Tool for enable config created and registered on mcp config (#1459)

* Tool for enable config created and registered on mcp config * fix: Added protection for missing traversal path and windonws syslink path transformation on enable config cmp tool * fix: Fix error to create dstDir if do not exists

Author: FelipeGCaetano

mcp/config/config_enable.go

@@ -0,0 +1,114 @@
+package config
+
+import (
+"context"
+"encoding/json"
+"fmt"
+"os"
+"path/filepath"
+
+"github.com/0xJacky/Nginx-UI/internal/config"
+"github.com/0xJacky/Nginx-UI/internal/helper"
+"github.com/0xJacky/Nginx-UI/internal/nginx"
+"github.com/mark3labs/mcp-go/mcp"
+)
+
+const nginxConfigEnableToolName = "nginx_config_enable"
+
+var nginxConfigEnableTool = mcp.NewTool(
+nginxConfigEnableToolName,
+mcp.WithDescription("Enable a previously created Nginx configuration (creates symlink in sites-enabled)"),
+mcp.WithString("name", mcp.Description("The name of the configuration file to enable")),
+mcp.WithString("base_dir", mcp.Description("The source directory (default: sites-available)")),
+mcp.WithBoolean("overwrite", mcp.Description("Whether to overwrite an existing enabled configuration")),
+)
+
+func handleNginxConfigEnable(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+args := request.GetArguments()
+name := args["name"].(string)
+baseDir := args["base_dir"].(string)
+overwrite := args["overwrite"].(bool)
+
+if name == "" {
+return nil, fmt.Errorf("argument 'name' is required")
+}
+
+// Default to sites-available if base_dir is not provided
+if baseDir == "" {
+baseDir = "sites-available"
+}
+
+// Resolve Source Path (e.g., /etc/nginx/sites-available/my-site)
+// This is the file that must already exist.
+srcDir := nginx.GetConfPath(baseDir)
+srcPath := filepath.Join(srcDir, name)
+
+// Ensure the resolved source path is actually inside the intended directory
+if !helper.IsUnderDirectory(srcPath, srcDir) {
+return nil, config.ErrPathIsNotUnderTheNginxConfDir
+}
+
+// Validate Source Exists
+if _, err := os.Stat(srcPath); err != nil {
+return nil, fmt.Errorf("source configuration file not found at %s: %w", srcPath, err)
+}
+
+sitesEnabledDir := nginx.GetConfPath("sites-enabled")
+dstPath := nginx.GetConfSymlinkPath(filepath.Join(sitesEnabledDir, name))
+
+// Ensure the link we are about to create doesn't point outside sites-enabled
+if !helper.IsUnderDirectory(dstPath, sitesEnabledDir) {
+return nil, config.ErrPathIsNotUnderTheNginxConfDir
+}
+
+// Ensure destination directory exists
+if !helper.FileExists(sitesEnabledDir) {
+if err := os.MkdirAll(sitesEnabledDir, 0755); err != nil {
+return nil, fmt.Errorf("failed to create sites-enabled directory: %w", err)
+}
+}
+
+// Check if Destination Already Exists
+if helper.FileExists(dstPath) {
+if !overwrite {
+return nil, fmt.Errorf("configuration is already enabled (symlink exists at %s)", dstPath)
+}
+// Remove existing symlink/file if overwrite is true
+if err := os.Remove(dstPath); err != nil {
+return nil, fmt.Errorf("failed to remove existing configuration at %s: %w", dstPath, err)
+}
+}
+
+// Create Symlink
+// We link srcPath -> dstPath
+if err := os.Symlink(srcPath, dstPath); err != nil {
+return nil, fmt.Errorf("failed to create symlink: %w", err)
+}
+
+// Test Nginx Configuration
+// As per internal/site/enable.go, we must verify config before reloading
+res := nginx.Control(nginx.TestConfig)
+if res.IsError() {
+// Revert change (remove symlink) if test fails to prevent breaking Nginx
+os.Remove(dstPath)
+return nil, fmt.Errorf("nginx config test failed: %v", res.GetError())
+}
+
+// Reload Nginx
+res = nginx.Control(nginx.Reload)
+if res.IsError() {
+return nil, fmt.Errorf("nginx reload failed: %v", res.GetError())
+}
+
+// Construct Success Response
+result := map[string]string{
+"status": "success",
+"message": "Site enabled and Nginx reloaded successfully",
+"source": srcPath,
+"destination": dstPath,
+}
+jsonResult, _ := json.Marshal(result)
+
+return mcp.NewToolResultText(string(jsonResult)), nil
+
+}

mcp/config/register.go

@@ -7,6 +7,7 @@ import (
 func Init() {
 mcp.AddTool(nginxConfigAddTool, handleNginxConfigAdd)
 mcp.AddTool(nginxConfigBasePathTool, handleNginxConfigBasePath)
+mcp.AddTool(nginxConfigEnableTool, handleNginxConfigEnable)
 mcp.AddTool(nginxConfigGetTool, handleNginxConfigGet)
 mcp.AddTool(nginxConfigHistoryTool, handleNginxConfigHistory)
 mcp.AddTool(nginxConfigListTool, handleNginxConfigList)