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package responses
import (
"fmt"
"github.com/emersion/go-imap"
)
// A SELECT response.
type Select struct {
Mailbox *imap.MailboxStatus
}
func (r *Select) Handle(resp imap.Resp) error {
if r.Mailbox == nil {
r.Mailbox = &imap.MailboxStatus{Items: make(map[imap.StatusItem]interface{})}
}
mbox := r.Mailbox
switch resp := resp.(type) {
case *imap.DataResp:
name, fields, ok := imap.ParseNamedResp(resp)
if !ok || name != "FLAGS" {
return ErrUnhandled
} else if len(fields) < 1 {
return errNotEnoughFields
}
flags, _ := fields[0].([]interface{})
mbox.Flags, _ = imap.ParseStringList(flags)
case *imap.StatusResp:
if len(resp.Arguments) < 1 {
return ErrUnhandled
}
var item imap.StatusItem
switch resp.Code {
case "UNSEEN":
mbox.UnseenSeqNum, _ = imap.ParseNumber(resp.Arguments[0])
case "PERMANENTFLAGS":
flags, _ := resp.Arguments[0].([]interface{})
mbox.PermanentFlags, _ = imap.ParseStringList(flags)
case "UIDNEXT":
mbox.UidNext, _ = imap.ParseNumber(resp.Arguments[0])
item = imap.StatusUidNext
case "UIDVALIDITY":
mbox.UidValidity, _ = imap.ParseNumber(resp.Arguments[0])
item = imap.StatusUidValidity
default:
return ErrUnhandled
}
if item != "" {
mbox.ItemsLocker.Lock()
mbox.Items[item] = nil
mbox.ItemsLocker.Unlock()
}
default:
return ErrUnhandled
}
return nil
}
func (r *Select) WriteTo(w *imap.Writer) error {
mbox := r.Mailbox
if mbox.Flags != nil {
flags := make([]interface{}, len(mbox.Flags))
for i, f := range mbox.Flags {
flags[i] = imap.RawString(f)
}
res := imap.NewUntaggedResp([]interface{}{imap.RawString("FLAGS"), flags})
if err := res.WriteTo(w); err != nil {
return err
}
}
if mbox.PermanentFlags != nil {
flags := make([]interface{}, len(mbox.PermanentFlags))
for i, f := range mbox.PermanentFlags {
flags[i] = imap.RawString(f)
}
statusRes := &imap.StatusResp{
Type: imap.StatusRespOk,
Code: imap.CodePermanentFlags,
Arguments: []interface{}{flags},
Info: "Flags permitted.",
}
if err := statusRes.WriteTo(w); err != nil {
return err
}
}
if mbox.UnseenSeqNum > 0 {
statusRes := &imap.StatusResp{
Type: imap.StatusRespOk,
Code: imap.CodeUnseen,
Arguments: []interface{}{mbox.UnseenSeqNum},
Info: fmt.Sprintf("Message %d is first unseen", mbox.UnseenSeqNum),
}
if err := statusRes.WriteTo(w); err != nil {
return err
}
}
for k := range r.Mailbox.Items {
switch k {
case imap.StatusMessages:
res := imap.NewUntaggedResp([]interface{}{mbox.Messages, imap.RawString("EXISTS")})
if err := res.WriteTo(w); err != nil {
return err
}
case imap.StatusRecent:
res := imap.NewUntaggedResp([]interface{}{mbox.Recent, imap.RawString("RECENT")})
if err := res.WriteTo(w); err != nil {
return err
}
case imap.StatusUidNext:
statusRes := &imap.StatusResp{
Type: imap.StatusRespOk,
Code: imap.CodeUidNext,
Arguments: []interface{}{mbox.UidNext},
Info: "Predicted next UID",
}
if err := statusRes.WriteTo(w); err != nil {
return err
}
case imap.StatusUidValidity:
statusRes := &imap.StatusResp{
Type: imap.StatusRespOk,
Code: imap.CodeUidValidity,
Arguments: []interface{}{mbox.UidValidity},
Info: "UIDs valid",
}
if err := statusRes.WriteTo(w); err != nil {
return err
}
}
}
return nil
}
|
