Pierre-Olivier Mercier
9c0ca254f5
Display the postqueue failure reason right-aligned in red on the message header line so it's immediately visible when viewing a message. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
475 lines
13 KiB
Go
475 lines
13 KiB
Go
package main
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import (
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"bytes"
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"fmt"
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"strings"
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"github.com/charmbracelet/bubbles/list"
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"github.com/charmbracelet/bubbles/progress"
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"github.com/charmbracelet/bubbles/textinput"
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"github.com/charmbracelet/bubbles/viewport"
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tea "github.com/charmbracelet/bubbletea"
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"github.com/charmbracelet/lipgloss"
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"github.com/charmbracelet/x/ansi"
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)
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// ── App state ─────────────────────────────────────────────────────────────────
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type appState int
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const (
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stateList appState = iota
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stateMessage appState = iota
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stateParts appState = iota
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statePartView appState = iota
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)
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// ── Model ─────────────────────────────────────────────────────────────────────
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type Model struct {
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state appState
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list list.Model
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progress progress.Model
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viewport viewport.Model
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entries []QueueEntry
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entryIndex map[string]int // queue ID → entries index
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loadingTotal int
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loadingDone int
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currentRaw string
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currentID string
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showFullHeaders bool
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err error
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saveNotice string
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width int
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height int
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messageSaving bool
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// stateParts fields
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parts []MessagePart
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partsCursor int
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partsSaving bool
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partsSaveInput textinput.Model
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partSaveNotice string
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}
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func initialModel() Model {
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l := list.New(nil, itemDelegate{}, 80, 20)
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l.Title = "Postfix Queue"
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l.SetShowStatusBar(false)
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l.SetFilteringEnabled(false)
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l.Styles.Title = titleStyle
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l.SetShowHelp(false)
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prog := progress.New(
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progress.WithDefaultGradient(),
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progress.WithoutPercentage(),
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)
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vp := viewport.New(80, 20)
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ti := textinput.New()
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ti.Placeholder = "filename"
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ti.CharLimit = 255
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return Model{
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state: stateList,
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list: l,
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progress: prog,
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viewport: vp,
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partsSaveInput: ti,
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}
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}
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// refreshViewport re-renders the current message and sets wrapped content.
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func (m *Model) refreshViewport() {
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rendered := renderMessage(m.currentRaw, m.showFullHeaders)
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headerSection, body, _ := strings.Cut(rendered, "\n\n")
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var result []string
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for line := range strings.SplitSeq(headerSection, "\n") {
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parts := strings.Split(ansi.Wrap(line, m.viewport.Width-4, ""), "\n")
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result = append(result, parts[0])
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for _, continuation := range parts[1:] {
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result = append(result, " "+continuation)
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}
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}
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result = append(result, "")
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result = append(result, strings.Split(ansi.Wrap(body, m.viewport.Width, ""), "\n")...)
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m.viewport.SetContent(strings.Join(result, "\n"))
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}
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// ── Init ──────────────────────────────────────────────────────────────────────
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func (m Model) Init() tea.Cmd {
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return loadQueueCmd()
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}
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// ── Update ────────────────────────────────────────────────────────────────────
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func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
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switch msg := msg.(type) {
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case tea.WindowSizeMsg:
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m.width = msg.Width
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m.height = msg.Height
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m.progress.Width = msg.Width - 4
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m.list.SetSize(msg.Width, msg.Height-2)
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m.viewport.Width = msg.Width
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m.viewport.Height = msg.Height - 2
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if m.state == stateMessage && m.currentRaw != "" {
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m.refreshViewport()
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} else if m.state == statePartView && len(m.parts) > 0 {
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p := m.parts[m.partsCursor]
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content := ansi.Wrap(renderPart(p.CT, "", "", bytes.NewReader(p.Data)), m.viewport.Width, "")
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m.viewport.SetContent(content)
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}
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return m, nil
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case queueParsedMsg:
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m.entries = msg.entries
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m.entryIndex = make(map[string]int, len(msg.entries))
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m.loadingTotal = len(msg.entries)
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m.loadingDone = 0
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m.err = nil
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items := make([]list.Item, len(msg.entries))
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for i, e := range msg.entries {
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items[i] = queueItem{e}
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m.entryIndex[e.ID] = i
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}
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m.list.SetItems(items)
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if m.loadingTotal == 0 {
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return m, nil
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}
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cmds := make([]tea.Cmd, len(msg.entries))
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for i, e := range msg.entries {
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cmds[i] = fetchSubjectCmd(e.ID)
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}
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return m, tea.Batch(cmds...)
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case subjectFetchedMsg:
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if idx, ok := m.entryIndex[msg.id]; ok {
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m.entries[idx].Subject = msg.subject
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m.list.SetItem(idx, queueItem{m.entries[idx]})
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}
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m.loadingDone++
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pct := float64(m.loadingDone) / float64(m.loadingTotal)
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return m, m.progress.SetPercent(pct)
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case progress.FrameMsg:
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pm, cmd := m.progress.Update(msg)
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m.progress = pm.(progress.Model)
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return m, cmd
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case queueErrMsg:
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m.err = msg.err
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return m, nil
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case messageLoadedMsg:
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m.currentRaw = msg.content
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m.currentID = msg.id
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m.showFullHeaders = false
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m.refreshViewport()
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m.viewport.GotoTop()
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m.state = stateMessage
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return m, nil
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case messageErrMsg:
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m.err = msg.err
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return m, nil
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case savedMsg:
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m.saveNotice = "Saved: " + msg.path
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return m, nil
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case saveErrMsg:
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m.saveNotice = "Save error: " + msg.err.Error()
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return m, nil
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case partSavedMsg:
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m.partSaveNotice = "Saved: " + msg.path
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return m, nil
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case partSaveErrMsg:
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m.partSaveNotice = "Save error: " + msg.err.Error()
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return m, nil
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case tea.KeyMsg:
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switch m.state {
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case stateList:
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switch msg.String() {
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case "q", "ctrl+c":
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return m, tea.Quit
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case "r":
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m.entries = nil
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m.entryIndex = nil
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m.loadingTotal = 0
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m.loadingDone = 0
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m.list.SetItems(nil)
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_ = m.progress.SetPercent(0)
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return m, loadQueueCmd()
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case "enter":
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if item, ok := m.list.SelectedItem().(queueItem); ok {
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return m, loadMessageCmd(item.entry.ID)
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}
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}
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case stateMessage:
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if m.messageSaving {
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switch msg.String() {
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case "esc":
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m.messageSaving = false
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m.partsSaveInput.Blur()
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return m, nil
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case "enter":
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name := strings.TrimSpace(m.partsSaveInput.Value())
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content := m.currentRaw
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m.messageSaving = false
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m.partsSaveInput.Blur()
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return m, saveMessageAsCmd(content, name)
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default:
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var cmd tea.Cmd
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m.partsSaveInput, cmd = m.partsSaveInput.Update(msg)
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return m, cmd
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}
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}
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switch msg.String() {
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case "q":
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m.state = stateList
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m.saveNotice = ""
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return m, nil
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case "ctrl+c":
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return m, tea.Quit
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case "s":
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m.messageSaving = true
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m.saveNotice = ""
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m.partsSaveInput.SetValue(m.currentID + ".eml")
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m.partsSaveInput.CursorEnd()
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m.partsSaveInput.Focus()
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return m, textinput.Blink
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case "H":
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m.showFullHeaders = !m.showFullHeaders
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m.refreshViewport()
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m.viewport.GotoTop()
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return m, nil
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case "v":
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m.parts = extractParts(m.currentRaw)
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m.partsCursor = 0
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m.partsSaving = false
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m.partSaveNotice = ""
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m.partsSaveInput.SetValue("")
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m.partsSaveInput.Blur()
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m.state = stateParts
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return m, nil
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}
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var cmd tea.Cmd
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m.viewport, cmd = m.viewport.Update(msg)
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return m, cmd
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case stateParts:
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if m.partsSaving {
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switch msg.String() {
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case "esc":
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m.partsSaving = false
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m.partsSaveInput.Blur()
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return m, nil
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case "enter":
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name := strings.TrimSpace(m.partsSaveInput.Value())
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part := m.parts[m.partsCursor]
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m.partsSaving = false
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m.partsSaveInput.Blur()
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return m, savePartCmd(part.Data, name)
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default:
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var cmd tea.Cmd
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m.partsSaveInput, cmd = m.partsSaveInput.Update(msg)
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return m, cmd
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}
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}
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switch msg.String() {
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case "q", "esc":
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m.state = stateMessage
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m.partSaveNotice = ""
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return m, nil
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case "ctrl+c":
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return m, tea.Quit
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case "up", "k":
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if m.partsCursor > 0 {
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m.partsCursor--
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}
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return m, nil
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case "down", "j":
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if m.partsCursor < len(m.parts)-1 {
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m.partsCursor++
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}
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return m, nil
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case "enter":
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if len(m.parts) > 0 {
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p := m.parts[m.partsCursor]
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if strings.HasPrefix(p.MediaType, "text/") {
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content := ansi.Wrap(renderPart(p.CT, "", "", bytes.NewReader(p.Data)), m.viewport.Width, "")
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m.viewport.SetContent(content)
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m.viewport.GotoTop()
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m.state = statePartView
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return m, nil
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}
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}
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case "s":
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if len(m.parts) > 0 {
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m.partsSaving = true
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m.partSaveNotice = ""
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m.partsSaveInput.SetValue(m.parts[m.partsCursor].Name)
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m.partsSaveInput.CursorEnd()
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m.partsSaveInput.Focus()
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return m, textinput.Blink
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}
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}
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case statePartView:
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switch msg.String() {
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case "q", "esc":
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m.state = stateParts
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return m, nil
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case "ctrl+c":
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return m, tea.Quit
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}
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var cmd tea.Cmd
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m.viewport, cmd = m.viewport.Update(msg)
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return m, cmd
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}
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}
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var cmd tea.Cmd
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switch m.state {
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case stateList:
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m.list, cmd = m.list.Update(msg)
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case stateMessage:
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m.viewport, cmd = m.viewport.Update(msg)
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}
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return m, cmd
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}
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// ── View ──────────────────────────────────────────────────────────────────────
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func (m Model) View() string {
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if m.err != nil {
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return errorStyle.Render("Error: "+m.err.Error()) + "\n\nPress q to quit."
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}
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switch m.state {
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case stateList:
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if m.entries == nil {
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return titleStyle.Render("Postfix Queue") + "\n\n" +
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dimStyle.Render(" Fetching queue list…")
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}
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return m.list.View() + "\n" + m.renderBottom()
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case stateMessage:
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title := titleStyle.Render(fmt.Sprintf("Message: %s", m.currentID))
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header := title
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if idx, ok := m.entryIndex[m.currentID]; ok {
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if reason := m.entries[idx].Reason; reason != "" {
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gap := m.width - lipgloss.Width(title) - lipgloss.Width(reason) - 2
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if gap < 1 {
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gap = 1
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}
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header = title + strings.Repeat(" ", gap) + reasonStyle.Render(reason)
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}
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}
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scrollPct := int(m.viewport.ScrollPercent() * 100)
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headersHint := "H: full headers"
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if m.showFullHeaders {
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headersHint = "H: short headers"
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}
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status := statusBarStyle.Render(
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fmt.Sprintf(" ↑↓/SPC/PgUp/Dn: scroll │ s: save EML │ v: parts │ %s │ q: back │ %d%% ", headersHint, scrollPct),
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)
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notice := ""
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if m.messageSaving {
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notice = "\n Save as: " + m.partsSaveInput.View()
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} else if m.saveNotice != "" {
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notice = "\n" + saveNoticeStyle.Render(m.saveNotice)
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}
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return header + "\n" + m.viewport.View() + "\n" + status + notice
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case stateParts:
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title := titleStyle.Render(fmt.Sprintf("Parts: %s", m.currentID))
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// Compute name column width from remaining terminal space.
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// Columns: #(3) + gap(2) + CT(30) + gap(2) + size(10) + gap(2) = 49
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nameW := m.width - 49
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if nameW < 8 {
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nameW = 8
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}
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header := dimStyle.Render(fmt.Sprintf(
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"%-3s %-30s %-*s %10s",
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"#", "Content-Type", nameW, "Name", "Size",
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))
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var rows strings.Builder
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for i, p := range m.parts {
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name := p.Name
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if name == "" {
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name = "-"
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}
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if len(name) > nameW {
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name = name[:nameW-1] + "…"
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}
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line := fmt.Sprintf(
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"%-3d %-30s %-*s %10s",
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p.Index, p.MediaType, nameW, name, formatSize(p.Size),
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)
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if i == m.partsCursor {
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rows.WriteString(selectedStyle.Render(line))
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} else {
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rows.WriteString(line)
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}
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rows.WriteByte('\n')
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}
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if len(m.parts) == 0 {
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rows.WriteString(dimStyle.Render(" (no parts found)"))
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rows.WriteByte('\n')
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}
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status := statusBarStyle.Render(" ↑↓/j/k: navigate │ enter: view text part │ s: save part │ q/esc: back ")
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bottom := ""
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if m.partsSaving {
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bottom = "\n Save as: " + m.partsSaveInput.View()
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} else if m.partSaveNotice != "" {
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bottom = "\n" + saveNoticeStyle.Render(m.partSaveNotice)
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}
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return title + "\n" + header + "\n" + rows.String() + status + bottom
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case statePartView:
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p := m.parts[m.partsCursor]
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title := titleStyle.Render(fmt.Sprintf("Part %d: %s", p.Index, p.MediaType))
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scrollPct := int(m.viewport.ScrollPercent() * 100)
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status := statusBarStyle.Render(
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fmt.Sprintf(" ↑↓/SPC/PgUp/Dn: scroll │ q/esc: back to parts │ %d%% ", scrollPct),
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)
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return title + "\n" + m.viewport.View() + "\n" + status
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}
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return ""
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}
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func (m Model) renderBottom() string {
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if m.loadingDone < m.loadingTotal {
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label := fmt.Sprintf(" Fetching subjects: %d / %d ", m.loadingDone, m.loadingTotal)
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return dimStyle.Render(label) + "\n " + m.progress.View()
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}
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status := statusBarStyle.Render(
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fmt.Sprintf(" %d message(s) │ Enter: open │ r: refresh │ q: quit ", len(m.list.Items())),
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)
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if item, ok := m.list.SelectedItem().(queueItem); ok {
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if reason := item.entry.Reason; reason != "" {
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return status + "\n " + reasonStyle.Render(reason)
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}
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}
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return status
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}
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