chore: update project structure with contracts and services for CaddyManager, including configuration and Docker integration

CaddyManager.Services/Caddy/CaddyConfigurationParsingService.cs

@@ -0,0 +1,83 @@
+using System.Text.RegularExpressions;
+using CaddyManager.Contracts.Caddy;
+
+namespace CaddyManager.Services.Caddy;
+
+/// <inheritdoc />
+public partial class CaddyConfigurationParsingService: ICaddyConfigurationParsingService
+{
+    /// <summary>
+    /// Regex to help parse hostnames from a Caddyfile.
+    /// </summary>
+    /// <returns></returns>
+    [GeneratedRegex(@"(?m)^[\w.-]+(?:\s*,\s*[\w.-]+)*(?=\s*\{)", RegexOptions.Multiline)]
+    private static partial Regex HostnamesRegex();
+    
+    /// <summary>
+    /// Regex to help parse hostnames being used in reverse proxy directives.
+    /// </summary>
+    /// <returns></returns>
+    [GeneratedRegex(@"(?m)reverse_proxy .*", RegexOptions.Multiline)]
+    private static partial Regex ReverseProxyRegex();
+
+    /// <inheritdoc />
+    public List<string> GetHostnamesFromCaddyfileContent(string caddyfileContent)
+    {
+        var hostnamesRegex = HostnamesRegex();
+        var matches = hostnamesRegex.Matches(caddyfileContent);
+        var hostnames = new List<string>();
+        foreach (Match match in matches)
+        {
+            // Split the matched string by commas and trim whitespace
+            var splitHostnames = match.Value.Split(',')
+                .Select(h => h.Trim())
+                .Where(h => !string.IsNullOrWhiteSpace(h))
+                .ToList();
+
+            hostnames.AddRange(splitHostnames);
+        }
+        // Remove duplicates and return the list
+        return hostnames.Distinct().ToList();
+    }
+
+    /// <inheritdoc />
+    public string GetReverseProxyTargetFromCaddyfileContent(string caddyfileContent)
+    {
+        var reverseProxyRegex = ReverseProxyRegex();
+        var match = reverseProxyRegex.Match(caddyfileContent);
+        if (!match.Success) return string.Empty;
+
+        var parts = match.Value.TrimEnd('}').Trim().Split(' ');
+        var targetPart = parts.LastOrDefault(string.Empty);
+        if (string.IsNullOrEmpty(targetPart)) return string.Empty;
+
+        var targetComponents = targetPart.Split(':');
+        if (targetComponents.Length <= 1) return targetPart;
+
+        // Handle cases like http://backend:9000, 192.168.1.100:3000
+        return targetComponents[0];
+    }
+
+    /// <inheritdoc />
+    public List<int> GetReverseProxyPortsFromCaddyfileContent(string caddyfileContent)
+    {
+        var reverseProxyRegex = ReverseProxyRegex();
+        var matches = reverseProxyRegex.Matches(caddyfileContent);
+        var results = new List<int>();
+
+        foreach (Match match in matches)
+        {
+            var parts = match.Value.TrimEnd('}').Trim().Split(' ');
+            var targetPart = parts.LastOrDefault(string.Empty);
+            if (string.IsNullOrEmpty(targetPart)) continue;
+
+            var targetComponents = targetPart.Split(':');
+            if (targetComponents.Length > 1 && int.TryParse(targetComponents.Last(), out int port))
+            {
+                results.Add(port);
+            }
+        }
+
+        return results.Distinct().ToList();
+    }
+}