Complete GenerateShortCodeHandler, Refactor algorithm of short code G…

…enerater.

src/SwiftLink.Application/Common/Interfaces/IShortCodeGenerator.cs

@@ -5,5 +5,5 @@
 /// </summary>
 public interface IShortCodeGenerator
 {
-    Task<string> GenerateAsync(string originalUrl, CancellationToken cancellationToken = default);
+    string Generate(string originalUrl);
 }

src/SwiftLink.Application/Common/ShortCodeGenerator.cs

@@ -20,11 +20,8 @@ public class TimeBasedShortCodeGenerator : IShortCodeGenerator
     /// <param name="originalUrl">the original link which must be shorted.</param>
     /// <param name="cancellationToken"></param>
     /// <returns></returns>
-    public async Task<string> GenerateAsync(string originalUrl, CancellationToken cancellationToken = default)
-    {
-        var shortCode = $"{DateTimeOffset.UtcNow.ToUnixTimeSeconds()}{GetRandomString(COUNT_OF_RANDOM_NUMBER)}{GetHash(originalUrl)}";
-        return await Task.FromResult(shortCode);
-    }
+    public string Generate(string originalUrl)
+        => $"{DateTimeOffset.UtcNow.ToUnixTimeSeconds()}{GetRandomString(COUNT_OF_RANDOM_NUMBER)}{GetHash(originalUrl)}";
 
     private static string GetRandomString(int length)
     {

src/SwiftLink.Application/UseCases/Links/GenerateCommand/GenerateShortCodeCommand.cs

@@ -0,0 +1,11 @@
+using MediatR;
+
+namespace SwiftLink.Application.UseCases.Links.GenerateCommand;
+
+public record GenerateShortCodeCommand : IRequest<Result<object>>
+{
+    public string Url { get; set; }
+    public string Description { get; set; }
+    public DateTime? ExpirationDate { get; set; }
+    public string Password { get; set; }
+}

src/SwiftLink.Application/UseCases/Links/GenerateCommand/GenerateShortCodeCommandHandler.cs

@@ -0,0 +1,38 @@
+using MediatR;
+using Microsoft.Extensions.Options;
+using SwiftLink.Application.Common.Interfaces;
+
+namespace SwiftLink.Application.UseCases.Links.GenerateCommand;
+
+public class GenerateShortCodeCommandHandler(IApplicationDbContext dbContext,
+                                             ICacheProvider cacheProvider,
+                                             IShortCodeGenerator codeGenerator,
+                                             IOptions<AppSettings> options)
+    : IRequestHandler<GenerateShortCodeCommand, Result<object>>
+{
+    private readonly IApplicationDbContext _dbContext = dbContext;
+    private readonly ICacheProvider _cache = cacheProvider;
+    private readonly IShortCodeGenerator _codeGenerator = codeGenerator;
+    private readonly AppSettings _options = options.Value;
+
+    public async Task<Result<object>> Handle(GenerateShortCodeCommand request, CancellationToken cancellationToken)
+    {
+        var link = new Link()
+        {
+            OriginalUrl = request.Url,
+            Password = request.Password,
+            ShortCode = _codeGenerator.Generate(request.Url),
+            ExpirationDate = request.ExpirationDate is null ? DateTime.Now.AddDays(_options.DefaultExpirationTimeInDays) : request.ExpirationDate.Value,
+            Description = request.Description,
+            SubscriberId = 1
+        };
+
+        _dbContext.Set<Link>().Add(link);
+        var dbResult = await _dbContext.SaveChangesAsync(cancellationToken);
+        if (dbResult.IsFailure)
+            return Result<object>.Failure();
+
+        await _cache.Set(request.Url, link.ShortCode);
+        return Result<object>.Success(link);
+    }
+}

src/SwiftLink.Application/UseCases/Link/GenerateCommand/GenerateShortCodeValidator.cs → src/SwiftLink.Application/UseCases/Links/GenerateCommand/GenerateShortCodeValidator.cs

@@ -1,7 +1,7 @@
 using FluentValidation;
 using SwiftLink.Application.Resources;
 
-namespace SwiftLink.Application.UseCases.Link.GenerateCommand;
+namespace SwiftLink.Application.UseCases.Links.GenerateCommand;
 
 public class GenerateShortCodeValidator : AbstractValidator<GenerateShortCodeCommand>
 {

src/SwiftLink.Presentation/appsettings.Development.json

@@ -1,4 +1,7 @@
 {
+  "ConnectionStrings": {
+    "ApplicationDbContext": "Server=DESKTOP-TVCSFN3\\MHA;Database=SwiftLink;Trusted_Connection=True;Encrypt=false"
+  },
   "AppSettings": {
     "DefaultUrlOnNotFound": "https://agah.com/",
     "DefaultExpirationTimeInDays": "7",
@@ -9,5 +12,6 @@
       "Default": "Information",
       "Microsoft.AspNetCore": "Warning"
     }
-  }
+  },
+  "AllowedHosts": "*"
 }

src/SwiftLink.Presentation/appsettings.json

@@ -1,4 +1,7 @@
 {
+  "ConnectionStrings": {
+    "ApplicationDbContext": "Server=DESKTOP-TVCSFN3\\MHA;Database=SwiftLink;Trusted_Connection=True;Encrypt=false"
+  },
   "AppSettings": {
     "DefaultUrlOnNotFound": "https://agah.com/",
     "DefaultExpirationTimeInDays": "7",