Add src files

src/LibNftables/NftApplyRequest.cs

@@ -0,0 +1,62 @@
+namespace LibNftables;
+
+/// <summary>
+/// Represents an apply/validate request source and execution settings.
+/// </summary>
+public sealed class NftApplyRequest
+{
+    /// <summary>
+    /// Gets or sets ruleset command text source.
+    /// </summary>
+    /// <remarks>Exactly one of <see cref="RulesetText"/> or <see cref="RulesetFilePath"/> must be provided.</remarks>
+    public string? RulesetText { get; set; }
+
+    /// <summary>
+    /// Gets or sets ruleset file path source.
+    /// </summary>
+    /// <remarks>Exactly one of <see cref="RulesetText"/> or <see cref="RulesetFilePath"/> must be provided.</remarks>
+    public string? RulesetFilePath { get; set; }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether execution should run in dry-run mode.
+    /// </summary>
+    public bool DryRun { get; set; }
+
+    /// <summary>
+    /// Gets or sets input parser flags.
+    /// </summary>
+    public NftInputFlags InputFlags { get; set; }
+
+    /// <summary>
+    /// Gets or sets output behavior flags.
+    /// </summary>
+    public NftOutputFlags OutputFlags { get; set; }
+
+    /// <summary>
+    /// Gets or sets debug flags.
+    /// </summary>
+    public NftDebugLevel DebugFlags { get; set; }
+
+    /// <summary>
+    /// Gets or sets optimize flags.
+    /// </summary>
+    public NftOptimizeFlags OptimizeFlags { get; set; }
+
+    /// <summary>
+    /// Creates a request from command text.
+    /// </summary>
+    /// <param name="rulesetText">Ruleset command text.</param>
+    /// <param name="dryRun">Whether the request should run in dry-run mode.</param>
+    /// <returns>A configured request instance.</returns>
+    public static NftApplyRequest FromText(string rulesetText, bool dryRun = false)
+        => new() { RulesetText = rulesetText, DryRun = dryRun };
+
+    /// <summary>
+    /// Creates a request from a file path.
+    /// </summary>
+    /// <param name="rulesetFilePath">Path to file containing ruleset commands.</param>
+    /// <param name="dryRun">Whether the request should run in dry-run mode.</param>
+    /// <returns>A configured request instance.</returns>
+    public static NftApplyRequest FromFile(string rulesetFilePath, bool dryRun = false)
+        => new() { RulesetFilePath = rulesetFilePath, DryRun = dryRun };
+}