Replace dedicated functions with single binary function

There are only 1 or 2 calls to specific directories in the codebase,
hence this is unnecessary and just leads to bloat.

src/main.cpp

@@ -48,11 +48,20 @@ int main( int argc, char* argv[] )
                                                    commandLineArgs.forceNoSound,
                                                    qmlEngine );
 
-        QString path = QStandardPaths::locate(
-            QStandardPaths::AppDataLocation,
-            QStringLiteral( "res/qml/common/mainwidget.qml" ) );
+        const auto path
+            = paths::binaryDirectoryFindFile( "res/qml/common/mainwidget.qml" );
 
-        QQmlComponent component( &qmlEngine, QUrl::fromLocalFile( path ) );
+        if ( !path.has_value() )
+        {
+            LOG( ERROR ) << "Unable to find file '" << *path << "'.";
+            throw std::runtime_error(
+                "Unable to find critical file. See log for more information." );
+        }
+
+        const auto url
+            = QUrl::fromLocalFile( QString::fromStdString( ( *path ) ) );
+
+        QQmlComponent component( &qmlEngine, url );
         auto errors = component.errors();
         for ( auto& e : errors )
         {

src/utils/paths.cpp

@@ -21,8 +21,10 @@ optional<string> binaryDirectory()
 
 optional<string> binaryDirectoryFindFile( const string fileName )
 {
-    const auto path = QStandardPaths::locate(
-        QStandardPaths::AppDataLocation, QString::fromStdString( fileName ) );
+    const auto path
+        = QStandardPaths::locate( QStandardPaths::AppDataLocation,
+                                  QString::fromStdString( fileName ),
+                                  QStandardPaths::LocateFile );
     if ( path == "" )
     {
         LOG( ERROR ) << "Could not find file '" << fileName.c_str()
@@ -33,36 +35,20 @@ optional<string> binaryDirectoryFindFile( const string fileName )
     return path.toStdString();
 }
 
-optional<string> qmlDirectory()
+optional<string> binaryDirectoryFindDirectory( string directoryName )
 {
     const auto path
-        = QStandardPaths::locate( QStandardPaths::AppDataLocation, "res/qml/" );
+        = QStandardPaths::locate( QStandardPaths::AppDataLocation,
+                                  QString::fromStdString( directoryName ),
+                                  QStandardPaths::LocateDirectory );
     if ( path == "" )
     {
-        LOG( ERROR ) << "Unable to find QML directory.";
+        LOG( ERROR ) << "Could not find directory '" << directoryName.c_str()
+                     << "' in binary directory.";
         return std::nullopt;
     }
 
     return path.toStdString();
 }
 
-optional<string> qmlDirectoryFindFile( string fileName )
-{
-    const auto qmlPath = qmlDirectory();
-    if ( !qmlPath.has_value() )
-    {
-        return std::nullopt;
-    }
-
-    const auto path = ( *qmlPath ) + fileName;
-    QFileInfo filePath( QString::fromStdString( path ) );
-    if ( !filePath.exists() )
-    {
-        LOG( ERROR ) << "File: '" << path << "' not found.";
-        return std::nullopt;
-    }
-
-    return std::move( path );
-}
-
 } // namespace paths

src/utils/paths.h

@@ -9,15 +9,7 @@ using std::string;
 
 optional<string> binaryDirectory();
 optional<string> binaryDirectoryFindFile( string fileName );
-
-optional<string> qmlDirectory();
-optional<string> qmlDirectoryFindFile( string fileName );
-
-optional<string> imageDirectory();
-optional<string> imageDirectoryFindFile( string fileName );
-
-optional<string> soundDirectory();
-optional<string> soundDirectoryFindFile( string fileName );
+optional<string> binaryDirectoryFindDirectory( string directoryName );
 
 optional<string> settingsDirectory();
 optional<string> settingsDirectoryFindFile( string fileName );