private static IEnumerable <string> ValidateRequest(PathfindingRequestDto pathfindingRequestDto)
{
var validator = new PathfindingRequestDtoValidator();
var validationResult = validator.Validate(pathfindingRequestDto);
return(validationResult.Errors.Select(error => error.ErrorMessage));
}
public Grid MapPathfindingRequestDto(PathfindingRequestDto pathfindingRequestDto)
{
GridNode start = null;
GridNode finish = null;
GridNode[][] grid = pathfindingRequestDto.Grid.Select((row, rowIndex) =>
row.Select((nodeDto, colIndex) =>
{
var node = new GridNode
{
Type = (GridNodeType)nodeDto.Type,
Visited = false,
Weight = nodeDto.Weight,
TotalWeight = 0,
Heuristic = 0,
Position = new Position(rowIndex, colIndex),
PreviousGridNode = null
};
if (node.Type == GridNodeType.Start)
{
start = node;
}
if (node.Type == GridNodeType.Finish)
{
finish = node;
}
return(node);
}).ToArray()
).ToArray();
return(pathfindingRequestDto.SearchDiagonal
? new HorizontalDiagonalGrid(grid)
{
Start = start, Finish = finish
}
: new HorizontalGrid(grid)
{
Start = start, Finish = finish
});
}
private IActionResult GenerateResponse(PathfindingAlgorithm algorithm, PathfindingRequestDto pathfindingRequestDto)
{
var errors = ValidateRequest(pathfindingRequestDto);
if (errors.Any())
{
return(BadRequest(new ValidationErrorResponseDto
{
ErrorMessages = errors
}));
}
var grid = _requestMapper.MapPathfindingRequestDto(pathfindingRequestDto);
var pathfindingResult = algorithm switch
{
PathfindingAlgorithm.BreadthFirstSearch => _pathfindingService.BreadthFirstSearch(grid),
PathfindingAlgorithm.Dijkstra => _pathfindingService.Dijkstra(grid),
PathfindingAlgorithm.AStar => _pathfindingService.AStar(grid),
_ => throw new InvalidEnumArgumentException()
};
return(Ok(_responseMapper.MapPathfindingResult(pathfindingResult)));
}
public IActionResult AStar(PathfindingRequestDto pathfindingRequestDto)
{
return(GenerateResponse(PathfindingAlgorithm.AStar, pathfindingRequestDto));
}
public IActionResult Dijkstra(PathfindingRequestDto pathfindingRequestDto)
{
return(GenerateResponse(PathfindingAlgorithm.Dijkstra, pathfindingRequestDto));
}
public IActionResult BreadthFirstSearch(PathfindingRequestDto pathfindingRequestDto)
{
return(GenerateResponse(PathfindingAlgorithm.BreadthFirstSearch, pathfindingRequestDto));
}
