;
-      }
-      if (myweekday < 10) {
-        myweekday = "0" + myweekday;
-      }
-      return (myyear + "-" + mymonth + "-" + myweekday);
-    }
-    //获得某月的天数
-    function getMonthDays(myMonth) {
-      var monthStartDate = new Date(nowYear, myMonth, 1);
-      var monthEndDate = new Date(nowYear, myMonth + 1, 1);
-      var days = (Number(monthEndDate) - Number(monthStartDate)) / (1000 * 60 * 60 * 24);
-      return days;
-    }
-    //获得本季度的开始月份
-    function getQuarterStartMonth() {
-      var quarterStartMonth = 0;
-      if (nowMonth < 3) {
-        quarterStartMonth = 0;
-      }
-      if (2 < nowMonth && nowMonth < 6) {
-        quarterStartMonth = 3;
-      }
-      if (5 < nowMonth && nowMonth < 9) {
-        quarterStartMonth = 6;
-      }
-      if (nowMonth > 8) {
-        quarterStartMonth = 9;
-      }
-      return quarterStartMonth;
-    }
-    //获得本周的开始日期
-    function getWeekStartDate() {
-      var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
-      return weekStartDate;
-    }
-    //获得本周的结束日期
-    function getWeekEndDate() {
-      var weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));
-      return weekEndDate;
-    }
-    //获得上周的开始日期
+    //获得上周的开始日期(上周一 00:00:00)
     function getLastWeekStartDate() {
-      var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek - 6);
-      // var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek - 7);//周日为一周的第一天
-      return weekStartDate;
+      return addDays(startOfWeek(new Date()), -6);
     }
-    //获得上周的结束日期
+    //获得上周的结束日期(上周日 00:00:00)
     function getLastWeekEndDate() {
-      var weekEndDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
-      // var weekEndDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek-1);//周六为一周的最后一天
-      return weekEndDate;
+      return startOfWeek(new Date());
     }
-    //获得本月的开始日期
-    function getMonthStartDate() {
-      var monthStartDate = new Date(nowYear, nowMonth, 1);
-      return monthStartDate;
-    }
-    //获得本月的结束日期
-    function getMonthEndDate() {
-      var monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth));
-      return monthEndDate;
-    }
-    //获得上月开始时间
+    //获得上月开始时间(上月1号 00：00：00)
     function getLastMonthStartDate() {
-      var lastMonthStartDate = new Date(lastMonthYear, lastMonth, 1);
-      return lastMonthStartDate;
+      return startOfMonth(addMonths(new Date(), -1));
     }
-    //获得上月结束时间
+    //获得上月结束时间(上月底 00：00：00)
     function getLastMonthEndDate() {
-      var lastMonthEndDate = new Date(lastMonthYear, lastMonth, getMonthDays(lastMonth));
-      return lastMonthEndDate;
-    }
-    //获得本季度的开始日期
-    function getQuarterStartDate() {
-      var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1);
-      return quarterStartDate;
+      return startOfDay(endOfMonth(addMonths(new Date(), -1)));
     }
-    //获得本季度的结束日期
-    function getQuarterEndDate() {
-      var quarterEndMonth = getQuarterStartMonth() + 2;
-      var quarterStartDate = new Date(nowYear, quarterEndMonth,
-        getMonthDays(quarterEndMonth));
-      return quarterStartDate;
-    }
-    //获得上年的开始日期
+    //获得上年的开始日期(去年1月1日 00：00：00)
     function getLastYearStartDate() {
-      var yearStartDate = new Date(nowYear - 1, 0, 1);
-      return yearStartDate;
+      return startOfYear(addYears(new Date(), -1));
     }
     //获得上年的结束日期
     function getLastYearEndDate() {
-      var yearEndDate = new Date(nowYear - 1, 11, 31);
-      return yearEndDate;
+      return startOfDay(endOfYear(addYears(new Date(), -1)));
     }
     return {
       lastWeekStartDate: getLastWeekStartDate(),
@@ -130,7 +51,6 @@ export class DateService {
       lastMonthEndDate: getLastMonthEndDate(),
       lastYearStartDate: getLastYearStartDate(),
       lastYearEndDate: getLastYearEndDate(),
-      formatDate: formatDate,
-    }
+    };
   }
-}
+}