/// <summary>
/// Determines if the team should be locked out for their most
/// recent incorrect submission and returns the expiry time for the
/// lockout.
/// </summary>
/// <param name="ev"></param>
/// <param name="submissions">
/// Expects submissions in chronological order
/// </param>
/// <param name="puzzleState"></param>
/// <returns>
/// If the team should be locked out, returns the time when a team
/// can enter submissions again.
/// Null if the team should not be locked out.
/// </returns>
private static DateTime?ComputeLockoutExpiryTime(
Event ev,
IList <Submission> submissions,
PuzzleStatePerTeam puzzleState)
{
int consecutiveWrongSubmissions = 0;
/**
* Count the number of submissions in the past N minutes where N is
* the LockoutIncorrectGuessPeriod set for the event. If that count
* exceeds the LockoutIncorrectGuessLimit set for the event, then
* the team should be locked out of that puzzle.
*/
DateTime incorrectGuessStartTime = DateTime.UtcNow.Subtract(TimeSpan.FromMinutes(ev.LockoutIncorrectGuessPeriod));
foreach (Submission s in submissions)
{
// if the guess is before the incorrect window, ignore it
if (s.TimeSubmitted < incorrectGuessStartTime)
{
continue;
}
if (s.Response == null)
{
++consecutiveWrongSubmissions;
}
else
{
// Do not increment on partials, decrement instead! This is a tweak to improve the lockout story for DC puzzles.
// But don't overdecrement, lest we let people build a gigantic bank of free guesses.
consecutiveWrongSubmissions = Math.Max(0, consecutiveWrongSubmissions - 1);
}
}
if (consecutiveWrongSubmissions <= ev.LockoutIncorrectGuessLimit)
{
return(null);
}
/**
* The lockout duration is determined by the difference between the
* count of wrong submissions in the lockout period and the lockout
* limit. That difference is multiplied by the event's
* LockoutDurationMultiplier to determine the lockout time in
* minutes.
*/
return(DateTime.UtcNow.AddMinutes(
(consecutiveWrongSubmissions -
ev.LockoutIncorrectGuessLimit) *
ev.LockoutDurationMultiplier));
}
/// <summary>
/// Create missing PuzzleStatePerTeam rows from when they were lazily created
/// </summary>
public async Task <IActionResult> OnPostCreateMissingPSPTAsync()
{
List <int> allEvents = await(from ev in _context.Events
select ev.ID).ToListAsync();
var allPspts = await(from pspt in _context.PuzzleStatePerTeam
select new { pspt.PuzzleID, pspt.TeamID }).ToDictionaryAsync(pspt => (((ulong)pspt.PuzzleID) << 32) | (uint)pspt.TeamID);
List <PuzzleStatePerTeam> newPspts = new List <PuzzleStatePerTeam>();
foreach (int ev in allEvents)
{
List <int> allPuzzles = await(from puzzle in _context.Puzzles
where puzzle.EventID == ev
select puzzle.ID).ToListAsync();
List <int> allTeams = await(from team in _context.Teams
where team.EventID == ev
select team.ID).ToListAsync();
foreach (int puzzle in allPuzzles)
{
foreach (int team in allTeams)
{
ulong key = (((ulong)puzzle) << 32) | (uint)team;
if (!allPspts.ContainsKey(key))
{
PuzzleStatePerTeam newPspt = new PuzzleStatePerTeam()
{
PuzzleID = puzzle,
TeamID = team,
};
newPspts.Add(newPspt);
}
}
}
}
if (newPspts.Count > 0)
{
_context.PuzzleStatePerTeam.AddRange(newPspts.ToArray());
await _context.SaveChangesAsync();
Status = $"Added {newPspts.Count} missing PuzzleStatePerTeam rows";
}
else
{
Status = "No new PuzzleStatePerTeam rows needed";
}
return(Page());
}
/// <summary>
/// Determines if the team should be locked out for their most
/// recent incorrect submission and returns the expiry time for the
/// lockout.
/// </summary>
/// <param name="ev"></param>
/// <param name="submissions">
/// Expects submissions in chronological order
/// </param>
/// <param name="puzzleState"></param>
/// <returns>
/// If the team should be locked out, returns the time when a team
/// can enter submissions again.
/// Null if the team should not be locked out.
/// </returns>
private static DateTime?ComputeLockoutExpiryTime(
Event ev,
IList <Submission> submissions,
PuzzleStatePerTeam puzzleState)
{
int consecutiveWrongSubmissions = 0;
/**
* Count the number of submissions in the past N minutes where N is
* the LockoutIncorrectGuessPeriod set for the event. If that count
* exceeds the LockoutIncorrectGuessLimit set for the event, then
* the team should be locked out of that puzzle.
*/
foreach (Submission s in submissions.Reverse())
{
// Do not increment on partials
if (s.Response != null)
{
continue;
}
if (s.TimeSubmitted.AddMinutes(ev.LockoutIncorrectGuessPeriod)
.CompareTo(DateTime.UtcNow) < 0)
{
break;
}
++consecutiveWrongSubmissions;
}
if (consecutiveWrongSubmissions <= ev.LockoutIncorrectGuessLimit)
{
return(null);
}
/**
* The lockout duration is determined by the difference between the
* count of wrong submissions in the lockout period and the lockout
* limit. That difference is multiplied by the event's
* LockoutDurationMultiplier to determine the lockout time in
* minutes.
*/
return(DateTime.UtcNow.AddMinutes(
(consecutiveWrongSubmissions -
ev.LockoutIncorrectGuessLimit) *
ev.LockoutDurationMultiplier));
}
public async Task <IActionResult> OnGet(int puzzleId)
{
PrereqPuzzleId = puzzleId;
Puzzle puzzle = await(from puzz in _context.Puzzles
where puzz.ID == puzzleId
select puzz).FirstOrDefaultAsync();
if (puzzle == null)
{
return(NotFound());
}
// Restrict this page to whistle stop non-puzzles
if (puzzle.MinutesOfEventLockout == 0 || puzzle.IsPuzzle)
{
return(NotFound());
}
Team team = await UserEventHelper.GetTeamForPlayer(_context, Event, LoggedInUser);
var puzzleStateQuery = PuzzleStateHelper.GetFullReadOnlyQuery(_context, Event, null, team);
PuzzleStatePerTeam state = await(from pspt in puzzleStateQuery
where pspt.PuzzleID == puzzle.ID
select pspt).FirstOrDefaultAsync();
if (state == null)
{
return(NotFound());
}
// Only move forward if the puzzle is open and unsolved
if (state.UnlockedTime == null || state.SolvedTime != null)
{
return(NotFound());
}
CurrentPuzzle = puzzle;
// Treat all locked puzzles where this is a prerequisite as puzzles that can be unlocked
PuzzleOptions = await(from pspt in puzzleStateQuery
join prereq in _context.Prerequisites on pspt.PuzzleID equals prereq.PuzzleID
where prereq.PrerequisiteID == puzzle.ID &&
pspt.SolvedTime == null && pspt.UnlockedTime == null
select prereq.Puzzle).ToListAsync();
return(Page());
}
private static bool IsPuzzleSubmissionLimitReached(
Event ev,
IList <Submission> submissions,
PuzzleStatePerTeam puzzleState)
{
uint wrongSubmissions = 0;
foreach (Submission s in submissions)
{
if (s.Response == null)
{
wrongSubmissions++;
}
}
if (wrongSubmissions < puzzleState.WrongSubmissionCountBuffer)
{
return(false);
}
return(wrongSubmissions - puzzleState.WrongSubmissionCountBuffer >=
ev.MaxSubmissionCount);
}
public async Task <IActionResult> OnPostUnlock(int puzzleId, int unlockId)
{
Puzzle puzzle = await(from puzz in _context.Puzzles
where puzz.ID == puzzleId
select puzz).FirstOrDefaultAsync();
if (puzzle == null)
{
return(NotFound());
}
// Restrict this page to whistle stop non-puzzles
if (puzzle.MinutesOfEventLockout == 0 || puzzle.IsPuzzle)
{
return(NotFound());
}
Team team = await UserEventHelper.GetTeamForPlayer(_context, Event, LoggedInUser);
using (var transaction = _context.Database.BeginTransaction())
{
var puzzleStateQuery = PuzzleStateHelper.GetFullReadOnlyQuery(_context, Event, null, team);
PuzzleStatePerTeam prereqState = await(from pspt in puzzleStateQuery
where pspt.PuzzleID == puzzle.ID
select pspt).FirstOrDefaultAsync();
if (prereqState == null)
{
return(NotFound());
}
// Only move forward if the prereq is open and unsolved
if (prereqState.UnlockedTime == null || prereqState.SolvedTime != null)
{
return(NotFound("Your team has already chosen and can't choose again"));
}
PuzzleStatePerTeam unlockState = await(from pspt in puzzleStateQuery
where pspt.PuzzleID == unlockId
select pspt).FirstOrDefaultAsync();
if (unlockState == null)
{
return(NotFound());
}
// The chosen puzzle must be locked (and unsolved)
if (unlockState.UnlockedTime != null || unlockState.SolvedTime != null)
{
return(NotFound("You've already chosen this puzzle"));
}
// Ensure the puzzle is actually one of the unlock options
Prerequisites prereq = await(from pre in _context.Prerequisites
where pre.PrerequisiteID == puzzleId && pre.PuzzleID == unlockId
select pre).FirstOrDefaultAsync();
if (prereq == null)
{
return(NotFound());
}
await PuzzleStateHelper.SetSolveStateAsync(_context, Event, puzzle, team, DateTime.UtcNow);
await PuzzleStateHelper.SetUnlockStateAsync(_context, Event, unlockState.Puzzle, team, DateTime.UtcNow);
transaction.Commit();
}
Puzzle puzzleToUnlock = await(from p in _context.Puzzles
where p.ID == unlockId
select p).FirstOrDefaultAsync();
string puzzleUrl;
if (puzzleToUnlock.CustomURL != null)
{
puzzleUrl = PuzzleHelper.GetFormattedUrl(puzzleToUnlock, Event.ID);
}
else
{
puzzleUrl = puzzleToUnlock.PuzzleFile.UrlString;
}
return(Redirect(puzzleUrl));
}
public PuzzleWithState(Puzzle puzzle, PuzzleStatePerTeam state)
{
this.Puzzle = puzzle;
this.State = state;
}
/// <summary>
/// Get a writable query of puzzle state. In the course of constructing the query, it will instantiate any state records that are missing on the server.
/// </summary>
/// <param name="context">The puzzle DB context</param>
/// <param name="eventObj">The event we are querying from</param>
/// <param name="puzzle">The puzzle; if null, get all puzzles in the event.</param>
/// <param name="team">The team; if null, get all the teams in the event.</param>
/// <returns>A query of PuzzleStatePerTeam objects that can be sorted and instantiated, but you can't edit the results.</returns>
public static async Task <IQueryable <PuzzleStatePerTeam> > GetFullReadWriteQueryAsync(PuzzleServerContext context, Event eventObj, Puzzle puzzle, Team team)
{
if (context == null)
{
throw new ArgumentNullException("Context required.");
}
if (eventObj == null)
{
throw new ArgumentNullException("Event required.");
}
if (puzzle != null && team != null)
{
PuzzleStatePerTeam state = await context.PuzzleStatePerTeam.Where(s => s.Puzzle == puzzle && s.Team == team).FirstOrDefaultAsync();
if (state == null)
{
context.PuzzleStatePerTeam.Add(new DataModel.PuzzleStatePerTeam()
{
Puzzle = puzzle, Team = team
});
}
}
else if (puzzle != null)
{
var teamIdsQ = context.Teams.Where(p => p.Event == eventObj).Select(p => p.ID);
var puzzleStateTeamIdsQ = context.PuzzleStatePerTeam.Where(s => s.Puzzle == puzzle).Select(s => s.TeamID);
var teamIdsWithoutState = await teamIdsQ.Except(puzzleStateTeamIdsQ).ToListAsync();
if (teamIdsWithoutState.Count > 0)
{
for (int i = 0; i < teamIdsWithoutState.Count; i++)
{
context.PuzzleStatePerTeam.Add(new DataModel.PuzzleStatePerTeam()
{
Puzzle = puzzle, TeamID = teamIdsWithoutState[i]
});
}
}
}
else if (team != null)
{
var puzzleIdsQ = context.Puzzles.Where(p => p.Event == eventObj).Select(p => p.ID);
var puzzleStatePuzzleIdsQ = context.PuzzleStatePerTeam.Where(s => s.Team == team).Select(s => s.PuzzleID);
var puzzleIdsWithoutState = await puzzleIdsQ.Except(puzzleStatePuzzleIdsQ).ToListAsync();
if (puzzleIdsWithoutState.Count > 0)
{
for (int i = 0; i < puzzleIdsWithoutState.Count; i++)
{
context.PuzzleStatePerTeam.Add(new DataModel.PuzzleStatePerTeam()
{
Team = team, PuzzleID = puzzleIdsWithoutState[i]
});
}
}
}
else if (puzzle == null && team == null)
{
throw new NotImplementedException("Full event query is NYI and may never be needed");
}
await context.SaveChangesAsync(); // query below will not return these unless we save
// now this query is no longer sparse because we just filled it all out!
return(GetSparseQuery(context, eventObj, puzzle, team));
}
/// <summary>
/// Unlock any puzzles that need to be unlocked due to the recent solve of a prerequisite.
/// </summary>
/// <param name="context">The puzzle DB context</param>
/// <param name="eventObj">The event we are working in</param>
/// <param name="puzzleJustSolved">The puzzle just solved; if null, all the puzzles in the event (which will make more sense once we add per author filtering)</param>
/// <param name="team">The team that just solved; if null, all the teams in the event.</param>
/// <param name="unlockTime">The time that the puzzle should be marked as unlocked.</param>
/// <returns></returns>
private static async Task UnlockAnyPuzzlesThatThisSolveUnlockedAsync(PuzzleServerContext context, Event eventObj, Puzzle puzzleJustSolved, Team team, DateTime unlockTime)
{
// a simple query for all puzzle IDs in the event - will be used at least once below
IQueryable <int> allPuzzleIDsQ = context.Puzzles.Where(p => p.Event == eventObj).Select(p => p.ID);
// if we solved a group of puzzles, every puzzle needs an update.
// if we solved a single puzzle, only update the puzzles that have that one as a prerequisite.
IQueryable <int> needsUpdatePuzzleIDsQ =
puzzleJustSolved == null ?
allPuzzleIDsQ :
context.Prerequisites.Where(pre => pre.Prerequisite == puzzleJustSolved).Select(pre => pre.PuzzleID).Distinct();
// get the prerequisites for all puzzles that need an update
// information we get per puzzle: { id, min count, prerequisite IDs }
var prerequisiteDataForNeedsUpdatePuzzles = await context.Prerequisites
.Where(pre => needsUpdatePuzzleIDsQ.Contains(pre.PuzzleID))
.GroupBy(pre => pre.Puzzle)
.Select(g => new {
PuzzleID = g.Key.ID,
g.Key.MinPrerequisiteCount,
PrerequisiteIDs = g.Select(pre => pre.PrerequisiteID)
})
.ToListAsync();
// Are we updating one team or all teams?
List <Team> teamsToUpdate = team == null ? await context.Teams.Where(t => t.Event == eventObj).ToListAsync() : new List <Team>()
{
team
};
// Update teams one at a time
foreach (Team t in teamsToUpdate)
{
// Collect the IDs of all solved/unlocked puzzles for this team
// sparse lookup is fine since if the state is missing it isn't unlocked or solved!
var puzzleStateForTeamT = await PuzzleStateHelper.GetSparseQuery(context, eventObj, null, t)
.Select(state => new { state.PuzzleID, state.UnlockedTime, state.SolvedTime })
.ToListAsync();
// Make a hash set out of them for easy lookup in case we have several prerequisites to chase
HashSet <int> unlockedPuzzleIDsForTeamT = new HashSet <int>();
HashSet <int> solvedPuzzleIDsForTeamT = new HashSet <int>();
foreach (var puzzleState in puzzleStateForTeamT)
{
if (puzzleState.UnlockedTime != null)
{
unlockedPuzzleIDsForTeamT.Add(puzzleState.PuzzleID);
}
if (puzzleState.SolvedTime != null)
{
solvedPuzzleIDsForTeamT.Add(puzzleState.PuzzleID);
}
}
// now loop through all puzzles and count up who needs to be unlocked
foreach (var puzzleToUpdate in prerequisiteDataForNeedsUpdatePuzzles)
{
// already unlocked? skip
if (unlockedPuzzleIDsForTeamT.Contains(puzzleToUpdate.PuzzleID))
{
continue;
}
// Enough puzzles unlocked by count? Let's unlock it
if (puzzleToUpdate.PrerequisiteIDs.Where(id => solvedPuzzleIDsForTeamT.Contains(id)).Count() >= puzzleToUpdate.MinPrerequisiteCount)
{
PuzzleStatePerTeam state = await context.PuzzleStatePerTeam.Where(s => s.PuzzleID == puzzleToUpdate.PuzzleID && s.Team == t).FirstOrDefaultAsync();
if (state == null)
{
context.PuzzleStatePerTeam.Add(new DataModel.PuzzleStatePerTeam()
{
PuzzleID = puzzleToUpdate.PuzzleID, Team = t, UnlockedTime = unlockTime
});
}
else
{
state.UnlockedTime = unlockTime;
}
}
}
}
// after looping through all teams, send one update with all changes made
await context.SaveChangesAsync();
}
public async Task <IActionResult> OnPostImportAsync()
{
// the BindProperty only binds the event ID, let's get the rest
if (await _context.Events.Where((e) => e.ID == ImportEventID).FirstOrDefaultAsync() == null)
{
return(NotFound());
}
// verify that we're an admin of the import event. current event administratorship is already validated.
if (!await _context.EventAdmins.Where(ea => ea.Event.ID == ImportEventID && ea.Admin == LoggedInUser).AnyAsync())
{
return(Forbid());
}
var sourceEventAuthors = await _context.EventAuthors.Where((a) => a.Event.ID == ImportEventID).ToListAsync();
var sourcePuzzles = await _context.Puzzles.Where((p) => p.Event.ID == ImportEventID).ToListAsync();
// TODO: replace this with a checkbox and sufficient danger warnings about duplicate titles
bool deletePuzzleIfPresent = true;
using (var transaction = _context.Database.BeginTransaction(System.Data.IsolationLevel.Serializable))
{
// Step 1: Make sure all authors exist
foreach (var sourceEventAuthor in sourceEventAuthors)
{
var destEventAuthor = await _context.EventAuthors.Where((e) => e.Event == Event && e.Author == sourceEventAuthor.Author).FirstOrDefaultAsync();
if (destEventAuthor == null)
{
destEventAuthor = new EventAuthors(sourceEventAuthor);
destEventAuthor.Event = Event;
_context.EventAuthors.Add(destEventAuthor);
}
}
// Step 2: Make sure all puzzles exist
Dictionary <int, Puzzle> puzzleCloneMap = new Dictionary <int, Puzzle>();
foreach (var sourcePuzzle in sourcePuzzles)
{
// delete the puzzle if it exists
if (deletePuzzleIfPresent)
{
foreach (Puzzle p in _context.Puzzles.Where((p) => p.Event == Event && p.Name == sourcePuzzle.Name))
{
await PuzzleHelper.DeletePuzzleAsync(_context, p);
}
}
var destPuzzle = new Puzzle(sourcePuzzle);
destPuzzle.Event = Event;
puzzleCloneMap[sourcePuzzle.ID] = destPuzzle;
_context.Puzzles.Add(destPuzzle);
}
// Step 3: Save so that all our new objects have valid IDs
await _context.SaveChangesAsync();
// Step 4: Ancillary tables referring to puzzles
foreach (var sourcePuzzle in sourcePuzzles)
{
// PuzzleAuthors
foreach (PuzzleAuthors sourcePuzzleAuthor in _context.PuzzleAuthors.Where((p) => p.Puzzle == sourcePuzzle))
{
var destPuzzleAuthor = new PuzzleAuthors(sourcePuzzleAuthor);
destPuzzleAuthor.Puzzle = puzzleCloneMap[sourcePuzzleAuthor.Puzzle.ID];
_context.PuzzleAuthors.Add(destPuzzleAuthor);
}
// Responses
foreach (Response sourceResponse in _context.Responses.Where((r) => r.Puzzle == sourcePuzzle))
{
var destResponse = new Response(sourceResponse);
destResponse.Puzzle = puzzleCloneMap[sourceResponse.Puzzle.ID];
_context.Responses.Add(destResponse);
}
// Prerequisites
foreach (Prerequisites sourcePrerequisite in _context.Prerequisites.Where((r) => r.Puzzle == sourcePuzzle))
{
var destPrerequisite = new Prerequisites(sourcePrerequisite);
destPrerequisite.Puzzle = puzzleCloneMap[sourcePrerequisite.Puzzle.ID];
destPrerequisite.Prerequisite = puzzleCloneMap[sourcePrerequisite.Prerequisite.ID];
_context.Prerequisites.Add(destPrerequisite);
}
// Hints
foreach (Hint sourceHint in _context.Hints.Where((h) => h.Puzzle == sourcePuzzle))
{
var destHint = new Hint(sourceHint);
destHint.Puzzle = puzzleCloneMap[sourceHint.Puzzle.ID];
_context.Hints.Add(destHint);
foreach (Team team in _context.Teams.Where(t => t.Event == Event))
{
_context.HintStatePerTeam.Add(new HintStatePerTeam()
{
Hint = destHint, TeamID = team.ID
});
}
}
// PuzzleStatePerTeam
foreach (Team team in _context.Teams.Where(t => t.Event == Event))
{
int newPuzzleId = puzzleCloneMap[sourcePuzzle.ID].ID;
bool hasPuzzleStatePerTeam = await(from pspt in _context.PuzzleStatePerTeam
where pspt.PuzzleID == newPuzzleId &&
pspt.TeamID == team.ID
select pspt).AnyAsync();
if (!hasPuzzleStatePerTeam)
{
PuzzleStatePerTeam newPspt = new PuzzleStatePerTeam()
{
TeamID = team.ID, PuzzleID = newPuzzleId
};
_context.PuzzleStatePerTeam.Add(newPspt);
}
}
// ContentFiles
foreach (ContentFile contentFile in _context.ContentFiles.Where((c) => c.Puzzle == sourcePuzzle))
{
ContentFile newFile = new ContentFile(contentFile);
newFile.Event = Event;
newFile.Puzzle = puzzleCloneMap[contentFile.Puzzle.ID];
newFile.Url = await FileManager.CloneBlobAsync(contentFile.ShortName, Event.ID, contentFile.Url);
_context.ContentFiles.Add(newFile);
}
// Pieces
foreach (Piece piece in _context.Pieces.Where((p) => p.Puzzle == sourcePuzzle))
{
Piece newPiece = new Piece(piece);
newPiece.Puzzle = puzzleCloneMap[piece.PuzzleID];
newPiece.PuzzleID = puzzleCloneMap[piece.PuzzleID].ID; // unsure why I need this line for pieces but not others <shrug/>
_context.Pieces.Add(newPiece);
}
}
// Step 5: Final save and commit
await _context.SaveChangesAsync();
transaction.Commit();
}
return(RedirectToPage("./Details"));
}
/// <summary>
/// Unlock any puzzles that need to be unlocked due to the recent solve of a prerequisite.
/// </summary>
/// <param name="context">The puzzle DB context</param>
/// <param name="eventObj">The event we are working in</param>
/// <param name="puzzleJustSolved">The puzzle just solved</param>
/// <param name="team">The team that just solved; if null, all the teams in the event.</param>
/// <param name="unlockTime">The time that the puzzle should be marked as unlocked.</param>
/// <returns></returns>
private static async Task UnlockAnyPuzzlesThatThisSolveUnlockedAsync(PuzzleServerContext context, Event eventObj, Puzzle puzzleJustSolved, Team team, DateTime unlockTime)
{
// a simple query for all puzzle IDs in the event - will be used at least once below
IQueryable <int> allPuzzleIDsQ = context.Puzzles.Where(p => p.Event == eventObj).Select(p => p.ID);
// get the prerequisites for all puzzles that need an update
// information we get per puzzle: { id, min count, number of solved prereqs including this one }
var prerequisiteDataForNeedsUpdatePuzzles = (from possibleUnlock in context.Prerequisites
join unlockedBy in context.Prerequisites on possibleUnlock.PuzzleID equals unlockedBy.PuzzleID
join pspt in context.PuzzleStatePerTeam on unlockedBy.PrerequisiteID equals pspt.PuzzleID
join puz in context.Puzzles on unlockedBy.PrerequisiteID equals puz.ID
where possibleUnlock.Prerequisite == puzzleJustSolved && (team == null || pspt.TeamID == team.ID) && pspt.SolvedTime != null
group puz by new { unlockedBy.PuzzleID, unlockedBy.Puzzle.MinPrerequisiteCount, pspt.TeamID } into g
select new
{
PuzzleID = g.Key.PuzzleID,
TeamID = g.Key.TeamID,
g.Key.MinPrerequisiteCount,
TotalPrerequisiteCount = g.Sum(p => (p.PrerequisiteWeight ?? 1))
}).ToList();
// Are we updating one team or all teams?
List <Team> teamsToUpdate = team == null ? await context.Teams.Where(t => t.Event == eventObj).ToListAsync() : new List <Team>()
{
team
};
// Update teams one at a time
foreach (Team t in teamsToUpdate)
{
// Collect the IDs of all solved/unlocked puzzles for this team
// sparse lookup is fine since if the state is missing it isn't unlocked or solved!
var puzzleStateForTeamT = await PuzzleStateHelper.GetSparseQuery(context, eventObj, null, t)
.Select(state => new { state.PuzzleID, state.UnlockedTime, state.SolvedTime })
.ToListAsync();
// Make a hash set out of them for easy lookup in case we have several prerequisites to chase
HashSet <int> unlockedPuzzleIDsForTeamT = new HashSet <int>();
HashSet <int> solvedPuzzleIDsForTeamT = new HashSet <int>();
foreach (var puzzleState in puzzleStateForTeamT)
{
if (puzzleState.UnlockedTime != null)
{
unlockedPuzzleIDsForTeamT.Add(puzzleState.PuzzleID);
}
if (puzzleState.SolvedTime != null)
{
solvedPuzzleIDsForTeamT.Add(puzzleState.PuzzleID);
}
}
// now loop through all puzzles and count up who needs to be unlocked
foreach (var puzzleToUpdate in prerequisiteDataForNeedsUpdatePuzzles)
{
// already unlocked? skip
if (unlockedPuzzleIDsForTeamT.Contains(puzzleToUpdate.PuzzleID))
{
continue;
}
// Enough puzzles unlocked by count? Let's unlock it
if (puzzleToUpdate.TeamID == t.ID && puzzleToUpdate.TotalPrerequisiteCount >= puzzleToUpdate.MinPrerequisiteCount)
{
PuzzleStatePerTeam state = await context.PuzzleStatePerTeam.Where(s => s.PuzzleID == puzzleToUpdate.PuzzleID && s.Team == t).FirstAsync();
state.UnlockedTime = unlockTime;
}
}
}
// after looping through all teams, send one update with all changes made
await context.SaveChangesAsync();
}
/// <summary>
/// Evaulates player submissions then either saves them to the database or returns an error to the caller
/// </summary>
public static async Task <SubmissionResponse> EvaluateSubmission(PuzzleServerContext context, PuzzleUser loggedInUser, Event thisEvent, int puzzleId, string submissionText, bool allowFreeformSharing)
{
//Query data needed to process submission
Team team = await UserEventHelper.GetTeamForPlayer(context, thisEvent, loggedInUser);
Puzzle puzzle = await context.Puzzles.Where(
(p) => p.ID == puzzleId).FirstOrDefaultAsync();
PuzzleStatePerTeam puzzleState = await(PuzzleStateHelper
.GetFullReadOnlyQuery(
context,
thisEvent,
puzzle,
team))
.FirstAsync();
List <Puzzle> puzzlesCausingGlobalLockout = await PuzzleStateHelper.PuzzlesCausingGlobalLockout(context, thisEvent, team).ToListAsync();
// Return early for cases when there's obviously nothing we can do with the submission
// The submission text is empty
if (String.IsNullOrWhiteSpace(submissionText))
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.EmptySubmission
});
}
// The puzzle is locked
if (puzzle == null || puzzleState.UnlockedTime == null)
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.PuzzleLocked
});
}
// The user or team isn't known
if (loggedInUser == null || team == null)
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.Unauthorized
});
}
// The event hasn't started yet
if (DateTime.UtcNow < thisEvent.EventBegin)
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.Unauthorized
});
}
// The team is locked out
if (puzzleState.IsTeamLockedOut || puzzleState.IsEmailOnlyMode)
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.TeamLockedOut
});
}
// The puzzle has already been solved
if (puzzleState.SolvedTime != null)
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.AlreadySolved
});
}
// The team is under a global lockout
if (puzzlesCausingGlobalLockout.Count != 0 && !puzzlesCausingGlobalLockout.Contains(puzzle))
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.TeamLockedOut
});
}
List <SubmissionView> submissionViews = await(from sub in context.Submissions
join user in context.PuzzleUsers on sub.Submitter equals user
join r in context.Responses on sub.Response equals r into responses
from response in responses.DefaultIfEmpty()
where sub.Team == team &&
sub.Puzzle == puzzle
orderby sub.TimeSubmitted
select new SubmissionView()
{
Submission = sub,
Response = response,
SubmitterName = user.Name,
FreeformReponse = sub.FreeformResponse,
IsFreeform = puzzle.IsFreeform
}).ToListAsync();
List <Submission> submissions = new List <Submission>(submissionViews.Count);
foreach (SubmissionView submissionView in submissionViews)
{
submissions.Add(submissionView.Submission);
}
// The submission is a duplicate
bool duplicateSubmission = (from sub in submissions
where sub.SubmissionText == Response.FormatSubmission(submissionText)
select sub).Any();
if (duplicateSubmission)
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.DuplicateSubmission
});
}
// Create submission and add it to list
Submission submission = new Submission
{
TimeSubmitted = DateTime.UtcNow,
Puzzle = puzzleState.Puzzle,
Team = puzzleState.Team,
Submitter = loggedInUser,
AllowFreeformSharing = allowFreeformSharing
};
string submissionTextToCheck = Response.FormatSubmission(submissionText);
if (puzzle.IsFreeform)
{
submission.UnformattedSubmissionText = submissionText;
}
else
{
submission.SubmissionText = submissionText;
}
submission.Response = await context.Responses.Where(
r => r.Puzzle.ID == puzzleId &&
submissionTextToCheck == r.SubmittedText)
.FirstOrDefaultAsync();
submissions.Add(submission);
// Update puzzle state if submission was correct
if (submission.Response != null && submission.Response.IsSolution)
{
await PuzzleStateHelper.SetSolveStateAsync(context,
thisEvent,
submission.Puzzle,
submission.Team,
submission.TimeSubmitted);
}
else if (!puzzle.IsFreeform && submission.Response == null && thisEvent.IsAnswerSubmissionActive)
{
// We also determine if the puzzle should be set to email-only mode.
if (IsPuzzleSubmissionLimitReached(
thisEvent,
submissions,
puzzleState))
{
await PuzzleStateHelper.SetEmailOnlyModeAsync(context,
thisEvent,
submission.Puzzle,
submission.Team,
true);
var authors = await context.PuzzleAuthors.Where((pa) => pa.Puzzle == submission.Puzzle).Select((pa) => pa.Author.Email).ToListAsync();
MailHelper.Singleton.SendPlaintextBcc(authors,
$"{thisEvent.Name}: Team {submission.Team.Name} is in email mode for {submission.Puzzle.Name}",
"");
}
else
{
// If the submission was incorrect and not a partial solution,
// we will do the lockout computations now.
DateTime?lockoutExpiryTime = ComputeLockoutExpiryTime(
thisEvent,
submissions,
puzzleState);
if (lockoutExpiryTime != null)
{
await PuzzleStateHelper.SetLockoutExpiryTimeAsync(context,
thisEvent,
submission.Puzzle,
submission.Team,
lockoutExpiryTime);
}
}
}
context.Submissions.Add(submission);
await context.SaveChangesAsync();
// Send back responses for cases where the database has been updated
// Correct response
if (submission.Response != null && submission.Response.IsSolution)
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.Correct, CompleteResponse = submission.Response
});
}
// Freeform response
if (puzzle.IsFreeform)
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.Freeform, FreeformResponse = submission.FreeformResponse
});
}
// Partial response
if (submission.Response != null && !submission.Response.IsSolution)
{
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.Partial, CompleteResponse = submission.Response
});
}
// Default to incorrect
return(new SubmissionResponse()
{
ResponseCode = SubmissionResponseCode.Incorrect
});
}
/// <summary>
/// Returns whether the user is authorized to view the file
/// </summary>
/// <param name="eventId">The current event</param>
/// <param name="puzzle">The puzzle the file belongs to</param>
/// <param name="content">The file</param>
private async Task <bool> IsAuthorized(int eventId, Puzzle puzzle, ContentFile content)
{
Event currentEvent = await(from ev in context.Events
where ev.ID == eventId
select ev).SingleAsync();
PuzzleUser user = await PuzzleUser.GetPuzzleUserForCurrentUser(context, User, userManager);
// Admins can see all files
if (await user.IsAdminForEvent(context, currentEvent))
{
return(true);
}
// Authors can see all files attached to their puzzles
if (await UserEventHelper.IsAuthorOfPuzzle(context, puzzle, user))
{
return(true);
}
Team team = await UserEventHelper.GetTeamForPlayer(context, currentEvent, user);
if (team == null)
{
return(false);
}
// Once answers are available, so are all other files
if (currentEvent.AreAnswersAvailableNow)
{
return(true);
}
PuzzleStatePerTeam puzzleState = await PuzzleStateHelper.GetFullReadOnlyQuery(context, currentEvent, puzzle, team).SingleAsync();
switch (content.FileType)
{
case ContentFileType.Answer:
// The positive case is already handled above by checking AreAnswersAvailableNow
return(false);
case ContentFileType.Puzzle:
case ContentFileType.PuzzleMaterial:
if (puzzleState.UnlockedTime != null)
{
return(true);
}
else
{
return(false);
}
case ContentFileType.SolveToken:
if (puzzleState.SolvedTime != null)
{
return(true);
}
else
{
return(false);
}
default:
throw new NotImplementedException();
}
}
