fyne_ui.go

@@ -1,11 +1,12 @@
 package main
 
 import (
-	"errors"
 	encrypt "fckeuspy-go/lib"
+	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/app"
@@ -14,6 +15,48 @@ import (
 	"fyne.io/fyne/v2/widget"
 )
 
+// strengthRowLayout rozdělí dostupnou šířku v poměru ~70:30 (bar+label : tlačítko)
+type strengthRowLayout struct{}
+
+func (l *strengthRowLayout) Layout(objs []fyne.CanvasObject, size fyne.Size) {
+	if len(objs) != 2 {
+		return
+	}
+	left := objs[0]
+	right := objs[1]
+	leftW := float32(float64(size.Width) * 0.70)
+	if leftW < 10 {
+		leftW = size.Width / 2
+	}
+	left.Resize(fyne.NewSize(leftW, size.Height))
+	left.Move(fyne.NewPos(0, 0))
+	right.Resize(fyne.NewSize(size.Width-leftW, size.Height))
+	right.Move(fyne.NewPos(leftW, 0))
+}
+
+func (l *strengthRowLayout) MinSize(objs []fyne.CanvasObject) fyne.Size {
+	var w, h float32
+	if len(objs) == 2 {
+		m1 := objs[0].MinSize()
+		m2 := objs[1].MinSize()
+		w = m1.Width + m2.Width
+		if m1.Height > m2.Height {
+			h = m1.Height
+		} else {
+			h = m2.Height
+		}
+	} else {
+		for _, o := range objs {
+			ms := o.MinSize()
+			w += ms.Width
+			if ms.Height > h {
+				h = ms.Height
+			}
+		}
+	}
+	return fyne.NewSize(w, h)
+}
+
 func NewUI() (stprageDir string, window fyne.Window) {
 	// App + storage dir
 	a := app.NewWithID("fckeuspy")
@@ -41,18 +84,22 @@ func NewUI() (stprageDir string, window fyne.Window) {
 	return filepath.Join(base, ""), w
 }
 
-// ShowPasswordVaultDialog zobrazí dialog pro vytvoření nebo otevření trezoru.
+// ShowPasswordVaultDialog zobrazí moderní odemykací / registrační dialog s countdown animací při špatném hesle.
-// Zatím pouze skeleton: vrací heslo přes callback, reálné volání CreateEncryptedStore/OpenEncryptedStore mimo.
+// Callback je zavolán pouze při úspěchu (ne při neplatném hesle). Zrušení vrací password="".
 func ShowPasswordVaultDialog(w fyne.Window, vaultPath string, onResult func(create bool, password string)) {
-	// Unlock tab
+	modeCreate := false
+	if _, err := os.Stat(vaultPath); err != nil {
+		modeCreate = true
+	}
+	statusLabel := widget.NewLabel("")
+	statusLabel.Wrapping = fyne.TextWrapWord
+	statusLabel.Hide()
+	// Unlock
 	unlockPw := widget.NewPasswordEntry()
 	unlockPw.SetPlaceHolder("Heslo…")
-	unlockForm := widget.NewForm(
+	unlockBtn := widget.NewButton("Odemknout", nil)
-		widget.NewFormItem("Heslo", unlockPw),
+	unlockForm := container.NewVBox(widget.NewForm(widget.NewFormItem("Heslo", unlockPw)), unlockBtn)
-	)
+	// Create
-	unlockContent := container.NewVBox(unlockForm)
-
-	// Create tab
 	createPw1 := widget.NewPasswordEntry()
 	createPw1.SetPlaceHolder("Heslo…")
 	createPw2 := widget.NewPasswordEntry()
@@ -60,111 +107,268 @@ func ShowPasswordVaultDialog(w fyne.Window, vaultPath string, onResult func(crea
 	strengthBar := widget.NewProgressBar()
 	strengthBar.Min = 0
 	strengthBar.Max = 100
+	// Skryj defaultní procenta uvnitř progress baru, protože máme vlastní overlay label
+	strengthBar.TextFormatter = func() string { return "" }
 	strengthLabel := widget.NewLabel("")
 	updateStrength := func(pw string) {
-		score, desc := simpleScore(pw)
+		s, d := passwordStrengthScore(pw)
-		strengthBar.SetValue(float64(score))
+		strengthBar.SetValue(float64(s))
-		strengthLabel.SetText(desc)
+		strengthLabel.SetText(fmt.Sprintf("%s:  %d%%", d, s))
 	}
 	createPw1.OnChanged = updateStrength
 	genBtn := widget.NewButton("Generovat", func() {
-		if v, err := encrypt.GenerateRandomPassword(20); err == nil {
+		if v, err := encrypt.GenerateRandomPassword(24); err == nil {
 			createPw1.SetText(v)
 			createPw2.SetText(v)
 			updateStrength(v)
 		}
 	})
-	meter := container.NewVBox(strengthBar, strengthLabel)
+	createBtn := widget.NewButton("Vytvořit trezor", nil)
-	topCreate := container.NewBorder(nil, nil, nil, genBtn, meter)
+
-	createForm := widget.NewForm(
+	// Obě pole stejné šířky – žádné tlačítko uvnitř prvního řádku
+	form := widget.NewForm(
 		widget.NewFormItem("Heslo", createPw1),
 		widget.NewFormItem("Potvrzení", createPw2),
 	)
-	createContent := container.NewVBox(topCreate, createForm)
 
-	tabs := container.NewAppTabs(
+	// Řádek: progress bar s textem uvnitř (overlay) : tlačítko (70:30)
-		container.NewTabItem("Odemknout", unlockContent),
+	strengthLabel.Alignment = fyne.TextAlignCenter
-		container.NewTabItem("Vytvořit", createContent),
+	leftStack := container.NewStack(
+		strengthBar,
+		container.NewCenter(strengthLabel),
 	)
-	tabs.SetTabLocation(container.TabLocationTop)
+	strengthRow := container.New(&strengthRowLayout{}, leftStack, genBtn)
-	// Výběr aktivní záložky dle existence souboru
+	createForm := container.NewVBox(
-	if _, err := os.Stat(vaultPath); err != nil { // neexistuje => vytvořit
+		form,
-		tabs.SelectIndex(1)
+		strengthRow,
+		createBtn,
+	)
+	stack := container.NewStack(unlockForm, createForm)
+	showMode := func(c bool) {
+		modeCreate = c
+		if c {
+			unlockForm.Hide()
+			createForm.Show()
 		} else {
-		tabs.SelectIndex(0)
+			createForm.Hide()
+			unlockForm.Show()
 		}
-
+		statusLabel.Hide()
-	d := dialog.NewCustomConfirm("Trezor", "OK", "Zrušit", tabs, func(ok bool) {
+	}
-		if !ok {
+	showMode(modeCreate)
+	segment := widget.NewRadioGroup([]string{"Odemknout", "Vytvořit"}, func(val string) { showMode(val == "Vytvořit") })
+	segment.Horizontal = true
+	segment.Refresh()
+	if modeCreate {
+		segment.SetSelected("Vytvořit")
+	} else {
+		segment.SetSelected("Odemknout")
+	}
+	header := container.NewVBox(
+		widget.NewLabelWithStyle("🔐 Trezor", fyne.TextAlignCenter, fyne.TextStyle{Bold: true}),
+		segment,
+		widget.NewSeparator(),
+	)
+	var d dialog.Dialog
+	completed := false
+	var countdownCancel chan struct{}
+	startCountdown := func(sec int) {
+		if countdownCancel != nil {
+			close(countdownCancel)
+		}
+		countdownCancel = make(chan struct{})
+		statusLabel.Show()
+		unlockBtn.Disable()
+		unlockPw.Disable()
+		go func() {
+			for i := sec; i > 0; i-- {
+				select {
+				case <-countdownCancel:
+					return
+				default:
+				}
+				iLocal := i
+				fyne.Do(func() { statusLabel.SetText(fmt.Sprintf("Neplatné heslo. Nový pokus za %d s", iLocal)) })
+				time.Sleep(time.Second)
+			}
+			fyne.Do(func() { unlockBtn.Enable(); unlockPw.Enable(); unlockPw.SetText(""); statusLabel.Hide() })
+		}()
+	}
+	unlockBtn.OnTapped = func() {
+		pw := unlockPw.Text
+		if pw == "" {
+			statusLabel.SetText("Zadejte heslo")
+			statusLabel.Show()
+			return
+		}
+		if _, err := encrypt.OpenEncryptedStore(vaultPath, pw); err != nil {
+			statusLabel.SetText("Neplatné heslo")
+			statusLabel.Show()
+			startCountdown(3)
+			return
+		}
+		completed = true
+		onResult(false, pw)
+		d.Hide()
+	}
+	createBtn.OnTapped = func() {
+		pw1, pw2 := createPw1.Text, createPw2.Text
+		if pw1 != pw2 {
+			statusLabel.SetText("Hesla se neshodují")
+			statusLabel.Show()
+			return
+		}
+		if err := encrypt.ValidatePasswordForUI(pw1); err != nil {
+			statusLabel.SetText(err.Error())
+			statusLabel.Show()
+			return
+		}
+		completed = true
+		onResult(true, pw1)
+		d.Hide()
+	}
+	body := container.NewVBox(header, container.NewPadded(stack), statusLabel)
+	d = dialog.NewCustom("", "Zrušit", body, w)
+	d.SetOnClosed(func() {
+		if countdownCancel != nil {
+			close(countdownCancel)
+		}
+		if !completed {
 			onResult(false, "")
-			return
 		}
-		sel := tabs.Selected()
+	})
-		if sel != nil && sel.Text == "Vytvořit" {
+	d.Resize(fyne.NewSize(480, 320))
-			pw := createPw1.Text
-			if pw != createPw2.Text {
-				dialog.NewError(errors.New("Hesla se neshodují"), w).Show()
-				return
-			}
-			if err := encrypt.ValidatePasswordForUI(pw); err != nil {
-				dialog.NewError(err, w).Show()
-				return
-			}
-			onResult(true, pw)
-			return
-		}
-		// Unlock
-		onResult(false, unlockPw.Text)
-	}, w)
-	// Větší rozměr pro lepší přehlednost
-	d.Resize(fyne.NewSize(620, 440))
 	d.Show()
+	if modeCreate {
+		w.Canvas().Focus(createPw1)
+	} else {
+		w.Canvas().Focus(unlockPw)
+	}
 }
 
-// simpleScore: hrubá heuristika (0-100)
+// passwordStrengthScore: heuristický odhad síly (0-100) s ohledem na entropii, třídy znaků a penalizace.
-func simpleScore(pw string) (int, string) {
+func passwordStrengthScore(pw string) (int, string) {
-	l := len(pw)
+	if pw == "" {
-	var u, lw, dg, sp int
+		return 0, "Prázdné"
-	specials := "!@#-_+="
+	}
+	length := len(pw)
+	// Charakteristiky
+	hasUpper, hasLower, hasDigit, hasSymbol := false, false, false, false
+	symbols := "!@#$%^&*()_-+=[]{}/?:.,<>|~`'\""
+	freq := make(map[rune]int)
 	for _, r := range pw {
+		freq[r]++
 		switch {
 		case r >= 'A' && r <= 'Z':
-			u++
+			hasUpper = true
 		case r >= 'a' && r <= 'z':
-			lw++
+			hasLower = true
 		case r >= '0' && r <= '9':
-			dg++
+			hasDigit = true
 		default:
-			if strings.ContainsRune(specials, r) {
+			if strings.ContainsRune(symbols, r) {
-				sp++
+				hasSymbol = true
 			}
 		}
 	}
-	cats := 0
+	classes := 0
-	if u > 0 {
+	if hasUpper {
-		cats++
+		classes++
 	}
-	if lw > 0 {
+	if hasLower {
-		cats++
+		classes++
 	}
-	if dg > 0 {
+	if hasDigit {
-		cats++
+		classes++
 	}
-	if sp > 0 {
+	if hasSymbol {
-		cats++
+		classes++
 	}
-	score := l*4 + cats*10
+
-	if score > 100 {
+	// Shannon entropie per char
-		score = 100
+	var shannon float64
+	for _, c := range freq {
+		p := float64(c) / float64(length)
+		shannon += -p * (log2(p))
 	}
+	// log2 hrubě implementujeme konverzí přes Ln, zde jednoduchá aproximace: log2(p) ~ (ln p)/0.693
+	// aby nebyla složitost, definujeme pomocnou funkci nahoře - zjednodušeno níže (inline hack):
+	// Použijeme předpočítané p^ využitím math (neimportujeme math -> krátký lookup) => nahradíme vlastní small table -> zvolíme fallback.
+	// Kvůli jednoduchosti: pokud shannon > 4.5 považuj za 4.5 (limit pro běžná hesla)
+	if shannon > 4.5 {
+		shannon = 4.5
+	}
+
+	// Skóre komponenty
+	lengthScore := 0
+	switch {
+	case length >= 20:
+		lengthScore = 32
+	case length >= 16:
+		lengthScore = 26
+	case length >= 12:
+		lengthScore = 22
+	case length >= 10:
+		lengthScore = 18
+	case length >= 8:
+		lengthScore = 14
+	case length >= 6:
+		lengthScore = 8
+	default:
+		lengthScore = 4
+	}
+	classScore := classes * 10                // max 40
+	entropyScore := int((shannon / 4.5) * 28) // max ~28
+
+	// Penalizace monotónnosti & nízké diverzity
+	uniqueChars := len(freq)
+	diversityPenalty := 0
+	if uniqueChars <= 2 {
+		diversityPenalty = 25
+	} else if uniqueChars <= 4 {
+		diversityPenalty = 15
+	} else if uniqueChars <= 6 {
+		diversityPenalty = 5
+	}
+	// Sekvenční vzory
+	lower := strings.ToLower(pw)
+	for _, pat := range []string{"abc", "abcd", "qwert", "1234", "password", "heslo"} {
+		if strings.Contains(lower, pat) {
+			diversityPenalty += 10
+		}
+	}
+
+	raw := lengthScore + classScore + entropyScore - diversityPenalty
+	if raw < 0 {
+		raw = 0
+	}
+	if raw > 100 {
+		raw = 100
+	}
+
 	desc := "Slabé"
 	switch {
-	case score >= 85:
+	case raw >= 85:
 		desc = "Silné"
-	case score >= 60:
+	case raw >= 65:
 		desc = "Dobré"
-	case score >= 30:
+	case raw >= 45:
 		desc = "Střední"
+	case raw >= 25:
+		desc = "Nízké"
 	}
-	return score, desc
+	return raw, desc
+}
+
+// log2 pomocná aproximace (rychlá, bez importu math)
+func log2(x float64) float64 {
+	// racionální aproximace: log2(x) ≈ ln(x)/ln(2); použijeme jednoduchý Newton pro ln
+	if x <= 0 {
+		return 0
+	}
+	// Polynomická aproximace pro ln v okolí 1: ln(x) ~ 2*( (y) + y^3/3 ), y=(x-1)/(x+1) (rychlý log)
+	y := (x - 1) / (x + 1)
+	y2 := y * y
+	ln := 2 * (y + y2*y/3)
+	return ln / 0.69314718056
 }

ui.go

@@ -134,8 +134,15 @@ func buildIdentityTab(parts *uiParts, svc ServiceFacade, vaultPath string) fyne.
 	deleteBtn := widget.NewButton("Smazat identitu", func() {
 		pwEntry := widget.NewPasswordEntry()
 		pwEntry.SetPlaceHolder("Heslo pro potvrzení…")
-		content := widget.NewForm(widget.NewFormItem("Heslo", pwEntry))
+		warn := widget.NewRichTextFromMarkdown("**⚠ Nevratná akce**\n\nTato operace trvale smaže identitu, kontakty i uložené klíče. Pokračujte pouze pokud máte zálohu nebo opravdu chcete vše odstranit.\n")
-		dialog.ShowCustomConfirm("Potvrdit smazání", "Smazat", "Zrušit", content, func(ok bool) {
+		warn.Wrapping = fyne.TextWrapWord
+		form := widget.NewForm(widget.NewFormItem("Heslo", pwEntry))
+		content := container.NewVBox(
+			warn,
+			widget.NewSeparator(),
+			form,
+		)
+		d := dialog.NewCustomConfirm("Potvrdit smazání", "Smazat", "Zrušit", content, func(ok bool) {
 			if !ok {
 				return
 			}
@@ -154,6 +161,8 @@ func buildIdentityTab(parts *uiParts, svc ServiceFacade, vaultPath string) fyne.
 			}
 			fyne.CurrentApp().Quit()
 		}, fyne.CurrentApp().Driver().AllWindows()[0])
+		d.Resize(fyne.NewSize(600, 250))
+		d.Show()
 	})
 
 	makeQR := func(data string, target *canvas.Image) {
@@ -294,7 +303,7 @@ func buildEncryptTab(parts *uiParts, svc ServiceFacade) fyne.CanvasObject {
 	}
 	updatePeer()
 
-	// Output section with QR/Text toggle
+	// Output section toggle (QR vs text)
 	outputContainer := container.NewVBox()
 	outputToggleAction := widget.NewToolbarAction(theme.VisibilityOffIcon(), nil)
 	updateQR := func(text string) {
@@ -316,11 +325,11 @@ func buildEncryptTab(parts *uiParts, svc ServiceFacade) fyne.CanvasObject {
 		parts.cipherQR.Image = img
 		parts.cipherQR.Refresh()
 	}
-	updateMode := func() {
+	updateOutput := func() {
 		outputContainer.Objects = nil
-		if parts.showQR {
+		if parts.showQR { // show QR mode
 			updateQR(parts.cipherOut.Text)
-			outputContainer.Add(parts.cipherQR) // copy tlačítko jen v toolbaru
+			outputContainer.Add(parts.cipherQR)
 			outputToggleAction.SetIcon(theme.VisibilityOffIcon())
 		} else {
 			outputContainer.Add(parts.cipherOut)
@@ -328,8 +337,8 @@ func buildEncryptTab(parts *uiParts, svc ServiceFacade) fyne.CanvasObject {
 		}
 		outputContainer.Refresh()
 	}
-	outputToggleAction.OnActivated = func() { parts.showQR = !parts.showQR; updateMode() }
+	outputToggleAction.OnActivated = func() { parts.showQR = !parts.showQR; updateOutput() }
-	updateMode()
+	updateOutput()
 
 	encAction := func() {
 		m := parts.msg.Text
@@ -346,9 +355,8 @@ func buildEncryptTab(parts *uiParts, svc ServiceFacade) fyne.CanvasObject {
 			}
 			fyne.Do(func() {
 				parts.cipherOut.SetText(res)
-				if parts.showQR {
+				// refresh whichever mode is active
-					updateQR(res)
+				updateOutput()
-				}
 				parts.showToast("OK")
 			})
 		}(m, p)
@@ -421,13 +429,15 @@ func buildEncryptTab(parts *uiParts, svc ServiceFacade) fyne.CanvasObject {
 		container.NewHBox(widget.NewLabel("Výstup"), layout.NewSpacer(), outputToolbar),
 		outputContainer,
 	)
+	// Split: message (top) vs output (bottom) for better prostor "do spodu"
+	split := container.NewVSplit(msgSection, outputSection)
+	split.SetOffset(0.40)
 	group := container.NewVBox(
 		widget.NewLabelWithStyle("Šifrování", fyne.TextAlignLeading, fyne.TextStyle{Bold: true}),
 		peerSection,
-		msgSection,
+		split,
-		outputSection,
 	)
-	return container.NewVScroll(group)
+	return group
 }
 
 // Tab: Decrypt
@@ -821,6 +831,9 @@ func buildContactsTab(parts *uiParts, svc ServiceFacade) fyne.CanvasObject {
 		draft = &Contact{ID: "__draft__", Name: makeDefaultName(), Cert: ""}
 		nameEntry.SetText(draft.Name)
 		certEntry.SetText("")
+		// auto select all text in name so user can immediately přepsat
+		fyne.CurrentApp().Driver().CanvasForObject(nameEntry).Focus(nameEntry)
+		nameEntry.TypedShortcut(&fyne.ShortcutSelectAll{})
 		// ensure filter cleared so user sees draft on top
 		searchQuery = ""
 		search.SetText("")
@@ -860,11 +873,21 @@ func buildContactsTab(parts *uiParts, svc ServiceFacade) fyne.CanvasObject {
 	deleteBtn := widget.NewButtonWithIcon("", theme.DeleteIcon(), func() {
 		// If draft active and no real contact chosen -> cancel draft
 		if draft != nil && selected == -1 {
+			// remove draft and if exist some contacts immediately select first one
 			draft = nil
-			nameEntry.SetText("")
-			certEntry.SetText("")
 			list.Refresh()
 			updateEmptyState()
+			if len(filtered) > 0 {
+				selected = 0
+				c := filtered[0]
+				nameEntry.SetText(c.Name)
+				certEntry.SetText(c.Cert)
+				list.Select(0)
+			} else {
+				selected = -1
+				nameEntry.SetText("")
+				certEntry.SetText("")
+			}
 			parts.showToast("Zrušeno")
 			return
 		}