fix: align IM client interaction edge cases

server/push/jpush/push_jpush.go

@@ -347,10 +347,10 @@ func preparePayloads(rcpt *push.Receipt, config *configType) ([]*jpushPayload, [
 	var targets []t.Uid
 	for _, uid := range uids {
 		recipient := rcpt.To[uid]
-		if recipient.Delivered > 0 {
-			continue
-		}
 		userData := cloneData(data)
+		if recipient.Delivered > 0 {
+			userData["silent"] = "true"
+		}
 		topic := rcpt.Payload.Topic
 		var audience map[string][]string
 		if useAlias {

server/push/jpush/push_jpush_test.go

@@ -146,6 +146,30 @@ func TestPreparePayloadsCanUseRegistrationID(t *testing.T) {
 	}
 }
 
+func TestPreparePayloadsDoesNotDropRecipientWithDeliveredSession(t *testing.T) {
+	oldTokens := store.DevicePushTokens
+	uid := types.Uid(42)
+	store.DevicePushTokens = &testDevicePushTokenStore{devices: map[types.Uid][]types.DeviceDef{
+		uid: {{DeviceId: "push-token", Platform: "ios"}},
+	}}
+	defer func() { store.DevicePushTokens = oldTokens }()
+	useAlias := false
+	config := &configType{Title: "MeetingIM", DefaultTTLSeconds: 86400, CallTTLSeconds: 60, UseAlias: &useAlias}
+	payloads, _ := preparePayloads(&push.Receipt{
+		TenantID: 7,
+		To: map[types.Uid]push.Recipient{
+			uid: {Delivered: 1},
+		},
+		Payload: push.Payload{What: push.ActMsg, Topic: "grpTopic", SeqId: 9, Timestamp: time.Now()},
+	}, config)
+	if len(payloads) != 1 {
+		t.Fatalf("unexpected payload count: %d", len(payloads))
+	}
+	if payloads[0].Message == nil || payloads[0].Message.Extras["silent"] != "true" {
+		t.Fatalf("expected silent payload for delivered recipient: %#v", payloads[0])
+	}
+}
+
 func TestBuildPayloadUsesShortTTLForCalls(t *testing.T) {
 	config := &configType{Title: "MeetingIM", DefaultTTLSeconds: 86400, CallTTLSeconds: 60}
 	payload := buildPayload(map[string][]string{"alias": {"usr1"}}, "p2pTopic", map[string]string{