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imapserver: implement NOTIFY extension from RFC 5465

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NOTIFY is like IDLE, but where IDLE watches just the selected mailbox, NOTIFY
can watch all mailboxes. With NOTIFY, a client can also ask a server to
immediately return configurable fetch attributes for new messages, e.g. a
message preview, certain header fields, or simply the entire message.

Mild testing with evolution and fairemail.
This commit is contained in:
Mechiel Lukkien
2025-04-07 23:21:03 +02:00
parent 5a7d5fce98
commit 8bab38eac4
30 changed files with 1926 additions and 161 deletions
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52
imapserver/search.go
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@ -49,33 +49,13 @@ func (c *conn) cmdxSearch(isUID, isE bool, tag, cmd string, p *parser) {
// The ESEARCH command has various ways to specify which mailboxes are to be
// searched. We parse and gather the request first, and evaluate them to mailboxes
// after parsing, when we start and have a DB transaction.
type mailboxSpec struct {
Kind string
Args []string
}
var mailboxSpecs []mailboxSpec
var mailboxSpecs []mailboxSpecifier
// ../rfc/7377:468
if isE && p.take(" IN (") {
for {
mbs := mailboxSpec{}
mbs.Kind = p.xtakelist("SELECTED", "INBOXES", "PERSONAL", "SUBSCRIBED", "SUBTREE-ONE", "SUBTREE", "MAILBOXES")
switch mbs.Kind {
case "SUBTREE", "SUBTREE-ONE", "MAILBOXES":
p.xtake(" ")
if p.take("(") {
for {
mbs.Args = append(mbs.Args, p.xmailbox())
if !p.take(" ") {
break
}
}
p.xtake(")")
} else {
mbs.Args = []string{p.xmailbox()}
}
}
mailboxSpecs = append(mailboxSpecs, mbs)
ms := p.xfilterMailbox(mbspecsEsearch)
mailboxSpecs = append(mailboxSpecs, ms)
if !p.take(" ") {
break
@ -214,9 +194,9 @@ func (c *conn) cmdxSearch(isUID, isE bool, tag, cmd string, p *parser) {
if len(mailboxSpecs) > 0 {
// While gathering, we deduplicate mailboxes. ../rfc/7377:312
m := map[int64]store.Mailbox{}
for _, mbs := range mailboxSpecs {
switch mbs.Kind {
case "SELECTED":
for _, ms := range mailboxSpecs {
switch ms.Kind {
case mbspecSelected:
// ../rfc/7377:306
if c.state != stateSelected {
xsyntaxErrorf("cannot use ESEARCH with selected when state is not selected")
@ -225,7 +205,7 @@ func (c *conn) cmdxSearch(isUID, isE bool, tag, cmd string, p *parser) {
mb := c.xmailboxID(tx, c.mailboxID) // Validate.
m[mb.ID] = mb
case "INBOXES":
case mbspecInboxes:
// Inbox and everything below. And we look at destinations and rulesets. We all
// mailboxes from the destinations, and all from the rulesets except when
// ListAllowDomain is non-empty.
@ -265,7 +245,7 @@ func (c *conn) cmdxSearch(isUID, isE bool, tag, cmd string, p *parser) {
}
}
case "PERSONAL":
case mbspecPersonal:
// All mailboxes in the personal namespace. Which is all mailboxes for us.
// ../rfc/5465:817
for mb, err := range bstore.QueryTx[store.Mailbox](tx).FilterEqual("Expunged", false).All() {
@ -273,7 +253,7 @@ func (c *conn) cmdxSearch(isUID, isE bool, tag, cmd string, p *parser) {
m[mb.ID] = mb
}
case "SUBSCRIBED":
case mbspecSubscribed:
// Mailboxes that are subscribed. Will typically be same as personal, since we
// subscribe to all mailboxes. But user can manage subscriptions differently.
// ../rfc/5465:831
@ -286,7 +266,7 @@ func (c *conn) cmdxSearch(isUID, isE bool, tag, cmd string, p *parser) {
}
}
case "SUBTREE", "SUBTREE-ONE":
case mbspecSubtree, mbspecSubtreeOne:
// The mailbox name itself, and children. ../rfc/5465:847
// SUBTREE is arbitrarily deep, SUBTREE-ONE is one level deeper than requested
// mailbox. The mailbox itself is included too ../rfc/7377:274
@ -294,13 +274,13 @@ func (c *conn) cmdxSearch(isUID, isE bool, tag, cmd string, p *parser) {
// We don't have to worry about loops. Mailboxes are not in the file system.
// ../rfc/7377:291
for _, name := range mbs.Args {
for _, name := range ms.Mailboxes {
name = xcheckmailboxname(name, true)
one := mbs.Kind == "SUBTREE-ONE"
one := ms.Kind == mbspecSubtreeOne
var ntoken int
if one {
ntoken = len(strings.Split(name, "/"))
ntoken = len(strings.Split(name, "/")) + 1
}
q := bstore.QueryTx[store.Mailbox](tx)
@ -312,15 +292,15 @@ func (c *conn) cmdxSearch(isUID, isE bool, tag, cmd string, p *parser) {
if mb.Name != name && !strings.HasPrefix(mb.Name, name+"/") {
break
}
if !one || mb.Name == name || len(strings.Split(mb.Name, "/")) == ntoken+1 {
if !one || mb.Name == name || len(strings.Split(mb.Name, "/")) == ntoken {
m[mb.ID] = mb
}
}
}
case "MAILBOXES":
case mbspecMailboxes:
// Just the specified mailboxes. ../rfc/5465:853
for _, name := range mbs.Args {
for _, name := range ms.Mailboxes {
name = xcheckmailboxname(name, true)
// If a mailbox doesn't exist, we don't treat it as an error. Seems reasonable