refac controller: F1 Help

ui/color/color.go

@@ -13,4 +13,5 @@ var (
 	Cyan    = color.New(color.FgCyan).SprintFunc()
 	CyanBg  = color.New(color.BgCyan, color.FgBlack).SprintFunc()
 	WhiteBg = color.New(color.BgWhite, color.FgBlack).SprintFunc()
+	BlackBg = color.New(color.BgBlack, color.FgWhite).SprintFunc()
 )

ui/controller.go

@@ -96,9 +96,30 @@ func quit(g *gocui.Gui, v *gocui.View) error {
 	return gocui.ErrQuit
 }
 
-func Help(g *gocui.Gui, v *gocui.View) error {
+func (c *controller) Help(g *gocui.Gui, v *gocui.View) error {
 	maxX, maxY := g.Size()
-	return views.SetHelp(g, 0, -1, maxX, maxY)
+	view := c.views.Get(g.CurrentView().Name())
+	if view == nil {
+		return nil
+	}
+
+	if view.Name() != views.HELP {
+		c.views.SetPrevious(view)
+		c.logger.Info("hello")
+		return c.views.Help.Set(g, 0, -1, maxX, maxY)
+	}
+
+	err := g.DeleteView(views.HELP)
+	if err != nil {
+		return err
+	}
+
+	if c.views.Previous != nil {
+		_, err := g.SetCurrentView(c.views.Previous.Name())
+		return err
+	}
+
+	return nil
 }
 
 func (c *controller) setKeyBinding(g *gocui.Gui) error {
@@ -117,7 +138,7 @@ func (c *controller) setKeyBinding(g *gocui.Gui) error {
 		return err
 	}
 
-	err = g.SetKeybinding("", gocui.KeyCtrlH, gocui.ModNone, Help)
+	err = g.SetKeybinding("", gocui.KeyF1, gocui.ModNone, c.Help)
 	if err != nil {
 		return err
 	}

ui/views/channels.go

@@ -21,6 +21,10 @@ type Channels struct {
 	channels *models.Channels
 }
 
+func (c Channels) Name() string {
+	return CHANNELS
+}
+
 func (c *Channels) Set(g *gocui.Gui, x0, y0, x1, y1 int) error {
 	columns, err := g.SetView(CHANNELS_COLUMNS, x0-1, y0, x1+2, y0+2)
 	if err != nil {

ui/views/footer.go

@@ -1,6 +1,12 @@
 package views
 
-import "github.com/jroimartin/gocui"
+import (
+	"fmt"
+
+	"github.com/jroimartin/gocui"
+
+	"github.com/edouardparis/lntop/ui/color"
+)
 
 const (
 	FOOTER = "footer"
@@ -17,7 +23,9 @@ func (f *Footer) Set(g *gocui.Gui, x0, y0, x1, y1 int) error {
 	}
 	v.Frame = false
 	v.BgColor = gocui.ColorCyan
-	v.FgColor = gocui.ColorBlack | gocui.AttrBold
+	v.FgColor = gocui.ColorBlack
+	v.Clear()
+	fmt.Fprintln(v, fmt.Sprintf("%s%s", color.BlackBg("F1"), "Help"))
 	return nil
 }
 

ui/views/help.go

@@ -4,13 +4,22 @@ import (
 	"fmt"
 
 	"github.com/jroimartin/gocui"
+
+	"github.com/edouardparis/lntop/ui/color"
 )
 
 const (
 	HELP = "help"
 )
 
-func SetHelp(g *gocui.Gui, x0, y0, x1, y1 int) error {
+type Help struct {
+}
+
+func (h Help) Name() string {
+	return HELP
+}
+
+func (h Help) Set(g *gocui.Gui, x0, y0, x1, y1 int) error {
 	v, err := g.SetView(HELP, x0-1, y0, x1, y1)
 	if err != nil {
 		if err != gocui.ErrUnknownView {
@@ -18,7 +27,13 @@ func SetHelp(g *gocui.Gui, x0, y0, x1, y1 int) error {
 		}
 	}
 	v.Frame = false
-	fmt.Fprintln(v, "HELP")
+	fmt.Fprintln(v, "lntop 0.0.1 - (C) 2019 Edouard Paris")
+	fmt.Fprintln(v, "Released under the MIT License")
+	fmt.Fprintln(v, "")
+	fmt.Fprintln(v, fmt.Sprintf("%5s %s",
+		color.Cyan("F1 h:"), "show this help screen"))
 	_, err = g.SetCurrentView(HELP)
 	return err
 }
+
+func NewHelp() *Help { return &Help{} }

ui/views/views.go

@@ -5,13 +5,35 @@ import (
 	"github.com/jroimartin/gocui"
 )
 
+type view interface {
+	Set(*gocui.Gui, int, int, int, int) error
+	Name() string
+}
+
 type Views struct {
+	Previous view
+	Help     *Help
 	Header   *Header
 	Summary  *Summary
 	Channels *Channels
 	Footer   *Footer
 }
 
+func (v Views) Get(name string) view {
+	switch name {
+	case CHANNELS:
+		return v.Channels
+	case HELP:
+		return v.Help
+	default:
+		return nil
+	}
+}
+
+func (v *Views) SetPrevious(p view) {
+	v.Previous = p
+}
+
 func (v *Views) Layout(g *gocui.Gui, maxX, maxY int) error {
 	err := v.Header.Set(g, 0, -1, maxX, 1)
 	if err != nil {
@@ -35,6 +57,7 @@ func New(m *models.Models) *Views {
 	return &Views{
 		Header:   NewHeader(m.Info),
 		Footer:   NewFooter(),
+		Help:     NewHelp(),
 		Summary:  NewSummary(m.Info, m.ChannelsBalance, m.WalletBalance, m.Channels),
 		Channels: NewChannels(m.Channels),
 	}