public async Task <ImageFileIdentity> AddImage(Stream imageFileStream, FileName imageFileName, FileFormat fileFormat)
{
var imageFileIdentity = ImageFileIdentity.New();
// Get unique file-name from image file identity.
var uniqueImageFileName = imageFileIdentity.GetUniqueFileName();
// Get the storage file path of the image file, using a single directory path and a globally-unique file name.
var uniqueImageFilePath = this.GetUniqueImageFilePath(uniqueImageFileName);
// Write the image file from its input stream to its unique local file path.
using (var file = File.Open(uniqueImageFilePath.Value, FileMode.CreateNew)) // Throw an exception if the file already exists by using create-new.
{
await imageFileStream.CopyToAsync(file);
}
// Add the file info to the repository.
var fileIdentity = imageFileIdentity.GetFileIdentity();
var fileInfo = new FileInfoAppType()
{
FileIdentity = fileIdentity,
FilePath = uniqueImageFilePath,
FileFormat = fileFormat,
};
await this.LocalFileInfoRepository.Add(fileInfo);
// Now add the unique file-name to original file-name mapping.
await this.OriginalFileNameMappingRepository.Add(uniqueImageFileName, imageFileName);
// Return the image file identity.
return(imageFileIdentity);
}
public async Task AddImageFile(AnomalyIdentity anomalyIdentity, ImageFileIdentity imageFileIdentity)
{
await this.ExecuteInContextAsync(async dbContext =>
{
var anomalyID = await dbContext.GetAnomaly(anomalyIdentity).Select(x => x.ID).SingleAsync();
// Acquire the AnomalyToImageFileMapping (since there currently can only be one image per anomaly).
var anomalyToImageFileMappingEntity = await dbContext.AnomalyToImageFileMappings.Where(x => x.AnomalyID == anomalyID).SingleOrDefaultAsync();
var existsAlready = anomalyToImageFileMappingEntity is object;
if (existsAlready)
{
anomalyToImageFileMappingEntity.ImageFileGUID = imageFileIdentity.Value;
}
else
{
anomalyToImageFileMappingEntity = new Entities.AnomalyToImageFileMapping()
{
AnomalyID = anomalyID,
ImageFileGUID = imageFileIdentity.Value,
};
dbContext.AnomalyToImageFileMappings.Add(anomalyToImageFileMappingEntity);
}
await dbContext.SaveChangesAsync();
});
}
public Task <Dictionary <AnomalyIdentity, List <ImageFileIdentity> > > GetImageFilesForAnomalies(IEnumerable <AnomalyIdentity> anomalyIdentities)
{
return(this.ExecuteInContext(async dbContext =>
{
var anomalyGuids = anomalyIdentities.Select(x => x.Value).ToList();
var query = from anomaly in dbContext.Anomalies
where anomalyGuids.Contains(anomaly.GUID)
join anomalyImage in dbContext.AnomalyToImageFileMappings
on anomaly.ID equals anomalyImage.AnomalyID into imageGroup
from i in imageGroup.DefaultIfEmpty()
select new
{
anomaly.GUID,
ImageIdentity = i == default ? Guid.Empty : i.ImageFileGUID,
};
var result = await query.ToListAsync();
// Group it by anomaly (since we need an AnomalyInfo per AnomalyIdentity passed in)
var grouped = result.GroupBy(
x => AnomalyIdentity.From(x.GUID),
x => ImageFileIdentity.From(x.ImageIdentity));
var output = grouped.ToDictionary(
grouping => grouping.Key,
grouping => grouping
.Where(x => !x.IsEmpty())
.ToList());
return output;
}));
}
private FilePath GetUniqueImageFilePath(ImageFileIdentity imageFileIdentity)
{
var uniqueImageFileName = imageFileIdentity.GetUniqueFileName();
var uniqueImageFilePath = this.GetUniqueImageFilePath(uniqueImageFileName);
return(uniqueImageFilePath);
}
public async Task <FileFormat> GetImageFileFormat(ImageFileIdentity imageFileIdentity)
{
var fileIdentity = imageFileIdentity.GetFileIdentity();
var fileFormat = await this.LocalFileInfoRepository.GetFileFormat(fileIdentity);
return(fileFormat);
}
public static FileName GetUniqueFileName(this ImageFileIdentity imageFileIdentity)
{
var uniqueFileNameValue = imageFileIdentity.GetUniqueFileNameValue();
var uniqueFileName = FileName.New(uniqueFileNameValue);
return(uniqueFileName);
}
public async Task <bool> Exists(ImageFileIdentity imageFileIdentity)
{
var fileIdentity = imageFileIdentity.GetFileIdentity();
var exists = await this.LocalFileInfoRepository.Exists(fileIdentity);
return(exists);
}
/// <summary>
/// This, in context, means the original image file name.
/// </summary>
public async Task <FileName> GetImageFileName(ImageFileIdentity imageFileIdentity)
{
// Can get the unique image file-name directly from the image file identity.
var uniqueImageFileName = imageFileIdentity.GetUniqueFileName();
var originalImageFileName = await this.OriginalFileNameMappingRepository.GetOriginalImageFileName(uniqueImageFileName);
return(originalImageFileName);
}
public async Task SetImageData(ImageFileIdentity imageFileIdentity, Stream imageFileStream)
{
var uniqueImageFilePath = this.GetUniqueImageFilePath(imageFileIdentity);
// Overwrite.
using (var file = File.OpenWrite(uniqueImageFilePath.Value))
{
await imageFileStream.CopyToAsync(file);
}
}
public async Task <List <ImageFileIdentity> > GetImageFiles(AnomalyIdentity anomalyIdentity)
{
var imageFileIdentities = await this.ExecuteInContextAsync(async dbContext =>
{
var imageFileGuids = dbContext.AnomalyToImageFileMappings.Where(x => x.Anomaly.GUID == anomalyIdentity.Value).Select(x => x.ImageFileGUID);
var output = await imageFileGuids.Select(x => ImageFileIdentity.From(x)).ToListAsync(); // Execute now.
return(output);
});
return(imageFileIdentities);
}
public Task <Stream> GetImageFileStream(ImageFileIdentity imageFileIdentity)
{
var uniqueImageFilePath = this.GetUniqueImageFilePath(imageFileIdentity);
// For times when the file doesn't exist (particularly common in dev, but happens in prod too)
// return a null stream. And hope for the best from there.
if (!File.Exists(uniqueImageFilePath.Value))
{
return(Task.FromResult <Stream>(Stream.Null));
}
var imageFileStream = File.OpenRead(uniqueImageFilePath.Value);
return(Task.FromResult <Stream>(imageFileStream));
}
public async Task <ImageFileReadInfo> GetReadInfo(ImageFileIdentity imageFileIdentity)
{
var getImageFileStream = this.GetImageFileStream(imageFileIdentity);
var getImageFileName = this.GetImageFileName(imageFileIdentity);
var getImageFileFormat = this.GetImageFileFormat(imageFileIdentity);
var imageFileStream = await getImageFileStream;
var originalImageFileName = await getImageFileName;
var imageFileFormat = await getImageFileFormat;
var readInfo = new ImageFileReadInfo()
{
Identity = imageFileIdentity,
Stream = imageFileStream,
FileName = originalImageFileName,
FileFormat = imageFileFormat,
};
return(readInfo);
}
public async Task Delete(ImageFileIdentity imageFileIdentity)
{
var uniqueImageFileName = imageFileIdentity.GetUniqueFileName();
var uniqueImageFilePath = this.GetUniqueImageFilePath(uniqueImageFileName);
// The multiple tasks are sequentially awaited to allow failures to preserve the sequence of events in case of failure.
// (The alternative would have been to Task.WhenAll() the various tasks, which would be simultaneous, but would lead to situations where things might get out of whack in case of failure.)
// Delete the image file.
await FileHelper.DeleteAsync(uniqueImageFilePath.Value);
// Remove the local file info.
var fileIdentity = imageFileIdentity.GetFileIdentity();
await this.LocalFileInfoRepository.Delete(fileIdentity);
// Delete the original image name mapping.
await this.OriginalFileNameMappingRepository.Delete(uniqueImageFileName);
}
public async Task <AnomalyInfo> GetAnomalyInfo(AnomalyIdentity anomalyIdentity)
{
var anomalyInfo = await this.ExecuteInContextAsync(async dbContext =>
{
var gettingAnomalyDetails = dbContext.GetAnomaly(anomalyIdentity)
.Select(x => new
{
x.ReportedUTC,
x.ReportedLocationGUID,
x.ReporterLocationGUID,
x.UpvotesCount,
})
.SingleAsync();
var gettingImageFileIdentityValues = dbContext.GetAnomaly(anomalyIdentity)
.Join(dbContext.AnomalyToImageFileMappings,
anomaly => anomaly.ID,
mapping => mapping.AnomalyID,
(_, mapping) => mapping.ImageFileGUID)
.ToListAsync();
var gettingTextItemIdentityValues = dbContext.GetAnomaly(anomalyIdentity)
.Join(dbContext.AnomalyToTextItemMappings,
anomaly => anomaly.ID,
mapping => mapping.AnomalyID,
(_, mapping) => mapping.TextItemGUID)
.ToListAsync();
var gettingCatchmentMapping = dbContext.GetAnomaly(anomalyIdentity)
.Join(dbContext.AnomalyToCatchmentMappings,
anomaly => anomaly.ID,
mapping => mapping.AnomalyID,
(_, mapping) => mapping)
.ToListAsync();
var anomalyDetails = await gettingAnomalyDetails;
var imageFileIdentityValues = await gettingImageFileIdentityValues;
var textItemIdentityValues = await gettingTextItemIdentityValues;
var catchmentMapping = await gettingCatchmentMapping;
var catchmentIdentities = catchmentMapping.Select(x => CatchmentIdentity.From(x.CatchmentIdentity)).ToList();
var imageFileIdentities = imageFileIdentityValues.Select(x => ImageFileIdentity.From(x)).ToList();
var reportedLocation = anomalyDetails.ReportedLocationGUID.HasValue ? LocationIdentity.From(anomalyDetails.ReportedLocationGUID.Value) : null;
var reporterLocation = anomalyDetails.ReporterLocationGUID.HasValue ? LocationIdentity.From(anomalyDetails.ReporterLocationGUID.Value) : null;
var reportedUTC = anomalyDetails.ReportedUTC;
var textItems = textItemIdentityValues.Select(x => TextItemIdentity.From(x)).ToList();
var upvotesCount = anomalyDetails.UpvotesCount;
var output = new AnomalyInfo()
{
AnomalyIdentity = anomalyIdentity,
CatchmentIdentities = catchmentIdentities,
ImageFileIdentities = imageFileIdentities,
ReportedLocationIdentity = reportedLocation,
ReporterLocationIdentity = reporterLocation,
ReportedUTC = reportedUTC,
TextItemsIdentities = textItems,
UpvotesCount = upvotesCount,
};
return(output);
});
return(anomalyInfo);
}
public static string GetUniqueFileNameValue(this ImageFileIdentity imageFileIdentity)
{
var uniqueFileNameValue = imageFileIdentity.Value.ToStringStandard();
return(uniqueFileNameValue);
}
public static FileIdentity GetFileIdentity(this ImageFileIdentity imageFileIdentity)
{
var fileIdentity = FileIdentity.New(imageFileIdentity.Value);
return(fileIdentity);
}
public async Task <List <AnomalyInfo> > GetAnomalyInfos(List <AnomalyIdentity> anomalyIdentities)
{
var anomalyGuids = anomalyIdentities.Select(x => x.Value).ToList();
var output = await this.ExecuteInContextAsync(async dbContext =>
{
// Get all the info, in rows.
var query =
from anomaly in dbContext.Anomalies
where anomaly.GUID != null
where anomalyGuids.Contains(anomaly.GUID)
join anomalyCatchment in dbContext.AnomalyToCatchmentMappings
on anomaly.ID equals anomalyCatchment.AnomalyID into catchmentGroup
from c in catchmentGroup.DefaultIfEmpty()
join anomalyText in dbContext.AnomalyToTextItemMappings
on anomaly.ID equals anomalyText.AnomalyID into textGroup
from t in textGroup.DefaultIfEmpty()
join anomalyImage in dbContext.AnomalyToImageFileMappings
on anomaly.ID equals anomalyImage.AnomalyID into imageGroup
from i in imageGroup.DefaultIfEmpty()
select new
{
anomaly.ID,
anomaly.GUID,
anomaly.ReportedUTC,
anomaly.ReportedLocationGUID,
anomaly.ReporterLocationGUID,
CatchmentIdentity = c == default ? Guid.Empty : c.CatchmentIdentity,
TextItemIdentity = t == default ? Guid.Empty : t.TextItemGUID,
ImageIdentity = i == default ? Guid.Empty : i.ImageFileGUID,
};
// Group it by anomaly (since we need an AnomalyInfo per AnomalyIdentity passed in)
var result = await query.ToListAsync();
var grouped = result.GroupBy(group =>
new {
group.ID,
group.GUID,
group.ReportedUTC,
group.ReportedLocationGUID,
group.ReporterLocationGUID
}, group => group);
// Use the grouping to put together anomaly infos.
var anomalyInfos = new List <AnomalyInfo>();
foreach (var entry in grouped)
{
// Console.WriteLine(entry.Key);
var images = new HashSet <Guid>();
var catchments = new HashSet <Guid>();
var textItemSet = new HashSet <Guid>();
foreach (var thing in entry)
{
images.Add(thing.ImageIdentity);
catchments.Add(thing.CatchmentIdentity);
textItemSet.Add(thing.TextItemIdentity);
}
var imagesList = images.ToList();
var catchmentsList = catchments.ToList();
var textItemsList = textItemSet.ToList();
// Console.WriteLine($" Images ({images.Count}): {string.Join(',',images.ToList())}");
// Console.WriteLine($" Catchments ({catchments.Count}): {string.Join(',', catchments.ToList())}");
// Console.WriteLine($" Text items ({textItemSet.Count}): {string.Join(',', textItemSet.ToList())}");
if (entry.Key.GUID == default)
{
// Unfortunately this also catches anomalies added with an all-zeros guid...
// and we have at least one of those (ID 228 as of 2020-07-17)
// throw new Exception("Got an anomaly without a GUID");
}
var anomalyIdentity = new AnomalyIdentity(entry.Key.GUID);
var reportedUTC = entry.Key.ReportedUTC;
var reportedLocation = entry.Key.ReportedLocationGUID.HasValue ? LocationIdentity.From(entry.Key.ReportedLocationGUID.Value) : null;
var reporterLocation = entry.Key.ReporterLocationGUID.HasValue ? LocationIdentity.From(entry.Key.ReporterLocationGUID.Value) : null;
var catchmentIdentities = catchmentsList.Select(x => CatchmentIdentity.From(x)).ToList();
var imageFileIdentities = imagesList
.Where(x => x != Guid.Empty)
.Select(x => ImageFileIdentity.From(x))
.ToList();
var textItems = textItemsList.Select(x => TextItemIdentity.From(x)).ToList();
var info = new AnomalyInfo
{
AnomalyIdentity = anomalyIdentity,
ReportedUTC = reportedUTC,
ReportedLocationIdentity = reportedLocation,
ReporterLocationIdentity = reporterLocation,
CatchmentIdentities = catchmentIdentities,
ImageFileIdentities = imageFileIdentities,
TextItemsIdentities = textItems
};
anomalyInfos.Add(info);
}
return(anomalyInfos);
});
return(output);
}
