Invia i log a parti e chiedi se includere le foto

Le foto venivano zippate tutte in un unico allegato: oltre i 100 MB i servizi
rifiutavano l'invio (MaxUploadSizeExceededException) e, costruendo tutto in RAM
sul thread della UI, il dispositivo si bloccava.

- Invio diviso in più email da massimo ~40 MB ciascuna
- Zip scritti su disco una parte alla volta e caricati in streaming
- Preparazione in background, avanzamento "parte X di N"
- Richiesta se includere le foto, con il loro peso (default: solo i log)
- Database inviato insieme al file -wal
- Avviso subito se si è offline

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
This commit is contained in:
MarcoEandClaude Opus 5.5 committed 2026-09-28 12:10:19 +02:00
1 parent a4e5709be6
commit 9799f6b0c7
9 files changed
+403 -183

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+49 -139
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@@ -1,5 +1,4 @@
using System.IO.Compression;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging;
using SteUp.Data.LocalDb;
using SteUp.Shared.Core.Dto;
using SteUp.Shared.Core.Entities;
@@ -343,146 +342,57 @@ public class FileManager(
private static string GetInspectionKey(Ispezione ispezione) =>
$"{ispezione.CodMdep}_{ispezione.Data:ddMMyyyy}_{ispezione.Rilevatore.ToLower()}";
public List<SendEmailDto.AttachmentsDto> GetFileForExport()
public Task<long> GetLogExportImagesSizeAsync(CancellationToken ct = default) =>
Task.Run(() => RetrieveAttachedImages().Sum(x => x.File.Length), ct);
public Task<ILogExport> PrepareLogExportAsync(bool includeImages, CancellationToken ct = default)
{
var attachments = new List<SendEmailDto.AttachmentsDto>();
// 1) log file singolo (se ti serve ancora)
var logFile = RetrieveLogFile();
if (!logFile.IsNullOrEmpty())
return Task.Run<ILogExport>(() =>
{
attachments.Add(new SendEmailDto.AttachmentsDto
{
FileName = $"logs_{DateTime.Today:yyyyMMdd}.zip",
FileContent = CreateZipBytes(logFile!)
});
}
var workDir = Path.Combine(FileSystem.CacheDirectory, "log_export");
// 2) database zip
var dbZip = CreateDatabaseZipAttachment();
if (dbZip != null) attachments.Add(dbZip);
// 3) Img zip
var attachedInfo = new DirectoryInfo(Path.Combine(FileSystem.AppDataDirectory, "attached"));
if (!attachedInfo.Exists) return attachments;
var attachedFiles = attachedInfo
// Residui di un invio interrotto (app chiusa a metà): si riparte da zero.
if (Directory.Exists(workDir))
Directory.Delete(workDir, true);
Directory.CreateDirectory(workDir);
var logFiles = RetrieveLogFiles()
.Select(f => new LogExport.ZipItem(f, f.Name))
.ToList();
// Col journal WAL le modifiche recenti stanno ancora nel file -wal: senza, il database
// inviato può non avere le ultime ispezioni.
var dbPath = dbPathProvider.GetDbPath();
var dbFiles = new[] { dbPath, $"{dbPath}-wal" }
.Select(p => new FileInfo(p))
.Where(f => f.Exists)
.Select(f => new LogExport.ZipItem(f, f.Name))
.ToList();
var images = includeImages ? RetrieveAttachedImages() : [];
return new LogExport(workDir, logFiles, dbFiles, images, logger);
}, ct);
}
private static List<FileInfo> RetrieveLogFiles()
{
var directory = new DirectoryInfo(Path.Combine(FileSystem.AppDataDirectory, "logs"));
return directory.Exists ? directory.GetFiles().ToList() : [];
}
private static List<LogExport.ZipItem> RetrieveAttachedImages()
{
var root = new DirectoryInfo(Path.Combine(FileSystem.AppDataDirectory, "attached"));
if (!root.Exists) return [];
// Ordine per percorso: le foto della stessa ispezione finiscono nella stessa parte.
// Il percorso relativo mantiene le cartelle dentro lo zip (separatore "/" per compatibilità).
return root
.EnumerateFiles("*", SearchOption.AllDirectories)
.OrderBy(f => f.FullName, StringComparer.Ordinal)
.Select(f => new LogExport.ZipItem(f,
Path.GetRelativePath(root.FullName, f.FullName).Replace('\\', '/')))
.ToList();
if (attachedFiles.Count > 0)
{
attachments.Add(new SendEmailDto.AttachmentsDto
{
FileName = $"immagini_allegate_{DateTime.Today:yyyyMMdd}.zip",
FileContent = CreateZipBytes(attachedInfo.FullName, attachedFiles)
});
}
return attachments;
}
private static List<FileInfo>? RetrieveLogFile()
{
var appDataPath = FileSystem.AppDataDirectory;
var targetDirectory = Path.Combine(appDataPath, "logs");
var directory = new DirectoryInfo(targetDirectory);
List<FileInfo>? files = null;
if (directory.Exists)
files = directory.GetFiles().ToList();
return files;
}
private SendEmailDto.AttachmentsDto? CreateDatabaseZipAttachment()
{
var files = new[]
{
new FileInfo(dbPathProvider.GetDbPath())
};
// Filtra solo quelli esistenti
var existingFiles = files.Where(f => f.Exists).ToList();
if (existingFiles.Count == 0)
return null;
using var memoryStream = new MemoryStream();
using (var archive = new ZipArchive(memoryStream, ZipArchiveMode.Create, true))
{
foreach (var file in existingFiles)
{
var entry = archive.CreateEntry(file.Name, CompressionLevel.Optimal);
using var entryStream = entry.Open();
using var fileStream = file.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
fileStream.CopyTo(entryStream);
}
}
return new SendEmailDto.AttachmentsDto
{
FileName = $"database_{DateTime.Now:yyyyMMdd_HHmm}.zip",
FileContent = memoryStream.ToArray()
};
}
private static byte[] CreateZipBytes(IEnumerable<FileInfo> files)
{
using var ms = new MemoryStream();
using (var archive = new ZipArchive(ms, ZipArchiveMode.Create, leaveOpen: true))
{
foreach (var file in files)
{
if (!file.Exists)
continue;
// Nome dentro lo zip (evita path e collisioni minime)
var entryName = file.Name;
var entry = archive.CreateEntry(entryName, CompressionLevel.Optimal);
using var entryStream = entry.Open();
using var fileStream = file.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
fileStream.CopyTo(entryStream);
}
}
return ms.ToArray();
}
private static byte[] CreateZipBytes(string rootDir, IEnumerable<FileInfo> files)
{
using var ms = new MemoryStream();
using (var archive = new ZipArchive(ms, ZipArchiveMode.Create, leaveOpen: true))
{
foreach (var file in files)
{
if (!file.Exists)
continue;
// Path relativo rispetto a rootDir -> mantiene le directory nello zip
var relativePath = Path.GetRelativePath(rootDir, file.FullName);
// Zip usa "/" come separatore: normalizziamo per compatibilità
var entryName = relativePath.Replace('\\', '/');
var entry = archive.CreateEntry(entryName, CompressionLevel.Optimal);
using var entryStream = entry.Open();
using var fileStream = file.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
fileStream.CopyTo(entryStream);
}
}
return ms.ToArray();
}
}
}
+171
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@@ -0,0 +1,171 @@
using System.IO.Compression;
using Microsoft.Extensions.Logging;
using SteUp.Shared.Core.Dto;
using SteUp.Shared.Core.Interface.System;
namespace SteUp.Maui.Core.Services;
/// <summary>
/// Divide l'invio dei log in parti sotto <see cref="MaxPartBytes"/>: la prima porta log, database
/// e le prime immagini, le successive solo immagini. Gli zip vengono scritti su disco (mai in RAM)
/// una parte alla volta, così lo spazio occupato resta quello di una sola parte.
/// </summary>
internal sealed class LogExport : ILogExport
{
// Ben sotto il max-file-size dei servizi (100 MB) e i limiti tipici dei server di posta.
// Una parte piccola regge anche l'upload da rete mobile entro il timeout HTTP del client.
internal const long MaxPartBytes = 40L * 1024 * 1024;
private const int BufferSize = 81920;
internal readonly record struct ZipItem(FileInfo File, string EntryName);
private readonly string _workDir;
private readonly List<ZipItem> _logFiles;
private readonly List<ZipItem> _dbFiles;
private readonly List<List<ZipItem>> _imageParts;
private readonly ILogger _logger;
private readonly List<string> _currentPartFiles = [];
public int PartCount => _imageParts.Count;
internal LogExport(string workDir, List<ZipItem> logFiles, List<ZipItem> dbFiles, List<ZipItem> images,
ILogger logger)
{
_workDir = workDir;
_logFiles = logFiles;
_dbFiles = dbFiles;
_logger = logger;
_imageParts = SplitImages(images, logFiles.Concat(dbFiles).Sum(x => x.File.Length));
}
/// <summary>
/// Riempie le parti in ordine (le foto di un'ispezione restano vicine). La prima parte parte
/// già occupata da log e database: uso le dimensioni non compresse, una stima per eccesso.
/// Un file più grande di una parte finisce da solo in una parte sua.
/// </summary>
private static List<List<ZipItem>> SplitImages(List<ZipItem> images, long firstPartReserved)
{
var parts = new List<List<ZipItem>> { new() };
var currentSize = firstPartReserved;
foreach (var image in images)
{
var length = image.File.Length;
if (currentSize > 0 && currentSize + length > MaxPartBytes)
{
parts.Add([]);
currentSize = 0;
}
parts[^1].Add(image);
currentSize += length;
}
return parts;
}
public Task<List<SendEmailDto.AttachmentsDto>> BuildPartAsync(int index, CancellationToken ct = default)
{
ArgumentOutOfRangeException.ThrowIfNegative(index);
ArgumentOutOfRangeException.ThrowIfGreaterThanOrEqual(index, PartCount);
// Task.Run: la compressione non deve bloccare il thread della UI.
return Task.Run(() =>
{
DeleteCurrentPartFiles();
var attachments = new List<SendEmailDto.AttachmentsDto>();
var date = DateTime.Today.ToString("yyyyMMdd");
if (index == 0)
{
if (_logFiles.Count > 0)
attachments.Add(WriteZip($"logs_{date}.zip", _logFiles, CompressionLevel.Optimal, ct));
if (_dbFiles.Count > 0)
attachments.Add(WriteZip($"database_{DateTime.Now:yyyyMMdd_HHmm}.zip", _dbFiles,
CompressionLevel.Optimal, ct));
}
var images = _imageParts[index];
if (images.Count > 0)
{
var suffix = PartCount > 1 ? $"_parte{index + 1}di{PartCount}" : string.Empty;
// JPEG già compressi: ricomprimerli costa CPU e non riduce quasi niente.
attachments.Add(WriteZip($"immagini_allegate_{date}{suffix}.zip", images,
CompressionLevel.NoCompression, ct));
}
return attachments;
}, ct);
}
private SendEmailDto.AttachmentsDto WriteZip(string fileName, List<ZipItem> items, CompressionLevel level,
CancellationToken ct)
{
var path = Path.Combine(_workDir, fileName);
_currentPartFiles.Add(path);
using (var zipStream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None, BufferSize))
using (var archive = new ZipArchive(zipStream, ZipArchiveMode.Create))
{
foreach (var item in items)
{
ct.ThrowIfCancellationRequested();
try
{
// FileShare.ReadWrite: log e database possono essere ancora aperti in scrittura.
using var source = item.File.Open(FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
var entry = archive.CreateEntry(item.EntryName, level);
entry.LastWriteTime = item.File.LastWriteTime;
using var entryStream = entry.Open();
source.CopyTo(entryStream, BufferSize);
}
catch (Exception e) when (e is IOException or UnauthorizedAccessException)
{
// Un file sparito o bloccato non deve far saltare tutto l'invio.
_logger.LogWarning(e, "Export log: file {File} saltato", item.File.FullName);
}
}
}
return new SendEmailDto.AttachmentsDto { FileName = fileName, FilePath = path };
}
private void DeleteCurrentPartFiles()
{
foreach (var path in _currentPartFiles)
{
try
{
File.Delete(path);
}
catch (Exception e)
{
_logger.LogWarning(e, "Export log: impossibile eliminare {File}", path);
}
}
_currentPartFiles.Clear();
}
public ValueTask DisposeAsync()
{
try
{
if (Directory.Exists(_workDir))
Directory.Delete(_workDir, true);
}
catch (Exception e)
{
_logger.LogWarning(e, "Export log: impossibile eliminare {Dir}", _workDir);
}
return ValueTask.CompletedTask;
}
}