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

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
+}