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path: root/commands/account/reply.go
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package account

import (
	"bufio"
	"errors"
	"fmt"
	"io"
	"strings"

	"git.sr.ht/~sircmpwn/getopt"
	"github.com/emersion/go-imap"

	"git.sr.ht/~sircmpwn/aerc2/widgets"
)

func init() {
	register("reply", Reply)
}

func Reply(aerc *widgets.Aerc, args []string) error {
	opts, optind, err := getopt.Getopts(args[1:], "aq")
	if err != nil {
		return err
	}
	if optind != len(args) - 1 {
		return errors.New("Usage: reply [-aq]")
	}
	var (
		quote    bool
		replyAll bool
	)
	for _, opt := range opts {
		switch opt.Option {
		case 'a':
			replyAll = true
		case 'q':
			quote = true
		}
	}

	acct := aerc.SelectedAccount()
	store := acct.Messages().Store()
	msg := acct.Messages().Selected()
	acct.Logger().Println("Replying to email " + msg.Envelope.MessageId)

	var (
		to     []string
		cc     []string
		toList []*imap.Address
	)
	if len(msg.Envelope.ReplyTo) != 0 {
		toList = msg.Envelope.ReplyTo
	} else {
		toList = msg.Envelope.From
	}
	for _, addr := range toList {
		if addr.PersonalName != "" {
			to = append(to, fmt.Sprintf("%s <%s@%s>",
				addr.PersonalName, addr.MailboxName, addr.HostName))
		} else {
			to = append(to, fmt.Sprintf("<%s@%s>",
				addr.MailboxName, addr.HostName))
		}
	}
	if replyAll {
		for _, addr := range msg.Envelope.Cc {
			if addr.PersonalName != "" {
				cc = append(cc, fmt.Sprintf("%s <%s@%s>",
					addr.PersonalName, addr.MailboxName, addr.HostName))
			} else {
				cc = append(cc, fmt.Sprintf("<%s@%s>",
					addr.MailboxName, addr.HostName))
			}
		}
	}

	var subject string
	if !strings.HasPrefix(msg.Envelope.Subject, "Re: ") {
		subject = "Re: " + msg.Envelope.Subject
	} else {
		subject = msg.Envelope.Subject
	}

	composer := widgets.NewComposer(
		aerc.Config(), acct.AccountConfig(), acct.Worker()).
		Defaults(map[string]string{
			"To": strings.Join(to, ","),
			"Cc": strings.Join(cc, ","),
			"Subject": subject,
			"In-Reply-To": msg.Envelope.MessageId,
		}).
		FocusTerminal()

	addTab := func() {
		tab := aerc.NewTab(composer, subject)
		composer.OnSubjectChange(func(subject string) {
			if subject == "" {
				tab.Name = "New email"
			} else {
				tab.Name = subject
			}
			tab.Content.Invalidate()
		})
	}

	if quote {
		// TODO: something more intelligent than fetching the 0th part
		store.FetchBodyPart(msg.Uid, 0, func(reader io.Reader) {
			pipeout, pipein := io.Pipe()
			scanner := bufio.NewScanner(reader)
			go composer.SetContents(pipeout)
			// TODO: Let user customize the date format used here
			io.WriteString(pipein, fmt.Sprintf("On %s %s wrote:\n",
				msg.Envelope.Date.Format("Mon Jan 2, 2006 at 3:04 PM"),
				msg.Envelope.From[0].PersonalName))
			for scanner.Scan() {
				io.WriteString(pipein, fmt.Sprintf("> %s\n",scanner.Text()))
			}
			pipein.Close()
			pipeout.Close()
			addTab()
		})
	} else {
		addTab()
	}

	return nil
}