415 lines
16 KiB
C#
415 lines
16 KiB
C#
using System.Text;
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using System.Text.Json;
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using System.IO.Compression;
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namespace LMEMappeCatastaliApp.Services;
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public sealed class ProjectStorageService
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{
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private const string ProjectExtension = ".lmeproject.json";
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private readonly SemaphoreSlim _gate = new(1, 1);
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private readonly JsonSerializerOptions _jsonOptions = new(JsonSerializerDefaults.Web)
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{
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WriteIndented = true
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};
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private string ProjectsDirectory => Path.Combine(FileSystem.AppDataDirectory, "Projects");
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private string HistoryDirectory => Path.Combine(ProjectsDirectory, ".history");
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public async Task<IReadOnlyList<MapProjectSummary>> GetProjectsAsync(bool includeArchived = true)
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{
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await _gate.WaitAsync();
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try
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{
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var files = await ReadProjectFilesAsync();
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return files
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.Select(item => item.Document.ToSummary())
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.Where(item => includeArchived || !item.IsArchived)
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.OrderByDescending(item => item.UpdatedAt)
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.ThenBy(item => item.Name, StringComparer.CurrentCultureIgnoreCase)
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.ToArray();
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}
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finally
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{
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_gate.Release();
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}
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}
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public async Task<MapProjectSummary> SaveAsync(
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string name,
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string snapshotJson,
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bool includesCadastralParcels,
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string? projectId = null)
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{
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var normalizedName = NormalizeName(name);
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using var snapshotDocument = JsonDocument.Parse(snapshotJson);
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if (snapshotDocument.RootElement.ValueKind != JsonValueKind.Object)
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{
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throw new InvalidDataException("I dati della mappa non sono validi.");
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}
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await _gate.WaitAsync();
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try
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{
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Directory.CreateDirectory(ProjectsDirectory);
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var files = await ReadProjectFilesAsync();
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var existing = files.FirstOrDefault(item =>
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(!string.IsNullOrWhiteSpace(projectId) && item.Document.Id == projectId)
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|| string.Equals(item.Document.Name, normalizedName, StringComparison.CurrentCultureIgnoreCase));
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var now = DateTimeOffset.UtcNow;
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var id = existing?.Document.Id ?? Guid.NewGuid().ToString("N");
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if (existing is not null)
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{
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Directory.CreateDirectory(HistoryDirectory);
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var revisionName = $"{id}--{existing.Document.UpdatedAt:yyyyMMddHHmmssfff}{ProjectExtension}";
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File.Copy(existing.Path, Path.Combine(HistoryDirectory, revisionName), true);
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PruneHistory(id, 15);
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}
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var document = new MapProjectDocument
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{
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SchemaVersion = 2,
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Id = id,
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Name = normalizedName,
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CreatedAt = existing?.Document.CreatedAt ?? now,
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UpdatedAt = now,
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IncludesCadastralParcels = includesCadastralParcels,
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Folder = existing?.Document.Folder ?? string.Empty,
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IsArchived = existing?.Document.IsArchived ?? false,
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Map = snapshotDocument.RootElement.Clone()
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};
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var path = existing?.Path ?? Path.Combine(ProjectsDirectory, BuildFileName(normalizedName, id));
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var temporaryPath = path + ".tmp";
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try
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{
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await File.WriteAllTextAsync(
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temporaryPath,
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JsonSerializer.Serialize(document, _jsonOptions),
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new UTF8Encoding(false));
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File.Move(temporaryPath, path, true);
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}
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finally
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{
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if (File.Exists(temporaryPath))
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{
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File.Delete(temporaryPath);
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}
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}
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return document.ToSummary();
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}
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finally
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{
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_gate.Release();
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}
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}
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public async Task<MapProjectSummary> DuplicateAsync(string projectId)
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{
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await _gate.WaitAsync();
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try
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{
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var files = await ReadProjectFilesAsync();
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var source = files.FirstOrDefault(item => item.Document.Id == projectId)
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?? throw new FileNotFoundException("Il progetto selezionato non esiste piu'.");
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var usedNames = files.Select(item => item.Document.Name).ToHashSet(StringComparer.CurrentCultureIgnoreCase);
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var baseName = $"{source.Document.Name} - copia";
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var name = baseName;
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for (var index = 2; usedNames.Contains(name); index++)
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{
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name = $"{baseName} {index}";
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}
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var now = DateTimeOffset.UtcNow;
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var id = Guid.NewGuid().ToString("N");
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var copy = new MapProjectDocument
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{
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SchemaVersion = 2,
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Id = id,
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Name = name,
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CreatedAt = now,
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UpdatedAt = now,
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IncludesCadastralParcels = source.Document.IncludesCadastralParcels,
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Folder = source.Document.Folder,
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Map = source.Document.Map.Clone()
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};
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var path = Path.Combine(ProjectsDirectory, BuildFileName(name, id));
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await File.WriteAllTextAsync(path, JsonSerializer.Serialize(copy, _jsonOptions), new UTF8Encoding(false));
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return copy.ToSummary();
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}
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finally { _gate.Release(); }
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}
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public async Task UpdateOrganizationAsync(string projectId, string? folder = null, bool? isArchived = null)
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{
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await _gate.WaitAsync();
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try
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{
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var project = (await ReadProjectFilesAsync()).FirstOrDefault(item => item.Document.Id == projectId)
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?? throw new FileNotFoundException("Il progetto selezionato non esiste piu'.");
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project.Document.Folder = NormalizeFolder(folder ?? project.Document.Folder);
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project.Document.IsArchived = isArchived ?? project.Document.IsArchived;
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project.Document.UpdatedAt = DateTimeOffset.UtcNow;
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await File.WriteAllTextAsync(project.Path, JsonSerializer.Serialize(project.Document, _jsonOptions), new UTF8Encoding(false));
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}
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finally { _gate.Release(); }
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}
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public async Task<IReadOnlyList<MapProjectVersion>> GetVersionsAsync(string projectId)
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{
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await _gate.WaitAsync();
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try
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{
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Directory.CreateDirectory(HistoryDirectory);
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var versions = new List<MapProjectVersion>();
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foreach (var path in Directory.EnumerateFiles(HistoryDirectory, $"{projectId}--*{ProjectExtension}"))
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{
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try
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{
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await using var stream = File.OpenRead(path);
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var document = await JsonSerializer.DeserializeAsync<MapProjectDocument>(stream, _jsonOptions);
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if (document is not null)
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{
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versions.Add(new(Path.GetFileName(path), document.UpdatedAt));
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}
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}
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catch (JsonException) { }
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catch (IOException) { }
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}
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return versions.OrderByDescending(item => item.UpdatedAt).ToArray();
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}
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finally { _gate.Release(); }
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}
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public async Task<string> LoadVersionAsync(string projectId, string versionId)
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{
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await _gate.WaitAsync();
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try
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{
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if (!versionId.StartsWith($"{projectId}--", StringComparison.Ordinal)
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|| Path.GetFileName(versionId) != versionId)
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{
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throw new InvalidDataException("Revisione non valida.");
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}
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var path = Path.Combine(HistoryDirectory, versionId);
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await using var stream = File.OpenRead(path);
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var document = await JsonSerializer.DeserializeAsync<MapProjectDocument>(stream, _jsonOptions)
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?? throw new InvalidDataException("Revisione non leggibile.");
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return document.Map.GetRawText();
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}
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finally { _gate.Release(); }
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}
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public async Task<string> CreateBackupAsync()
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{
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await _gate.WaitAsync();
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try
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{
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Directory.CreateDirectory(ProjectsDirectory);
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var directory = Path.Combine(FileSystem.CacheDirectory, "Backups");
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Directory.CreateDirectory(directory);
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var path = Path.Combine(directory, $"LMEMappeCatastali-backup-{DateTime.Now:yyyyMMdd-HHmmss}.lmebackup.zip");
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if (File.Exists(path)) File.Delete(path);
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ZipFile.CreateFromDirectory(ProjectsDirectory, path, CompressionLevel.Optimal, false);
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return path;
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}
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finally { _gate.Release(); }
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}
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public async Task<int> RestoreBackupAsync(string backupPath)
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{
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await _gate.WaitAsync();
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try
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{
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Directory.CreateDirectory(ProjectsDirectory);
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using var archive = ZipFile.OpenRead(backupPath);
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var restored = 0;
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foreach (var entry in archive.Entries.Where(item => item.FullName.EndsWith(ProjectExtension, StringComparison.OrdinalIgnoreCase)))
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{
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var fileName = Path.GetFileName(entry.FullName);
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if (string.IsNullOrWhiteSpace(fileName)) continue;
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var targetDirectory = entry.FullName.Contains(".history/", StringComparison.OrdinalIgnoreCase)
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|| entry.FullName.Contains(".history\\", StringComparison.OrdinalIgnoreCase)
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? HistoryDirectory : ProjectsDirectory;
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Directory.CreateDirectory(targetDirectory);
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entry.ExtractToFile(Path.Combine(targetDirectory, fileName), true);
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if (targetDirectory == ProjectsDirectory) restored++;
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}
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return restored;
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}
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finally { _gate.Release(); }
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}
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public async Task<string> CreateProjectPackageAsync(string projectId)
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{
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await _gate.WaitAsync();
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try
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{
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var project = (await ReadProjectFilesAsync()).FirstOrDefault(item => item.Document.Id == projectId)
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?? throw new FileNotFoundException("Il progetto selezionato non esiste piu'.");
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var directory = Path.Combine(FileSystem.CacheDirectory, "Projects");
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Directory.CreateDirectory(directory);
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var path = Path.Combine(directory, Path.GetFileName(project.Path));
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File.Copy(project.Path, path, true);
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return path;
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}
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finally { _gate.Release(); }
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}
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public async Task<MapProjectSummary> ImportProjectAsync(string path)
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{
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await _gate.WaitAsync();
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try
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{
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await using var stream = File.OpenRead(path);
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var source = await JsonSerializer.DeserializeAsync<MapProjectDocument>(stream, _jsonOptions)
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?? throw new InvalidDataException("Progetto non leggibile.");
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if (source.Map.ValueKind != JsonValueKind.Object) throw new InvalidDataException("Mappa del progetto non valida.");
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source.Id = Guid.NewGuid().ToString("N");
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source.Name = NormalizeName(source.Name);
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source.CreatedAt = source.UpdatedAt = DateTimeOffset.UtcNow;
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source.IsArchived = false;
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Directory.CreateDirectory(ProjectsDirectory);
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var target = Path.Combine(ProjectsDirectory, BuildFileName(source.Name, source.Id));
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await File.WriteAllTextAsync(target, JsonSerializer.Serialize(source, _jsonOptions), new UTF8Encoding(false));
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return source.ToSummary();
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}
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finally { _gate.Release(); }
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}
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public async Task<string> LoadAsync(string projectId)
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{
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await _gate.WaitAsync();
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try
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{
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var project = (await ReadProjectFilesAsync())
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.FirstOrDefault(item => item.Document.Id == projectId)
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?? throw new FileNotFoundException("Il progetto selezionato non esiste piu'.");
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return project.Document.Map.GetRawText();
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}
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finally
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{
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_gate.Release();
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}
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}
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public async Task DeleteAsync(string projectId)
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{
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await _gate.WaitAsync();
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try
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{
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var project = (await ReadProjectFilesAsync())
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.FirstOrDefault(item => item.Document.Id == projectId)
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?? throw new FileNotFoundException("Il progetto selezionato non esiste piu'.");
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File.Delete(project.Path);
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if (Directory.Exists(HistoryDirectory))
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{
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foreach (var path in Directory.EnumerateFiles(HistoryDirectory, $"{projectId}--*{ProjectExtension}"))
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{
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File.Delete(path);
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}
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}
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}
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finally
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{
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_gate.Release();
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}
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}
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private async Task<IReadOnlyList<ProjectFileEntry>> ReadProjectFilesAsync()
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{
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Directory.CreateDirectory(ProjectsDirectory);
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var projects = new List<ProjectFileEntry>();
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foreach (var path in Directory.EnumerateFiles(ProjectsDirectory, $"*{ProjectExtension}"))
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{
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try
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{
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await using var stream = File.OpenRead(path);
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var document = await JsonSerializer.DeserializeAsync<MapProjectDocument>(stream, _jsonOptions);
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if (document is not null
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&& !string.IsNullOrWhiteSpace(document.Id)
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&& !string.IsNullOrWhiteSpace(document.Name)
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&& document.Map.ValueKind == JsonValueKind.Object)
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{
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projects.Add(new ProjectFileEntry(path, document));
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}
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}
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catch (JsonException)
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{
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// A damaged project is ignored so the remaining archive stays usable.
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}
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catch (IOException)
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{
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}
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}
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return projects;
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}
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private static string NormalizeName(string name)
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{
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var normalized = string.Join(' ', (name ?? string.Empty).Split(
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[' ', '\t', '\r', '\n'],
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StringSplitOptions.RemoveEmptyEntries));
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if (string.IsNullOrWhiteSpace(normalized))
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{
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throw new ArgumentException("Inserisci il nome del progetto.");
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}
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return normalized.Length <= 80 ? normalized : normalized[..80];
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}
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private static string BuildFileName(string name, string id)
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{
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var invalid = Path.GetInvalidFileNameChars().ToHashSet();
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var safeName = new string(name
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.Select(character => invalid.Contains(character) ? '-' : character)
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.ToArray())
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.Trim(' ', '.');
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safeName = string.IsNullOrWhiteSpace(safeName) ? "Progetto" : safeName;
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return $"{safeName}--{id[..8]}{ProjectExtension}";
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}
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private void PruneHistory(string projectId, int keep)
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{
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foreach (var path in Directory.EnumerateFiles(HistoryDirectory, $"{projectId}--*{ProjectExtension}")
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.OrderByDescending(File.GetLastWriteTimeUtc).Skip(keep))
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{
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File.Delete(path);
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}
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}
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private static string NormalizeFolder(string value)
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{
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var normalized = string.Join(' ', (value ?? string.Empty).Split([' ', '\t', '\r', '\n'], StringSplitOptions.RemoveEmptyEntries));
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return normalized[..Math.Min(normalized.Length, 60)];
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}
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private sealed record ProjectFileEntry(string Path, MapProjectDocument Document);
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private sealed class MapProjectDocument
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{
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public int SchemaVersion { get; set; }
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public string Id { get; set; } = string.Empty;
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public string Name { get; set; } = string.Empty;
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public DateTimeOffset CreatedAt { get; set; }
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public DateTimeOffset UpdatedAt { get; set; }
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public bool IncludesCadastralParcels { get; set; }
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public string Folder { get; set; } = string.Empty;
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public bool IsArchived { get; set; }
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public JsonElement Map { get; set; }
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public MapProjectSummary ToSummary() => new(Id, Name, UpdatedAt, IncludesCadastralParcels, Folder, IsArchived);
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}
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}
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public sealed record MapProjectSummary(
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string Id,
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string Name,
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DateTimeOffset UpdatedAt,
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bool IncludesCadastralParcels,
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string Folder,
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bool IsArchived);
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public sealed record MapProjectVersion(string Id, DateTimeOffset UpdatedAt);
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