feat: add cron skipping date

Endpoint/Common/Services/CronUpdateSkipService.cs

@@ -0,0 +1,69 @@
+using Cronos;
+using Mirea.Api.Endpoint.Configuration.Model.GeneralSettings;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Mirea.Api.Endpoint.Common.Services;
+
+public static class CronUpdateSkipService
+{
+    public static ScheduleSettings.CronUpdateSkip Get(this Dto.Common.CronUpdateSkip date)
+    {
+        if (date.Date.HasValue)
+            return new ScheduleSettings.CronUpdateSkip(date.Date.Value);
+        if (date is { Start: not null, End: not null })
+            return new ScheduleSettings.CronUpdateSkip(date.Start.Value, date.End.Value);
+
+        throw new ArgumentException("It is impossible to create a structure because it has incorrect values.");
+    }
+
+    public static List<ScheduleSettings.CronUpdateSkip> Filter(this List<ScheduleSettings.CronUpdateSkip> data, DateOnly? currentDate = null)
+    {
+        currentDate ??= DateOnly.FromDateTime(DateTime.Now);
+        return data.OrderBy(x => x.End ?? x.Date)
+            .Where(x => x.Date == currentDate || (x.Start <= currentDate && x.End >= currentDate))
+            .ToList();
+    }
+
+    public static List<ScheduleSettings.CronUpdateSkip> Filter(this List<ScheduleSettings.CronUpdateSkip> data, DateTime? currentDate = null) =>
+        data.Filter(DateOnly.FromDateTime(currentDate ?? DateTime.Now));
+
+    public static List<DateTimeOffset> GetNextTask(this List<ScheduleSettings.CronUpdateSkip> data,
+        CronExpression expression, int depth = 1, DateOnly? currentDate = null)
+    {
+        if (depth <= 0)
+            return [];
+
+        currentDate ??= DateOnly.FromDateTime(DateTime.UtcNow);
+        DateTimeOffset nextRunTime = currentDate.Value.ToDateTime(new TimeOnly(0, 0, 0));
+
+        List<DateTimeOffset> result = [];
+
+        do
+        {
+            var lastSkip = data.Filter(nextRunTime.DateTime).LastOrDefault();
+
+            if (lastSkip is { Start: not null, End: not null })
+                nextRunTime = new DateTimeOffset(lastSkip.End.Value.AddDays(1), new TimeOnly(0, 0, 0), TimeSpan.Zero);
+            else if (lastSkip.Date.HasValue)
+                nextRunTime = new DateTimeOffset(lastSkip.Date.Value.AddDays(1), new TimeOnly(0, 0, 0), TimeSpan.Zero);
+
+            var next = expression.GetNextOccurrence(nextRunTime, TimeZoneInfo.Local);
+
+            if (!next.HasValue)
+                return result;
+
+            nextRunTime = next.Value;
+
+            if (!data.Filter(nextRunTime.DateTime).Any())
+                continue;
+
+            result.Add(nextRunTime);
+            nextRunTime = nextRunTime.AddMinutes(1);
+
+        } while (result.Count < depth);
+
+        return result;
+    }
+}