public ProblemCheckView()
        {
            InitializeComponent();

            var appStyle = ThemeManager.DetectAppStyle(Application.Current);

            if (((AppTheme)appStyle.Item1).Name.Equals("BaseDark"))
            {
                textColor          = "White";
                secondaryTextColor = "LightBlue";
            }

            _gameDirectory = new DirectoryInfo(Properties.Settings.Default.FFXIV_Directory);

            _problemChecker = new ProblemChecker(_gameDirectory);

            RunChecks();
        }
        private async void Menu_Backup_Click(object sender, RoutedEventArgs e)
        {
            var result = FlexibleMessageBox.Show(UIMessages.CreateBackupsMessage, UIMessages.CreateBackupsTitle, MessageBoxButtons.YesNo, MessageBoxIcon.Information);

            if (result == System.Windows.Forms.DialogResult.Yes)
            {
                var gameDirectory    = new DirectoryInfo(Settings.Default.FFXIV_Directory);
                var problemChecker   = new ProblemChecker(gameDirectory);
                var backupsDirectory = new DirectoryInfo(Properties.Settings.Default.Backup_Directory);
                try
                {
                    await problemChecker.BackupIndexFiles(backupsDirectory);
                }
                catch (Exception ex)
                {
                    FlexibleMessageBox.Show(string.Format(UIMessages.BackupFailedErrorMessage, ex.Message), UIMessages.BackupFailedTitle, MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }

                await this.ShowMessageAsync(UIMessages.BackupCompleteTitle, UIMessages.BackupCompleteMessage);
            }
        }
Пример #3
0
        private async Task <bool> CheckIndexFiles()
        {
            var xivDataFiles   = new XivDataFile[] { XivDataFile._0A_Exd, XivDataFile._01_Bgcommon, XivDataFile._04_Chara, XivDataFile._06_Ui };
            var problemChecker = new ProblemChecker(_gameDirectory);

            try
            {
                foreach (var xivDataFile in xivDataFiles)
                {
                    var errorFound = await problemChecker.CheckIndexDatCounts(xivDataFile);

                    if (errorFound)
                    {
                        await problemChecker.RepairIndexDatCounts(xivDataFile);
                    }
                }
            }
            catch (Exception ex)
            {
                var result = FlexibleMessageBox.Show("A critical error occurred when attempting to read the FFXIV index files.\n\nWould you like to restore your index backups?\n\nError: " + ex.Message, "Critical Index Error", MessageBoxButtons.YesNo, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1);
                if (result == DialogResult.Yes)
                {
                    var indexBackupsDirectory = new DirectoryInfo(Settings.Default.Backup_Directory);
                    var success = await problemChecker.RestoreBackups(indexBackupsDirectory);

                    if (!success)
                    {
                        FlexibleMessageBox.Show("Unable to restore Index Backups, shutting down TexTools.", "Critical Error Shutdown", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1);
                        return(false);
                    }
                }
                else
                {
                    FlexibleMessageBox.Show("Shutting Down TexTools.", "Critical Error Shutdown", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1);
                    return(false);
                }
            }
            return(true);
        }
        /// <summary>
        /// Event handler for the start over menu item clicked
        /// </summary>
        private async void Menu_StartOver_Click(object sender, RoutedEventArgs e)
        {
            var gameDirectory = new DirectoryInfo(Settings.Default.FFXIV_Directory);

            var index = new Index(gameDirectory);

            if (index.IsIndexLocked(XivDataFile._0A_Exd))
            {
                FlexibleMessageBox.Show(UIMessages.IndexLockedErrorMessage, UIMessages.IndexLockedErrorTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);

                return;
            }

            var result = FlexibleMessageBox.Show(UIMessages.StartOverMessage, UIMessages.StartOverTitle, MessageBoxButtons.YesNo, MessageBoxIcon.Information);

            if (result == System.Windows.Forms.DialogResult.Yes)
            {
                var indexBackupsDirectory = new DirectoryInfo(Settings.Default.Backup_Directory);

                if (!Directory.Exists(indexBackupsDirectory.FullName))
                {
                    FlexibleMessageBox.Show(UIMessages.BackupFolderAccessErrorMessage,
                                            UIMessages.IndexBackupsErrorTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }

                var problemChecker = new ProblemChecker(gameDirectory);

                var progressController = await this.ShowProgressAsync(UIStrings.Start_Over, UIMessages.PleaseStandByMessage);

                progressController.SetIndeterminate();

                IProgress <string> progress = new Progress <string>((update) =>
                {
                    progressController.SetMessage(update);
                });

                try
                {
                    await problemChecker.PerformStartOver(indexBackupsDirectory, progress, XivLanguages.GetXivLanguage(Settings.Default.Application_Language));
                }
                catch
                {
                    FlexibleMessageBox.Show(UIMessages.StartOverErrorMessage,
                                            UIMessages.StartOverErrorTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
                    await progressController.CloseAsync();

                    return;
                }

                MainWindow.GetMainWindow().RefreshTree(this);

                await progressController.CloseAsync();


                var c = (ItemTreeView.SelectedItem as Category);
                UpdateViews(c);

                await this.ShowMessageAsync(UIMessages.StartOverCompleteTitle, UIMessages.StartOverCompleteMessage);
            }
        }
Пример #5
0
 public Builder(OptimizationProblem optimizationProblem)
 {
     ProblemChecker.Check(optimizationProblem);
     this.optimizationProblem = optimizationProblem;
 }
Пример #6
0
        /// <summary>
        /// Performs post-patch modlist corrections and validation, prompting user also to generate backups after a successful completion.
        /// </summary>
        /// <returns></returns>
        public async Task DoPostPatchCleanup()
        {
            FlexibleMessageBox.Show(_mainWindow.Win32Window, UIMessages.PatchDetectedMessage, "Post Patch Cleanup Starting", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
            MainWindow.MakeHighlander();

            var resetLumina = false;

            await _mainWindow.LockUi("Performing Post-Patch Maintenence", "This may take a few minutes if you have many mods installed.", this);

            var gi = XivCache.GameInfo;

            if (XivCache.GameInfo.UseLumina)
            {
                resetLumina = true;
                XivCache.SetGameInfo(gi.GameDirectory, gi.GameLanguage, gi.DxMode, false, false, gi.LuminaDirectory, gi.UseLumina);
            }

            var workerStatus = XivCache.CacheWorkerEnabled;

            if (workerStatus)
            {
                // Stop the cache worker if it's running.
                XivCache.CacheWorkerEnabled = false;
            }
            try
            {
                var modding = new Modding(_gameDirectory);
                var _index  = new Index(_gameDirectory);
                var _dat    = new Dat(_gameDirectory);

                var validTypes = new List <int>()
                {
                    2, 3, 4
                };

                // We have to do a few things here.
                // 1.  Save a list of what mods were enabled.
                // 2.  Go through and validate everything that says it is enabled actually is enabled, or mark it as disabled and update its original index offset if it is not.
                // 3.  Prompt the user for either a full disable and backup creation, or a restore to normal state (re-enable anything that was enabled before but is not now)
                var modList = modding.GetModList();

                Dictionary <XivDataFile, IndexFile> indexFiles = new Dictionary <XivDataFile, IndexFile>();


                // Cache our currently enabled stuff.
                List <Mod> enabledMods = modList.Mods.Where(x => x.enabled == true).ToList();
                var        toRemove    = new List <Mod>();

                foreach (var mod in modList.Mods)
                {
                    if (!String.IsNullOrEmpty(mod.fullPath))
                    {
                        var df = IOUtil.GetDataFileFromPath(mod.fullPath);
                        if (!indexFiles.ContainsKey(df))
                        {
                            indexFiles[df] = await _index.GetIndexFile(df);
                        }

                        var index1Value       = indexFiles[df].Get8xDataOffset(mod.fullPath);
                        var index2Value       = indexFiles[df].Get8xDataOffsetIndex2(mod.fullPath);
                        var oldOriginalOffset = mod.data.originalOffset;
                        var modOffset         = mod.data.modOffset;


                        // In any event where an offset does not match either of our saved offsets, we must assume this is a new
                        // default file offset for post-patch.
                        if (index1Value != oldOriginalOffset && index1Value != modOffset && index1Value != 0)
                        {
                            // Index 1 value is our new base offset.
                            var type = _dat.GetFileType(index1Value, df);

                            // Make sure the file it's trying to point to is actually valid.
                            if (validTypes.Contains(type))
                            {
                                mod.data.originalOffset = index1Value;
                                mod.enabled             = false;
                            }
                            else
                            {
                                // Oh dear.  The new index is f****d.  Is the old Index Ok?
                                type = _dat.GetFileType(oldOriginalOffset, df);

                                if (validTypes.Contains(type) && oldOriginalOffset != 0)
                                {
                                    // Old index is fine, so keep using that.

                                    // But mark the index value as invalid, so that we stomp on the index value after this.
                                    index1Value = -1;
                                    mod.enabled = false;
                                }
                                else
                                {
                                    // Okay... Maybe the new Index2 Value?
                                    if (index2Value != 0)
                                    {
                                        type = _dat.GetFileType(index2Value, df);
                                        if (validTypes.Contains(type))
                                        {
                                            // Set the index 1 value to invalid so that the if later down the chain stomps the index1 value.
                                            index1Value = -1;

                                            mod.data.originalOffset = index2Value;
                                            mod.enabled             = false;
                                        }
                                        else
                                        {
                                            // We be f****d.
                                            throw new Exception("Unable to determine working original offset for file:" + mod.fullPath);
                                        }
                                    }
                                    else
                                    {
                                        // We be f****d.
                                        throw new Exception("Unable to determine working original offset for file:" + mod.fullPath);
                                    }
                                }
                            }
                        }
                        else if (index2Value != oldOriginalOffset && index2Value != modOffset && index2Value != 0)
                        {
                            // Our Index 1 was normal, but our Index 2 is changed to an unknown value.
                            // If the index 2 points to a valid file, we must assume that this new file
                            // is our new base data offset.

                            var type = _dat.GetFileType(index2Value, df);

                            if (validTypes.Contains(type) && index2Value != 0)
                            {
                                mod.data.originalOffset = index2Value;
                                mod.enabled             = false;
                            }
                            else
                            {
                                // Oh dear.  The new index is f****d.  Is the old Index Ok?
                                type = _dat.GetFileType(oldOriginalOffset, df);

                                if (validTypes.Contains(type) && oldOriginalOffset != 0)
                                {
                                    // Old index is fine, so keep using that, but set the index2 value to invalid to ensure we
                                    // stomp on the current broken index value.
                                    index2Value = -1;
                                }
                                else
                                {
                                    // We be f****d.
                                    throw new Exception("Unable to determine working original offset for file:" + mod.fullPath);
                                }
                            }
                        }

                        // Indexes don't match.  This can occur if SE adds something to index2 that didn't exist in index2 before.
                        if (index1Value != index2Value && index2Value != 0)
                        {
                            // We should never actually get to this state for file-addition mods.  If we do, uh.. I guess correct the indexes and yolo?
                            // ( Only way we get here is if SE added a new file at the same name as a file the user had created via modding, in which case, it's technically no longer a file addition mod )
                            indexFiles[df].SetDataOffset(mod.fullPath, mod.data.originalOffset);
                            index1Value = mod.data.originalOffset;
                            index2Value = mod.data.originalOffset;

                            mod.enabled = false;
                        }

                        // Set it to the corrected state.
                        if (index1Value == mod.data.modOffset)
                        {
                            mod.enabled = true;
                        }
                        else
                        {
                            mod.enabled = false;
                        }

                        // Perform a basic file type check on our results.
                        var fileType         = _dat.GetFileType(mod.data.modOffset, IOUtil.GetDataFileFromPath(mod.fullPath));
                        var originalFileType = _dat.GetFileType(mod.data.modOffset, IOUtil.GetDataFileFromPath(mod.fullPath));

                        if (!validTypes.Contains(fileType) || mod.data.modOffset == 0)
                        {
                            // Mod data is busted.  Fun.
                            toRemove.Add(mod);
                        }

                        if ((!validTypes.Contains(originalFileType)) || mod.data.originalOffset == 0)
                        {
                            if (mod.IsCustomFile())
                            {
                                // Okay, in this case this is recoverable as the mod is a custom addition anyways, so we can just delete it.
                                if (!toRemove.Contains(mod))
                                {
                                    toRemove.Add(mod);
                                }
                            }
                            else
                            {
                                // Update ended up with us unable to find a working offset.  Double fun.
                                throw new Exception("Unable to determine working offset for file:" + mod.fullPath);
                            }
                        }
                    }

                    // Okay, this mod is now represented in the modlist in it's actual post-patch index state.
                    var datNum = (int)((mod.data.modOffset / 8) & 0x0F) / 2;
                    var dat    = XivDataFiles.GetXivDataFile(mod.datFile);

                    var originalDats = await _dat.GetUnmoddedDatList(dat);

                    var datPath = $"{dat.GetDataFileName()}{Dat.DatExtension}{datNum}";

                    // Test for SE Dat file rollover.
                    if (originalDats.Contains(datPath))
                    {
                        // Shit.  This means that the dat file where this mod lived got eaten by SE.  We have to destroy the modlist entry at this point.
                        toRemove.Add(mod);
                    }
                }

                // Save any index changes we made.
                foreach (var dkv in indexFiles)
                {
                    await _index.SaveIndexFile(dkv.Value);
                }

                // The modlist is now saved in its current index-represented post patch state.
                modding.SaveModList(modList);

                // We now need to clear out any mods that are irreparably f****d, and clear out all of our
                // internal data files so we can rebuild them later.

                var internalFiles = modList.Mods.Where(x => x.IsInternal());
                toRemove.AddRange(internalFiles);

                if (toRemove.Count > 0)
                {
                    var removedString = "";

                    // Soft-Disable all metadata mods, since we're going to purge their internal file entries.
                    var metadata = modList.Mods.Where(x => x.fullPath.EndsWith(".meta") || x.fullPath.EndsWith(".rgsp"));
                    foreach (var mod in metadata)
                    {
                        var df = IOUtil.GetDataFileFromPath(mod.fullPath);
                        await modding.ToggleModUnsafe(false, mod, true, false, indexFiles[df], modList);
                    }

                    foreach (var mod in toRemove)
                    {
                        if (mod.data.modOffset == 0 || mod.data.originalOffset == 0)
                        {
                            if (mod.data.originalOffset == 0 && mod.enabled)
                            {
                                // This is awkward.  We have a mod whose data got bashed, but has no valid original offset to restore.
                                // So the indexes here are f****d if we do, f****d if we don't.
                                throw new Exception("Patch-Broken file has no valid index to restore.  Clean Index Restoration required.");
                            }

                            modList.Mods.Remove(mod);
                            enabledMods.Remove(mod);
                            removedString += mod.fullPath + "\n";
                        }
                        else
                        {
                            if (mod.enabled)
                            {
                                var df = IOUtil.GetDataFileFromPath(mod.fullPath);
                                await modding.ToggleModUnsafe(false, mod, true, false, indexFiles[df], modList);
                            }

                            modList.Mods.Remove(mod);

                            // Since we're deleting this entry entirely, we can't leave it in the other cached list either to get re-enabled later.
                            enabledMods.Remove(mod);

                            if (!mod.IsInternal())
                            {
                                removedString += mod.fullPath + "\n";
                            }
                        }
                    }

                    // Save the index files and modlist again now that we've removed all the invalid entries.
                    foreach (var dkv in indexFiles)
                    {
                        await _index.SaveIndexFile(dkv.Value);
                    }
                    modding.SaveModList(modList);

                    // Show the user a message if we purged any real files.
                    if (toRemove.Any(x => !String.IsNullOrEmpty(x.fullPath) && !x.IsInternal()))
                    {
                        var text = String.Format(UIMessages.PatchDestroyedFiles, removedString);

                        FlexibleMessageBox.Show(_mainWindow.Win32Window, text, "Destroyed Files Notification", MessageBoxButtons.OK, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1);
                    }
                }

                // Always create clean index backups after this process is completed.

                _mainWindow.LockProgress.Report("Disabling Mods...");
                await modding.ToggleAllMods(false);

                _mainWindow.LockProgress.Report("Creating Index Backups...");
                var           pc = new ProblemChecker(_gameDirectory);
                DirectoryInfo backupDir;
                try
                {
                    Directory.CreateDirectory(Settings.Default.Backup_Directory);
                    backupDir = new DirectoryInfo(Settings.Default.Backup_Directory);
                }
                catch
                {
                    throw new Exception("Unable to create index backups.\nThe Index Backup directory is invalid or inaccessible: " + Settings.Default.Backup_Directory);
                }

                await pc.BackupIndexFiles(backupDir);

                // Now restore the modlist enable/disable state back to how the user had it before.
                _mainWindow.LockProgress.Report("Re-Enabling mods...");

                // Re-enable things.
                await modding.ToggleMods(true, enabledMods.Select(x => x.fullPath));

                FlexibleMessageBox.Show(_mainWindow.Win32Window, UIMessages.PostPatchComplete, "Post-Patch Process Complete", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
            }
            catch (Exception Ex)
            {
                // Show the user the error, then let them go about their business of fixing things.
                FlexibleMessageBox.Show(_mainWindow.Win32Window, String.Format(UIMessages.PostPatchError, Ex.Message), "Post-Patch Failure", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
            }
            finally
            {
                if (resetLumina)
                {
                    // Reset lumina mode back to on if we disabled it to perform update checks.
                    XivCache.SetGameInfo(gi.GameDirectory, gi.GameLanguage, gi.DxMode, true, false, gi.LuminaDirectory, true);
                }

                XivCache.CacheWorkerEnabled = workerStatus;
                await _mainWindow.UnlockUi(this);
            }
        }
Пример #7
0
        /// <summary>
        /// Event handler for the start over menu item clicked
        /// </summary>
        private async void Menu_StartOver_Click(object sender, RoutedEventArgs e)
        {
            var gameDirectory = new DirectoryInfo(Settings.Default.FFXIV_Directory);

            var index    = new Index(gameDirectory);
            var outdated = false;

            if (index.IsIndexLocked(XivDataFile._0A_Exd))
            {
                FlexibleMessageBox.Show(UIMessages.IndexLockedErrorMessage, UIMessages.IndexLockedErrorTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);

                return;
            }

            var result = FlexibleMessageBox.Show(UIMessages.StartOverMessage, UIMessages.StartOverTitle, MessageBoxButtons.YesNo, MessageBoxIcon.Information);

            if (result == System.Windows.Forms.DialogResult.Yes)
            {
                var indexBackupsDirectory = new DirectoryInfo(Settings.Default.Backup_Directory);

                if (!Directory.Exists(indexBackupsDirectory.FullName))
                {
                    FlexibleMessageBox.Show(UIMessages.BackupFolderAccessErrorMessage,
                                            UIMessages.IndexBackupsErrorTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }

                var filesToCheck = new XivDataFile[] { XivDataFile._01_Bgcommon, XivDataFile._04_Chara, XivDataFile._06_Ui };

                var problemChecker = new ProblemChecker(gameDirectory);

                foreach (var xivDataFile in filesToCheck)
                {
                    var backupFile = new DirectoryInfo($"{indexBackupsDirectory.FullName}\\{xivDataFile.GetDataFileName()}.win32.index");

                    if (!File.Exists(backupFile.FullName))
                    {
                        continue;
                    }

                    var outdatedCheck = await problemChecker.CheckForOutdatedBackups(xivDataFile, indexBackupsDirectory);

                    if (!outdatedCheck)
                    {
                        FlexibleMessageBox.Show(UIMessages.OutdatedBackupsErrorMessage, UIMessages.IndexBackupsErrorTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);

                        outdated = true;
                    }
                }

                await Task.Run(async() =>
                {
                    var modding = new Modding(gameDirectory);
                    await modding.DeleteAllFilesAddedByTexTools();

                    var dat = new Dat(gameDirectory);

                    var modListDirectory = new DirectoryInfo(Path.Combine(gameDirectory.Parent.Parent.FullName, XivStrings.ModlistFilePath));

                    var backupFiles = Directory.GetFiles(indexBackupsDirectory.FullName);

                    // Make sure backups exist
                    if (backupFiles.Length == 0)
                    {
                        FlexibleMessageBox.Show(string.Format(UIMessages.NoBackupsFoundErrorMessage, indexBackupsDirectory.FullName),
                                                UIMessages.BackupFilesMissingTitle, MessageBoxButtons.OK, MessageBoxIcon.Warning);

                        // Toggle off all mods
                        await modding.ToggleAllMods(false);
                    }
                    else if (outdated)
                    {
                        // Toggle off all mods
                        await modding.ToggleAllMods(false);
                    }
                    else
                    {
                        // Copy backups to ffxiv folder
                        foreach (var backupFile in backupFiles)
                        {
                            if (backupFile.Contains(".win32.index"))
                            {
                                File.Copy(backupFile, $"{gameDirectory}/{Path.GetFileName(backupFile)}", true);
                            }
                        }
                    }

                    // Delete modded dat files
                    foreach (var xivDataFile in (XivDataFile[])Enum.GetValues(typeof(XivDataFile)))
                    {
                        var datFiles = await dat.GetModdedDatList(xivDataFile);

                        foreach (var datFile in datFiles)
                        {
                            File.Delete(datFile);
                        }

                        if (datFiles.Count > 0)
                        {
                            await problemChecker.RepairIndexDatCounts(xivDataFile);
                        }
                    }

                    // Delete mod list
                    File.Delete(modListDirectory.FullName);

                    modding.CreateModlist();
                });

                UpdateViews(ItemTreeView.SelectedItem as Category);

                await this.ShowMessageAsync(UIMessages.StartOverCompleteTitle, UIMessages.StartOverCompleteMessage);
            }
        }
Пример #8
0
 public IOptimizationAlgorithm Build()
 {
     ProblemChecker.Check(optimizationProblem);
     return(new DifferentialEvolutionAlgorithm(optimizationProblem, PopulationSize,
                                               MutationFactor, CrossoverProbability, ConvergenceCriterion, RandomNumberGenerator));
 }
Пример #9
0
        public static Problem Parse(string filePath, char problemLetter, string problemColor)
        {
            var zip        = ZipFile.OpenRead(filePath);
            var zipEntries = zip.Entries.ToArray();

            var xmlEntry   = zip.GetEntry("problem.xml") ?? throw new Exception("problem.xml not found");
            var problemXml = XDocument.Load(xmlEntry.Open());

            // Problem element
            var problemElem = problemXml.Root;

            AssertNoOtherAttributes(problemElem, "url", "short-name", "revision");
            AssertNoOtherChildren(problemElem, "names", "statements", "tutorials", "judging", "files", "assets", "properties", "stresses", "documents", "tags");
            var problemId = problemElem.Attribute("short-name").Value;

            // Problem names collection
            var problemNamesElem = SingleChild(problemElem, "names");

            AssertNoAttributes(problemNamesElem);
            AssertNoOtherChildren(problemNamesElem, "name");
            // Problem names children
            var problemNamesElems = problemNamesElem.Elements("name");
            var problemNameElem   = problemNamesElems.SingleOrDefault(e =>
            {
                AssertNoChildren(e);
                AssertNoOtherAttributes(e, "language", "value");
                return(e.Attribute("language").Value == "english");
            }) ?? throw new Exception("Problem name in English not found.");
            var problemName = problemNameElem.Attribute("value").Value;

            // We ignore tutorials

            // Judging info
            var judgingElem = SingleChild(problemElem, "judging");

            AssertNoOtherAttributes(judgingElem, "cpu-name", "cpu-speed", "input-file", "output-file");
            //AssertAttributeIs(judgingElem, "cpu-speed", "3600");
            AssertAttributeIs(judgingElem, "input-file", "");
            AssertAttributeIs(judgingElem, "output-file", "");
            AssertNoOtherChildren(judgingElem, "testset");
            var problemTests = judgingElem.Elements("testset").Select(testSetsElem =>
            {
                AssertNoOtherAttributes(testSetsElem, "name");
                AssertNoOtherChildren(testSetsElem, "time-limit", "memory-limit", "test-count", "input-path-pattern", "answer-path-pattern", "tests");
                AssertDirectChildrenHaveNoAttributes(testSetsElem);
                var testsElem = SingleChild(testSetsElem, "tests");
                AssertNoOtherChildren(testsElem, "test");
                AssertChildrenCountIs(testsElem, int.Parse(testSetsElem.Element("test-count").Value));
                return(new
                {
                    TimeLimit = int.Parse(testSetsElem.Element("time-limit").Value),
                    MemoryLimit = int.Parse(testSetsElem.Element("memory-limit").Value),
                    Tests = testsElem.Elements("test").Select((testElem, idx) =>
                    {
                        AssertNoOtherAttributes(testElem, "method", "from-file", "cmd", "sample");
                        int realIdx = idx + 1; // polygon is 1-based...
                        return new ProblemTestCase(
                            isSample: testElem.Attribute("sample")?.Value == "true",
                            input: ReadZipEntryText(zip.GetEntry(Printf(testSetsElem.Element("input-path-pattern").Value, realIdx))),
                            output: ReadZipEntryText(zip.GetEntry(Printf(testSetsElem.Element("answer-path-pattern").Value, realIdx)))
                            );
                    }).ToArray() // NOTE: always use eager eval to avoid later errors
                });
            }).Aggregate((a, b) =>
            {
                if (a.TimeLimit != b.TimeLimit)
                {
                    throw new Exception("Different time limits per test set are not supported.");
                }
                if (a.MemoryLimit != b.MemoryLimit)
                {
                    throw new Exception("Different memory limits per test set are not supported.");
                }

                return(new
                {
                    TimeLimit = a.TimeLimit,
                    MemoryLimit = b.MemoryLimit,
                    Tests = a.Tests.Concat(b.Tests).ToArray()
                });
            });

            // Files
            var filesElem = SingleChild(problemElem, "files");

            AssertNoAttributes(filesElem);
            AssertNoOtherChildren(filesElem, "resources", "executables"); // we ignore executables
            var resourcesElem = SingleChild(filesElem, "resources");

            AssertNoAttributes(resourcesElem);
            AssertNoOtherChildren(resourcesElem, "file");
            var allFiles = resourcesElem.Elements("file").Select(fileElem =>
            {
                AssertNoOtherAttributes(fileElem, "type", "path");
                AssertNoChildren(fileElem);
                var path = fileElem.Attribute("path").Value;
                AssertFileHasType(path, "h", "cpp", "sty", "tex", "ftl");
                return(path);
            });
            var cppAndHFiles = allFiles.Where(s => s.EndsWith(".h") || s.EndsWith(".cpp")).Select(path =>
                                                                                                  ReadZipEntry(zip.GetEntry(path))
                                                                                                  );

            // Assets
            var assetsElem = SingleChild(problemElem, "assets");

            AssertNoAttributes(assetsElem);
            AssertNoOtherChildren(assetsElem, "checker", "validators", "solutions");
            var checkerElem = SingleChild(assetsElem, "checker");

            AssertNoOtherAttributes(checkerElem, "name", "type");
            AssertAttributeIs(checkerElem, "type", "testlib");
            AssertNoOtherChildren(checkerElem, "source", "binary", "copy", "testset");
            // We ignore copy and testset
            var checkerSourceElem = SingleChild(checkerElem, "source");

            AssertNoOtherAttributes(checkerSourceElem, "type", "path");
            AssertNoChildren(checkerSourceElem);
            var checkerSourceEntry = zip.GetEntry(checkerSourceElem.Attribute("path").Value);
            var checkerFile        = ReadZipEntry(checkerSourceEntry);
            var problemChecker     = new ProblemChecker(
                language: ParseProgrammingLanguage(checkerSourceElem.Attribute("type").Value),
                files: cppAndHFiles.Append(checkerFile).ToImmutableArray(),
                mainFile: checkerFile
                );

            // Statement
            var statementsElem = SingleChild(problemElem, "statements");

            AssertNoAttributes(statementsElem);
            AssertNoOtherChildren(statementsElem, "statement");
            var statementPath = statementsElem.Elements("statement").Where(s => s.Attribute("language").Value == "english").Single(statementElem =>
            {
                AssertNoOtherAttributes(statementElem, "language", "path", "type", "charset", "mathjax");
                AssertNoChildren(statementElem);
                return(statementElem.Attribute("type").Value == "application/pdf");
            }).Attribute("path").Value;

            // solutions
            var solutions     = new List <(ProblemFile, ProblemJudgement)>();
            var solutionsElem = SingleChild(assetsElem, "solutions");

            foreach (var sol in solutionsElem.Elements())
            {
                var result = sol.Attribute("tag").Value;
                var j      = result == "accepted" ? ProblemJudgement.Accepted : result == "main" ? ProblemJudgement.Accepted : result == "wrong-answer" ? ProblemJudgement.WrongAnswer : result == "time-limit-exceeded" ? ProblemJudgement.TimeLimit : ProblemJudgement.OtherError;
                var source = sol.Element("source").Attribute("path").Value;
                solutions.Add((ReadZipEntry(zip.GetEntry(source)), j));
            }

            // We ignore properties, stresses and documents
            return(new Problem(
                       id: problemLetter.ToString(),
                       name: problemName,
                       color: problemColor,
                       statement: ReadZipEntry(zip.GetEntry(statementPath)),
                       checker: problemChecker,
                       limits: new ProblemLimits(problemTests.TimeLimit / 1000.0M, problemTests.MemoryLimit),
                       testCases: problemTests.Tests.ToImmutableArray(),
                       solutions: solutions.ToImmutableArray()
                       ));
        }