438 lines
10 KiB
Go
438 lines
10 KiB
Go
package widgets
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import (
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"io"
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"io/ioutil"
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gomail "net/mail"
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"os"
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"os/exec"
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"time"
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"github.com/emersion/go-message"
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"github.com/emersion/go-message/mail"
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"github.com/gdamore/tcell"
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"github.com/mattn/go-runewidth"
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"github.com/pkg/errors"
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"git.sr.ht/~sircmpwn/aerc/config"
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"git.sr.ht/~sircmpwn/aerc/lib"
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"git.sr.ht/~sircmpwn/aerc/lib/ui"
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"git.sr.ht/~sircmpwn/aerc/worker/types"
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)
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type Composer struct {
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headers struct {
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from *headerEditor
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subject *headerEditor
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to *headerEditor
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}
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acct *config.AccountConfig
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config *config.AercConfig
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defaults map[string]string
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editor *Terminal
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email *os.File
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grid *ui.Grid
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review *reviewMessage
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worker *types.Worker
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focusable []ui.DrawableInteractive
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focused int
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}
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// TODO: Let caller configure headers, initial body (for replies), etc
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func NewComposer(conf *config.AercConfig,
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acct *config.AccountConfig, worker *types.Worker) *Composer {
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grid := ui.NewGrid().Rows([]ui.GridSpec{
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{ui.SIZE_EXACT, 3},
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{ui.SIZE_WEIGHT, 1},
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}).Columns([]ui.GridSpec{
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{ui.SIZE_WEIGHT, 1},
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})
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// TODO: let user specify extra headers to edit by default
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headers := ui.NewGrid().Rows([]ui.GridSpec{
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{ui.SIZE_EXACT, 1}, // To/From
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{ui.SIZE_EXACT, 1}, // Subject
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{ui.SIZE_EXACT, 1}, // [spacer]
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}).Columns([]ui.GridSpec{
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{ui.SIZE_WEIGHT, 1},
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{ui.SIZE_WEIGHT, 1},
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})
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to := newHeaderEditor("To", "")
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from := newHeaderEditor("From", acct.From)
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subject := newHeaderEditor("Subject", "")
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headers.AddChild(to).At(0, 0)
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headers.AddChild(from).At(0, 1)
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headers.AddChild(subject).At(1, 0).Span(1, 2)
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headers.AddChild(ui.NewFill(' ')).At(2, 0).Span(1, 2)
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email, err := ioutil.TempFile("", "aerc-compose-*.eml")
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if err != nil {
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// TODO: handle this better
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return nil
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}
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grid.AddChild(headers).At(0, 0)
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c := &Composer{
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acct: acct,
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config: conf,
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email: email,
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grid: grid,
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worker: worker,
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// You have to backtab to get to "From", since you usually don't edit it
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focused: 1,
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focusable: []ui.DrawableInteractive{from, to, subject},
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}
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c.headers.to = to
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c.headers.from = from
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c.headers.subject = subject
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c.ShowTerminal()
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return c
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}
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// Sets additional headers to be added to the outgoing email (e.g. In-Reply-To)
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func (c *Composer) Defaults(defaults map[string]string) *Composer {
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c.defaults = defaults
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if to, ok := defaults["To"]; ok {
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c.headers.to.input.Set(to)
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delete(defaults, "To")
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}
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if from, ok := defaults["From"]; ok {
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c.headers.from.input.Set(from)
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delete(defaults, "From")
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}
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if subject, ok := defaults["Subject"]; ok {
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c.headers.subject.input.Set(subject)
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delete(defaults, "Subject")
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}
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return c
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}
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// Note: this does not reload the editor. You must call this before the first
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// Draw() call.
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func (c *Composer) SetContents(reader io.Reader) *Composer {
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c.email.Seek(0, os.SEEK_SET)
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io.Copy(c.email, reader)
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c.email.Sync()
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c.email.Seek(0, os.SEEK_SET)
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return c
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}
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func (c *Composer) FocusTerminal() *Composer {
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if c.editor == nil {
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return c
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}
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c.focusable[c.focused].Focus(false)
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c.focused = 3
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c.focusable[c.focused].Focus(true)
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return c
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}
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func (c *Composer) OnSubjectChange(fn func(subject string)) {
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c.headers.subject.OnChange(func() {
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fn(c.headers.subject.input.String())
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})
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}
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func (c *Composer) Draw(ctx *ui.Context) {
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c.grid.Draw(ctx)
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}
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func (c *Composer) Invalidate() {
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c.grid.Invalidate()
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}
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func (c *Composer) OnInvalidate(fn func(d ui.Drawable)) {
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c.grid.OnInvalidate(func(_ ui.Drawable) {
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fn(c)
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})
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}
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func (c *Composer) Close() {
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if c.email != nil {
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path := c.email.Name()
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c.email.Close()
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os.Remove(path)
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c.email = nil
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}
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if c.editor != nil {
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c.editor.Destroy()
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c.editor = nil
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}
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}
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func (c *Composer) Bindings() string {
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if c.editor == nil {
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return "compose::review"
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} else if c.editor == c.focusable[c.focused] {
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return "compose::editor"
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} else {
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return "compose"
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}
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}
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func (c *Composer) Event(event tcell.Event) bool {
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return c.focusable[c.focused].Event(event)
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}
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func (c *Composer) Focus(focus bool) {
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c.focusable[c.focused].Focus(focus)
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}
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func (c *Composer) Config() *config.AccountConfig {
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return c.acct
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}
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func (c *Composer) Worker() *types.Worker {
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return c.worker
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}
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func (c *Composer) PrepareHeader() (*mail.Header, []string, error) {
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// Extract headers from the email, if present
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c.email.Seek(0, os.SEEK_SET)
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var (
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rcpts []string
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header mail.Header
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)
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reader, err := mail.CreateReader(c.email)
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if err == nil {
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header = reader.Header
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defer reader.Close()
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} else {
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c.email.Seek(0, os.SEEK_SET)
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}
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// Update headers
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mhdr := (*message.Header)(&header.Header)
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mhdr.SetContentType("text/plain", map[string]string{"charset": "UTF-8"})
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mhdr.SetText("Message-Id", lib.GenerateMessageId())
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if subject, _ := header.Subject(); subject == "" {
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header.SetSubject(c.headers.subject.input.String())
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}
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if date, err := header.Date(); err != nil || date == (time.Time{}) {
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header.SetDate(time.Now())
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}
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if from, _ := mhdr.Text("From"); from == "" {
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mhdr.SetText("From", c.headers.from.input.String())
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}
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if to := c.headers.to.input.String(); to != "" {
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// Dammit Simon, this branch is 3x as long as it ought to be because
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// your types aren't compatible enough with each other
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to_rcpts, err := gomail.ParseAddressList(to)
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if err != nil {
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return nil, nil, errors.Wrapf(err, "ParseAddressList(%s)", to)
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}
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ed_rcpts, err := header.AddressList("To")
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if err != nil {
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return nil, nil, errors.Wrap(err, "AddressList(To)")
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}
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for _, addr := range to_rcpts {
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ed_rcpts = append(ed_rcpts, (*mail.Address)(addr))
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}
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header.SetAddressList("To", ed_rcpts)
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for _, addr := range ed_rcpts {
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rcpts = append(rcpts, addr.Address)
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}
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}
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if cc, _ := mhdr.Text("Cc"); cc != "" {
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cc_rcpts, err := gomail.ParseAddressList(cc)
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if err != nil {
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return nil, nil, errors.Wrapf(err, "ParseAddressList(%s)", cc)
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}
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// TODO: Update when the user inputs Cc's through the UI
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for _, addr := range cc_rcpts {
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rcpts = append(rcpts, addr.Address)
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}
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}
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if bcc, _ := mhdr.Text("Bcc"); bcc != "" {
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bcc_rcpts, err := gomail.ParseAddressList(bcc)
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if err != nil {
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return nil, nil, errors.Wrapf(err, "ParseAddressList(%s)", bcc)
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}
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// TODO: Update when the user inputs Bcc's through the UI
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for _, addr := range bcc_rcpts {
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rcpts = append(rcpts, addr.Address)
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}
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}
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// Merge in additional headers
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txthdr := mhdr.Header
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for key, value := range c.defaults {
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if !txthdr.Has(key) && value != "" {
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mhdr.SetText(key, value)
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}
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}
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return &header, rcpts, nil
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}
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func (c *Composer) WriteMessage(header *mail.Header, writer io.Writer) error {
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c.email.Seek(0, os.SEEK_SET)
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var body io.Reader
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reader, err := mail.CreateReader(c.email)
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if err == nil {
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// TODO: Do we want to let users write a full blown multipart email
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// into the editor? If so this needs to change
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part, err := reader.NextPart()
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if err != nil {
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return errors.Wrap(err, "reader.NextPart")
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}
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body = part.Body
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defer reader.Close()
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} else {
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c.email.Seek(0, os.SEEK_SET)
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body = c.email
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}
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// TODO: attachments
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w, err := mail.CreateSingleInlineWriter(writer, *header)
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if err != nil {
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return errors.Wrap(err, "CreateSingleInlineWriter")
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}
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defer w.Close()
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if _, err := io.Copy(w, body); err != nil {
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return errors.Wrap(err, "io.Copy")
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}
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return nil
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}
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func (c *Composer) termClosed(err error) {
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c.grid.RemoveChild(c.editor)
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c.review = newReviewMessage(c, err)
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c.grid.AddChild(c.review).At(1, 0)
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c.editor.Destroy()
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c.editor = nil
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c.focusable = c.focusable[:len(c.focusable)-1]
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if c.focused >= len(c.focusable) {
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c.focused = len(c.focusable) - 1
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}
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}
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func (c *Composer) ShowTerminal() {
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if c.editor != nil {
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return
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}
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if c.review != nil {
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c.grid.RemoveChild(c.review)
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}
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editorName := c.config.Compose.Editor
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if editorName == "" {
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editorName = os.Getenv("EDITOR")
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}
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if editorName == "" {
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editorName = "vi"
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}
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editor := exec.Command(editorName, c.email.Name())
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c.editor, _ = NewTerminal(editor) // TODO: handle error
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c.editor.OnClose = c.termClosed
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c.grid.AddChild(c.editor).At(1, 0)
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c.focusable = append(c.focusable, c.editor)
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}
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func (c *Composer) PrevField() {
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c.focusable[c.focused].Focus(false)
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c.focused--
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if c.focused == -1 {
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c.focused = len(c.focusable) - 1
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}
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c.focusable[c.focused].Focus(true)
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}
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func (c *Composer) NextField() {
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c.focusable[c.focused].Focus(false)
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c.focused = (c.focused + 1) % len(c.focusable)
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c.focusable[c.focused].Focus(true)
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}
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type headerEditor struct {
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name string
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input *ui.TextInput
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}
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func newHeaderEditor(name string, value string) *headerEditor {
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return &headerEditor{
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input: ui.NewTextInput(value),
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name: name,
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}
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}
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func (he *headerEditor) Draw(ctx *ui.Context) {
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name := he.name + " "
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size := runewidth.StringWidth(name)
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ctx.Fill(0, 0, size, ctx.Height(), ' ', tcell.StyleDefault)
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ctx.Printf(0, 0, tcell.StyleDefault.Bold(true), "%s", name)
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he.input.Draw(ctx.Subcontext(size, 0, ctx.Width()-size, 1))
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}
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func (he *headerEditor) Invalidate() {
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he.input.Invalidate()
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}
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func (he *headerEditor) OnInvalidate(fn func(ui.Drawable)) {
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he.input.OnInvalidate(func(_ ui.Drawable) {
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fn(he)
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})
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}
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func (he *headerEditor) Focus(focused bool) {
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he.input.Focus(focused)
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}
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func (he *headerEditor) Event(event tcell.Event) bool {
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return he.input.Event(event)
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}
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func (he *headerEditor) OnChange(fn func()) {
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he.input.OnChange(func(_ *ui.TextInput) {
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fn()
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})
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}
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type reviewMessage struct {
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composer *Composer
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grid *ui.Grid
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}
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func newReviewMessage(composer *Composer, err error) *reviewMessage {
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grid := ui.NewGrid().Rows([]ui.GridSpec{
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{ui.SIZE_EXACT, 2},
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{ui.SIZE_EXACT, 1},
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{ui.SIZE_WEIGHT, 1},
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}).Columns([]ui.GridSpec{
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{ui.SIZE_WEIGHT, 1},
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})
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if err != nil {
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grid.AddChild(ui.NewText(err.Error()).
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Color(tcell.ColorRed, tcell.ColorDefault))
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grid.AddChild(ui.NewText("Press [q] to close this tab.")).At(1, 0)
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} else {
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// TODO: source this from actual keybindings?
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grid.AddChild(ui.NewText(
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"Send this email? [y]es/[n]o/[e]dit")).At(0, 0)
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grid.AddChild(ui.NewText("Attachments:").
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Reverse(true)).At(1, 0)
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// TODO: Attachments
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grid.AddChild(ui.NewText("(none)")).At(2, 0)
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}
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return &reviewMessage{
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composer: composer,
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grid: grid,
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}
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}
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func (rm *reviewMessage) Invalidate() {
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rm.grid.Invalidate()
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}
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func (rm *reviewMessage) OnInvalidate(fn func(ui.Drawable)) {
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rm.grid.OnInvalidate(func(_ ui.Drawable) {
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fn(rm)
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})
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}
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func (rm *reviewMessage) Draw(ctx *ui.Context) {
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rm.grid.Draw(ctx)
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}
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