Working on UI

ui/ui.go

@@ -0,0 +1,128 @@
+package ui
+
+import (
+	"fmt"
+	"os"
+	"time"
+
+	"git.bullercodeworks.com/brian/gime/cli"
+	"git.bullercodeworks.com/brian/wandle"
+	"github.com/nsf/termbox-go"
+)
+
+// Screen/Source Ids
+const (
+	ListTimersId = ScreenMsgSource(iota << 8)
+	SettingsId
+	ErrorId
+)
+
+// Commands
+const (
+	CmdCanceled = ScreenMsgCommand(iota)
+	CmdSaved
+
+	// Goto Screen Commands
+	CmdGotoSettings
+	CmdGotoTimerList
+)
+
+func RunTUI(p *cli.Program) error {
+	ui := NewUi(p)
+	ui.debug = true
+	if err := ui.Start(); err != nil {
+		return err
+	}
+	// Exiting
+	fmt.Printf("Done\n")
+	return nil
+}
+
+type Ui struct {
+	debug   bool
+	wandle  *wandle.Program
+	program *cli.Program
+	err     error
+
+	screens map[ScreenMsgSource]wandle.Screen
+
+	prevScreen, currScreen ScreenMsgSource
+}
+
+func NewUi(p *cli.Program) *Ui {
+	ui := &Ui{
+		screens: make(map[ScreenMsgSource]wandle.Screen),
+		program: p,
+		err:     p.Initialize(),
+	}
+	var s wandle.Screen
+	var sId ScreenMsgSource
+	if ui.err != nil {
+		s, sId = NewSettingsScreen(ui), SettingsId
+	} else {
+		if ui.err = ui.program.LoadTimerList(); ui.err != nil {
+			s, sId = NewSettingsScreen(ui), SettingsId
+		} else if ui.err = ui.program.LoadDoneList(); ui.err != nil {
+			s, sId = NewSettingsScreen(ui), SettingsId
+		} else {
+			s, sId = NewListTimersScreen(ui), ListTimersId
+		}
+	}
+	ui.screens[sId] = s
+	ui.currScreen = sId
+	ui.wandle = wandle.NewProgram(s)
+	ui.wandle.Style(wandle.NewStyle(
+		termbox.RGBToAttribute(uint8(0), uint8(255), uint8(0)),
+		termbox.RGBToAttribute(uint8(0), uint8(0), uint8(0)),
+	))
+	return ui
+}
+
+func (u *Ui) GotoScreen(id ScreenMsgSource) func() wandle.Msg {
+	u.prevScreen, u.currScreen = u.currScreen, id
+	if s, ok := u.screens[id]; ok {
+		return wandle.SwitchScreenCmd(s)
+	}
+	var s wandle.Screen
+	switch id {
+	case ListTimersId:
+		s = NewListTimersScreen(u)
+	case SettingsId:
+		s = NewSettingsScreen(u)
+	}
+	u.screens[id] = s
+	return wandle.SwitchScreenCmd(s)
+}
+func (u *Ui) CanGoBack() bool {
+	return u.prevScreen > 0
+}
+func (u *Ui) GoBack() func() wandle.Msg {
+	if !u.CanGoBack() {
+		return nil
+	}
+	return u.GotoScreen(u.prevScreen)
+}
+
+func (u *Ui) Log(v string) error {
+	f, err := os.OpenFile("gime.log", os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
+	if err != nil {
+		panic(err)
+	}
+	defer f.Close()
+	_, err = f.WriteString(fmt.Sprintf("%s: %s\n", time.Now().Format(time.RFC3339), v))
+	return err
+}
+
+func (u *Ui) Start() error {
+	return u.wandle.Start()
+}
+
+type ScreenMsg struct {
+	source  ScreenMsgSource
+	command ScreenMsgCommand
+	data    interface{}
+	err     error
+}
+
+type ScreenMsgSource int
+type ScreenMsgCommand int