foldynl · aa5sh · Mar 18, 2026 · Mar 18, 2026 · Mar 18, 2026 · Mar 19, 2026
diff --git a/.gitignore b/.gitignore
@@ -49,3 +49,4 @@ compile_commands.json
 # QtCreator local machine specific files for imported projects
 *creator.user*
 .DS_Store
+/build
diff --git a/logformat/AdiFormat.cpp b/logformat/AdiFormat.cpp
@@ -492,6 +492,14 @@ void AdiFormat::contactFields2SQLRecord(QMap<QString, QVariant> &contact, QSqlRe
         time_on = time_off;
     }
 
+    /* Records that have a date but no time (e.g. LoTW DXCC credit exports) would
+     * produce an invalid QDateTime, making them impossible to match later.
+     * Default to midnight UTC so the record remains usable. */
+    if ( !time_on.isValid() && date_on.isValid() )
+    {
+        time_on = QTime(0, 0, 0);
+    }
+
     QDateTime start_time(date_on, time_on, QTimeZone::utc());
     QDateTime end_time(date_off, time_off, QTimeZone::utc());
 

diff --git a/logformat/LogFormat.cpp b/logformat/LogFormat.cpp
@@ -773,6 +773,136 @@ unsigned long LogFormat::runImport(QTextStream& importLogStream,
 
 #undef RECORDIDX
 
+void LogFormat::runQSOCreditImport(QSLFrom /*fromService*/)
+{
+    FCT_IDENTIFICATION;
+
+    auto reportFormatter = [&](const QDateTime &qsoTime,
+                               const QString &callsign,
+                               const QString &mode,
+                               const QStringList addInfo = QStringList())
+    {
+        return QString("%0; %1; %2%3 %4").arg(qsoTime.isValid() ? qsoTime.toString(locale.formatDateShortWithYYYY()) : "-",
+                                              callsign,
+                                              mode,
+                                              (addInfo.size() > 0 ) ? ";" : "",
+                                              addInfo.join(", "));
+    };
+
+    QSLMergeStat stats = {QStringList(), QStringList(), QStringList(), QStringList(), 0};
+    this->importStart();
+
+    QSqlTableModel model;
+    model.setTable("contacts");
+    QSqlRecord QSLRecord = model.record(0);
+
+    while ( true )
+    {
+        QSLRecord.clearValues();
+
+        if ( !this->importNext(QSLRecord) ) break;
+
+        stats.qsosDownloaded++;
+
+        if ( stats.qsosDownloaded % 100 == 0 )
+        {
+            emit importPosition(stream.pos());
+        }
+
+        const QVariant &call = QSLRecord.value("callsign");
+        const QVariant &band = QSLRecord.value("band");
+        const QVariant &start_time = QSLRecord.value("start_time");
+        const QVariant &satName = QSLRecord.value("sat_name");
+
+        /* require at minimum: callsign, band, and a valid date */
+        if ( !start_time.toDateTime().isValid()
+             || call.toString().isEmpty()
+             || band.toString().isEmpty() )
+        {
+            qWarning() << "DXCC credit import: missing start_time, callsign, or band";
+            qCDebug(runtime) << QSLRecord;
+            stats.errorQSLs.append(reportFormatter(start_time.toDateTime(), call.toString(), ""));
+            continue;
+        }
+
+        /* Match on callsign + band + date + must already have a QSL confirmed.
+         * Mode is intentionally omitted because DXCC credit records may use generic
+         * mode group names that do not precisely match the logged mode.
+         * A ±1 day tolerance is applied because the credit file may record the QSO
+         * date in the operator's local time zone while the DB stores UTC, causing a
+         * one-day discrepancy for QSOs made near midnight. */
+        const QString matchFilter = QString(
+            "callsign=upper('%1') AND upper(band)=upper('%2') AND "
+            "COALESCE(sat_name, '') = upper('%3') AND "
+            "ABS(JULIANDAY(date(start_time)) - JULIANDAY(date('%4'))) <= 1 AND "
+            "(qsl_rcvd = 'Y' OR lotw_qsl_rcvd = 'Y')"
+        ).arg(call.toString(),
+              band.toString(),
+              satName.toString(),
+              start_time.toDateTime().toTimeZone(QTimeZone::utc()).toString("yyyy-MM-dd hh:mm:ss"));
+
+        model.setFilter(matchFilter);
+        model.select();
+
+        if ( model.rowCount() < 1 )
+        {
+            stats.unmatchedQSLs.append(reportFormatter(start_time.toDateTime(), call.toString(), ""));
+            continue;
+        }
+
+        qCDebug(runtime) << "DXCC credit: found" << model.rowCount() << "match(es) for"
+                         << call.toString() << band.toString() << start_time.toString();
+
+        /* Update every matching contact — multiple QSOs on the same date/band are possible. */
+        for ( int row = 0; row < model.rowCount(); ++row )
+        {
+            QSqlRecord originalRecord = model.record(row);
+
+            QStringList updatedFields;
+            bool callUpdate = false;
+
+            auto conditionUpdate = [&](const QString &contactKey,
+                                       const QString &qslKey)
+            {
+                if ( !QSLRecord.value(qslKey).toString().isEmpty()
+                     && originalRecord.value(contactKey).toString().isEmpty() )
+                {
+                    qCDebug(runtime) << "Updating:" << contactKey
+                                     << "to" << QSLRecord.value(qslKey).toString();
+                    updatedFields.append(contactKey + "(" + QSLRecord.value(qslKey).toString() + ")");
+                    originalRecord.setValue(contactKey, QSLRecord.value(qslKey));
+                    return true;
+                }
+                return false;
+            };
+
+            callUpdate |= conditionUpdate("credit_granted",            "credit_granted");
+            callUpdate |= conditionUpdate("credit_submitted",          "credit_submitted");
+
+            if ( callUpdate )
+            {
+                if ( !model.setRecord(row, originalRecord) )
+                {
+                    qWarning() << "Cannot update a Contact record - " << model.lastError();
+                    qCDebug(runtime) << originalRecord;
+                }
+                stats.updatedQSOs.append(reportFormatter(start_time.toDateTime(), call.toString(), "", updatedFields));
+            }
+        }
+
+        if ( !model.submitAll() )
+        {
+            qWarning() << "Cannot commit changes to Contact Table - " << model.lastError();
+        }
+    }
+
+    emit importPosition(stream.pos());
+
+    this->importEnd();
+
+    emit QSLMergeFinished(stats);
+}
+
 void LogFormat::runQSLImport(QSLFrom fromService)
 {
     FCT_IDENTIFICATION;

diff --git a/logformat/LogFormat.h b/logformat/LogFormat.h
@@ -34,6 +34,7 @@ class LogFormat : public QObject {
     enum QSLFrom {
         LOTW,
         EQSL,
+        LOTW_DXCC,
         UNKNOW
     };
 
@@ -57,6 +58,7 @@ class LogFormat : public QObject {
                             unsigned long *warnings,
                             unsigned long *errors);
     void runQSLImport(QSLFrom fromService);
+    void runQSOCreditImport(QSLFrom fromService);
     long runExport();
     long runExport(const QList<QSqlRecord>&);
     void setDefaults(QMap<QString, QString>& defaults);

diff --git a/service/lotw/Lotw.cpp b/service/lotw/Lotw.cpp
@@ -434,21 +434,29 @@ void LotwQSLDownloader::receiveQSL(const QDate &start_date, bool qso_since, cons
     qCDebug(function_parameters) << start_date << " " << qso_since;
 
     QList<QPair<QString, QString>> params;
-    params.append(qMakePair(QString("qso_query"), QString("1")));
-    params.append(qMakePair(QString("qso_qsldetail"), QString("yes")));
-    params.append(qMakePair(QString("qso_owncall"), station_callsign));
 
-    const QString &start = start_date.toString("yyyy-MM-dd");
-
-    if (qso_since)
+    if ( LotwDXCCCredits )
     {
-        params.append(qMakePair(QString("qso_qsl"), QString("no")));
-        params.append(qMakePair(QString("qso_qsorxsince"), start));
+        params.append(qMakePair(QString("ac_acct"), QString("1")));
     }
     else
     {
-        params.append(qMakePair(QString("qso_qsl"), QString("yes")));
-        params.append(qMakePair(QString("qso_qslsince"), start));
+        params.append(qMakePair(QString("qso_query"), QString("1")));
+        params.append(qMakePair(QString("qso_qsldetail"), QString("yes")));
+        params.append(qMakePair(QString("qso_owncall"), station_callsign));
+
+        const QString &start = start_date.toString("yyyy-MM-dd");
+
+        if (qso_since)
+        {
+            params.append(qMakePair(QString("qso_qsl"), QString("no")));
+            params.append(qMakePair(QString("qso_qsorxsince"), start));
+        }
+        else
+        {
+            params.append(qMakePair(QString("qso_qsl"), QString("yes")));
+            params.append(qMakePair(QString("qso_qslsince"), start));
+        }
     }
 
     get(params);
@@ -540,7 +548,10 @@ void LotwQSLDownloader::processReply(QNetworkReply *reply)
         emit receiveQSLComplete(stats);
     });
 
-    adi.runQSLImport(adi.LOTW);
+    if ( LotwDXCCCredits )
+        adi.runQSOCreditImport(adi.LOTW_DXCC);
+    else
+        adi.runQSLImport(adi.LOTW);
 
     tempFile.close();
 
@@ -559,7 +570,7 @@ void LotwQSLDownloader::get(QList<QPair<QString, QString>> params)
     query.addQueryItem("login", username.toUtf8().toPercentEncoding());
     query.addQueryItem("password", password.toUtf8().toPercentEncoding());
 
-    QUrl url(ADIF_API);
+    QUrl url(LotwDXCCCredits ? DXCC_CREDIT_API : ADIF_API);
     url.setQuery(query);
 
     qCDebug(runtime) << Data::safeQueryString(query);

diff --git a/service/lotw/Lotw.h b/service/lotw/Lotw.h
@@ -95,6 +95,8 @@ class LotwQSLDownloader : public GenericQSLDownloader, private LotwBase
     explicit LotwQSLDownloader(QObject *parent = nullptr);
     virtual ~LotwQSLDownloader();
 
+    bool LotwDXCCCredits = false;
+
     virtual void receiveQSL(const QDate &, bool, const QString &) override;
 
 public slots:
@@ -103,6 +105,7 @@ public slots:
 private:
     QNetworkReply *currentReply;
     const QString ADIF_API = "https://lotw.arrl.org/lotwuser/lotwreport.adi";
+    const QString DXCC_CREDIT_API = "https://lotw.arrl.org/lotwuser/logbook/qslcards.php";
 
     virtual void processReply(QNetworkReply* reply) override;
     void get(QList<QPair<QString, QString>> params);

diff --git a/ui/DownloadQSLDialog.cpp b/ui/DownloadQSLDialog.cpp
@@ -25,6 +25,7 @@ DownloadQSLDialog::DownloadQSLDialog(QWidget *parent)
                                                        "FROM contacts ORDER BY station_callsign", "", ui->lotwMyCallsignCombo));
     ui->lotwDateEdit->setDisplayFormat(locale.formatDateShortWithYYYY());
     ui->eqslDateEdit->setDisplayFormat(locale.formatDateShortWithYYYY());
+
     ui->buttonBox->button(QDialogButtonBox::Ok)->setText(tr("&Download"));
 
     const StationProfile &profile = StationProfilesManager::instance()->getCurProfile1();
@@ -44,6 +45,9 @@ DownloadQSLDialog::DownloadQSLDialog(QWidget *parent)
         ui->lotwGroupBox->setChecked(false);
         ui->lotwGroupBox->setEnabled(false);
         ui->lotwGroupBox->setToolTip(tr("LoTW is not configured properly.<p> Please, use <b>Settings</b> dialog to configure it.</p>"));
+        ui->lotwDXCCCheckBox->setChecked(false);
+        ui->lotwDXCCCheckBox->setEnabled(false);
+        ui->lotwDXCCCheckBox->setToolTip(tr("LoTW is not configured properly.<p> Please, use <b>Settings</b> dialog to configure it.</p>"));
     }
 
     if ( EQSLBase::getUsername().isEmpty() )
@@ -97,6 +101,9 @@ void DownloadQSLDialog::loadDialogState()
     ui->eqslDateTypeCombo->setCurrentIndex((LogParam::getDownloadQSLServiceLastQSOQSL("eqsl")) ? 0 : 1);
 
     ui->eqslQTHProfileEdit->setText(LogParam::getDownloadQSLeQSLLastProfile());
+
+    /* LoTW DXCC Credits checkbox always starts unchecked — this is a one-off task. */
+    ui->lotwDXCCCheckBox->setChecked(false);
 }
 
 void DownloadQSLDialog::saveDialogState()
@@ -205,6 +212,15 @@ void DownloadQSLDialog::downloadQSLs()
             lotw->receiveQSL(ui->lotwDateEdit->date(), !qslSinceActive, ui->lotwMyCallsignCombo->currentText());
         });
 
+    if ( ui->lotwDXCCCheckBox->isChecked() )
+        downloadQueue.enqueue([=]()
+        {
+            LotwQSLDownloader* lotw = new LotwQSLDownloader(this);
+            lotw->LotwDXCCCredits = true;
+            prepareDownload(lotw, tr("LoTW DXCC Credits"), false, "lotwdxcc");
+            lotw->receiveQSL(QDate(), false, QString());
+        });
+
     if ( downloadQueue.isEmpty() )
     {
         QMessageBox::information(this, tr("QLog Information"), tr("No service selected"));

diff --git a/ui/DownloadQSLDialog.ui b/ui/DownloadQSLDialog.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>403</width>
-    <height>270</height>
+    <height>290</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -109,7 +109,14 @@
      </layout>
     </widget>
    </item>
-   <item row="2" column="1">
+   <item row="2" column="0" colspan="2">
+    <widget class="QCheckBox" name="lotwDXCCCheckBox">
+     <property name="text">
+      <string>LoTW DXCC Credits</string>
+     </property>
+    </widget>
+   </item>
+   <item row="3" column="1">
     <widget class="QDialogButtonBox" name="buttonBox">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>
@@ -130,6 +137,7 @@
   <tabstop>lotwDateTypeCombo</tabstop>
   <tabstop>lotwDateEdit</tabstop>
   <tabstop>lotwMyCallsignCombo</tabstop>
+  <tabstop>lotwDXCCCheckBox</tabstop>
  </tabstops>
  <resources/>
  <connections>