Initial commit.

Wino.Core/Services/TokenService.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Threading.Tasks;
+using Wino.Core.Domain.Entities;
+
+namespace Wino.Core.Services
+{
+    public interface ITokenService
+    {
+        Task<TokenInformation> GetTokenInformationAsync(Guid accountId);
+        Task SaveTokenInformationAsync(Guid accountId, TokenInformation tokenInformation);
+    }
+
+    public class TokenService : BaseDatabaseService, ITokenService
+    {
+        public TokenService(IDatabaseService databaseService) : base(databaseService) { }
+
+        public Task<TokenInformation> GetTokenInformationAsync(Guid accountId)
+            => Connection.Table<TokenInformation>().FirstOrDefaultAsync(a => a.AccountId == accountId);
+
+        public async Task SaveTokenInformationAsync(Guid accountId, TokenInformation tokenInformation)
+        {
+            // Delete all tokens for this account.
+            await Connection.Table<TokenInformation>().DeleteAsync(a => a.AccountId == accountId);
+
+            // Save new token info to the account.
+            tokenInformation.AccountId = accountId;
+
+            await Connection.InsertOrReplaceAsync(tokenInformation);
+        }
+    }
+}