refactor: ♻️ 2.0 (#3)

src/backend/NSExt/Extensions/DateTimeExtensions.cs

@@ -0,0 +1,110 @@
+// ReSharper disable InconsistentNaming
+// ReSharper disable UnusedMember.Global
+
+#pragma warning disable SA1300, IDE1006
+namespace NSExt.Extensions;
+
+/// <summary>
+///     DateTimeExtensions
+/// </summary>
+public static class DateTimeExtensions
+{
+    /// <summary>
+    ///     指定时间的世界协调时的unix时间戳形式
+    /// </summary>
+    /// <param name="me">me</param>
+    /// <returns>unix时间戳</returns>
+    public static long TimeUnixUtc(this DateTime me)
+    {
+        return (me.ToUniversalTime().Ticks - 621355968000000000) / 10000000;
+    }
+
+    /// <summary>
+    ///     指定时间的世界协调时的unix时间戳形式（毫秒）
+    /// </summary>
+    public static long TimeUnixUtcMs(this DateTime me)
+    {
+        return (me.ToUniversalTime().Ticks - 621355968000000000) / 10000;
+    }
+
+    /// <summary>
+    ///     ToString 的 Invariant 版本
+    /// </summary>
+    public static string ToInvString(this DateTime me)
+    {
+        return me.ToString(CultureInfo.InvariantCulture);
+    }
+
+    /// <summary>
+    ///     将一个过去时间对象与当前时间相减转换成“xx以前”的字符串, 如2秒以前, 3天以前
+    /// </summary>
+    /// <param name="me">me</param>
+    /// <returns>字符串</returns>
+    public static string UtcTimeAgo(this DateTime me)
+    {
+        var ts = DateTime.UtcNow - me;
+        return ts.Days switch {
+                   > 0 => ts.Days + "天前"
+                 , _ => ts.Hours switch {
+                            > 0 => ts.Hours + "小时前"
+                          , _   => ts.Minutes switch { > 0 => ts.Minutes + "分钟前", _ => ts.Seconds + "秒前" }
+                        }
+               };
+    }
+
+    /// <summary>
+    ///     yyyy_MM
+    /// </summary>
+    public static string yyyy_MM(this DateTime me)
+    {
+        return me.ToString("yyyy-MM", CultureInfo.InvariantCulture);
+    }
+
+    /// <summary>
+    ///     yyyy_MM_dd
+    /// </summary>
+    public static string yyyy_MM_dd(this DateTime me)
+    {
+        return me.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture);
+    }
+
+    /// <summary>
+    ///     yyyy_MM_dd_HH_mm
+    /// </summary>
+    public static string yyyy_MM_dd_HH_mm(this DateTime me)
+    {
+        return me.ToString("yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture);
+    }
+
+    /// <summary>
+    ///     yyyy_MM_dd_HH_mm_ss
+    /// </summary>
+    public static string yyyy_MM_dd_HH_mm_ss(this DateTime me)
+    {
+        return me.ToString("yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture);
+    }
+
+    /// <summary>
+    ///     yyyy_MM_dd_HH_mm_ss_fff
+    /// </summary>
+    public static string yyyy_MM_dd_HH_mm_ss_fff(this DateTime me)
+    {
+        return me.ToString("yyyy-MM-dd HH:mm:ss.fff", CultureInfo.InvariantCulture);
+    }
+
+    /// <summary>
+    ///     yyyyMM
+    /// </summary>
+    public static string yyyyMM(this DateTime me)
+    {
+        return me.ToString("yyyyMM", CultureInfo.InvariantCulture);
+    }
+
+    /// <summary>
+    ///     yyyyMMdd
+    /// </summary>
+    public static string yyyyMMdd(this DateTime me)
+    {
+        return me.ToString("yyyyMMdd", CultureInfo.InvariantCulture);
+    }
+}