From 79f08c362ca037a94c3759f38be7341f6f5548b0 Mon Sep 17 00:00:00 2001
From: lyt <1105290566@qq.com>
Date: Mon, 21 Jun 2021 15:49:16 +0800
Subject: [PATCH] =?UTF-8?q?'admin-21.06.21:=E4=BC=98=E5=8C=96=E6=97=B6?=
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---
 src/utils/formatTime.ts | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/utils/formatTime.ts b/src/utils/formatTime.ts
index 632d6be7..441e30c3 100644
--- a/src/utils/formatTime.ts
+++ b/src/utils/formatTime.ts
@@ -5,11 +5,13 @@
  * @description format 字符串随意，如 `YYYY-mm、YYYY-mm-dd`
  * @description format 季度："YYYY-mm-dd HH:MM:SS QQQQ"
  * @description format 星期："YYYY-mm-dd HH:MM:SS WWW"
- * @description format 季度 + 星期："YYYY-mm-dd HH:MM:SS WWW QQQQ"
+ * @description format 几周："YYYY-mm-dd HH:MM:SS ZZZ"
+ * @description format 季度 + 星期 + 几周："YYYY-mm-dd HH:MM:SS WWW QQQQ ZZZ"
  * @returns 返回拼接后的时间字符串
  */
 export function formatDate(date: Date, format: string): string {
 	let we = date.getDay(); // 星期
+	let z = getWeek(date); // 周
 	let qut = Math.floor((date.getMonth() + 3) / 3).toString(); // 季度
 	const opt: { [key: string]: string } = {
 		'Y+': date.getFullYear().toString(), // 年
@@ -40,6 +42,7 @@ export function formatDate(date: Date, format: string): string {
 	if (/(W+)/.test(format))
 		format = format.replace(RegExp.$1, RegExp.$1.length > 1 ? (RegExp.$1.length > 2 ? '星期' + week[we] : '周' + week[we]) : week[we]);
 	if (/(Q+)/.test(format)) format = format.replace(RegExp.$1, RegExp.$1.length == 4 ? '第' + quarter[qut] + '季度' : quarter[qut]);
+	if (/(Z+)/.test(format)) format = format.replace(RegExp.$1, RegExp.$1.length == 3 ? '第' + z + '周' : z + '');
 	for (let k in opt) {
 		let r = new RegExp('(' + k + ')').exec(format);
 		// 若输入的长度不为1，则前面补零
@@ -48,6 +51,27 @@ export function formatDate(date: Date, format: string): string {
 	return format;
 }
 
+/**
+ * 获取当前日期是第几周
+ * @param dateTime 当前传入的日期值
+ * @returns 返回第几周数字值
+ */
+export function getWeek(dateTime: Date): number {
+	let temptTime = new Date(dateTime.getTime());
+	// 周几
+	let weekday = temptTime.getDay() || 7;
+	// 周1+5天=周六
+	temptTime.setDate(temptTime.getDate() - weekday + 1 + 5);
+	let firstDay = new Date(temptTime.getFullYear(), 0, 1);
+	let dayOfWeek = firstDay.getDay();
+	let spendDay = 1;
+	if (dayOfWeek != 0) spendDay = 7 - dayOfWeek + 1;
+	firstDay = new Date(temptTime.getFullYear(), 0, 1 + spendDay);
+	let d = Math.ceil((temptTime.valueOf() - firstDay.valueOf()) / 86400000);
+	let result = Math.ceil(d / 7);
+	return result;
+}
+
 /**
  * 将时间转换为 `几秒前`、`几分钟前`、`几小时前`、`几天前`
  * @param param 当前时间，new Date() 格式或者字符串时间格式