diff options
Diffstat (limited to 'lib/threadbuilder.go')
| -rw-r--r-- | lib/threadbuilder.go | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/lib/threadbuilder.go b/lib/threadbuilder.go index 9137fc17..334a8468 100644 --- a/lib/threadbuilder.go +++ b/lib/threadbuilder.go @@ -192,18 +192,25 @@ func (t *threadable) MessageThreadReferences() []string { if t.IsDummy() || t.MsgInfo == nil { return nil } + irp, err := t.MsgInfo.InReplyTo() + if err != nil { + irp = "" + } refs, err := t.MsgInfo.References() if err != nil || len(refs) == 0 { - inreplyto, err := t.MsgInfo.InReplyTo() - if err != nil { + if irp == "" { return nil } - refs = []string{inreplyto} + refs = []string{irp} } - return cleanRefs(t.MessageThreadID(), refs) + return cleanRefs(t.MessageThreadID(), irp, refs) } -func cleanRefs(m string, refs []string) []string { +// cleanRefs cleans up the references headers for threading +// 1) message-id should not be part of the references +// 2) no message-id should occur twice (avoid circularities) +// 3) in-reply-to header should not be at the beginning +func cleanRefs(m, irp string, refs []string) []string { considered := make(map[string]interface{}) cleanRefs := make([]string, 0, len(refs)) for _, r := range refs { @@ -212,6 +219,11 @@ func cleanRefs(m string, refs []string) []string { cleanRefs = append(cleanRefs, r) } } + if irp != "" && len(cleanRefs) > 0 { + if cleanRefs[0] == irp { + cleanRefs = append(cleanRefs[1:], irp) + } + } return cleanRefs } |