add Day.RunFromArgs to remove duplicate functionality in each year

AOC.Common/AOC.Common.csproj

@@ -7,5 +7,6 @@
     <ItemGroup>
         <Using Include="System.Diagnostics" />
         <Using Include="System.Numerics" />
+        <Using Include="System.Reflection" />
     </ItemGroup>
 </Project>

AOC.Common/Day.cs

@@ -10,7 +10,7 @@ public abstract class Day
     }
 
     public static bool UseTestInput { get; set; }
-    
+
     public int Year { get; }
     public int DayNumber { get; }
     public string PuzzleName { get; }
@@ -25,9 +25,9 @@ public abstract class Day
     public abstract object Part1();
     public abstract object Part2();
 
-    public void AllParts(bool verbose = true)
+    private void AllParts(bool verbose = true)
     {
-        Console.WriteLine($"Day {DayNumber,2}: {PuzzleName}");
+        Console.WriteLine($"{Year} Day {DayNumber,2}: {PuzzleName}");
         var s = Stopwatch.StartNew();
         var part1 = Part1();
         s.Stop();
@@ -44,4 +44,30 @@ public abstract class Day
 
         Console.WriteLine();
     }
-}
+
+    public static void RunFromArgs(string[] args)
+    {
+        var days = Assembly.GetEntryAssembly()?.GetTypes()
+            .Where(t => t.BaseType == typeof(Day))
+            .Select(t => (Activator.CreateInstance(t) as Day)!)
+            .OrderBy(d => d.DayNumber)
+            .ToList();
+
+        if (days == null || !days.Any())
+        {
+            throw new ApplicationException("no days found");
+        }
+            
+
+        if (args.Length == 1 && int.TryParse(args[0], out var dayNum))
+        {
+            var day = days.FirstOrDefault(d => d.DayNumber == dayNum);
+            if (day != null) day.AllParts();
+            else Console.WriteLine($"Day {dayNum} invalid or not yet implemented");
+        }
+        else
+        {
+            foreach (var d in days) d.AllParts();
+        }
+    }
+}

AOC2019/Program.cs

@@ -1,15 +1 @@
-var days = Assembly.GetExecutingAssembly().GetTypes()
+Day.RunFromArgs(args);
-    .Where(t => t.BaseType == typeof(Day))
-    .Select(t => (Activator.CreateInstance(t) as Day)!)
-    .OrderBy(d => d.DayNumber);
-
-if (args.Length == 1 && int.TryParse(args[0], out var dayNum))
-{
-    var day = days.FirstOrDefault(d => d.DayNumber == dayNum);
-    if (day != null) day.AllParts();
-    else Console.WriteLine($"Day {dayNum} invalid or not yet implemented");
-}
-else
-{
-    foreach (var d in days) d.AllParts();
-}

AOC2020/Program.cs

@@ -1,15 +1 @@
-var days = Assembly.GetExecutingAssembly().GetTypes()
+Day.RunFromArgs(args);
-    .Where(t => t.BaseType == typeof(Day))
-    .Select(t => (Activator.CreateInstance(t) as Day)!)
-    .OrderBy(d => d.DayNumber);
-
-if (args.Length == 1 && int.TryParse(args[0], out var dayNum))
-{
-    var day = days.FirstOrDefault(d => d.DayNumber == dayNum);
-    if (day != null) day.AllParts();
-    else Console.WriteLine($"Day {dayNum} invalid or not yet implemented");
-}
-else
-{
-    foreach (var d in days) d.AllParts();
-}

AOC2021/Program.cs

@@ -1,15 +1 @@
-var days = Assembly.GetExecutingAssembly().GetTypes()
+Day.RunFromArgs(args);
-    .Where(t => t.BaseType == typeof(Day))
-    .Select(t => (Activator.CreateInstance(t) as Day)!)
-    .OrderBy(d => d.DayNumber);
-
-if (args.Length == 1 && int.TryParse(args[0], out var dayNum))
-{
-    var day = days.FirstOrDefault(d => d.DayNumber == dayNum);
-    if (day != null) day.AllParts();
-    else Console.WriteLine($"Day {dayNum} invalid or not yet implemented");
-}
-else
-{
-    foreach (var d in days) d.AllParts();
-}

AOC2022/Program.cs

@@ -1,15 +1 @@
-var days = Assembly.GetExecutingAssembly().GetTypes()
+Day.RunFromArgs(args);
-    .Where(t => t.BaseType == typeof(Day))
-    .Select(t => (Activator.CreateInstance(t) as Day)!)
-    .OrderBy(d => d.DayNumber);
-
-if (args.Length == 1 && int.TryParse(args[0], out var dayNum))
-{
-    var day = days.FirstOrDefault(d => d.DayNumber == dayNum);
-    if (day != null) day.AllParts();
-    else Console.WriteLine($"Day {dayNum} invalid or not yet implemented");
-}
-else
-{
-    foreach (var d in days) d.AllParts();
-}