312 lines
7.0 KiB
Go
312 lines
7.0 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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"git.sr.ht/~sircmpwn/aerc2/config"
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"git.sr.ht/~sircmpwn/aerc2/lib/ui"
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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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config *config.AccountConfig
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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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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.AccountConfig) *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", conf.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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// TODO: built-in config option, $EDITOR, then vi, in that order
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editor := exec.Command("vim", email.Name())
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term, _ := NewTerminal(editor)
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grid.AddChild(headers).At(0, 0)
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grid.AddChild(term).At(1, 0)
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c := &Composer{
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config: conf,
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editor: term,
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email: email,
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grid: grid,
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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, term},
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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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term.OnClose = c.termClosed
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return c
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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) 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.config
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}
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func (c *Composer) Header() (*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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// TODO: Custom header fields
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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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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, err
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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, err
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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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// TODO: Add cc, bcc to rcpts
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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 err
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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 err
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}
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defer w.Close()
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_, err = io.Copy(w, body)
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return err
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}
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func (c *Composer) termClosed(err error) {
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// TODO: do we care about that error (note: yes, we do)
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c.grid.RemoveChild(c.editor)
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c.grid.AddChild(newReviewMessage(c)).At(1, 0)
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c.editor.Destroy()
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c.editor = nil
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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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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) *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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grid.AddChild(ui.NewText(
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"Send this email? [y]es/[n]o/[e]dit/[a]ttach file")).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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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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