添加项目文件。

LeetCodeSharp.Fetcher/Models/Problem.cs

@@ -0,0 +1,79 @@
+using System.Text;
+
+namespace LeetCodeSharp.Fetcher.Models;
+
+internal class Problem
+{
+    private const string Template = """
+                                    /**
+                                    * [__PROBLEM_ID__] __PROBLEM_TITLE__
+                                    */
+                                    __EXTRA_USE__
+                                    
+                                    namespace LeetCodeSharp.Problems
+                                    {
+
+                                        // Submission codes start here
+                                    
+                                        __PROBLEM_CODE__
+                                    
+                                        // Submission codes end here
+                                    }
+                                    """;
+
+    public required string Title { get; set; }
+
+    public required string TitleSlug { get; set; }
+
+    public required string Content { get; set; }
+
+    public required List<CodeDefinition> CodeDefinition { get; set; }
+
+    public required uint QuestionId { get; set; }
+
+    public required string ReturnType { get; set; }
+
+    public string GetFilename()
+    {
+        return $"p{QuestionId}_{TitleSlug.Replace('-', '_')}.cs";
+    }
+
+    public string GetFileContent()
+    {
+        var code = CodeDefinition.FirstOrDefault(c => c.Value == "csharp")
+            ?? throw new Exception("Target question has no C# version.");
+
+        string template;
+        if (code.DefaultCode.Contains("public class ListNode")
+            || code.DefaultCode.Contains("public class Point")
+            || code.DefaultCode.Contains("public class TreeNode")
+            || code.DefaultCode.Contains("public class Node"))
+        {
+            template = Template.Replace("__EXTRA_USE__", "using LeetCodeSharp.Utils;");
+        }
+        else
+        {
+            template = Template.Replace("__EXTRA_USE__", string.Empty);
+        }
+
+        return template.Replace("__PROBLEM_ID__", Title)
+            .Replace("__PROBLEM_TITLE__", QuestionId.ToString())
+            .Replace("__PROBLEM_CODE__", code.DefaultCode);
+    }
+
+    public override string ToString()
+    {
+        var builder = new StringBuilder();
+
+        builder.Append("Title:").Append(Title).Append("\r\n");
+        builder.Append("Title slug: ").Append(TitleSlug).Append("\r\n");
+        builder.Append("Code definitions: \r\n");
+        foreach (var definition in CodeDefinition)
+        {
+            builder.Append('\t').Append(definition.Value).Append("\r\n");
+        }
+        builder.Append("Return type: ").Append(ReturnType).Append("\r\n");
+
+        return builder.ToString();
+    }
+}