added result check to tui

Signed-off-by: quobix <[email protected]>

tui/build_tree.go

@@ -18,12 +18,18 @@ import (
 
 func BuildTreeView(commit *model.Commit) *tview.TreeView {
 	root := BuildTreeModel(commit.Document, commit.Changes)
+	if root == nil {
+		return nil
+	}
 	tree := tview.NewTreeView()
 	tree.SetRoot(root).SetCurrentNode(root)
 	return tree
 }
 
 func BuildTreeModel(doc libopenapi.Document, changes *whatChangedModel.DocumentChanges) *tview.TreeNode {
+	if doc == nil {
+		return nil
+	}
 	root := tview.NewTreeNode(doc.GetSpecInfo().SpecType).SetColor(CYAN_CELL_COLOR)
 	if changes != nil {
 		buildTreeNode(root, changes)

tui/main_console.go

@@ -8,6 +8,7 @@ import (
 	"github.com/gdamore/tcell/v2"
 	whatChanged "github.com/pb33f/libopenapi/what-changed/model"
 	"github.com/pb33f/openapi-changes/model"
+	"github.com/pterm/pterm"
 	"github.com/rivo/tview"
 )
 
@@ -21,6 +22,10 @@ func BuildApplication(commitHistory []*model.Commit, version string) *tview.Appl
 
 	// tree view
 	tree := BuildTreeView(commit)
+	if tree == nil {
+		pterm.Error.Println("Cannot render console, no results were extracted.")
+		return nil
+	}
 
 	// build table filled with commit / history
 	table := BuildCommitTable(commitHistory)