public async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)] HttpRequest req,
ILogger logger,
CancellationToken token)
{
return(await req.Wrap <ToyDistributionRequest>(logger, async request =>
{
if (request == null)
{
return new BadRequestErrorMessageResult("Request is empty.");
}
if (string.IsNullOrWhiteSpace(request.Id))
{
return new BadRequestErrorMessageResult($"Missing required value for property '{nameof(SantaRescueRequest.Id)}'.");
}
if (!Guid.TryParse(request.Id, out Guid id))
{
return new BadRequestErrorMessageResult($"Value for property '{nameof(SantaRescueRequest.Id)}' is not a valid ID or has an invalid format (example of valid value and format for Unique Identifier (GUID): '135996C9-3090-4399-85DB-1F5041DF1DDD').");
}
Attempt attempt = await _attemptService.Get(id, 3, token);
if (attempt == null)
{
return new NotFoundResult();
}
if (!attempt.ReindeersRescueAt.HasValue)
{
return new BadRequestErrorMessageResult($"It looks like you're reusing an old ID from a previous failed attempt created {attempt.Created} - you need to start all over again - remember not to hard code any IDs in your application.");
}
var messages = new List <string>();
if (request.ToyDistribution == null)
{
messages.Add($"Missing required value for property '{nameof(ToyDistributionRequest.ToyDistribution).WithFirstCharToLowercase()}'.");
}
else if (request.ToyDistribution.Length != ToyDistributionProblem.ListLength)
{
messages.Add($"Invalid value for property '{nameof(ToyDistributionRequest.ToyDistribution).WithFirstCharToLowercase()}'. Expected number of elements to be {ToyDistributionProblem.ListLength} - but was {request.ToyDistribution.Length}.");
}
else
{
for (int i = 0; i < request.ToyDistribution.Length; i++)
{
ToyDistributionRequest.ChildGettingToy pair = request.ToyDistribution[i];
if (pair == null)
{
messages.Add($"Missing required value for property '{nameof(ToyDistributionRequest.ToyDistribution).WithFirstCharToLowercase()}[{i}]'.");
}
else if (string.IsNullOrWhiteSpace(pair.ChildName))
{
messages.Add($"Missing required value for property '{nameof(ToyDistributionRequest.ToyDistribution).WithFirstCharToLowercase()}[{i}].{nameof(ToyDistributionRequest.ChildGettingToy.ChildName).WithFirstCharToLowercase()}'");
}
else if (pair.ChildName.Length >= 100)
{
messages.Add($"Invalid value for property '{nameof(ToyDistributionRequest.ToyDistribution).WithFirstCharToLowercase()}[{i}].{nameof(ToyDistributionRequest.ChildGettingToy.ChildName).WithFirstCharToLowercase()}' - length exceeds maximum of 100 characters.");
}
else if (string.IsNullOrWhiteSpace(pair.ToyName))
{
messages.Add($"Missing required value for property '{nameof(ToyDistributionRequest.ToyDistribution).WithFirstCharToLowercase()}[{i}].{nameof(ToyDistributionRequest.ChildGettingToy.ToyName).WithFirstCharToLowercase()}'");
}
else if (pair.ToyName.Length >= 100)
{
messages.Add($"Invalid value for property '{nameof(ToyDistributionRequest.ToyDistribution).WithFirstCharToLowercase()}[{i}].{nameof(ToyDistributionRequest.ChildGettingToy.ToyName).WithFirstCharToLowercase()}' - length exceeds maximum of 100 characters.");
}
}
string[] duplicateChildNames = request.ToyDistribution
.Where(x => !string.IsNullOrWhiteSpace(x?.ChildName))
.GroupBy(x => x.ChildName, StringComparer.OrdinalIgnoreCase)
.Where(x => x.Count() > 1)
.Select(x => x.Key)
.ToArray();
if (duplicateChildNames.Length > 0)
{
messages.Add($"You have the same child name mentioned more than once in the request. This is not allowed. Duplicate name(s): {string.Join(", ", duplicateChildNames)}");
}
string[] duplicateToyNames = request.ToyDistribution
.Where(x => !string.IsNullOrWhiteSpace(x?.ToyName))
.GroupBy(x => x.ToyName, StringComparer.OrdinalIgnoreCase)
.Where(x => x.Count() > 1)
.Select(x => x.Key)
.ToArray();
if (duplicateToyNames.Length > 0)
{
messages.Add($"You have the same toy name mentioned more than once in the request. This is not allowed. Duplicate name(s): {string.Join(", ", duplicateToyNames)}");
}
}
if (messages.Count == 0)
{
ToyDistributionProblem problem = await _toyDistributionProblemRepository.Get(attempt, token);
if (problem == null)
{
throw new InvalidOperationException($"No problem found for {attempt.Id}.");
}
string[] missingChildren = problem.Children
.Select(x => x.Name)
.Except(request.ToyDistribution?.Select(x => x.ChildName) ?? new string[0])
.ToArray();
if (missingChildren.Length > 0)
{
messages.Add($@"One or more children names are missing from your list:
- Expected: {string.Join(", ", problem.Children.Select(x => x.Name))}
- Actual: {string.Join(", ", request.ToyDistribution?.Select(x => x.ChildName) ?? new string[0])}");
}
else
{
var proposedSolution = new ToyDistributionSolution
{
List = request.ToyDistribution?.ToDictionary(x => x.ChildName, x => x.ToyName)
};
if (!proposedSolution.IsValidFor(problem))
{
ToyDistributionSolution validSolution = problem.CreateSolution();
messages.Add($@"The proposed solution was not found correct. Below is a correct solution to the problem:
{string.Join(Environment.NewLine, validSolution.List.Select(x => $"\t\t- '{x.Key}' gets '{x.Value}'"))}");
}
}
}
if (messages.Count > 0)
{
attempt.InvalidSolution = request.ToyDistribution?
.Take(ToyDistributionProblem.ListLength * 2)
.Select(x => new KeyValuePair <string, string>(
x?.ChildName.MaxLengthWithDots(100),
x?.ToyName.MaxLengthWithDots(100)))
.ToArray();
await _attemptService.Save(attempt, 4, token);
return new BadRequestErrorMessageResult($@"Unfortunately you have one or more errors:
{string.Join(Environment.NewLine, messages.Select(x => $"\t - {x}"))}
Please try again - and remember, as always, you'll have to start all over again.");
}
attempt.CompletedAt = DateTimeOffset.UtcNow;
await _attemptService.Save(attempt, 4, token);
return new OkObjectResult(new ToyDistributionResponse(await _attemptService.GetStatistics(attempt, token)));
}));
}
