first commit

Services/Interfaces/IAuroraService.cs

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+using HanaToolbox.Config;
+
+namespace HanaToolbox.Services.Interfaces;
+
+public interface IAuroraService
+{
+    Task RunAsync(AuroraConfig config, HanaConfig hana, string sid, CancellationToken ct = default);
+}

Services/Interfaces/IBackupService.cs

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+using HanaToolbox.Config;
+
+namespace HanaToolbox.Services.Interfaces;
+
+public interface IBackupService
+{
+    Task RunAsync(BackupConfig config, HanaConfig hana, string sid, CancellationToken ct = default);
+}

Services/Interfaces/ICleanerService.cs

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+using HanaToolbox.Config;
+
+namespace HanaToolbox.Services.Interfaces;
+
+public interface ICleanerService
+{
+    Task RunAsync(CleanerConfig config, CancellationToken ct = default);
+}

Services/Interfaces/IFirewallService.cs

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+using HanaToolbox.Config;
+
+namespace HanaToolbox.Services.Interfaces;
+
+public interface IFirewallService
+{
+    /// <summary>Applies the saved firewall config non-interactively (cron mode).</summary>
+    Task ApplyAsync(FirewallConfig config, CancellationToken ct = default);
+}

Services/Interfaces/IHdbClientLocator.cs

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+namespace HanaToolbox.Services.Interfaces;
+
+public interface IHdbClientLocator
+{
+    /// <summary>Returns the resolved path to hdbsql. Throws if not found.</summary>
+    string LocateHdbsql(string? configuredPath, string sid, string instanceNumber);
+
+    /// <summary>Returns the resolved path to hdbuserstore. Throws if not found.</summary>
+    string LocateHdbuserstore(string? configuredPath, string sid, string instanceNumber);
+}

Services/Interfaces/IKeyManagerService.cs

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+namespace HanaToolbox.Services.Interfaces;
+
+public interface IKeyManagerService
+{
+    Task<bool> CreateKeyAsync(
+        string keyName, string connectionString,
+        string user, string password,
+        string sid, CancellationToken ct = default);
+
+    Task<bool> DeleteKeyAsync(string keyName, string sid, CancellationToken ct = default);
+
+    Task<IReadOnlyList<string>> ListKeysAsync(string sid, CancellationToken ct = default);
+
+    Task<bool> TestKeyAsync(string hdbsqlPath, string keyName, string sid, CancellationToken ct = default);
+}

Services/Interfaces/IMonitorService.cs

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+using HanaToolbox.Config;
+
+namespace HanaToolbox.Services.Interfaces;
+
+public interface IMonitorService
+{
+    Task RunAsync(MonitorConfig config, HanaConfig hana, string sid, CancellationToken ct = default);
+}

Services/Interfaces/IMonitorStateService.cs

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+namespace HanaToolbox.Services.Interfaces;
+
+public interface IMonitorStateService
+{
+    string? GetState(string key);
+    void SetState(string key, string value);
+}

Services/Interfaces/INotificationService.cs

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+namespace HanaToolbox.Services.Interfaces;
+
+public interface INotificationService
+{
+    Task SendAsync(string title, string message, CancellationToken ct = default);
+}

Services/Interfaces/IProcessRunner.cs

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+namespace HanaToolbox.Services.Interfaces;
+
+public sealed record ProcessResult(int ExitCode, string StdOut, string StdErr)
+{
+    public bool Success => ExitCode == 0;
+}
+
+public interface IProcessRunner
+{
+    Task<ProcessResult> RunAsync(
+        string executable, string[] args,
+        CancellationToken ct = default);
+}

Services/Interfaces/IUserSwitcher.cs

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+using HanaToolbox.Services.Interfaces;
+
+namespace HanaToolbox.Services.Interfaces;
+
+public interface IUserSwitcher
+{
+    /// <summary>
+    /// Executes a shell command string as &lt;sid&gt;adm using `su - &lt;sid&gt;adm -c`.
+    /// If already running as &lt;sid&gt;adm, runs the command directly.
+    /// </summary>
+    Task<ProcessResult> RunAsAsync(
+        string sid, string shellCommand,
+        CancellationToken ct = default);
+}