Create a strategy to handle the local inputs

Author: pBouillon

src/AdventOfCode.Commons/AdventOfCode.Commons.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net7.0</TargetFramework>
@@ -8,6 +8,14 @@
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <LangVersion>preview</LangVersion>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
+    <LangVersion>preview</LangVersion>
+  </PropertyGroup>
+
   <ItemGroup>
     <PackageReference Include="FluentAssertions" Version="6.8.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />

src/AdventOfCode.Commons/Input/IPuzzleInput.cs

@@ -0,0 +1,6 @@
+namespace AdventOfCode.Commons.Input;
+
+public interface IPuzzleInputReaderStrategy
+{
+    IEnumerable<string> ReadInput();
+}

src/AdventOfCode.Commons/Input/LocalPuzzleInputReaderStrategy.cs

@@ -0,0 +1,9 @@
+namespace AdventOfCode.Commons.Input;
+
+public class LocalPuzzleInputReaderStrategy : IPuzzleInputReaderStrategy
+{
+    public required string InputPath { get; init; }
+
+    public IEnumerable<string> ReadInput()
+        => File.ReadAllLines(InputPath);
+}

src/AdventOfCode.Commons/Solver.cs

@@ -1,4 +1,6 @@
-namespace AdventOfCode.Commons;
+using AdventOfCode.Commons.Input;
+
+namespace AdventOfCode.Commons;
 
 /// <summary>
 /// Represent the solver used for a given day
@@ -13,31 +15,41 @@
 /// </typeparam>
 public abstract class Solver<TInput, TResult>
 {
-    /// <summary>
-    /// The path to the input file (ex: <c>"day1/input.txt"</c>)
-    /// </summary>
-    protected abstract string InputPath { get; }
+    public readonly Lazy<TInput> Input;
+
+    private Solver(IPuzzleInputReaderStrategy puzzleInputReader)
+    {
+        Input = new Lazy<TInput>(() =>
+        {
+            var content = puzzleInputReader.ReadInput();
+            return ParseInput(content);
+        });
+    }
 
-    public readonly TInput Input;
+    protected Solver(string inputPath)
+        : this(new LocalPuzzleInputReaderStrategy { InputPath = inputPath }) { }
+
+    protected Solver(int year, int day)
+        : this(new RemotePuzzleInputReaderStrategy { Year = year, Day = day }) { }
 
-    protected Solver()
-        => Input = ReadInput(InputPath);
 
     /// <summary>
-    /// Logic for the solution of the first part of the puzzle
+    /// Parse the input file and convert it to <typeparamref name="TInput"/>
+    /// for it to be used as the input of the <see cref="PartOne(TInput)"/>
+    /// and <see cref="PartTwo(TInput)"/>
     /// </summary>
     /// 
-    /// <param name="input">
-    /// The digested puzzle input
+    /// <param name="inputPath">
+    /// The path of your puzzle input
     /// </param>
     /// 
     /// <returns>
-    /// The puzzle's solution
+    /// The digested input
     /// </returns>
-    public abstract TResult PartOne(TInput input);
+    public abstract TInput ParseInput(IEnumerable<string> input);
 
     /// <summary>
-    /// Logic for the solution of the second part of the puzzle
+    /// Logic for the solution of the first part of the puzzle
     /// </summary>
     /// 
     /// <param name="input">
@@ -47,20 +59,18 @@ protected Solver()
     /// <returns>
     /// The puzzle's solution
     /// </returns>
-    public abstract TResult PartTwo(TInput input);
+    public abstract TResult PartOne(TInput input);
 
     /// <summary>
-    /// Parse the input file and convert it to <typeparamref name="TInput"/>
-    /// for it to be used as the input of the <see cref="PartOne(TInput)"/>
-    /// and <see cref="PartTwo(TInput)"/>
+    /// Logic for the solution of the second part of the puzzle
     /// </summary>
     /// 
-    /// <param name="inputPath">
-    /// The path of your puzzle input
+    /// <param name="input">
+    /// The digested puzzle input
     /// </param>
     /// 
     /// <returns>
-    /// The digested input
+    /// The puzzle's solution
     /// </returns>
-    public abstract TInput ReadInput(string inputPath);
+    public abstract TResult PartTwo(TInput input);
 }

src/AdventOfCode.Commons/TestEngine.cs

@@ -85,7 +85,7 @@ public void PartOneSolutionTest()
     {
         var input = _solver.Input;
 
-        var result = _solver.PartOne(input);
+        var result = _solver.PartOne(input.Value);
 
         result.Should().Be(PartOne.Solution);
     }
@@ -111,7 +111,7 @@ public void PartTwoSolutionTest()
     {
         var input = _solver.Input;
 
-        var result = _solver.PartTwo(input);
+        var result = _solver.PartTwo(input.Value);
 
         result.Should().Be(PartTwo.Solution);
     }

src/AdventOfCode.Usage/AdventOfCode.Usage.csproj

@@ -26,7 +26,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <None Update="input.txt">
+    <None Update="WithLocalInput\input.txt">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
   </ItemGroup>

src/AdventOfCode.Usage/Solver.cs …entOfCode.Usage/WithLocalInput/Solver.cssrc/AdventOfCode.Usage/Solver.cs renamed to src/AdventOfCode.Usage/WithLocalInput/Solver.cs src/AdventOfCode.Usage/Solver.cs renamed to src/AdventOfCode.Usage/WithLocalInput/Solver.cs

@@ -1,6 +1,6 @@
 using AdventOfCode.Commons;
 
-namespace AdventOfCode.Usage;
+namespace AdventOfCode.Usage.WithLocalInput;
 
 /// <summary>
 /// Example of how to use the <see cref="Solver{TInput, TResult}"/> for a simple puzzle
@@ -13,17 +13,14 @@ namespace AdventOfCode.Usage;
 /// </summary>
 public class Solver : Solver<int[], int>
 {
-    protected override string InputPath => "input.txt";
+    public Solver() : base(inputPath: "WithLocalInput/input.txt") { }
 
     public override int PartOne(int[] input)
         => input.Max();
 
     public override int PartTwo(int[] input)
         => input.Sum();
 
-    public override int[] ReadInput(string inputPath)
-        => File
-            .ReadAllLines(inputPath)
-            .Select(int.Parse)
-            .ToArray();
+    public override int[] ParseInput(IEnumerable<string> input)
+        => input.Select(int.Parse).ToArray();
 }

src/AdventOfCode.Usage/SolverTest.cs …fCode.Usage/WithLocalInput/SolverTest.cssrc/AdventOfCode.Usage/SolverTest.cs renamed to src/AdventOfCode.Usage/WithLocalInput/SolverTest.cs src/AdventOfCode.Usage/SolverTest.cs renamed to src/AdventOfCode.Usage/WithLocalInput/SolverTest.cs

@@ -1,6 +1,6 @@
 using AdventOfCode.Commons;
 
-namespace AdventOfCode.Usage;
+namespace AdventOfCode.Usage.WithLocalInput;
 
 /// <summary>
 /// Example of how to test the <see cref="Solver{TInput, TResult}"/>