feat: a Fields pane for anything but a secret, first for Azure accounts: fields and groups to move through, filter and copy (#7)

docs/azure.md

@@ -13,12 +13,15 @@ is listed under each, since their permissions can differ.
 A service principal is used instead when `AZURE_CLIENT_ID`,
 `AZURE_TENANT_ID` and a secret or certificate are set in the environment.
 
-On an account's group row, the Details pane shows who it signs in as: name,
+On an account's group row, the fourth pane shows who it signs in as: name,
 user, tenant, object ID, whether the session used MFA, directory roles
-(built-in ones by name) and its subscriptions. It's read from az's account
+(built-in ones by name) and its subscriptions, read from az's account list
-list and the token lazysecrets already has, so nothing is fetched for it.
+and the token lazysecrets already has. Below them are the groups the
-`y` there copies the object ID, the one access policies and role
+account is in, nested ones too: those come from Microsoft Graph, once a
-assignments ask for.
+session, the first time the pane shows them. `y` on the row copies the
+object ID, the one access policies and role assignments ask for; `tab`
+goes into the pane, where `j`/`k` pick any field or group, `/` filters
+them (`/tenant`, `/platform`) and `y` copies the selected one.
 
 If an account's az login has expired, the status line says so once, and the
 Details pane on that account's rows says it until you sign in: press `L`

docs/keys.md

@@ -48,7 +48,7 @@ match case exactly.
 | Key | Action |
 |---|---|
 | `space` | reveal / hide the selected value (public material for keys and certificates) |
-| `y` | copy the value without revealing it; cleared from the clipboard after 30s. On an Azure account's row: its object ID |
+| `y` | copy the value without revealing it; cleared from the clipboard after 30s. On an Azure account's row: its object ID; in its pane, the selected field or group |
 | `Y` | copy the reference (`@Microsoft.KeyVault(...)`, key/certificate URL, `{{secrets/scope/key}}`) |
 | `v` | versions of the selected item (Azure); `space`/`y`/`Y` then act on that version; `esc`, `⌫` or `v` to go back |
 | `o` | open the selected item in the browser (over SSH: copy the link) |

internal/provider/azure/account.go

@@ -1,10 +1,15 @@
 package azure
 
 import (
+	"context"
+	"encoding/json"
 	"fmt"
+	"net/http"
 	"slices"
 	"strings"
 
+	"github.com/Azure/azure-sdk-for-go/sdk/azcore/policy"
+
 	"git.kebcloud.no/keb/lazysecrets/internal/provider"
 )
 
@@ -40,11 +45,8 @@ func (p *Provider) Account() (provider.Account, bool) {
 		user += " (service principal)"
 	}
 	add("user", user)
-	tenant := a.tenant
+	add("tenant", a.tenantName)
-	if a.tenantName != "" {
+	add("tenant ID", a.tenant)
-		tenant = a.tenantName + " · " + a.tenant
-	}
-	add("tenant", tenant)
 	if oid := str("oid"); oid != "" {
 		add("object ID", oid)
 		out.Copy, out.CopyLabel = oid, "object ID"
@@ -158,3 +160,68 @@ func directoryRoles(wids any) string {
 	slices.Sort(names)
 	return strings.Join(names, ", ")
 }
+
+// graphGroups lists the signed-in user's groups, nested ones too, from
+// Microsoft Graph with az's token for it.
+const graphGroups = "https://graph.microsoft.com/v1.0/me/transitiveMemberOf?$select=displayName&$top=999"
+
+var _ provider.AccountGroups = (*Provider)(nil)
+
+// Groups lists the groups the account is a member of, by name.
+func (p *Provider) Groups(ctx context.Context) ([]string, error) {
+	if p.account == nil || (p.account.cloud != "" && p.account.cloud != "AzureCloud") {
+		return nil, provider.ErrUnsupported
+	}
+	tok, err := p.cred.GetToken(ctx, policy.TokenRequestOptions{Scopes: []string{"https://graph.microsoft.com/.default"}})
+	if err != nil {
+		return nil, err
+	}
+	var names []string
+	for next := graphGroups; next != ""; {
+		req, err := http.NewRequestWithContext(ctx, http.MethodGet, next, nil)
+		if err != nil {
+			return nil, err
+		}
+		req.Header.Set("Authorization", "Bearer "+tok.Token)
+		resp, err := p.http().Do(req)
+		if err != nil {
+			return nil, err
+		}
+		var page struct {
+			Value []struct {
+				Type string `json:"@odata.type"`
+				Name string `json:"displayName"`
+			} `json:"value"`
+			Next  string `json:"@odata.nextLink"`
+			Error *struct {
+				Message string `json:"message"`
+			} `json:"error"`
+		}
+		err = json.NewDecoder(resp.Body).Decode(&page)
+		resp.Body.Close()
+		switch {
+		case err != nil:
+			return nil, fmt.Errorf("listing groups from Microsoft Graph: %w", err)
+		case page.Error != nil:
+			return nil, fmt.Errorf("listing groups from Microsoft Graph: %s", page.Error.Message)
+		case resp.StatusCode != http.StatusOK:
+			return nil, fmt.Errorf("listing groups from Microsoft Graph: %s", resp.Status)
+		}
+		for _, v := range page.Value {
+			if v.Type == "#microsoft.graph.group" && v.Name != "" {
+				names = append(names, v.Name)
+			}
+		}
+		next = page.Next
+	}
+	slices.SortFunc(names, func(a, b string) int { return strings.Compare(strings.ToLower(a), strings.ToLower(b)) })
+	return names, nil
+}
+
+// http is the client for Microsoft Graph; tests replace it.
+func (p *Provider) http() *http.Client {
+	if p.graphClient != nil {
+		return p.graphClient
+	}
+	return http.DefaultClient
+}

internal/provider/azure/account_test.go

@@ -1,7 +1,17 @@
 package azure
 
 import (
+	"context"
+	"errors"
+	"io"
+	"net/http"
+	"slices"
+	"strings"
 	"testing"
+	"time"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/azcore"
+	"github.com/Azure/azure-sdk-for-go/sdk/azcore/policy"
 
 	"git.kebcloud.no/keb/lazysecrets/internal/provider"
 )
@@ -25,7 +35,7 @@ func TestAccount(t *testing.T) {
 		got[f.Label] = f.Value
 	}
 	want := map[string]string{
-		"name": "Alice Example", "user": "alice@contoso.com", "tenant": "Contoso · t1",
+		"name": "Alice Example", "user": "alice@contoso.com", "tenant": "Contoso", "tenant ID": "t1",
 		"object ID": "11111111-2222-3333-4444-555555555555", "sign-in": "MFA · password",
 		"roles": "Global Administrator, role aaaaaaaa", "subs": "3 · default platform",
 	}
@@ -44,7 +54,7 @@ func TestAccount(t *testing.T) {
 	// Before any token: what az's list says.
 	claims = nil
 	a, _ = p.Account()
-	if len(a.Fields) != 3 || a.Copy != "" {
+	if len(a.Fields) != 4 || a.Copy != "" {
 		t.Errorf("without a token: %+v", a)
 	}
 	if _, ok := (&Provider{}).Account(); ok {
@@ -65,3 +75,40 @@ func TestSignInMethods(t *testing.T) {
 		}
 	}
 }
+
+type staticToken struct{}
+
+func (staticToken) GetToken(context.Context, policy.TokenRequestOptions) (azcore.AccessToken, error) {
+	return azcore.AccessToken{Token: "tok", ExpiresOn: time.Now().Add(time.Hour)}, nil
+}
+
+type graphPages map[string]string // by URL
+
+func (g graphPages) RoundTrip(r *http.Request) (*http.Response, error) {
+	body, ok := g[r.URL.String()]
+	if !ok || r.Header.Get("Authorization") != "Bearer tok" {
+		return &http.Response{StatusCode: 404, Status: "404 Not Found", Body: io.NopCloser(strings.NewReader(`{}`))}, nil
+	}
+	return &http.Response{StatusCode: 200, Status: "200 OK", Body: io.NopCloser(strings.NewReader(body))}, nil
+}
+
+func TestGroups(t *testing.T) {
+	next := "https://graph.microsoft.com/v1.0/next"
+	p := &Provider{
+		cred:    staticToken{},
+		account: &accountDetails{account: account{user: "alice@contoso.com"}},
+		graphClient: &http.Client{Transport: graphPages{
+			graphGroups: `{"value":[{"@odata.type":"#microsoft.graph.group","displayName":"vault readers"},
+				{"@odata.type":"#microsoft.graph.directoryRole","displayName":"Global Reader"}],"@odata.nextLink":"` + next + `"}`,
+			next: `{"value":[{"@odata.type":"#microsoft.graph.group","displayName":"Platform team"}]}`,
+		}},
+	}
+	got, err := p.Groups(context.Background())
+	if err != nil || !slices.Equal(got, []string{"Platform team", "vault readers"}) {
+		t.Errorf("groups %q, %v", got, err)
+	}
+	p.account.cloud = "AzureChinaCloud"
+	if _, err := p.Groups(context.Background()); !errors.Is(err, provider.ErrUnsupported) {
+		t.Errorf("other cloud: %v", err)
+	}
+}

internal/provider/azure/azure.go

@@ -9,6 +9,7 @@ import (
 	"crypto/x509"
 	"errors"
 	"fmt"
+	"net/http"
 	"regexp"
 	"slices"
 	"strings"
@@ -39,6 +40,7 @@ type Provider struct {
 	cred        azcore.TokenCredential
 	opts        options
 	account     *accountDetails // nil for a service principal from AZURE_*
+	graphClient *http.Client    // for Groups; nil for the default
 	subs        *armsubscriptions.Client
 	graph       *armresourcegraph.Client
 

internal/provider/provider.go

@@ -198,3 +198,10 @@ type Account struct {
 	// Copy is what y copies on the provider's row, named CopyLabel.
 	Copy, CopyLabel string
 }
+
+// AccountGroups is implemented by providers that can list the groups
+// their account is a member of, directly or through other groups. It
+// goes over the network.
+type AccountGroups interface {
+	Groups(ctx context.Context) ([]string, error)
+}

internal/ui/app/app.go

@@ -163,6 +163,10 @@ type Model struct {
 	clip      Clipboard
 	clipClear time.Duration
 	openURL   func(string) error
+	// fields is the fourth pane for anything but a secret (now: an
+	// account), with each account's groups as they load (fields.go).
+	fields   panes.Fields
+	groups   map[string]groupsState
 	getenv   func(string) string
 	nvimOpen func(server, path string, line int) error // edit.go
 	now      func() time.Time
@@ -356,6 +360,8 @@ func New(providers []provider.Provider, opts Options) Model {
 		getenv:        os.Getenv,
 		nvimOpen:      nvimOpen,
 		cache:         newCache(),
+		groups:        map[string]groupsState{},
+		fields:        panes.NewFields(),
 	}
 	if m.clip == nil {
 		m.clip = clipboard.New()
@@ -563,6 +569,9 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	case persistedMsg:
 		m.handlePersisted(msg)
 
+	case groupsMsg:
+		m.groups[msg.provider] = groupsState{names: msg.names, err: msg.err}
+
 	case crawlMsg:
 		cmds = append(cmds, m.handleCrawl(msg))
 
@@ -723,8 +732,7 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	m.askHandlerSetup()
 	m.keys.Login.SetEnabled(m.loginFor() != nil)
 	m.detail.SetMessage(m.selectedProblem())
-	acct, _ := m.selectedAccount()
+	cmds = append(cmds, m.syncFields())
-	m.detail.SetAccount(acct.Fields)
 	if m.anyLoading() && !m.spinning {
 		m.spinning = true
 		cmds = append(cmds, m.spin.Tick)
@@ -791,8 +799,14 @@ func (m *Model) handleKey(msg tea.KeyPressMsg) (cmd tea.Cmd, quit bool) {
 		m.jump(false)
 	case key.Matches(msg, k.NextPane):
 		m.focus = (m.focus + 1) % paneCount
+		if m.focus == paneContainers && m.fields.Shown() {
+			m.focus = paneDetail // an account's row: nothing between
+		}
 	case key.Matches(msg, k.PrevPane):
 		m.focus = (m.focus + paneCount - 1) % paneCount
+		if m.focus == paneSecrets && m.fields.Shown() {
+			m.focus = paneSources
+		}
 	case key.Matches(msg, k.Pane1):
 		m.focus = paneSources
 	case key.Matches(msg, k.Pane2):
@@ -914,6 +928,10 @@ func (m *Model) focusedFilter() filterable {
 		return &m.containers
 	case paneSecrets:
 		return &m.secrets
+	case paneDetail:
+		if m.fields.Shown() {
+			return &m.fields
+		}
 	}
 	return nil
 }
@@ -928,8 +946,12 @@ func (m *Model) move(delta int) {
 	case paneSecrets:
 		m.secrets.Move(delta)
 	case paneDetail:
+		if m.fields.Shown() {
+			m.fields.Move(delta)
+		} else {
 			m.detail.Scroll(delta)
 		}
+	}
 }
 
 func (m *Model) jump(top bool) {
@@ -948,6 +970,10 @@ func (m *Model) jump(top bool) {
 		m.secrets.Top()
 	case m.focus == paneSecrets:
 		m.secrets.Bottom()
+	case m.focus == paneDetail && m.fields.Shown() && top:
+		m.fields.Top()
+	case m.focus == paneDetail && m.fields.Shown():
+		m.fields.Bottom()
 	case m.focus == paneDetail && top:
 		m.detail.ScrollTop()
 	case m.focus == paneDetail:
@@ -1458,6 +1484,9 @@ func (m *Model) copyValue() tea.Cmd {
 		if a, ok := m.selectedAccount(); ok && a.Copy != "" && m.focus == paneSources {
 			return m.copyText(a.CopyLabel, a.Copy, false)
 		}
+		if f, ok := m.fields.Selected(); ok && m.focus == paneDetail && m.fields.Shown() {
+			return m.copyText(fieldName(f), f.Value, false)
+		}
 		return nil
 	}
 	if v, ok := m.detail.Value(); ok {
@@ -1583,7 +1612,7 @@ func (m Model) footerView() string {
 	} else if l != nil && l.Filtering() {
 		help = m.helpBar(keys.FilterHelp{Map: m.keys}.ShortHelp(), 2)
 	} else {
-		help = m.helpBar(contextHelp{k: m.keys, focus: m.focus, commands: len(m.commandsHere()) > 0}.ShortHelp(), 2)
+		help = m.helpBar(contextHelp{k: m.keys, focus: m.focus, commands: len(m.commandsHere()) > 0, account: m.fields.Shown()}.ShortHelp(), 2)
 	}
 	var lines []string
 	if !m.clipDeadline.IsZero() {

internal/ui/app/app_test.go

@@ -1099,3 +1099,58 @@ func TestAccountInDetails(t *testing.T) {
 		t.Errorf("still shown on a subscription:\n%s", d.screen())
 	}
 }
+
+// grouped is an account in two groups.
+type grouped struct{ described }
+
+func (grouped) Groups(context.Context) ([]string, error) {
+	return []string{"Platform team", "Vault readers"}, nil
+}
+
+func TestAccountPane(t *testing.T) {
+	t.Parallel()
+	d := newDriver(t, grouped{described{fake.Azure(0)}})
+	d.keys("g", "tab") // the account's row, then straight to its pane
+	if d.m.focus != paneDetail {
+		t.Fatalf("focus %v, want the fourth pane", d.m.focus)
+	}
+	scr := d.screen()
+	for _, want := range []string{"Alice Example", "groups 2", "Platform team", "Vault readers"} {
+		if !strings.Contains(scr, want) {
+			t.Errorf("missing %q:\n%s", want, scr)
+		}
+	}
+	bar := lastLine(scr)
+	if !strings.Contains(bar, "copy") || strings.Contains(bar, "reveal") || strings.Contains(bar, "versions") {
+		t.Errorf("help bar: %q", bar)
+	}
+	d.keys("j", "y")
+	if got := d.clip().content; got != "oid-123" {
+		t.Errorf("y on the object ID copied %q", got)
+	}
+	d.keys("G", "y")
+	if got := d.clip().content; got != "Vault readers" {
+		t.Errorf("y on a group copied %q", got)
+	}
+
+	// / filters it, labels too.
+	d.keys("/")
+	d.typeText("vault")
+	d.keys("enter")
+	if scr := d.screen(); !strings.Contains(scr, "Vault readers") || strings.Contains(scr, "Platform team") {
+		t.Errorf("filtered:\n%s", scr)
+	}
+	d.keys("y")
+	if got := d.clip().content; got != "Vault readers" {
+		t.Errorf("y in the filtered pane copied %q", got)
+	}
+	d.keys("esc")
+	if !strings.Contains(d.screen(), "Platform team") {
+		t.Errorf("filter not cleared:\n%s", d.screen())
+	}
+
+	d.keys("shift+tab")
+	if d.m.focus != paneSources {
+		t.Errorf("back to %v, want Sources", d.m.focus)
+	}
+}

internal/ui/app/fields.go

@@ -0,0 +1,90 @@
+package app
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+
+	tea "charm.land/bubbletea/v2"
+
+	"git.kebcloud.no/keb/lazysecrets/internal/provider"
+	"git.kebcloud.no/keb/lazysecrets/internal/ui/panes"
+)
+
+// The fourth pane shows Fields for anything but a secret. On a provider's
+// row: its account, from what the provider knows locally, then the
+// groups the account is in, loaded once a session when first shown.
+
+type groupsState struct {
+	names   []string
+	err     error
+	loading bool
+}
+
+type groupsMsg struct {
+	provider string
+	names    []string
+	err      error
+}
+
+// syncFields fills the Fields pane for what's selected, loading an
+// account's groups the first time.
+func (m *Model) syncFields() tea.Cmd {
+	acct, ok := m.selectedAccount()
+	if !ok {
+		m.fields.Set("", nil)
+		return nil
+	}
+	r, _ := m.sources.Selected()
+	var fields []panes.Field
+	for _, f := range acct.Fields {
+		fields = append(fields, panes.Field{Label: f.Label, Value: f.Value})
+	}
+	var cmd tea.Cmd
+	if g, ok := m.byID[r.provider].(provider.AccountGroups); ok {
+		st, seen := m.groups[r.provider]
+		if !seen {
+			st = groupsState{loading: true}
+			m.groups[r.provider] = st
+			id, timeout := r.provider, m.timeout
+			cmd = func() tea.Msg {
+				ctx, cancel := context.WithTimeout(context.Background(), timeout)
+				defer cancel()
+				names, err := g.Groups(ctx)
+				return groupsMsg{provider: id, names: names, err: err}
+			}
+		}
+		fields = append(fields, groupFields(st)...)
+	}
+	m.fields.Set(m.byID[r.provider].Label(), fields)
+	return cmd
+}
+
+// fieldName names a copied field: its label, or for a group, the group.
+func fieldName(f panes.Field) string {
+	if f.Label == "" || strings.HasPrefix(f.Label, "groups") {
+		return "group " + f.Value
+	}
+	return f.Label
+}
+
+// groupFields are the groups' rows: labelled on the first.
+func groupFields(st groupsState) []panes.Field {
+	switch {
+	case st.loading:
+		return []panes.Field{{Label: "groups", Value: "loading…", Info: true}}
+	case errors.Is(st.err, provider.ErrUnsupported):
+		return nil
+	case st.err != nil:
+		return []panes.Field{{Label: "groups", Value: "couldn't list them: " + st.err.Error(), Info: true}}
+	case len(st.names) == 0:
+		return []panes.Field{{Label: "groups", Value: "none", Info: true}}
+	}
+	out := make([]panes.Field, len(st.names))
+	for i, n := range st.names {
+		out[i] = panes.Field{Value: n}
+	}
+	out[0].Label = fmt.Sprintf("groups %d", len(st.names))
+	return out
+}

internal/ui/app/help.go

@@ -36,6 +36,7 @@ type contextHelp struct {
 	k        keys.Map
 	focus    pane
 	commands bool // custom commands apply here
+	account  bool // the fourth pane describes an account (fields.go)
 }
 
 func (c contextHelp) ShortHelp() []key.Binding {
@@ -44,6 +45,10 @@ func (c contextHelp) ShortHelp() []key.Binding {
 	if k.Login.Enabled() {
 		b = append(b, k.Login)
 	}
+	if c.focus == paneDetail && c.account {
+		copyField := key.NewBinding(key.WithKeys(k.Copy.Keys()...), key.WithHelp(k.Copy.Help().Key, "copy"))
+		return append(b, k.Up, k.Down, copyField, k.Filter, k.Help, k.Quit)
+	}
 	switch c.focus {
 	case paneSources:
 		b = append(b, k.Enter, k.Search, k.Share, k.ShareMenu, k.Favourite, k.Favourites, k.Note, k.Filter)

internal/ui/app/layout.go

@@ -166,6 +166,7 @@ func (m *Model) layout() {
 	m.containers.SetSize(leftW, h[1])
 	m.secrets.SetSize(leftW, h[2])
 	m.detail.SetSize(m.w-leftW, avail)
+	m.fields.SetSize(m.w-leftW, avail)
 }
 
 // active reports whether p is drawn focused: it has focus and the terminal
@@ -179,7 +180,12 @@ func (m Model) panesView() string {
 		func() string { return m.sources.View(m.st, m.active(paneSources), spin) },
 		func() string { return m.containers.View(m.st, m.active(paneContainers), spin) },
 		func() string { return m.secrets.View(m.st, m.active(paneSecrets), spin) },
-		func() string { return m.detail.View(m.st, m.active(paneDetail), spin) },
+		func() string {
+			if m.fields.Shown() {
+				return m.fields.View(m.st, m.active(paneDetail), spin)
+			}
+			return m.detail.View(m.st, m.active(paneDetail), spin)
+		},
 	}
 	if m.zoom == zoomFull {
 		return views[m.focus]()

internal/ui/panes/detail.go

@@ -47,7 +47,6 @@ type Detail struct {
 	versions []provider.Object // newest first; nil while unknown
 	note     string            // the user's note on what's shown
 	message  string            // shown instead of the hint when nothing is selected: an error
-	account  []provider.Attr   // shown instead of the hint on a provider's row: who it signs in as
 
 	offset int
 	w, h   int
@@ -77,10 +76,6 @@ func (d *Detail) Clear() {
 // selected, such as why an account has nothing to show; "" for the hint.
 func (d *Detail) SetMessage(s string) { d.message = s }
 
-// SetAccount sets the account shown on a provider's row when nothing is
-// selected; nil for the hint.
-func (d *Detail) SetAccount(fields []provider.Attr) { d.account = fields }
-
 // SetDescribing marks extra metadata as being fetched.
 func (d *Detail) SetDescribing() { d.describing, d.describeErr = true, nil }
 
@@ -196,12 +191,6 @@ func (d Detail) lines(st styles.Styles) []string {
 	muted := st.Muted.Render
 
 	if d.container == nil {
-		if d.message == "" && len(d.account) > 0 {
-			for _, a := range d.account {
-				field(a.Label, a.Value)
-			}
-			return out
-		}
 		if d.message != "" {
 			for _, l := range strings.Split(ansi.Hardwrap(d.message, max(1, inner-2), true), "\n") {
 				out = append(out, " "+st.Error.Render(l))

internal/ui/panes/fields.go

@@ -0,0 +1,67 @@
+package panes
+
+import (
+	"fmt"
+
+	"github.com/charmbracelet/x/ansi"
+
+	"git.kebcloud.no/keb/lazysecrets/internal/ui/styles"
+)
+
+// Fields is the fourth pane for anything but a secret (an account, and
+// what describes vaults, scopes and files): labelled values, one per row,
+// a label on the first of several values, to move through, filter and
+// copy from. It's a List, so / filters it like the other panes. Secrets
+// have Detail, for revealing and versions.
+type Fields struct {
+	List[Field]
+}
+
+// Field is a row: a value under a label. Info rows (loading, errors)
+// can't be copied.
+type Field struct {
+	Label, Value string
+	Info         bool
+}
+
+func NewFields() Fields {
+	l := NewList("", Item[Field]{
+		ID:     func(f Field) string { return f.Label + "\x00" + f.Value },
+		Filter: func(f Field) string { return f.Value },
+		// "/tenant" finds the tenant's rows.
+		FilterExtra: func(f Field) string { return f.Label },
+		Render: func(st styles.Styles, f Field, width int) string {
+			value := f.Value
+			if f.Info {
+				value = st.Muted.Render(value)
+			}
+			return ansi.Truncate(st.Label.Render(fmt.Sprintf("%-10s", f.Label))+" "+value, width, "…")
+		},
+	})
+	l.Empty = "nothing to show"
+	return Fields{l}
+}
+
+// Set shows fields under title. Another title (another account or vault)
+// starts over, without a filter.
+func (s *Fields) Set(title string, fields []Field) {
+	if title != s.Title {
+		s.Reset()
+		s.Title = title
+	}
+	if len(fields) > 0 || len(s.Items()) > 0 {
+		s.SetItems(fields)
+	}
+}
+
+// Shown reports whether there's anything to show.
+func (s Fields) Shown() bool { return len(s.Items()) > 0 }
+
+// Selected is the field under the cursor, unless it's an info row.
+func (s Fields) Selected() (Field, bool) {
+	f, ok := s.List.Selected()
+	if !ok || f.Info {
+		return Field{}, false
+	}
+	return f, true
+}