protected async Task <KnowledgeSpace> findAllPossibleKnowledgeStates(List <List <int> > edges, List <int> allProblemIds, int knowledgeSpaceId)
{
Random rnd = new Random();
KnowledgeSpace ksWithAllStates = new KnowledgeSpace();
ksWithAllStates.Title = "All posible knowledge states for KS: " + knowledgeSpaceId.ToString();
ksWithAllStates.IsReal = false;
ksWithAllStates.Problems = new List <Problem>();
ksWithAllStates.Edges = new List <Edge>();
ksWithAllStates.ExpectedKnowledgeSpace = knowledgeSpaceId;
ksWithAllStates = await _knowledgeSpaceRepository.CreateKnowledgeSpace(ksWithAllStates);
Problem allStatesProblem = new Problem();
string headNodeTitle = string.Join(" ", allProblemIds);
allStatesProblem.Title = headNodeTitle;
allStatesProblem.KnowledgeSpaceId = ksWithAllStates.KnowledgeSpaceId;
allStatesProblem.X = 600;
allStatesProblem.Y = 180;
allStatesProblem = await _knowledgeSpaceRepository.addProblem(allStatesProblem);
List <int> leaves = findLeavesAmongEdges(edges, allProblemIds);
int i = 0;
foreach (int leaf in leaves)
{
List <int> remainingNodes = allProblemIds.Select(id => id).ToList();
remainingNodes.Remove(leaf);
createSubPossibleKStates(ksWithAllStates, edges, remainingNodes, allStatesProblem, leaf, rnd, allProblemIds.Count(), i, leaves.Count());
i++;
}
return(await _knowledgeSpaceRepository.GetSingleKnowledgeSpaceByIdWidthIncludes(ksWithAllStates.KnowledgeSpaceId));
}
protected async Task <int> determinePosibilitiesForAllStates(KnowledgeSpace ksWithAllStates, int realKsId, Dictionary <int, int> reverseMap, HttpClient httpClient)
{
int count = 0;
PossibleStatesWithPossibilities possibleStatesWithPossibilities = new PossibleStatesWithPossibilities();
foreach (var state in ksWithAllStates.Problems)
{
List <int> oneStateList = new List <int>();
foreach (string oneValueInState in state.Title.Split(' '))
{
int index;
if (int.TryParse(oneValueInState, out index))
{
oneStateList.Add(reverseMap[int.Parse(oneValueInState)]);
}
}
var json = JsonConvert.SerializeObject(oneStateList);
var content = new StringContent(json, Encoding.UTF8, "application/json");
var result = await httpClient.PostAsync("http://localhost:8000/kst/probability_for_state", content);
var a = await result.Content.ReadAsStringAsync();
dynamic someObject = JsonConvert.DeserializeObject <dynamic>(a);
var numberOfStudentsInState = JsonConvert.DeserializeObject <int>(someObject);
possibleStatesWithPossibilities.statePosibilities.Add(state.ProblemId, (float)numberOfStudentsInState);
count += numberOfStudentsInState;
}
foreach (KeyValuePair <int, float> entry in possibleStatesWithPossibilities.statePosibilities)
{
possibleStatesWithPossibilities.statePosibilities[entry.Key] = entry.Value / count;
}
possibleStatesWithPossibilities.states = ksWithAllStates.Problems;
possibleStatesWithPossibilities.KnowledgeSpaceId = realKsId;
possibleStatesWithPossibilities.StudentId = null;
possibleStatesWithPossibilities.Title = "Mapping knowlegde states to possibilities for knowledge states: " + ksWithAllStates.KnowledgeSpaceId;
foreach (Problem p in possibleStatesWithPossibilities.states)
{
p.statePosibility = possibleStatesWithPossibilities.statePosibilities[p.ProblemId];
_knowledgeSpaceRepository.updateProblem(p);
}
_possibleStatesWithPossibilitiesRepository.createPossibleStatesWithPossibilities(possibleStatesWithPossibilities);
return(0);
}
public async Task <KnowledgeSpace> CreateKnowledgeSpace(KnowledgeSpace knowledgeSpace)
{
ICollection <Problem> problems = knowledgeSpace.Problems.Select(s => s).ToList();
ICollection <Edge> edges = knowledgeSpace.Edges.Select(s => s).ToList();
knowledgeSpace.Problems = new List <Problem>();
knowledgeSpace.Edges = new List <Edge>();
EntityEntry <KnowledgeSpace> result = await _context.KnowledgeSpaces.AddAsync(knowledgeSpace);
_context.SaveChanges();
var map = new Dictionary <int, int>();
foreach (Problem problem in problems)
{
problem.KnowledgeSpaceId = result.Entity.KnowledgeSpaceId;
int problemID = problem.ProblemId;
problem.ProblemId = new int();
var savedProblem = _context.Problems.Add(problem);
_context.SaveChanges();
map.Add(problemID, savedProblem.Entity.ProblemId);
}
foreach (Edge edge in edges)
{
edge.EdgeId = new int();
edge.KnowledgeSpaceId = result.Entity.KnowledgeSpaceId;
edge.ProblemSourceId = map[edge.ProblemSourceId.Value];
edge.ProblemTargetId = map[edge.ProblemTargetId.Value];
_context.Edges.Add(edge);
_context.SaveChanges();
}
KnowledgeSpace finalresult = await _context.KnowledgeSpaces.FindAsync(result.Entity.KnowledgeSpaceId);
if (result != null)
{
return(finalresult);
}
return(null);
}
protected async void createSubPossibleKStates(KnowledgeSpace ksWithAllStates, List <List <int> > edges, List <int> remainingPreviousNodes, Problem previousProblem, int previousLeaf, Random rnd, int leavesCount, int leaveIndex, int remainingLeavesCount)
{
List <List <int> > remainingEdges = edges.FindAll(x =>
{
return(x[0] != previousLeaf && x[1] != previousLeaf);
});
string newNodeTitle = remainingPreviousNodes.Count() == 0 ? "EmptyNode" + ksWithAllStates.KnowledgeSpaceId : string.Join(" ", remainingPreviousNodes);
Problem someStateProblem = _knowledgeSpaceRepository.getProblemByTitle(newNodeTitle);
if (someStateProblem == null)
{
someStateProblem = new Problem();
someStateProblem.Title = newNodeTitle;
someStateProblem.KnowledgeSpaceId = ksWithAllStates.KnowledgeSpaceId;
int multiplier = remainingLeavesCount == 1 ? 0 : ((leaveIndex + 1) / remainingLeavesCount < 0.5 ? (1 + leaveIndex - remainingLeavesCount) : (1 + leaveIndex - remainingLeavesCount / 2));
someStateProblem.X = 600 + multiplier * 180;
someStateProblem.Y = 180 + (leavesCount - remainingPreviousNodes.Count()) * 200;
someStateProblem = await _knowledgeSpaceRepository.addProblem(someStateProblem);
}
Edge edge = new Edge();
edge.KnowledgeSpaceId = ksWithAllStates.KnowledgeSpaceId;
edge.ProblemSourceId = someStateProblem.ProblemId;
edge.ProblemTargetId = previousProblem.ProblemId;
edge = await _knowledgeSpaceRepository.addEdge(edge);
List <int> leaves = findLeavesAmongEdges(remainingEdges, remainingPreviousNodes);
int i = 0;
foreach (int leaf in leaves)
{
List <int> remainingNodes = remainingPreviousNodes.Select(id => id).ToList();
remainingNodes.Remove(leaf);
createSubPossibleKStates(ksWithAllStates, remainingEdges, remainingNodes, someStateProblem, leaf, rnd, leavesCount, i, leaves.Count());
i++;
}
}
public async Task <CreateKnowledgeSpaceCommandResult> Handle(CreateKnowledgeSpaceCommand request, CancellationToken cancellationToken)
{
List <List <int> > edgePairs = removeTransitiveEdges(request.Edges.Select(e => new List <int> {
e.ProblemSourceId.Value, e.ProblemTargetId.Value
}).ToList());
List <Edge> cleanedEdges = edgePairs.Select(pair => new Edge()
{
ProblemSourceId = pair[0], ProblemTargetId = pair[1]
}).ToList();
KnowledgeSpace knowledgeSpace = new KnowledgeSpace
{
TestId = null,
Problems = request.Problems,
Edges = cleanedEdges,
ProfessorId = request.UserId,
Title = request.Title
};
var result = await _knowledgeSpaceRepository.CreateKnowledgeSpace(knowledgeSpace);
return(new CreateKnowledgeSpaceCommandResult
{
Id = result.KnowledgeSpaceId
});
}
public async void updateKnowledgeSpace(KnowledgeSpace knowledgeSpace)
{
_context.KnowledgeSpaces.Update(knowledgeSpace);
_context.SaveChanges();
}
public async Task <CreateRealKSCommandResult> Handle(CreateRealKSCommand request, CancellationToken cancellationToken)
{
KnowledgeSpace expectedKnowledgeSpace = await _knowledgeSpaceRepository.GetSingleKnowledgeSpaceByIdWidthIncludes(request.KnowledgeSpaceId);
List <string> problems = new List <string>();
List <Problem> sortedProblems = expectedKnowledgeSpace.Problems.ToList();
sortedProblems = sortedProblems.OrderBy(x => x.ProblemId).ToList();
foreach (Problem problem in sortedProblems)
{
problems.Add(problem.ProblemId.ToString());
}
KnowledgeSpace realKnowledgeSpace = new KnowledgeSpace
{
ProfessorId = expectedKnowledgeSpace.ProfessorId,
Title = "Real " + expectedKnowledgeSpace.Title,
IsReal = true,
ExpectedKnowledgeSpace = expectedKnowledgeSpace.KnowledgeSpaceId,
Problems = new List <Problem>(),
Edges = new List <Edge>()
};
var json = JsonConvert.SerializeObject(problems);
var content = new StringContent(json, Encoding.UTF8, "application/json");
KnowledgeSpace createdRealKS = await _knowledgeSpaceRepository.CreateKnowledgeSpace(realKnowledgeSpace);
HttpClient client = _httpClientFactory.CreateClient();
var result = await client.PostAsync("http://localhost:8000/kst/iita", content);
var a = await result.Content.ReadAsStringAsync();
dynamic rawEdgesArray = JsonConvert.DeserializeObject <dynamic>(a);
var edgePairs = JsonConvert.DeserializeObject <List <List <int> > >(rawEdgesArray);
edgePairs = removeTransitiveEdges(edgePairs);
var map = new Dictionary <int, int>();
var reverseMap = new Dictionary <int, int>();
var reverseMapForStates = new Dictionary <int, int>();
int i = 0;
List <int> problemIds = new List <int>();
foreach (Problem problem in sortedProblems)
{
Problem newProblem = new Problem();
newProblem.ProblemId = new int();
newProblem.KnowledgeSpaceId = createdRealKS.KnowledgeSpaceId;
newProblem.X = problem.X;
newProblem.Y = problem.Y;
newProblem.Title = problem.Title;
var savedProblem = await _knowledgeSpaceRepository.addProblem(newProblem);
reverseMap.Add(problem.ProblemId, i);
map.Add(i++, savedProblem.ProblemId);
reverseMapForStates.Add(savedProblem.ProblemId, i);
problemIds.Add(savedProblem.ProblemId);
}
List <List <int> > edgePairsMapped = new List <List <int> >();
int[,] levenshteinMatrixReal = new int[problemIds.Count(), problemIds.Count()];
int[,] levenshteinMatrixExpected = new int[problemIds.Count(), problemIds.Count()];
foreach (var pair in edgePairs)
{
Edge edge = new Edge();
edge.ProblemSourceId = map[pair[0]];
edge.ProblemTargetId = map[pair[1]];
edge.KnowledgeSpaceId = createdRealKS.KnowledgeSpaceId;
List <int> edgeMapped = new List <int>();
edgeMapped.Add(map[pair[0]]);
edgeMapped.Add(map[pair[1]]);
edgePairsMapped.Add(edgeMapped);
var ret = await _knowledgeSpaceRepository.addEdge(edge);
levenshteinMatrixReal[pair[0], pair[1]] = 1;
}
foreach (var edge in expectedKnowledgeSpace.Edges.ToList())
{
levenshteinMatrixExpected[reverseMap[edge.ProblemSourceId.Value], reverseMap[edge.ProblemTargetId.Value]] = 1;
}
KnowledgeSpace ksWithAllStates = await findAllPossibleKnowledgeStates(edgePairsMapped, problemIds, realKnowledgeSpace.KnowledgeSpaceId);
await determinePosibilitiesForAllStates(ksWithAllStates, realKnowledgeSpace.KnowledgeSpaceId, reverseMapForStates, client);
return(new CreateRealKSCommandResult
{
Id = createdRealKS.KnowledgeSpaceId,
levenshteinMatrixReal = levenshteinMatrixReal,
levenshteinMatrixExpected = levenshteinMatrixExpected
});
}
