private boolean isTilePlacementWithBridgeAllowed(Tile tile, Position p, Location bridgeLoc) {
if (!tile.isBridgeAllowed(bridgeLoc)) return false;
for (Entry<Location, Tile> e : getBoard().getAdjacentTilesMap(p).entrySet()) {
Tile adjacent = e.getValue();
Location rel = e.getKey();
char adjacentSide = adjacent.getEdge(rel.rev());
char tileSide = tile.getEdge(rel);
if (rel.intersect(bridgeLoc) != null) {
if (adjacentSide != 'R') return false;
} else {
if (adjacentSide != tileSide) return false;
}
}
return true;
}
public BridgeAction prepareMandatoryBridgeAction() {
Tile tile = game.getCurrentTile();
for (Entry<Location, Tile> entry :
getBoard().getAdjacentTilesMap(tile.getPosition()).entrySet()) {
Tile adjacent = entry.getValue();
Location rel = entry.getKey();
char adjacentSide = adjacent.getEdge(rel.rev());
char tileSide = tile.getEdge(rel);
if (tileSide != adjacentSide) {
Location bridgeLoc = getBridgeLocationForAdjacent(rel);
BridgeAction action = prepareTileBridgeAction(tile, null, bridgeLoc);
if (action != null) return action;
return prepareTileBridgeAction(adjacent, null, bridgeLoc);
}
}
throw new IllegalStateException();
}
private boolean isTilePlacementWithOneAdjacentBridgeAllowed(Tile tile, Position p) {
boolean bridgeUsed = false;
for (Entry<Location, Tile> e : getBoard().getAdjacentTilesMap(p).entrySet()) {
Tile adjacent = e.getValue();
Location rel = e.getKey();
char tileSide = tile.getEdge(rel);
char adjacentSide = adjacent.getEdge(rel.rev());
if (tileSide != adjacentSide) {
if (bridgeUsed) return false;
if (tileSide != 'R') return false;
Location bridgeLoc = getBridgeLocationForAdjacent(rel);
if (!isBridgePlacementAllowed(adjacent, adjacent.getPosition(), bridgeLoc)) return false;
bridgeUsed = true;
}
}
return bridgeUsed; // ok if exactly one bridge is used
}
protected boolean check(Tile tile, Location rel, Board board) {
return getEdge(rel) == tile.getEdge(rel.rev());
}