拆分代码7

shell/Commands/Utility/CalendarCommand.cs

@@ -0,0 +1,69 @@
+using System;
+
+namespace CMLeonOS.Commands.Utility
+{
+    public static class CalendarCommand
+    {
+        public static void ShowCalendar(string args)
+        {
+            int year = DateTime.Now.Year;
+            int month = DateTime.Now.Month;
+            
+            if (!string.IsNullOrEmpty(args))
+            {
+                string[] parts = args.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
+                
+                if (parts.Length >= 1)
+                {
+                    if (int.TryParse(parts[0], out int m) && m >= 1 && m <= 12)
+                    {
+                        month = m;
+                    }
+                }
+                
+                if (parts.Length >= 2)
+                {
+                    if (int.TryParse(parts[1], out int y) && y >= 1 && y <= 9999)
+                    {
+                        year = y;
+                    }
+                }
+            }
+            
+            DateTime firstDay = new DateTime(year, month, 1);
+            int daysInMonth = DateTime.DaysInMonth(year, month);
+            DayOfWeek startDayOfWeek = firstDay.DayOfWeek;
+            
+            string[] monthNames = { 
+                "January", "February", "March", "April", "May", "June",
+                "July", "August", "September", "October", "November", "December"
+            };
+            
+            Console.WriteLine($"     {monthNames[month - 1]} {year}");
+            Console.WriteLine("  Su Mo Tu We Th Fr Sa");
+            
+            int dayOfWeek = (int)startDayOfWeek;
+            if (dayOfWeek == 0) dayOfWeek = 7;
+            
+            for (int i = 1; i < dayOfWeek; i++)
+            {
+                Console.Write("   ");
+            }
+            
+            for (int day = 1; day <= daysInMonth; day++)
+            {
+                Console.Write($"{day,2} ");
+                
+                dayOfWeek++;
+                if (dayOfWeek > 7)
+                {
+                    dayOfWeek = 1;
+                    Console.WriteLine();
+                    Console.Write("  ");
+                }
+            }
+            
+            Console.WriteLine();
+        }
+    }
+}