Update custom viewer handling in UI configuration to eliminate dependency on generated code (#9637)

* Update custom viewer handling in UI configuration to eliminate dependency on generated code.

* add missing file

* Fix file format

Author: nopcoder

pkg/api/controller.go

@@ -5544,8 +5544,32 @@ func (c *Controller) getUIConfig() *apigen.UIConfig {
 	}
 
 	customViewers := uiConfig.GetCustomViewers()
+	if len(customViewers) == 0 {
+		return &apigen.UIConfig{
+			CustomViewers: nil,
+		}
+	}
+
+	apigenViewers := make([]apigen.CustomViewer, len(customViewers))
+	for i, cv := range customViewers {
+		var extensions *[]string
+		if len(cv.Extensions) > 0 {
+			extensions = &cv.Extensions
+		}
+		var contentTypes *[]string
+		if len(cv.ContentTypes) > 0 {
+			contentTypes = &cv.ContentTypes
+		}
+		apigenViewers[i] = apigen.CustomViewer{
+			Name:         cv.Name,
+			Url:          cv.URL,
+			Extensions:   extensions,
+			ContentTypes: contentTypes,
+		}
+	}
+
 	return &apigen.UIConfig{
-		CustomViewers: &customViewers,
+		CustomViewers: &apigenViewers,
 	}
 }
 

pkg/api/params/customviewer.go

@@ -0,0 +1,9 @@
+package params
+
+// CustomViewer defines a custom viewer configuration
+type CustomViewer struct {
+	Name         string
+	URL          string
+	Extensions   []string
+	ContentTypes []string
+}

pkg/config/config.go

@@ -12,7 +12,6 @@ import (
 	"github.com/go-viper/mapstructure/v2"
 	"github.com/mitchellh/go-homedir"
 	"github.com/spf13/viper"
-	"github.com/treeverse/lakefs/pkg/api/apigen"
 	apiparams "github.com/treeverse/lakefs/pkg/api/params"
 	blockparams "github.com/treeverse/lakefs/pkg/block/params"
 	"github.com/treeverse/lakefs/pkg/logging"
@@ -447,7 +446,7 @@ type AuthConfig interface {
 type UIConfig interface {
 	IsUIEnabled() bool
 	GetSnippets() []apiparams.CodeSnippet
-	GetCustomViewers() []apigen.CustomViewer
+	GetCustomViewers() []apiparams.CustomViewer
 }
 
 // BaseConfig - Output struct of configuration, used to validate.  If you read a key using a viper accessor
@@ -834,6 +833,6 @@ func BuildCodeSnippets(s []UISnippet) []apiparams.CodeSnippet {
 	return snippets
 }
 
-func (u *UI) GetCustomViewers() []apigen.CustomViewer {
+func (u *UI) GetCustomViewers() []apiparams.CustomViewer {
 	return nil
 }