fb5558da81
This patch updates the seqNums after an Expunge operation. When an expunge operation occurs, the seqNum of the deleted message is reported. The Imap spec [0] states that an immediate decrement of all seqnums greater than the deleted occurs, even before the next reporting of an expunge update. [0]: https://datatracker.ietf.org/doc/html/rfc3501#section-7.4.1 Fixes: https://todo.sr.ht/~rjarry/aerc/61 Signed-off-by: Tim Culverhouse <tim@timculverhouse.com> Signed-off-by: Robin Jarry <robin@jarry.cc>
61 lines
1 KiB
Go
61 lines
1 KiB
Go
package imap
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import (
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"sync"
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)
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type SeqMap struct {
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lock sync.Mutex
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// map of IMAP sequence numbers to message UIDs
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m map[uint32]uint32
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}
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func (s *SeqMap) Size() int {
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s.lock.Lock()
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size := len(s.m)
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s.lock.Unlock()
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return size
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}
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func (s *SeqMap) Get(seqnum uint32) (uint32, bool) {
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s.lock.Lock()
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uid, found := s.m[seqnum]
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s.lock.Unlock()
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return uid, found
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}
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func (s *SeqMap) Put(seqnum, uid uint32) {
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s.lock.Lock()
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if s.m == nil {
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s.m = make(map[uint32]uint32)
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}
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s.m[seqnum] = uid
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s.lock.Unlock()
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}
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func (s *SeqMap) Pop(seqnum uint32) (uint32, bool) {
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s.lock.Lock()
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uid, found := s.m[seqnum]
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if found {
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m := make(map[uint32]uint32)
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for s, u := range s.m {
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if s > seqnum {
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// All sequence numbers greater than the removed one must be decremented by one
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// https://datatracker.ietf.org/doc/html/rfc3501#section-7.4.1
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m[s-1] = u
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} else if s < seqnum {
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m[s] = u
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}
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}
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s.m = m
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}
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s.lock.Unlock()
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return uid, found
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}
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func (s *SeqMap) Clear() {
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s.lock.Lock()
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s.m = make(map[uint32]uint32)
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s.lock.Unlock()
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}
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