feat(settings): Export and copy debug log

Fixes #2890

src/widget/form/settings/advancedform.cpp

@@ -24,6 +24,8 @@
 #include <QDir>
 #include <QMessageBox>
 #include <QProcess>
+#include <QClipboard>
+#include <QFileDialog>
 
 #include "src/core/core.h"
 #include "src/core/coreav.h"
@@ -91,6 +93,73 @@ void AdvancedForm::on_cbMakeToxPortable_stateChanged()
 {
     Settings::getInstance().setMakeToxPortable(bodyUI->cbMakeToxPortable->isChecked());
 }
+void AdvancedForm::on_btnExportLog_clicked()
+{
+    QString savefile = QFileDialog::getSaveFileName(this, tr("Save File"), QDir::homePath(), tr("Logs (*.log)"), 0, QFileDialog::DontUseNativeDialog);
+
+    if (savefile.isNull() || savefile.isEmpty())
+    {
+        qDebug() << "Debug log save file was not properly chosen";
+        return;
+    }
+
+    QString logFileDir = Settings::getInstance().getAppCacheDirPath();
+    QString logfile = logFileDir + "qtox.log";
+
+    QFile file(logfile);
+    if (file.exists())
+    {
+        qDebug() << "Found debug log for copying";
+    }
+    else
+    {
+        qDebug() << "No debug file found";
+        return;
+    }
+
+    if (QFile::copy(logfile, savefile))
+        qDebug() << "Successfully copied to: " << savefile;
+    else
+        qDebug() << "File was not copied";
+}
+
+void AdvancedForm::on_btnCopyDebug_clicked()
+{
+    QString logFileDir = Settings::getInstance().getAppCacheDirPath();
+    QString logfile = logFileDir + "qtox.log";
+
+    QFile file(logfile);
+    if (!file.exists())
+    {
+        qDebug() << "No debug file found";
+        return;
+    }
+
+    QClipboard* clipboard = QApplication::clipboard();
+    if (clipboard)
+    {
+        QString debugtext;
+        if (file.open(QIODevice::ReadOnly | QIODevice::Text))
+        {
+            QTextStream in(&file);
+            debugtext = in.readAll();
+            file.close();
+        }
+        else
+        {
+            qDebug() << "Unable to open file for copying to clipboard";
+            return;
+        }
+
+        clipboard->setText(debugtext, QClipboard::Clipboard);
+        qDebug() << "Debug log copied to clipboard";
+    }
+    else
+    {
+        qDebug() << "Unable to access clipboard";
+    }
+
+}
 
 void AdvancedForm::on_resetButton_clicked()
 {

src/widget/form/settings/advancedform.h

@@ -43,6 +43,9 @@ private slots:
     // Portable
     void on_cbMakeToxPortable_stateChanged();
     void on_resetButton_clicked();
+    // Debug
+    void on_btnCopyDebug_clicked();
+    void on_btnExportLog_clicked();
     // Connection
     void on_cbEnableIPv6_stateChanged();
     void on_cbEnableUDP_stateChanged();

src/widget/form/settings/advancedsettings.ui

@@ -24,8 +24,8 @@
        <rect>
         <x>0</x>
         <y>0</y>
-        <width>489</width>
+        <width>485</width>
-        <height>549</height>
+        <height>545</height>
        </rect>
       </property>
       <layout class="QVBoxLayout" name="verticalLayout_2">
@@ -64,6 +64,29 @@
          </layout>
         </widget>
        </item>
+       <item>
+        <widget class="QGroupBox" name="DebugGroup">
+         <property name="title">
+          <string>Debug</string>
+         </property>
+         <layout class="QHBoxLayout" name="horizontalLayout">
+          <item>
+           <widget class="QPushButton" name="btnExportLog">
+            <property name="text">
+             <string>Export Debug Log</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QPushButton" name="btnCopyDebug">
+            <property name="text">
+             <string>Copy Debug Log</string>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </widget>
+       </item>
        <item>
         <widget class="QGroupBox" name="connectionGroup">
          <property name="title">