check for existing server name

PiwigoDirectorySync/Commands/PiwigoAddCommand.cs

@@ -2,6 +2,7 @@
 using Microsoft.Extensions.Logging;
 using PiwigoDirectorySync.Infrastructure;
 using PiwigoDirectorySync.Persistence;
+using Spectre.Console;
 using Spectre.Console.Cli;
 
 namespace PiwigoDirectorySync.Commands;
@@ -22,6 +23,13 @@ internal class PiwigoAddCommand : CancellableAsyncCommand<PiwigoAddSettings>
         _logger.LogInformation("Adding piwigo server {SettingsServerName} with user {SettingsUserName} and url {SettingsUrl}", settings.ServerName, settings.UserName,
             settings.Url);
 
+        var count = await _persistenceContext.PiwigoServers.Where(s => s.Name == settings.ServerName).CountAsync(cancellation);
+        if (count > 0)
+        {
+            AnsiConsole.WriteLine($"[maroon]There is already a server with the name {settings.ServerName}[/]");
+            return -1;
+        }
+
         var server = new ServerEntity
         {
             Url = settings.Url,
@@ -34,6 +42,8 @@ internal class PiwigoAddCommand : CancellableAsyncCommand<PiwigoAddSettings>
         _persistenceContext.PiwigoServers.Add(server);
         await _persistenceContext.SaveChangesAsync(cancellation);
 
+        AnsiConsole.WriteLine($"[green]Added server {settings.ServerName} with id {server.Id}[/]");
+
         var piwigoServers = await _persistenceContext.PiwigoServers.ToListAsync(cancellation);
         PiwigoListCommand.PrintServers(piwigoServers);
 

PiwigoDirectorySync/Commands/PiwigoAddSettings.cs

@@ -1,4 +1,5 @@
-using Spectre.Console.Cli;
+using Spectre.Console;
+using Spectre.Console.Cli;
 
 namespace PiwigoDirectorySync.Commands;
 
@@ -11,4 +12,45 @@ internal class PiwigoAddSettings : CommandSettings
 
     [CommandArgument(1, "<RootDirectory>")]
     public string RootDirectory { get; init; } = string.Empty;
+
+    public override ValidationResult Validate()
+    {
+        var baseResult = base.Validate();
+        if (!baseResult.Successful)
+        {
+            return baseResult;
+        }
+
+        if (string.IsNullOrWhiteSpace(ServerName))
+        {
+            return ValidationResult.Error("Please specify a server name");
+        }
+
+        if (string.IsNullOrWhiteSpace(Url))
+        {
+            return ValidationResult.Error("Please specify a server url");
+        }
+
+        if (string.IsNullOrWhiteSpace(UserName))
+        {
+            return ValidationResult.Error("Please specify a valid username for the server");
+        }
+
+        if (string.IsNullOrWhiteSpace(Password))
+        {
+            return ValidationResult.Error("Please specify a password");
+        }
+
+        if (string.IsNullOrWhiteSpace(RootDirectory))
+        {
+            return ValidationResult.Error("Please specify a root directory");
+        }
+
+        if (!Directory.Exists(RootDirectory))
+        {
+            return ValidationResult.Error($"The root directory {RootDirectory} does not exist or is not accessible");
+        }
+
+        return ValidationResult.Success();
+    }
 }