Retrieve full url using short url

Api.LinkShortener/Api.LinkShortener/Api.Domain/DatabaseService/IDatabaseService.cs

@@ -1,10 +1,12 @@
 using Api.Domain.DatabaseService.Models;
+using System.Threading.Tasks;
 
 namespace Api.Domain.DatabaseService
 {
     public interface IDatabaseService
     {
+        string GetFullUrl(long id);
         int GetLinksCount();
-        void WriteLinkInformation(ShortLink link);
+        Task WriteLinkInformationAsync(ShortLink link);
     }
 }

Api.LinkShortener/Api.LinkShortener/Api.Domain/DatabaseService/Queries.cs

@@ -14,8 +14,11 @@ createdDate DATETIME
 
         public static string InsertLink =
             @"INSERT INTO Links (ID, Url, ShortUrl, CreatedDate)
-                (@Id, @Url, @ShortUrl, date('now'));";
+                VALUES (@Id, @Url, @ShortUrl, date('now'));";
 
         public static string RecordsCount = "SELECT COUNT(*) FROM Links;";
+
+        public static string GetFullLink =
+    @"SELECT Url FROM Links WHERE Id = @Id;";
     }
 }

Api.LinkShortener/Api.LinkShortener/Api.Domain/DatabaseService/SqLiteService.cs

@@ -1,4 +1,5 @@
 using System.IO;
+using System.Threading.Tasks;
 using Api.Domain.DatabaseService.Models;
 using Dapper;
 using Microsoft.Data.Sqlite;
@@ -13,23 +14,23 @@ public class SqLiteService : IDatabaseService
         public SqLiteService(IConfiguration configuration)
         {
             _configuration = configuration;
-            
+
             var connectionString = _configuration.GetConnectionString("DefaultConnection");
             _connection = new SqliteConnection(connectionString);
-            
+
             var database = _configuration.GetSection("AppSettings")["DatabaseName"];
             if (!File.Exists(database))
             {
                 CreateDatabase();
             }
         }
-        
-        public void WriteLinkInformation(ShortLink link)
+
+        public async Task WriteLinkInformationAsync(ShortLink link)
         {
             using (_connection)
             {
-                _connection.ExecuteAsync(Queries.InsertLink, link);
-                
+                await _connection.ExecuteAsync(Queries.InsertLink, link);
+
             }
         }
 
@@ -42,6 +43,15 @@ public int GetLinksCount()
             }
         }
 
+        public string GetFullUrl(long id)
+        {
+            using (_connection)
+            {
+                return _connection.ExecuteScalar<string>(Queries.GetFullLink, new { Id = id });
+
+            }
+        }
+
         private void CreateDatabase()
         {
             using (_connection)

Api.LinkShortener/Api.LinkShortener/Api.Domain/LinkShortener/ILinkShortener.cs

@@ -1,7 +1,10 @@
-namespace Api.Domain.LinkShortener
+using System.Threading.Tasks;
+
+namespace Api.Domain.LinkShortener
 {
     public interface ILinkShortener
     {
-        string ShortenLink(string url);
+        string GetFullUrl(string shortUrl);
+        Task<string> ShortenLink(string url);
     }
 }

Api.LinkShortener/Api.LinkShortener/Api.Domain/LinkShortener/LinkShortenerService.cs

@@ -2,6 +2,7 @@
 using Api.Domain.DatabaseService.Models;
 using Api.Domain.UrlHasher;
 using System;
+using System.Threading.Tasks;
 
 namespace Api.Domain.LinkShortener
 {
@@ -15,7 +16,7 @@ public LinkShortenerService(IDatabaseService database, IUrlBaseEncoder encoder)
             _encoder = encoder;
         }
 
-        public string ShortenLink(string url)
+        public async Task<string> ShortenLink(string url)
         {
             var linksCount = _database.GetLinksCount();
             var id = linksCount + 1;
@@ -28,9 +29,18 @@ public string ShortenLink(string url)
                 CreatedDate = DateTime.UtcNow
             };
 
-            _database.WriteLinkInformation(shorUrl);
+            await _database.WriteLinkInformationAsync(shorUrl);
 
             return encodedCount;
         }
+
+        public string GetFullUrl(string shortUrl)
+        {
+            var decodedId = _encoder.DecodeUrl(shortUrl);
+
+            var fullUrl = _database.GetFullUrl(decodedId);
+
+            return fullUrl;
+        }
     }
 }

Api.LinkShortener/Api.LinkShortener/Api.LinkShortener/Controllers/UrlShortenerController.cs

@@ -19,12 +19,20 @@ public UrlShortenerController(ILinkShortener linkShortener)
         }
         // POST api/urlShortener
         [HttpPost]
-        public string ShortenUrl([FromBody] UrlData url)
+        public async Task<string> ShortenUrl([FromBody] UrlData url)
         {
-            var shortUrl = _linkShortener.ShortenLink(url.Url);
+            var shortUrl = await _linkShortener.ShortenLink(url.Url);
             return shortUrl;
         }
 
+        [HttpGet]
+        [Route("{shortUrl}")]
+        public string GetFullUrl(string shortUrl)
+        {
+            var fullUrl = _linkShortener.GetFullUrl(shortUrl);
+            return fullUrl;
+        }
+
         public class UrlData
         {
             public string Url { get; set; }