feat: save hosts file

internal/tui/model.go

@@ -40,17 +40,18 @@ const (
 )
 
 type Model struct {
-	list   list.Model
-	detail viewport.Model
-	hosts  *core.HostsFile
-	width  int
-	height int
-	mode   Mode
-	focus  pane
+	list      list.Model
+	detail    viewport.Model
+	hosts     *core.HostsFile
+	hostsPath string
+	width     int
+	height    int
+	mode      Mode
+	focus     pane
 }
 
-// NewModel constructs the TUI model from a parsed HostsFile.
-func NewModel(hf *core.HostsFile) Model {
+// NewModel constructs the TUI model from a parsed HostsFile and its path.
+func NewModel(hf *core.HostsFile, path string) Model {
 	items := make([]list.Item, len(hf.Entries))
 	for i, e := range hf.Entries {
 		items[i] = entryItem{entry: e}
@@ -63,11 +64,12 @@ func NewModel(hf *core.HostsFile) Model {
 	l.SetShowPagination(false)
 
 	m := Model{
-		list:   l,
-		detail: viewport.New(0, 0),
-		hosts:  hf,
-		mode:   ViewMode,
-		focus:  listPane,
+		list:      l,
+		detail:    viewport.New(0, 0),
+		hosts:     hf,
+		hostsPath: path,
+		mode:      ViewMode,
+		focus:     listPane,
 	}
 	m.refreshDetail()
 	return m

internal/tui/update.go

@@ -1,6 +1,10 @@
 package tui
 
 import (
+	"fmt"
+
+	"hosts-go/internal/core"
+
 	tea "github.com/charmbracelet/bubbletea"
 )
 
@@ -24,6 +28,12 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 			} else {
 				m.mode = ViewMode
 			}
+		case "ctrl+s":
+			if m.mode == EditMode && m.hostsPath != "" {
+				if err := core.WriteHostsFile(m.hostsPath, m.hosts); err != nil {
+					fmt.Println("save failed:", err)
+				}
+			}
 		case " ":
 			if m.mode == EditMode {
 				if entry := m.SelectedEntry(); entry != nil {