login-app: Use a pure-Go tty interface instead of curses

2021-02-16 21:18:56 +01:00 · 2021-02-16 21:18:56 +01:00 · 8ab758ac9a
commit 8ab758ac9a
parent af53a37d33
8 changed files with 376 additions and 298 deletions
--- a/pkg/login-app/cmd/dialog-login.go
+++ b/pkg/login-app/cmd/dialog-login.go
@ -0,0 +1,124 @@
+package main
+
+import (
+	ui "github.com/VladimirMarkelov/clui"
+	term "github.com/nsf/termbox-go"
+)
+
+const (
+	LoginOk = iota
+	LoginCanceled
+	LoginInvalid
+)
+
+type LoginDialog struct {
+	View     *ui.Window
+	Username string
+	Password string
+	Action   int
+
+	result      int
+	beforeClose func()
+	onClose     func()
+	onCheck     func(string, string) bool
+}
+
+func CreateLoginDialog(title string) *LoginDialog {
+	dlg := new(LoginDialog)
+
+	sWidth, sHeight := ui.ScreenSize()
+	wWidth, wHeight := 40, 15
+	dlg.View = ui.AddWindow(sWidth/2-wWidth/2, sHeight/2-wHeight/2, wWidth, wHeight, title)
+	ui.WindowManager().BeginUpdate()
+	defer ui.WindowManager().EndUpdate()
+
+	dlg.View.SetModal(true)
+	dlg.View.SetSizable(false)
+	dlg.View.SetTitleButtons(ui.ButtonDefault)
+	dlg.View.SetPack(ui.Vertical)
+
+	userfrm := ui.CreateFrame(dlg.View, 1, 1, ui.BorderNone, ui.Fixed)
+	userfrm.SetPaddings(1, 1)
+	userfrm.SetPack(ui.Horizontal)
+	userfrm.SetGaps(1, 0)
+	ui.CreateLabel(userfrm, ui.AutoSize, ui.AutoSize, "   Login", ui.Fixed)
+	edUser := ui.CreateEditField(userfrm, 20, "", 1)
+
+	passfrm := ui.CreateFrame(dlg.View, 1, 1, ui.BorderNone, 1)
+	passfrm.SetPaddings(1, 1)
+	passfrm.SetPack(ui.Horizontal)
+	passfrm.SetGaps(1, 0)
+	ui.CreateLabel(passfrm, ui.AutoSize, ui.AutoSize, "Password", ui.Fixed)
+	edPass := ui.CreateEditField(passfrm, 20, "", 1)
+	edPass.SetPasswordMode(true)
+
+	filler := ui.CreateFrame(dlg.View, 1, 1, ui.BorderNone, 1)
+	filler.SetPack(ui.Horizontal)
+	lbRes := ui.CreateLabel(filler, ui.AutoSize, ui.AutoSize, "", 1)
+
+	blist := ui.CreateFrame(dlg.View, 1, 1, ui.BorderNone, ui.Fixed)
+	blist.SetPack(ui.Horizontal)
+	blist.SetPaddings(1, 1)
+	btnOk := ui.CreateButton(blist, 20, 4, "Authenticate me", 1)
+
+	btnOk.OnClick(func(ev ui.Event) {
+		if dlg.onCheck != nil && !dlg.onCheck(edUser.Title(), edPass.Title()) {
+			lbRes.SetTitle("Invalid username or password")
+			dlg.Action = LoginInvalid
+			return
+		}
+
+		dlg.Action = LoginOk
+		if dlg.onCheck == nil {
+			dlg.Username = edUser.Title()
+			dlg.Password = edPass.Title()
+		}
+
+		if dlg.beforeClose != nil {
+			dlg.beforeClose()
+		}
+		ui.WindowManager().DestroyWindow(dlg.View)
+		ui.WindowManager().BeginUpdate()
+
+		closeFunc := dlg.onClose
+		ui.WindowManager().EndUpdate()
+		if closeFunc != nil {
+			closeFunc()
+		}
+	})
+
+	dlg.View.OnKeyDown(func(ev ui.Event, data interface{}) bool {
+		if ev.Key == term.KeyEnter {
+			if edUser.Title() == "" {
+				ui.ActivateControl(dlg.View, edUser)
+			} else if edPass.Title() == "" {
+				ui.ActivateControl(dlg.View, edPass)
+			} else {
+				if dlg.beforeClose != nil {
+					dlg.beforeClose()
+				}
+				ui.WindowManager().DestroyWindow(dlg.View)
+				ui.WindowManager().BeginUpdate()
+
+				closeFunc := dlg.onClose
+				ui.WindowManager().EndUpdate()
+				if closeFunc != nil {
+					closeFunc()
+				}
+			}
+			return true
+		}
+		return false
+	}, nil)
+
+	edUser.OnChange(func(ev ui.Event) {
+		lbRes.SetTitle("")
+	})
+	edPass.OnChange(func(ev ui.Event) {
+		lbRes.SetTitle("")
+	})
+
+	ui.ActivateControl(dlg.View, edUser)
+
+	return dlg
+}