package app import ( "errors" "fmt" "io" "net/url" "os/exec" "sort" "strings" "time" "git.sr.ht/~rjarry/go-opt" "github.com/ProtonMail/go-crypto/openpgp" "github.com/emersion/go-message/mail" "github.com/gdamore/tcell/v2" "git.sr.ht/~rjarry/aerc/config" "git.sr.ht/~rjarry/aerc/lib" "git.sr.ht/~rjarry/aerc/lib/crypto" "git.sr.ht/~rjarry/aerc/lib/ui" "git.sr.ht/~rjarry/aerc/log" "git.sr.ht/~rjarry/aerc/models" "git.sr.ht/~rjarry/aerc/worker/types" ) type Aerc struct { accounts map[string]*AccountView cmd func(string, *config.AccountConfig, *models.MessageInfo) error cmdHistory lib.History complete func(cmd string) ([]string, string) focused ui.Interactive grid *ui.Grid simulating int statusbar *ui.Stack statusline *StatusLine pasting bool pendingKeys []config.KeyStroke prompts *ui.Stack tabs *ui.Tabs beep func() error dialog ui.DrawableInteractive Crypto crypto.Provider } type Choice struct { Key string Text string Command string } func (aerc *Aerc) Init( crypto crypto.Provider, cmd func(string, *config.AccountConfig, *models.MessageInfo) error, complete func(cmd string) ([]string, string), cmdHistory lib.History, deferLoop chan struct{}, ) { tabs := ui.NewTabs(config.Ui) statusbar := ui.NewStack(config.Ui) statusline := &StatusLine{} statusbar.Push(statusline) grid := ui.NewGrid().Rows([]ui.GridSpec{ {Strategy: ui.SIZE_EXACT, Size: ui.Const(1)}, {Strategy: ui.SIZE_WEIGHT, Size: ui.Const(1)}, {Strategy: ui.SIZE_EXACT, Size: ui.Const(1)}, }).Columns([]ui.GridSpec{ {Strategy: ui.SIZE_WEIGHT, Size: ui.Const(1)}, }) grid.AddChild(tabs.TabStrip) grid.AddChild(tabs.TabContent).At(1, 0) grid.AddChild(statusbar).At(2, 0) aerc.accounts = make(map[string]*AccountView) aerc.cmd = cmd aerc.cmdHistory = cmdHistory aerc.complete = complete aerc.grid = grid aerc.statusbar = statusbar aerc.statusline = statusline aerc.prompts = ui.NewStack(config.Ui) aerc.tabs = tabs aerc.Crypto = crypto for _, acct := range config.Accounts { view, err := NewAccountView(acct, deferLoop) if err != nil { tabs.Add(errorScreen(err.Error()), acct.Name, nil) } else { aerc.accounts[acct.Name] = view view.tab = tabs.Add(view, acct.Name, view.UiConfig()) } } if len(config.Accounts) == 0 { wizard := NewAccountWizard() wizard.Focus(true) aerc.NewTab(wizard, "New account") } tabs.Select(0) tabs.CloseTab = func(index int) { tab := aerc.tabs.Get(index) if tab == nil { return } switch content := tab.Content.(type) { case *AccountView: return case *AccountWizard: return default: aerc.RemoveTab(content, true) } } aerc.showConfigWarnings() } func (aerc *Aerc) showConfigWarnings() { var dialogs []ui.DrawableInteractive callback := func(string, error) { aerc.CloseDialog() if len(dialogs) > 0 { d := dialogs[0] dialogs = dialogs[1:] aerc.AddDialog(d) } } for _, w := range config.Warnings { dialogs = append(dialogs, NewSelectorDialog( w.Title, w.Body, []string{"OK"}, 0, aerc.SelectedAccountUiConfig(), callback, )) } callback("", nil) } func (aerc *Aerc) OnBeep(f func() error) { aerc.beep = f } func (aerc *Aerc) Beep() { if aerc.beep == nil { log.Warnf("should beep, but no beeper") return } if err := aerc.beep(); err != nil { log.Errorf("tried to beep, but could not: %v", err) } } func (aerc *Aerc) HandleMessage(msg types.WorkerMessage) { if acct, ok := aerc.accounts[msg.Account()]; ok { acct.onMessage(msg) } } func (aerc *Aerc) Invalidate() { ui.Invalidate() } func (aerc *Aerc) Focus(focus bool) { // who cares } func (aerc *Aerc) Draw(ctx *ui.Context) { if len(aerc.prompts.Children()) > 0 { previous := aerc.focused prompt := aerc.prompts.Pop().(*ExLine) prompt.finish = func() { aerc.statusbar.Pop() aerc.focus(previous) } aerc.statusbar.Push(prompt) aerc.focus(prompt) } aerc.grid.Draw(ctx) if aerc.dialog != nil { if w, h := ctx.Width(), ctx.Height(); w > 8 && h > 4 { if d, ok := aerc.dialog.(Dialog); ok { start, height := d.ContextHeight() aerc.dialog.Draw( ctx.Subcontext(4, start(h), w-8, height(h))) } else { aerc.dialog.Draw(ctx.Subcontext(4, h/2-2, w-8, 4)) } } } } func (aerc *Aerc) HumanReadableBindings() []string { var result []string binds := aerc.getBindings() format := func(s string) string { return strings.ReplaceAll(s, "%", "%%") } fmtStr := "%10s %s" for _, bind := range binds.Bindings { result = append(result, fmt.Sprintf(fmtStr, format(config.FormatKeyStrokes(bind.Input)), format(config.FormatKeyStrokes(bind.Output)), )) } if binds.Globals && config.Binds.Global != nil { for _, bind := range config.Binds.Global.Bindings { result = append(result, fmt.Sprintf(fmtStr+" (Globals)", format(config.FormatKeyStrokes(bind.Input)), format(config.FormatKeyStrokes(bind.Output)), )) } } result = append(result, fmt.Sprintf(fmtStr, "$ex", fmt.Sprintf("'%c'", binds.ExKey.Rune), )) result = append(result, fmt.Sprintf(fmtStr, "Globals", fmt.Sprintf("%v", binds.Globals), )) sort.Strings(result) return result } func (aerc *Aerc) getBindings() *config.KeyBindings { selectedAccountName := "" if aerc.SelectedAccount() != nil { selectedAccountName = aerc.SelectedAccount().acct.Name } switch view := aerc.SelectedTabContent().(type) { case *AccountView: binds := config.Binds.MessageList.ForAccount(selectedAccountName) return binds.ForFolder(view.SelectedDirectory()) case *AccountWizard: return config.Binds.AccountWizard case *Composer: var binds *config.KeyBindings switch view.Bindings() { case "compose::editor": binds = config.Binds.ComposeEditor.ForAccount( selectedAccountName) case "compose::review": binds = config.Binds.ComposeReview.ForAccount( selectedAccountName) default: binds = config.Binds.Compose.ForAccount( selectedAccountName) } return binds.ForFolder(view.SelectedDirectory()) case *MessageViewer: switch view.Bindings() { case "view::passthrough": return config.Binds.MessageViewPassthrough.ForAccount( selectedAccountName) default: return config.Binds.MessageView.ForAccount( selectedAccountName) } case *Terminal: return config.Binds.Terminal default: return config.Binds.Global } } func (aerc *Aerc) simulate(strokes []config.KeyStroke) { aerc.pendingKeys = []config.KeyStroke{} bindings := aerc.getBindings() complete := aerc.SelectedAccountUiConfig().CompletionMinChars != config.MANUAL_COMPLETE aerc.simulating += 1 for _, stroke := range strokes { simulated := tcell.NewEventKey( stroke.Key, stroke.Rune, stroke.Modifiers) aerc.Event(simulated) complete = stroke == bindings.CompleteKey } aerc.simulating -= 1 if exline, ok := aerc.focused.(*ExLine); ok { // we are still focused on the exline, turn on tab complete exline.TabComplete(func(cmd string) ([]string, string) { return aerc.complete(cmd) }) if complete { // force completion now exline.Event(tcell.NewEventKey( bindings.CompleteKey.Key, bindings.CompleteKey.Rune, bindings.CompleteKey.Modifiers)) } } } func (aerc *Aerc) Event(event tcell.Event) bool { if aerc.dialog != nil { return aerc.dialog.Event(event) } if aerc.focused != nil { return aerc.focused.Event(event) } switch event := event.(type) { case *tcell.EventKey: // If we are in a bracketed paste, don't process the keys for // bindings if aerc.pasting { interactive, ok := aerc.SelectedTabContent().(ui.Interactive) if ok { return interactive.Event(event) } return false } aerc.statusline.Expire() aerc.pendingKeys = append(aerc.pendingKeys, config.KeyStroke{ Modifiers: event.Modifiers(), Key: event.Key(), Rune: event.Rune(), }) ui.Invalidate() bindings := aerc.getBindings() incomplete := false result, strokes := bindings.GetBinding(aerc.pendingKeys) switch result { case config.BINDING_FOUND: aerc.simulate(strokes) return true case config.BINDING_INCOMPLETE: incomplete = true case config.BINDING_NOT_FOUND: } if bindings.Globals { result, strokes = config.Binds.Global.GetBinding(aerc.pendingKeys) switch result { case config.BINDING_FOUND: aerc.simulate(strokes) return true case config.BINDING_INCOMPLETE: incomplete = true case config.BINDING_NOT_FOUND: } } if !incomplete { aerc.pendingKeys = []config.KeyStroke{} exKey := bindings.ExKey if aerc.simulating > 0 { // Keybindings still use : even if you change the ex key exKey = config.Binds.Global.ExKey } if aerc.isExKey(event, exKey) { aerc.BeginExCommand("") return true } interactive, ok := aerc.SelectedTabContent().(ui.Interactive) if ok { return interactive.Event(event) } return false } case *tcell.EventMouse: x, y := event.Position() aerc.grid.MouseEvent(x, y, event) return true case *tcell.EventPaste: if event.Start() { aerc.pasting = true } if event.End() { aerc.pasting = false } interactive, ok := aerc.SelectedTabContent().(ui.Interactive) if ok { return interactive.Event(event) } return false } return false } func (aerc *Aerc) SelectedAccount() *AccountView { return aerc.account(aerc.SelectedTabContent()) } func (aerc *Aerc) Account(name string) (*AccountView, error) { if acct, ok := aerc.accounts[name]; ok { return acct, nil } return nil, fmt.Errorf("account <%s> not found", name) } func (aerc *Aerc) PrevAccount() (*AccountView, error) { cur := aerc.SelectedAccount() if cur == nil { return nil, fmt.Errorf("no account selected, cannot get prev") } for i, conf := range config.Accounts { if conf.Name == cur.Name() { i -= 1 if i == -1 { i = len(config.Accounts) - 1 } conf = config.Accounts[i] return aerc.Account(conf.Name) } } return nil, fmt.Errorf("no prev account") } func (aerc *Aerc) NextAccount() (*AccountView, error) { cur := aerc.SelectedAccount() if cur == nil { return nil, fmt.Errorf("no account selected, cannot get next") } for i, conf := range config.Accounts { if conf.Name == cur.Name() { i += 1 if i == len(config.Accounts) { i = 0 } conf = config.Accounts[i] return aerc.Account(conf.Name) } } return nil, fmt.Errorf("no next account") } func (aerc *Aerc) AccountNames() []string { results := make([]string, 0) for name := range aerc.accounts { results = append(results, name) } return results } func (aerc *Aerc) account(d ui.Drawable) *AccountView { switch tab := d.(type) { case *AccountView: return tab case *MessageViewer: return tab.SelectedAccount() case *Composer: return tab.Account() } return nil } func (aerc *Aerc) SelectedAccountUiConfig() *config.UIConfig { acct := aerc.SelectedAccount() if acct == nil { return config.Ui } return acct.UiConfig() } func (aerc *Aerc) SelectedTabContent() ui.Drawable { tab := aerc.tabs.Selected() if tab == nil { return nil } return tab.Content } func (aerc *Aerc) SelectedTab() *ui.Tab { return aerc.tabs.Selected() } func (aerc *Aerc) NewTab(clickable ui.Drawable, name string) *ui.Tab { uiConf := config.Ui if acct := aerc.account(clickable); acct != nil { uiConf = acct.UiConfig() } tab := aerc.tabs.Add(clickable, name, uiConf) aerc.UpdateStatus() return tab } func (aerc *Aerc) RemoveTab(tab ui.Drawable, closeContent bool) { aerc.tabs.Remove(tab) aerc.UpdateStatus() if content, ok := tab.(ui.Closeable); ok && closeContent { content.Close() } } func (aerc *Aerc) ReplaceTab(tabSrc ui.Drawable, tabTarget ui.Drawable, name string, closeSrc bool) { aerc.tabs.Replace(tabSrc, tabTarget, name) if content, ok := tabSrc.(ui.Closeable); ok && closeSrc { content.Close() } } func (aerc *Aerc) MoveTab(i int, relative bool) { aerc.tabs.MoveTab(i, relative) } func (aerc *Aerc) PinTab() { aerc.tabs.PinTab() } func (aerc *Aerc) UnpinTab() { aerc.tabs.UnpinTab() } func (aerc *Aerc) NextTab() { aerc.tabs.NextTab() } func (aerc *Aerc) PrevTab() { aerc.tabs.PrevTab() } func (aerc *Aerc) SelectTab(name string) bool { ok := aerc.tabs.SelectName(name) if ok { aerc.UpdateStatus() } return ok } func (aerc *Aerc) SelectTabIndex(index int) bool { ok := aerc.tabs.Select(index) if ok { aerc.UpdateStatus() } return ok } func (aerc *Aerc) SelectTabAtOffset(offset int) { aerc.tabs.SelectOffset(offset) } func (aerc *Aerc) TabNames() []string { return aerc.tabs.Names() } func (aerc *Aerc) SelectPreviousTab() bool { return aerc.tabs.SelectPrevious() } func (aerc *Aerc) UpdateStatus() { if acct := aerc.SelectedAccount(); acct != nil { aerc.statusline.Update(acct) } else { aerc.statusline.Clear() } } func (aerc *Aerc) SetError(err string) { aerc.statusline.SetError(err) } func (aerc *Aerc) PushStatus(text string, expiry time.Duration) *StatusMessage { return aerc.statusline.Push(text, expiry) } func (aerc *Aerc) PushError(text string) *StatusMessage { return aerc.statusline.PushError(text) } func (aerc *Aerc) PushWarning(text string) *StatusMessage { return aerc.statusline.PushWarning(text) } func (aerc *Aerc) PushSuccess(text string) *StatusMessage { return aerc.statusline.PushSuccess(text) } func (aerc *Aerc) focus(item ui.Interactive) { if aerc.focused == item { return } if aerc.focused != nil { aerc.focused.Focus(false) } aerc.focused = item interactive, ok := aerc.SelectedTabContent().(ui.Interactive) if item != nil { item.Focus(true) if ok { interactive.Focus(false) } } else if ok { interactive.Focus(true) } } func (aerc *Aerc) BeginExCommand(cmd string) { previous := aerc.focused var tabComplete func(string) ([]string, string) if aerc.simulating != 0 { // Don't try to draw completions for simulated events tabComplete = nil } else { tabComplete = func(cmd string) ([]string, string) { return aerc.complete(cmd) } } exline := NewExLine(cmd, func(cmd string) { err := aerc.cmd(cmd, nil, nil) if err != nil { aerc.PushError(err.Error()) } // only add to history if this is an unsimulated command, // ie one not executed from a keybinding if aerc.simulating == 0 { aerc.cmdHistory.Add(cmd) } }, func() { aerc.statusbar.Pop() aerc.focus(previous) }, tabComplete, aerc.cmdHistory) aerc.statusbar.Push(exline) aerc.focus(exline) } func (aerc *Aerc) PushPrompt(prompt *ExLine) { aerc.prompts.Push(prompt) } func (aerc *Aerc) RegisterPrompt(prompt string, cmd string) { p := NewPrompt(prompt, func(text string) { if text != "" { cmd += " " + opt.QuoteArg(text) } err := aerc.cmd(cmd, nil, nil) if err != nil { aerc.PushError(err.Error()) } }, func(cmd string) ([]string, string) { return nil, "" // TODO: completions }) aerc.prompts.Push(p) } func (aerc *Aerc) RegisterChoices(choices []Choice) { cmds := make(map[string]string) texts := []string{} for _, c := range choices { text := fmt.Sprintf("[%s] %s", c.Key, c.Text) if strings.Contains(c.Text, c.Key) { text = strings.Replace(c.Text, c.Key, "["+c.Key+"]", 1) } texts = append(texts, text) cmds[c.Key] = c.Command } prompt := strings.Join(texts, ", ") + "? " p := NewPrompt(prompt, func(text string) { cmd, ok := cmds[text] if !ok { return } err := aerc.cmd(cmd, nil, nil) if err != nil { aerc.PushError(err.Error()) } }, func(cmd string) ([]string, string) { return nil, "" // TODO: completions }) aerc.prompts.Push(p) } func (aerc *Aerc) Mailto(addr *url.URL) error { var subject string var body string var acctName string var attachments []string h := &mail.Header{} to, err := mail.ParseAddressList(addr.Opaque) if err != nil && addr.Opaque != "" { return fmt.Errorf("Could not parse to: %w", err) } h.SetAddressList("to", to) template := config.Templates.NewMessage for key, vals := range addr.Query() { switch strings.ToLower(key) { case "account": acctName = strings.Join(vals, "") case "bcc": list, err := mail.ParseAddressList(strings.Join(vals, ",")) if err != nil { break } h.SetAddressList("Bcc", list) case "body": body = strings.Join(vals, "\n") case "cc": list, err := mail.ParseAddressList(strings.Join(vals, ",")) if err != nil { break } h.SetAddressList("Cc", list) case "in-reply-to": for i, msgID := range vals { if len(msgID) > 1 && msgID[0] == '<' && msgID[len(msgID)-1] == '>' { vals[i] = msgID[1 : len(msgID)-1] } } h.SetMsgIDList("In-Reply-To", vals) case "subject": subject = strings.Join(vals, ",") h.SetText("Subject", subject) case "template": template = strings.Join(vals, "") log.Tracef("template set to %s", template) case "attach": for _, path := range vals { // remove a potential file:// prefix. attachments = append(attachments, strings.TrimPrefix(path, "file://")) } default: // any other header gets ignored on purpose to avoid control headers // being injected } } acct := aerc.SelectedAccount() if acctName != "" { if a, ok := aerc.accounts[acctName]; ok && a != nil { acct = a } } if acct == nil { return errors.New("No account selected") } defer ui.Invalidate() composer, err := NewComposer(acct, acct.AccountConfig(), acct.Worker(), config.Compose.EditHeaders, template, h, nil, strings.NewReader(body)) if err != nil { return err } composer.FocusEditor("subject") title := "New email" if subject != "" { title = subject composer.FocusTerminal() } if to == nil { composer.FocusEditor("to") } composer.Tab = aerc.NewTab(composer, title) for _, file := range attachments { composer.AddAttachment(file) } return nil } func (aerc *Aerc) Mbox(source string) error { acctConf := config.AccountConfig{} if selectedAcct := aerc.SelectedAccount(); selectedAcct != nil { acctConf = *selectedAcct.acct info := fmt.Sprintf("Loading outgoing mbox mail settings from account [%s]", selectedAcct.Name()) aerc.PushStatus(info, 10*time.Second) log.Debugf(info) } else { acctConf.From = &mail.Address{Address: "user@localhost"} } acctConf.Name = "mbox" acctConf.Source = source acctConf.Default = "INBOX" acctConf.Archive = "Archive" acctConf.Postpone = "Drafts" acctConf.CopyTo = "Sent" defer ui.Invalidate() mboxView, err := NewAccountView(&acctConf, nil) if err != nil { aerc.NewTab(errorScreen(err.Error()), acctConf.Name) } else { aerc.accounts[acctConf.Name] = mboxView aerc.NewTab(mboxView, acctConf.Name) } return nil } func (aerc *Aerc) Command(cmd string) error { defer ui.Invalidate() return aerc.cmd(cmd, nil, nil) } func (aerc *Aerc) CloseBackends() error { var returnErr error for _, acct := range aerc.accounts { var raw interface{} = acct.worker.Backend c, ok := raw.(io.Closer) if !ok { continue } err := c.Close() if err != nil { returnErr = err log.Errorf("Closing backend failed for %s: %v", acct.Name(), err) } } return returnErr } func (aerc *Aerc) AddDialog(d ui.DrawableInteractive) { aerc.dialog = d aerc.Invalidate() } func (aerc *Aerc) CloseDialog() { aerc.dialog = nil aerc.Invalidate() } func (aerc *Aerc) GetPassword(title string, prompt string) (chText chan string, chErr chan error) { chText = make(chan string, 1) chErr = make(chan error, 1) getPasswd := NewGetPasswd(title, prompt, func(pw string, err error) { defer func() { close(chErr) close(chText) aerc.CloseDialog() }() if err != nil { chErr <- err return } chErr <- nil chText <- pw }) aerc.AddDialog(getPasswd) return } func (aerc *Aerc) DecryptKeys(keys []openpgp.Key, symmetric bool) (b []byte, err error) { for _, key := range keys { ident := key.Entity.PrimaryIdentity() chPass, chErr := aerc.GetPassword("Decrypt PGP private key", fmt.Sprintf("Enter password for %s (%8X)\nPress to cancel", ident.Name, key.PublicKey.KeyId)) for err := range chErr { if err != nil { return nil, err } pass := <-chPass err = key.PrivateKey.Decrypt([]byte(pass)) return nil, err } } return nil, err } // errorScreen is a widget that draws an error in the middle of the context func errorScreen(s string) ui.Drawable { errstyle := config.Ui.GetStyle(config.STYLE_ERROR) text := ui.NewText(s, errstyle).Strategy(ui.TEXT_CENTER) grid := ui.NewGrid().Rows([]ui.GridSpec{ {Strategy: ui.SIZE_WEIGHT, Size: ui.Const(1)}, {Strategy: ui.SIZE_EXACT, Size: ui.Const(1)}, {Strategy: ui.SIZE_WEIGHT, Size: ui.Const(1)}, }).Columns([]ui.GridSpec{ {Strategy: ui.SIZE_WEIGHT, Size: ui.Const(1)}, }) grid.AddChild(ui.NewFill(' ', tcell.StyleDefault)).At(0, 0) grid.AddChild(text).At(1, 0) grid.AddChild(ui.NewFill(' ', tcell.StyleDefault)).At(2, 0) return grid } func (aerc *Aerc) isExKey(event *tcell.EventKey, exKey config.KeyStroke) bool { if event.Key() == tcell.KeyRune { // Compare runes if it's a KeyRune return event.Modifiers() == exKey.Modifiers && event.Rune() == exKey.Rune } return event.Modifiers() == exKey.Modifiers && event.Key() == exKey.Key } // CmdFallbackSearch checks cmds for the first executable availabe in PATH. An error is // returned if none are found func CmdFallbackSearch(cmds []string, silent bool) (string, error) { var tried []string for _, cmd := range cmds { if cmd == "" { continue } params := strings.Split(cmd, " ") _, err := exec.LookPath(params[0]) if err != nil { tried = append(tried, cmd) if !silent { warn := fmt.Sprintf("cmd '%s' not found in PATH, using fallback", cmd) PushWarning(warn) } continue } return cmd, nil } return "", fmt.Errorf("no command found in PATH: %s", tried) }