jmap: fetch entire threads

JMAP was missing good thread support, especially when compared to Gmail.
This will fetch entire threads when possible.

Signed-off-by: Tristan Partin <tristan@partin.io>

1 files changed, 26 insertions, 0 deletions

diff --git a/worker/jmap/state.go b/worker/jmap/state.go
index 3dbab3fb..833bd151 100644
--- a/worker/jmap/state.go
+++ b/worker/jmap/state.go
@@ -3,6 +3,7 @@ package jmap
 import (
 	"git.sr.ht/~rockorager/go-jmap"
 	"git.sr.ht/~rockorager/go-jmap/mail/mailbox"
+	"git.sr.ht/~rockorager/go-jmap/mail/thread"
 )
 
 func (w *JMAPWorker) getMailboxState() (string, error) {
@@ -27,3 +28,28 @@ func (w *JMAPWorker) getMailboxState() (string, error) {
 	// This should be an impossibility
 	return "", nil
 }
+
+func (w *JMAPWorker) getThreadState() (string, error) {
+	var req jmap.Request
+
+	// TODO: This is a junk JMAP ID because Go's JSON serialization doesn't
+	// send empty slices as arrays, WTF.
+	req.Invoke(&thread.Get{Account: w.accountId, IDs: []jmap.ID{jmap.ID("00")}})
+	resp, err := w.Do(&req)
+	if err != nil {
+		return "", err
+	}
+
+	for _, inv := range resp.Responses {
+		switch r := inv.Args.(type) {
+		case *thread.GetResponse:
+			return r.State, nil
+		case *jmap.MethodError:
+			return "", wrapMethodError(r)
+
+		}
+	}
+
+	// This should be an impossibility
+	return "", nil
+}