finish defense post

src/core/game/GameImpl.ts

@@ -68,14 +68,14 @@ export class GameImpl implements MutableGame {
     addTileDefenseBonus(tile: Tile, unit: Unit, amount: number): DefenseBonus {
         const df = { unit: unit, tile: tile, amount: amount };
         (tile as TileImpl)._defenseBonuses.push(df)
-        // this.eventBus.emit(new TileEvent(tile))
+        this.eventBus.emit(new TileEvent(tile))
         return df
     }
 
     removeTileDefenseBonus(bonus: DefenseBonus): void {
         const t = bonus.tile as TileImpl
         t._defenseBonuses = t._defenseBonuses.filter(db => db != bonus)
-        // this.eventBus.emit(new TileEvent(bonus.tile))
+        this.eventBus.emit(new TileEvent(bonus.tile))
     }
 
     units(...types: UnitType[]): UnitImpl[] {

src/core/game/TileImpl.ts

@@ -20,6 +20,10 @@ export class TileImpl implements Tile {
         private readonly _terrain: TerrainTileImpl
     ) { }
 
+    terrainType(): TerrainType {
+        return this._terrain.type
+    }
+
     defenseBonus(player: Player): number {
         if (this.owner() == player) {
             throw Error(`cannot get defense bonus of tile already owned by player`)