/// <summary>
/// Build dependency injection
/// </summary>
/// <param name="fileOption"></param>
/// <param name="solverOption"></param>
/// <returns></returns>
public static IServiceProvider BuildDI(CommandOption fileOption, CommandOption solverOption)
{
// Build configuration
var configuration = new ConfigurationBuilder()
.SetBasePath(AppContext.BaseDirectory)
.AddJsonFile("mazesettings.json", false)
.Build();
var services = new ServiceCollection();
// Add logging
var logger = new LoggerFactory()
.AddFile("Logs/mazeapp-{Date}.log")
.AddConsole()
.AddDebug(minLevel: LogLevel.Trace);
services.AddSingleton(logger).AddLogging();
// Load settings
var settings = new MazeSettings();
configuration.GetSection("Maze").Bind(settings);
if ((fileOption != null) && fileOption.HasValue())
{
settings.MazeFile = fileOption.Value();
}
if ((solverOption != null) && solverOption.HasValue())
{
settings.MazeSolver = solverOption.Value();
}
try
{
// validate settings
Validations.ValidateConfiguration(settings);
}
catch (InvalidConfigurationParameterException e)
{
logger.CreateLogger <Program>().LogError(e, e.Message);
throw;
}
// Add settings
services.AddSingleton <MazeSettings>(settings);
// Add runner class
services.AddTransient <Interfaces.IMazeGrid, Maze.MazeGrid>();
// Add loader class
services.AddTransient <Interfaces.IMazeLoader, Loaders.MazeTextLoader>();
// Add solver classes
switch (settings.MazeSolver)
{
case "BFS":
services.AddTransient <Interfaces.IMazeSolver, BFSGraphSolver>();
break;
case "BFSR":
services.AddTransient <Interfaces.IMazeSolver, BFSRecursiveGraphSolver>();
break;
case "DFS":
services.AddTransient <Interfaces.IMazeSolver, DFSGraphSolver>();
break;
case "DFSR":
services.AddTransient <Interfaces.IMazeSolver, DFSRecursiveGraphSolver>();
break;
case "DJK":
services.AddTransient <Interfaces.IMazeSolver, DijkstraGraphSolver>();
break;
default:
services.AddTransient <Interfaces.IMazeSolver, BFSGraphSolver>();
break;
}
// register a factory to return a solver from settings
var serviceProvider = services.BuildServiceProvider();
return(serviceProvider);
}
/// <summary>
/// Validates App Configuration parameters
/// </summary>
/// <param name="settings"></param>
public static void ValidateConfiguration(MazeSettings settings)
{
var properties = settings.GetType().GetTypeInfo().DeclaredProperties;
// check for null , 0 or negative int and throw on invalid
foreach (var property in properties)
{
if (property.PropertyType == typeof(string))
{
string val = (string)property.GetValue(settings);
if (string.IsNullOrEmpty(val))
{
throw new InvalidConfigurationParameterException(property.Name, "Parameter can not be Null or Empty");
}
}
else if (property.PropertyType == typeof(int))
{
int?val = (int)property.GetValue(settings);
// we require a minimum of 2x2
if ((val ?? 0) <= 1)
{
throw new InvalidConfigurationParameterException(property.Name, "Parameter can not be Null or smalle than 2");
}
}
}
// nice, now lets check the characters
var validList = new List <string>();
if (settings.OpenChar.Length > 1)
{
throw new InvalidConfigurationParameterException("OpenChar", "Parameter is longer than one character");
}
validList.Add(settings.OpenChar);
if (settings.WallChar.Length > 1 || validList.Contains(settings.WallChar))
{
throw new InvalidConfigurationParameterException("WallChar", "Parameter is longer than one character or already in use");
}
validList.Add(settings.WallChar);
if (settings.StartChar.Length > 1 || validList.Contains(settings.StartChar))
{
throw new InvalidConfigurationParameterException("StartChar", "Parameter is longer than one character or already in use");
}
validList.Add(settings.StartChar);
if (settings.FinishChar.Length > 1 || validList.Contains(settings.FinishChar))
{
throw new InvalidConfigurationParameterException("FinishChar", "Parameter is longer than one character or already in use");
}
// clean up
validList.Clear();
}