Complete refactor of Browser Integration classes

* Removed option to attach KeePassXC to the browser extension. Users must use the proxy application to communicate with KeePassXC.
* Significantly streamlined proxy code. Used same implementation of stdin/stdout interface across all platforms.
* Moved browser service entry point to BrowserService class instead of NativeMessagingHost. BrowserService now coordinates the communication to/from clients.
* Moved settings page definition out of MainWindow
* Decoupled BrowserService from DatabaseTabWidget
* Reduced complexity of various functions and cleaned the ABI (public vs private).
* Eliminated BrowserClients class, moved functionality into the BrowserService
* Renamed HostInstaller to NativeMessageInstaller and renamed NativeMessageHost to BrowserHost.
* Recognize XDG_CONFIG_HOME when installing native message file on Linux. Fix #4121 and fix #4123.

tests/TestBrowser.cpp

@@ -16,11 +16,13 @@
  */
 
 #include "TestBrowser.h"
+
 #include "TestGlobal.h"
 #include "browser/BrowserSettings.h"
 #include "core/Tools.h"
 #include "crypto/Crypto.h"
 #include "sodium/crypto_box.h"
+
 #include <QString>
 
 QTEST_GUILESS_MAIN(TestBrowser)
@@ -35,12 +37,12 @@ const QString CLIENTID = "testClient";
 void TestBrowser::initTestCase()
 {
     QVERIFY(Crypto::init());
-    m_browserService.reset(new BrowserService(nullptr));
-    m_browserAction.reset(new BrowserAction(*m_browserService.data()));
+    m_browserService = browserService();
 }
 
-void TestBrowser::cleanupTestCase()
+void TestBrowser::init()
 {
+    m_browserAction.reset(new BrowserAction());
 }
 
 /**
@@ -54,7 +56,7 @@ void TestBrowser::testChangePublicKeys()
     json["publicKey"] = PUBLICKEY;
     json["nonce"] = NONCE;
 
-    auto response = m_browserAction->handleAction(json);
+    auto response = m_browserAction->processClientMessage(json);
     QCOMPARE(response["action"].toString(), QString("change-public-keys"));
     QCOMPARE(response["publicKey"].toString() == PUBLICKEY, false);
     QCOMPARE(response["success"].toString(), TRUE_STR);
@@ -393,62 +395,6 @@ void TestBrowser::testSortEntries()
     QCOMPARE(result[3]->url(), QString("github.com/login"));
 }
 
-void TestBrowser::testGetDatabaseGroups()
-{
-    auto db = QSharedPointer<Database>::create();
-    auto* root = db->rootGroup();
-
-    QScopedPointer<Group> group1(new Group());
-    group1->setParent(root);
-    group1->setName("group1");
-
-    QScopedPointer<Group> group2(new Group());
-    group2->setParent(root);
-    group2->setName("group2");
-
-    QScopedPointer<Group> group3(new Group());
-    group3->setParent(root);
-    group3->setName("group3");
-
-    QScopedPointer<Group> group2_1(new Group());
-    group2_1->setParent(group2.data());
-    group2_1->setName("group2_1");
-
-    QScopedPointer<Group> group2_2(new Group());
-    group2_2->setParent(group2.data());
-    group2_2->setName("group2_2");
-
-    QScopedPointer<Group> group2_1_1(new Group());
-    group2_1_1->setParent(group2_1.data());
-    group2_1_1->setName("group2_1_1");
-
-    auto result = m_browserService->getDatabaseGroups(db);
-    QCOMPARE(result.length(), 1);
-
-    auto groups = result["groups"].toArray();
-    auto first = groups.at(0);
-    auto children = first.toObject()["children"].toArray();
-    QCOMPARE(first.toObject()["name"].toString(), QString("Root"));
-    QCOMPARE(children.size(), 3);
-
-    auto firstChild = children.at(0);
-    auto secondChild = children.at(1);
-    auto thirdChild = children.at(2);
-    QCOMPARE(firstChild.toObject()["name"].toString(), QString("group1"));
-    QCOMPARE(secondChild.toObject()["name"].toString(), QString("group2"));
-    QCOMPARE(thirdChild.toObject()["name"].toString(), QString("group3"));
-
-    auto childrenOfSecond = secondChild.toObject()["children"].toArray();
-    auto firstOfCOS = childrenOfSecond.at(0);
-    auto secondOfCOS = childrenOfSecond.at(1);
-    QCOMPARE(firstOfCOS.toObject()["name"].toString(), QString("group2_1"));
-    QCOMPARE(secondOfCOS.toObject()["name"].toString(), QString("group2_2"));
-
-    auto lastChildren = firstOfCOS.toObject()["children"].toArray();
-    auto lastChild = lastChildren.at(0);
-    QCOMPARE(lastChild.toObject()["name"].toString(), QString("group2_1_1"));
-}
-
 QList<Entry*> TestBrowser::createEntries(QStringList& urls, Group* root) const
 {
     QList<Entry*> entries;

tests/TestBrowser.h

@@ -30,7 +30,7 @@ class TestBrowser : public QObject
 
 private slots:
     void initTestCase();
-    void cleanupTestCase();
+    void init();
 
     void testChangePublicKeys();
     void testEncryptMessage();
@@ -46,14 +46,13 @@ private slots:
     void testInvalidEntries();
     void testSubdomainsAndPaths();
     void testSortEntries();
-    void testGetDatabaseGroups();
     void testValidURLs();
 
 private:
     QList<Entry*> createEntries(QStringList& urls, Group* root) const;
 
     QScopedPointer<BrowserAction> m_browserAction;
-    QScopedPointer<BrowserService> m_browserService;
+    QPointer<BrowserService> m_browserService;
 };
 
 #endif // KEEPASSXC_TESTBROWSER_H

tests/gui/TestGuiBrowser.cpp

@@ -31,6 +31,7 @@
 #include <QTableView>
 #include <QToolBar>
 
+#include "browser/BrowserService.h"
 #include "config-keepassx-tests.h"
 #include "core/Bootstrap.h"
 #include "core/Config.h"
@@ -82,30 +83,19 @@ void TestGuiBrowser::initTestCase()
     Bootstrap::restoreMainWindowState(*m_mainWindow);
     m_tabWidget = m_mainWindow->findChild<DatabaseTabWidget*>("tabWidget");
     m_mainWindow->show();
-
-    // Load the NewDatabase.kdbx file into temporary storage
-    QFile sourceDbFile(QString(KEEPASSX_TEST_DATA_DIR).append("/NewDatabaseBrowser.kdbx"));
-    QVERIFY(sourceDbFile.open(QIODevice::ReadOnly));
-    QVERIFY(Tools::readAllFromDevice(&sourceDbFile, m_dbData));
-    sourceDbFile.close();
 }
 
 // Every test starts with opening the temp database
 void TestGuiBrowser::init()
 {
     m_dbFile.reset(new TemporaryFile());
-    // Write the temp storage to a temp database file for use in our tests
-    QVERIFY(m_dbFile->open());
-    QCOMPARE(m_dbFile->write(m_dbData), static_cast<qint64>((m_dbData.size())));
-    m_dbFileName = QFileInfo(m_dbFile->fileName()).fileName();
-    m_dbFilePath = m_dbFile->fileName();
-    m_dbFile->close();
+    m_dbFile->copyFromFile(QString(KEEPASSX_TEST_DATA_DIR).append("/NewDatabaseBrowser.kdbx"));
 
     // make sure window is activated or focus tests may fail
     m_mainWindow->activateWindow();
     QApplication::processEvents();
 
-    fileDialog()->setNextFileName(m_dbFilePath);
+    fileDialog()->setNextFileName(m_dbFile->fileName());
     triggerAction("actionDatabaseOpen");
 
     auto* databaseOpenWidget = m_tabWidget->currentDatabaseWidget()->findChild<QWidget*>("databaseOpenWidget");
@@ -241,6 +231,28 @@ void TestGuiBrowser::testAdditionalURLs()
     }
 }
 
+void TestGuiBrowser::testGetDatabaseGroups()
+{
+    auto result = browserService()->getDatabaseGroups();
+    QCOMPARE(result.length(), 1);
+
+    auto groups = result["groups"].toArray();
+    auto first = groups.at(0);
+    auto children = first.toObject()["children"].toArray();
+    QCOMPARE(first.toObject()["name"].toString(), QString("NewDatabase"));
+    QCOMPARE(children.size(), 6);
+
+    auto firstChild = children.at(0).toObject();
+    auto secondChild = children.at(1).toObject();
+    QCOMPARE(firstChild["name"].toString(), QString("General"));
+    QCOMPARE(secondChild["name"].toString(), QString("Windows"));
+
+    auto subGroups = firstChild["children"].toArray();
+    QCOMPARE(subGroups.count(), 1);
+    auto subGroupObj = subGroups.at(0).toObject();
+    QCOMPARE(subGroupObj["name"].toString(), QString("SubGroup"));
+}
+
 void TestGuiBrowser::triggerAction(const QString& name)
 {
     auto* action = m_mainWindow->findChild<QAction*>(name);

tests/gui/TestGuiBrowser.h

@@ -45,6 +45,7 @@ private slots:
 
     void testEntrySettings();
     void testAdditionalURLs();
+    void testGetDatabaseGroups();
 
 private:
     void triggerAction(const QString& name);
@@ -57,10 +58,7 @@ private:
     QPointer<DatabaseTabWidget> m_tabWidget;
     QPointer<DatabaseWidget> m_dbWidget;
     QSharedPointer<Database> m_db;
-    QByteArray m_dbData;
     QScopedPointer<TemporaryFile> m_dbFile;
-    QString m_dbFileName;
-    QString m_dbFilePath;
 };
 
 #endif // KEEPASSXC_TESTGUIBROWSER_H