fix view channels: wrong current channel

issue #11

ui/controller.go

@@ -171,8 +171,8 @@ func (c *controller) OnEnter(g *gocui.Gui, v *gocui.View) error {
 	switch view.Name() {
 	case views.CHANNELS:
 		c.views.SetPrevious(view)
-		_, cy := v.Cursor()
-		err := c.models.SetCurrentChannel(context.Background(), cy)
+		index := c.views.Channels.Index()
+		err := c.models.SetCurrentChannel(context.Background(), index)
 		if err != nil {
 			return err
 		}

ui/models/channels.go

@@ -16,6 +16,10 @@ func (c *Channels) List() []*models.Channel {
 	return c.list
 }
 
+func (c *Channels) Len() int {
+	return len(c.list)
+}
+
 func (c *Channels) Get(index int) *models.Channel {
 	if index < 0 || index > len(c.list)-1 {
 		return nil

ui/views/channels.go

@@ -20,11 +20,16 @@ const (
 )
 
 type Channels struct {
+	index    int
 	columns  *gocui.View
 	view     *gocui.View
 	channels *models.Channels
 }
 
+func (c Channels) Index() int {
+	return c.index
+}
+
 func (c Channels) Name() string {
 	return CHANNELS
 }
@@ -35,10 +40,17 @@ func (c *Channels) Wrap(v *gocui.View) view {
 }
 
 func (c *Channels) CursorDown() error {
+	if c.channels.Len() <= c.index+1 {
+		return nil
+	}
+	c.index++
 	return cursorDown(c.view, 1)
 }
 
 func (c *Channels) CursorUp() error {
+	if c.index > 0 {
+		c.index--
+	}
 	return cursorUp(c.view, 1)
 }