Add attachment replace workflow UI

main.go

@@ -7,6 +7,7 @@ import (
 	"image"
 	"image/color"
 	"os"
+	"slices"
 	"strings"
 
 	"gioui.org/app"
@@ -34,6 +35,8 @@ const (
 	desktopSubtitle = "KeePass-compatible password management for desktop-first workflows"
 )
 
+const maxAttachmentBytes = 10 << 20
+
 type bannerKind string
 
 const (
@@ -54,6 +57,11 @@ type uiSurface struct {
 	Locked  bool
 }
 
+type attachmentItem struct {
+	Name string
+	Size int
+}
+
 type ui struct {
 	mode                  string
 	theme                 *material.Theme
@@ -103,6 +111,7 @@ type ui struct {
 	deleteTemplate        widget.Clickable
 	instantiateTemplate   widget.Clickable
 	addAttachment         widget.Clickable
+	replaceAttachment     widget.Clickable
 	removeAttachment      widget.Clickable
 	exportAttachment      widget.Clickable
 	restoreHistory        widget.Clickable
@@ -119,6 +128,7 @@ type ui struct {
 	masterKeyComposite    widget.Clickable
 	entryClicks           []widget.Clickable
 	historyClicks         []widget.Clickable
+	attachmentClicks      []widget.Clickable
 	breadcrumbs           []widget.Clickable
 	groupClicks           []widget.Clickable
 	state                 appstate.State
@@ -234,6 +244,41 @@ func (u *ui) filter() {
 	}
 }
 
+func (u *ui) selectedAttachmentItems() []attachmentItem {
+	item, ok := u.selectedEntry()
+	if !ok || len(item.Attachments) == 0 {
+		return nil
+	}
+
+	items := make([]attachmentItem, 0, len(item.Attachments))
+	for name, content := range item.Attachments {
+		items = append(items, attachmentItem{Name: name, Size: len(content)})
+	}
+	slices.SortFunc(items, func(a, b attachmentItem) int {
+		switch {
+		case a.Name < b.Name:
+			return -1
+		case a.Name > b.Name:
+			return 1
+		default:
+			return 0
+		}
+	})
+	if len(u.attachmentClicks) < len(items) {
+		u.attachmentClicks = make([]widget.Clickable, len(items))
+	}
+	return items
+}
+
+func (u *ui) selectedAttachmentNames() []string {
+	items := u.selectedAttachmentItems()
+	names := make([]string, 0, len(items))
+	for _, item := range items {
+		names = append(names, item.Name)
+	}
+	return names
+}
+
 func (u *ui) showEntriesSection() {
 	u.state.Section = appstate.SectionEntries
 	u.state.NavigateToPath(nil)
@@ -627,6 +672,9 @@ func (u *ui) layout(gtx layout.Context) layout.Dimensions {
 	for u.addAttachment.Clicked(gtx) {
 		u.runAction("add attachment", u.addAttachmentAction)
 	}
+	for u.replaceAttachment.Clicked(gtx) {
+		u.runAction("replace attachment", u.replaceAttachmentAction)
+	}
 	for u.removeAttachment.Clicked(gtx) {
 		u.runAction("remove attachment", u.removeAttachmentAction)
 	}