Implement default best-yield resource and long-press resource selection for city slots

gamemanager.h

@@ -7,6 +7,7 @@
 #include "player.h"
 #include "unitconfig.h"
 #include "buildingconfig.h"
+#include "roadconfig.h"
 #include "unit.h"
 #include "city.h"
 #include "matrix2d.h"
@@ -18,7 +19,8 @@ enum class ActionMode {
     Move,
     Attack,
     BuildCity,
-    BuildFarm
+    BuildFarm,
+    BuildRoad
 };
 
 struct TileImprovement {
@@ -29,6 +31,15 @@ struct TileImprovement {
     QVector3D worldPos;
 };
 
+struct TileRoad {
+    QString roadTypeId = "dirt";
+    int tileX = 0;
+    int tileY = 0;
+    int playerId = 1;
+    QVector3D worldPos;
+    unsigned char connectionMask = 0; // bit e (0..5) indicates connected across edge e
+};
+
 struct FloatingText {
     QString text;
     QVector3D worldPos;
@@ -48,6 +59,8 @@ public:
     UnitConfigManager& unitConfigs() { return m_unitConfigManager; }
     BuildingConfigManager& buildingConfigs() { return m_buildingConfigManager; }
     const BuildingConfigManager& buildingConfigs() const { return m_buildingConfigManager; }
+    RoadConfigManager& roadConfigs() { return m_roadConfigManager; }
+    const RoadConfigManager& roadConfigs() const { return m_roadConfigManager; }
 
     const std::vector<std::shared_ptr<Unit>>& getUnits() const { return m_units; }
     const std::vector<City>& getCities() const { return m_cities; }
@@ -79,6 +92,10 @@ public:
     CityYieldSummary calculateCityYields(const City &city, Matrix2D<TerrainPoint> *mapPoints, int numPoints05) const;
     void processTickYields(Matrix2D<TerrainPoint> *mapPoints, int numPoints05);
 
+    QMap<QString, int> getTileYields(int tx, int ty, Matrix2D<TerrainPoint> *mapPoints, int numPoints05) const;
+    int getTileYield(int tx, int ty, const QString &res, Matrix2D<TerrainPoint> *mapPoints, int numPoints05) const;
+    QString getBestTileResource(int tx, int ty, Matrix2D<TerrainPoint> *mapPoints, int numPoints05) const;
+
     bool isTileOwned(int tx, int ty, int *outOwnerCityId = nullptr) const;
     bool buyTileForCity(int cityId, int tx, int ty);