feat: add restrictions to key database

src/core/GpgCoreInit.cpp

@@ -99,9 +99,12 @@ auto InitGpgME(const QString& gpgconf_path, const QString& gnupg_path) -> bool {
   gpgme_set_locale(nullptr, LC_MESSAGES, setlocale(LC_MESSAGES, nullptr));
 #endif
 
-  if (!gnupg_path.isEmpty()) {
+  if (!gpgconf_path.isEmpty()) {
     CheckGpgError(gpgme_set_engine_info(GPGME_PROTOCOL_GPGCONF,
                                         gpgconf_path.toUtf8(), nullptr));
+  }
+
+  if (!gnupg_path.isEmpty()) {
     CheckGpgError(gpgme_set_engine_info(GPGME_PROTOCOL_OpenPGP,
                                         gnupg_path.toUtf8(), nullptr));
   }

src/ui/dialog/KeyDatabaseEditDialog.cpp

@@ -28,15 +28,19 @@
 
 #include "KeyDatabaseEditDialog.h"
 
+#include "core/utils/GpgUtils.h"
 #include "core/utils/MemoryUtils.h"
 #include "ui_KeyDatabaseEditDialog.h"
 
 namespace GpgFrontend::UI {
 KeyDatabaseEditDialog::KeyDatabaseEditDialog(QWidget* parent)
     : GeneralDialog("KeyDatabaseEditDialog", parent),
-      ui_(GpgFrontend::SecureCreateSharedObject<Ui_KeyDatabaseEditDialog>()) {
+      ui_(GpgFrontend::SecureCreateSharedObject<Ui_KeyDatabaseEditDialog>()),
+      key_database_infos_(GetGpgKeyDatabaseInfos()) {
   ui_->setupUi(this);
 
+  ui_->keyDBPathShowLabel->setHidden(true);
+
   ui_->keyDBNameLabel->setText(tr("Key Database Name"));
   ui_->keyDBPathLabel->setText(tr("Key Database Path"));
   ui_->selectKeyDBButton->setText(tr("Select A Key Database Path"));
@@ -53,13 +57,15 @@ KeyDatabaseEditDialog::KeyDatabaseEditDialog(QWidget* parent)
                                "exists readable directory."));
     }
 
-    path_ = QFileInfo(path).absoluteFilePath();
-    ui_->keyDBPathShowLabel->setText(path_);
+    if (!path.trimmed().isEmpty()) {
+      path_ = QFileInfo(path).absoluteFilePath();
+      ui_->keyDBPathShowLabel->setText(path_);
+      ui_->keyDBPathShowLabel->setHidden(false);
+    }
   });
 
   connect(ui_->buttonBox, &QDialogButtonBox::accepted, this,
           &KeyDatabaseEditDialog::slot_button_box_accepted);
-  connect(ui_->buttonBox, &QDialogButtonBox::accepted, this, &QDialog::accept);
   connect(ui_->buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
   setAttribute(Qt::WA_DeleteOnClose);
   setModal(true);
@@ -67,7 +73,29 @@ KeyDatabaseEditDialog::KeyDatabaseEditDialog(QWidget* parent)
 
 void KeyDatabaseEditDialog::slot_button_box_accepted() {
   name_ = ui_->keyDBNameLineEdit->text();
+
+  if (name_.isEmpty()) {
+    slot_show_err_msg(tr("The key database name cannot be empty."));
+    return;
+  }
+
+  if (path_.isEmpty()) {
+    slot_show_err_msg(tr("The key database path cannot be empty."));
+    return;
+  }
+
+  for (const auto& info : key_database_infos_) {
+    if (info.name == name_) {
+      slot_show_err_msg(tr("A key database with the name '%1' already exists. "
+                           "Please choose a different name.")
+                            .arg(name_));
+      return;
+    }
+  }
+
+  slot_clear_err_msg();
   emit SignalKeyDatabaseInfoAccepted(name_, path_);
+  this->accept();
 }
 
 auto KeyDatabaseEditDialog::check_custom_gnupg_key_database_path(
@@ -82,8 +110,18 @@ void KeyDatabaseEditDialog::SetDefaultName(QString name) {
   name_ = std::move(name);
 }
 
-void KeyDatabaseEditDialog::SetDefaultPath(QString path) {
+void KeyDatabaseEditDialog::SetDefaultPath(const QString& path) {
   path_ = QFileInfo(path).absoluteFilePath();
   ui_->keyDBPathShowLabel->setText(path_);
 }
+void KeyDatabaseEditDialog::slot_show_err_msg(const QString& error_msg) {
+  ui_->errorLabel->setText(error_msg);
+  ui_->errorLabel->setStyleSheet("color: red;");
+  ui_->errorLabel->setHidden(false);
+}
+
+void KeyDatabaseEditDialog::slot_clear_err_msg() {
+  ui_->errorLabel->setText({});
+  ui_->errorLabel->setHidden(true);
+}
 };  // namespace GpgFrontend::UI

src/ui/dialog/KeyDatabaseEditDialog.h

@@ -30,6 +30,7 @@
 
 #include <utility>
 
+#include "core/model/KeyDatabaseInfo.h"
 #include "ui/dialog/GeneralDialog.h"
 
 class Ui_KeyDatabaseEditDialog;
@@ -42,7 +43,7 @@ class KeyDatabaseEditDialog : public GeneralDialog {
 
   void SetDefaultName(QString name);
 
-  void SetDefaultPath(QString path);
+  void SetDefaultPath(const QString& path);
 
  signals:
   void SignalKeyDatabaseInfoAccepted(QString name, QString path);
@@ -51,9 +52,14 @@ class KeyDatabaseEditDialog : public GeneralDialog {
   std::shared_ptr<Ui_KeyDatabaseEditDialog> ui_;  ///<
   QString name_;
   QString path_;
+  QList<KeyDatabaseInfo> key_database_infos_;
 
   void slot_button_box_accepted();
 
+  void slot_show_err_msg(const QString& error_msg);
+
+  void slot_clear_err_msg();
+
   auto check_custom_gnupg_key_database_path(const QString& path) -> bool;
 };
 

ui/KeyDatabaseEditDialog.ui

@@ -24,7 +24,14 @@
       </widget>
      </item>
      <item>
-      <widget class="QLineEdit" name="keyDBNameLineEdit"/>
+      <widget class="QLineEdit" name="keyDBNameLineEdit">
+       <property name="maxLength">
+        <number>18</number>
+       </property>
+       <property name="clearButtonEnabled">
+        <bool>true</bool>
+       </property>
+      </widget>
      </item>
      <item>
       <widget class="QLabel" name="keyDBPathLabel">
@@ -53,7 +60,7 @@
      <item>
       <spacer name="verticalSpacer">
        <property name="orientation">
-        <enum>Qt::Vertical</enum>
+        <enum>Qt::Orientation::Vertical</enum>
        </property>
        <property name="sizeHint" stdset="0">
         <size>
@@ -63,15 +70,25 @@
        </property>
       </spacer>
      </item>
+     <item>
+      <widget class="QLabel" name="errorLabel">
+       <property name="text">
+        <string/>
+       </property>
+       <property name="wordWrap">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
     </layout>
    </item>
    <item>
     <widget class="QDialogButtonBox" name="buttonBox">
      <property name="orientation">
-      <enum>Qt::Horizontal</enum>
+      <enum>Qt::Orientation::Horizontal</enum>
      </property>
      <property name="standardButtons">
-      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+      <set>QDialogButtonBox::StandardButton::Cancel|QDialogButtonBox::StandardButton::Ok</set>
      </property>
     </widget>
    </item>
@@ -79,22 +96,6 @@
  </widget>
  <resources/>
  <connections>
-  <connection>
-   <sender>buttonBox</sender>
-   <signal>accepted()</signal>
-   <receiver>KeyDatabaseEditDialog</receiver>
-   <slot>accept()</slot>
-   <hints>
-    <hint type="sourcelabel">
-     <x>248</x>
-     <y>254</y>
-    </hint>
-    <hint type="destinationlabel">
-     <x>157</x>
-     <y>274</y>
-    </hint>
-   </hints>
-  </connection>
   <connection>
    <sender>buttonBox</sender>
    <signal>rejected()</signal>