Merge pull request #184 from gnh1201/dev

Add some code for #183 (Auto completion)

WelsonJS.Toolkit/WelsonJS.Launcher/ExecutablesCollector.cs

@@ -0,0 +1,122 @@
+using Microsoft.Win32;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Text.RegularExpressions;
+
+namespace WelsonJS.Launcher
+{
+    public class ExecutablesCollector
+    {
+        private List<string> executables = new List<string>();
+
+        public ExecutablesCollector()
+        {
+            executables.AddRange(GetInstalledSoftwareExecutables());
+            executables.AddRange(GetExecutablesFromPath());
+        }
+
+        public List<string> GetExecutables()
+        {
+            return executables;
+        }
+
+        private List<string> GetInstalledSoftwareExecutables()
+        {
+            List<string> executables = new List<string>();
+            string registryKey = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall";
+
+            using (RegistryKey key = Registry.LocalMachine.OpenSubKey(registryKey))
+            {
+                if (key != null)
+                {
+                    foreach (string subKeyName in key.GetSubKeyNames())
+                    {
+                        using (RegistryKey subKey = key.OpenSubKey(subKeyName))
+                        {
+                            string installLocation = subKey?.GetValue("InstallLocation") as string;
+                            string uninstallString = subKey?.GetValue("UninstallString") as string;
+
+                            List<string> executablePaths = FindExecutables(installLocation, uninstallString);
+                            executables.AddRange(executablePaths);
+                        }
+                    }
+                }
+            }
+
+            return executables;
+        }
+
+        private List<string> FindExecutables(string installLocation, string uninstallString)
+        {
+            List<string> executables = new List<string>();
+
+            if (!string.IsNullOrEmpty(installLocation) && Directory.Exists(installLocation))
+            {
+                try
+                {
+                    List<string> executableFiles = Directory.GetFiles(installLocation, "*.exe", SearchOption.AllDirectories)
+                                            .OrderByDescending(f => new FileInfo(f).Length)
+                                            .ToList();
+                    executables.AddRange(executableFiles);
+                }
+                catch (Exception ex)
+                {
+                    Debug.WriteLine($"Error enumerating executables in '{installLocation}': {ex}");
+                }
+            }
+
+            if (!string.IsNullOrEmpty(uninstallString))
+            {
+                if (TryParseExecutablePath(uninstallString, out string executablePath))
+                {
+                    executables.Add(executablePath);
+                }
+            }
+
+            return executables;
+        }
+
+        private static bool TryParseExecutablePath(string s, out string path)
+        {
+            Match match = Regex.Match(s, @"(?<=""|^)([a-zA-Z]:\\[^""]+\.exe)", RegexOptions.IgnoreCase);
+
+            if (match.Success)
+            {
+                path = match.Value;
+                return true;
+            }
+
+            path = null;
+            return false;
+        }
+
+        private List<string> GetExecutablesFromPath()
+        {
+            List<string> executables = new List<string>();
+            string pathEnv = Environment.GetEnvironmentVariable("PATH");
+
+            if (!string.IsNullOrEmpty(pathEnv))
+            {
+                foreach (string path in pathEnv.Split(';'))
+                {
+                    if (Directory.Exists(path))
+                    {
+                        try
+                        {
+                            executables.AddRange(Directory.GetFiles(path, "*.exe", SearchOption.TopDirectoryOnly));
+                        }
+                        catch (Exception ex)
+                        {
+                            Debug.WriteLine($"Error enumerating executables in '{path}': {ex}");
+                        }
+                    }
+                }
+            }
+
+            return executables;
+        }
+    }
+}

WelsonJS.Toolkit/WelsonJS.Launcher/ResourceServer.cs

@@ -1,12 +1,15 @@
 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
+using System.Linq;
 using System.Net;
 using System.Reflection;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Forms;
+using System.Xml.Linq;
 
 namespace WelsonJS.Launcher
 {
@@ -18,6 +21,7 @@ namespace WelsonJS.Launcher
         private bool _isRunning;
         private string _prefix;
         private string _resourceName;
+        private ExecutablesCollector _executablesCollector;
 
         public ResourceServer(string prefix, string resourceName)
         {
@@ -25,6 +29,7 @@ namespace WelsonJS.Launcher
             _listener = new HttpListener();
             _listener.Prefixes.Add(prefix);
             _resourceName = resourceName;
+            _executablesCollector = new ExecutablesCollector();
         }
 
         public string GetPrefix()
@@ -81,15 +86,82 @@ namespace WelsonJS.Launcher
         {
             string path = context.Request.Url.AbsolutePath.TrimStart('/');
 
+            // Serve the favicon.ico file
             if ("favicon.ico".Equals(path, StringComparison.OrdinalIgnoreCase))
             {
                 ServeResource(context, GetResource("favicon"), "image/x-icon");
                 return;
             }
 
+            // Serve the code completion (word suggestion)
+            if (path.StartsWith("completion/", StringComparison.OrdinalIgnoreCase))
+            {
+                ServeCompletion(context, path.Substring("completion/".Length));
+                return;
+            }
+
+            // Serve a resource
             ServeResource(context, GetResource(_resourceName), "text/html");
         }
 
+        private void ServeCompletion(HttpListenerContext context, string word)
+        {
+            int statusCode = 200;
+
+            try
+            {
+                List<string> executables = _executablesCollector.GetExecutables();
+
+                CompletionItem[] completionItems = executables
+                    .Where(exec => exec.IndexOf(word, 0, StringComparison.OrdinalIgnoreCase) > -1)
+                    .Take(100) // Limit results to prevent excessive response sizes
+                    .Select(exec => new CompletionItem
+                    {
+                        Label = Path.GetFileName(exec),
+                        Kind = "Text",
+                        Documentation = "An executable file",
+                        InsertText = exec
+                    })
+                    .ToArray();
+
+                XElement response = new XElement("suggestions",
+                    completionItems.Select(item => new XElement("item",
+                        new XElement("label", item.Label),
+                        new XElement("kind", item.Kind),
+                        new XElement("documentation", item.Documentation),
+                        new XElement("insertText", item.InsertText)
+                    ))
+                );
+
+                byte[] data = Encoding.UTF8.GetBytes(
+                    "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n" +
+                    response.ToString()
+                );
+
+                context.Response.StatusCode = statusCode;
+                context.Response.ContentType = "application/xml";
+                context.Response.ContentLength64 = data.Length;
+                using (Stream outputStream = context.Response.OutputStream)
+                {
+                    outputStream.Write(data, 0, data.Length);
+                }
+            }
+            catch (Exception ex)
+            {
+                byte[] errorData = Encoding.UTF8.GetBytes(
+                    "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n" +
+                    $"<error>Failed to process completion request. {ex.Message}</error>"
+                );
+                context.Response.StatusCode = 500;
+                context.Response.ContentType = "application/xml";
+                context.Response.ContentLength64 = errorData.Length;
+                using (Stream outputStream = context.Response.OutputStream)
+                {
+                    outputStream.Write(errorData, 0, errorData.Length);
+                }
+            }
+        }
+
         private void ServeResource(HttpListenerContext context, byte[] data, string mimeType = "text/html")
         {
             int statusCode = 200;
@@ -105,8 +177,10 @@ namespace WelsonJS.Launcher
             context.Response.StatusCode = statusCode;
             context.Response.ContentType = mimeType;
             context.Response.ContentLength64 = data.Length;
-            context.Response.OutputStream.Write(data, 0, data.Length);
-            context.Response.OutputStream.Close();
+            using (Stream outputStream = context.Response.OutputStream)
+            {
+                outputStream.Write(data, 0, data.Length);
+            }
         }
 
         private byte[] GetResource(string resourceName)
@@ -159,4 +233,12 @@ namespace WelsonJS.Launcher
             }
         }
     }
+
+    public class CompletionItem
+    {
+        public string Label { get; set; }
+        public string Kind { get; set; }
+        public string Documentation { get; set; }
+        public string InsertText { get; set; }
+    }
 }

WelsonJS.Toolkit/WelsonJS.Launcher/WelsonJS.Launcher.csproj

@@ -68,6 +68,7 @@
     </Reference>
     <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Xml" />
+    <Reference Include="System.Xml.Linq" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="EnvForm.cs">
@@ -76,6 +77,7 @@
     <Compile Include="EnvForm.Designer.cs">
       <DependentUpon>EnvForm.cs</DependentUpon>
     </Compile>
+    <Compile Include="ExecutablesCollector.cs" />
     <Compile Include="InstancesForm.cs">
       <SubType>Form</SubType>
     </Compile>