public IEnumerable <ImageMeta> GetOlderImagesThan(CyanometerDataSource source, DateTimeOffset now)
{
string path = imagesFileManager.GetRelativePhysicalPathForDate(source, now);
var fileProvider = webHostEnvironment.WebRootFileProvider;
bool isToday = true;
logger.LogDebug($"Checking images for {fileProvider.GetFileInfo(Path.Combine("cyano", path)).PhysicalPath}");
var end = now.AddYears(-1);
while (now > end)
{
var content = fileProvider.GetDirectoryContents(Path.Combine("cyano", path));
string uriPath = GetRelativeUriPathForDate(source, now);
var images = imagesFileManager.ReadMetaForDate(source, content, uriPath, isToday);
foreach (var image in images.OrderByDescending(i => i.Date))
{
yield return(image);
}
now = now.AddDays(-1);
isToday = false;
path = imagesFileManager.GetRelativePhysicalPathForDate(source, now);
}
}
public void GivenSourceAndDate_ConstructsPathCorrectly()
{
var ljubljana = new CyanometerDataSource(Guid.NewGuid(), "Slovenia", "Ljubljana", AirQualitySource.Arso,
rootUriPath: "slovenia/ljubljana", cameraLocationPath: "Central-Square", "E21");
var actual = Target.GetRelativePhysicalPathForDate(ljubljana, new DateTimeOffset(2017, 8, 2, 5, 38, 36, TimeSpan.Zero));
Assert.That(actual, Is.EqualTo(Path.Combine("slovenia", "ljubljana", "Central-Square", "2017", "08", "02")));
}
internal ImageMeta CreateMetaFromSourceAndInfo(CyanometerDataSource source, ImageInfo info, string uriPath, string fileName)
{
return(new ImageMeta(
Url.Combine("/", WwwRoot, uriPath, $"{fileName}.jpg"),
Url.Combine("/", WwwRoot, uriPath, $"thumb-{fileName}.jpg"),
info.Date,
info.BluenessIndex
));
}
public void SaveImage(CyanometerDataSource source, string wwwRootDirectory, Image <Rgba32> image, Image <Rgba32> thumb, ImageInfo info, string fullName)
{
string directory = Path.Combine(wwwRootDirectory, WwwRoot, GetRelativePhysicalPathForDate(source, info.Date));
Directory.CreateDirectory(directory);
image.Save(Path.Combine(directory, fullName));
logger.LogDebug($"Image saved to {Path.Combine(directory, fullName)}");
string thumbnailName = CreateThumbnailFileName(fullName);
thumb.Save(Path.Combine(directory, thumbnailName));
logger.LogDebug($"Image saved to {Path.Combine(directory, thumbnailName)}");
string infoFileName = CreateInfoFileName(fullName);
File.WriteAllText(Path.Combine(directory, infoFileName), JsonConvert.SerializeObject(info));
logger.LogDebug($"Info saved to {Path.Combine(directory, infoFileName)}");
}
public ImmutableArray <ImageMeta> ReadMetaForDate(CyanometerDataSource source, IDirectoryContents content, string uriPath, bool current)
{
string key = $"{CacheKeys.ImageFile}_{uriPath}";
var result = cache.GetOrCreate(key, ce =>
{
logger.LogInformation("Missed cache on image files {key}", key);
var query = from f in content
let ext = Path.GetExtension(f.Name)
where string.Equals(ext, ".info", System.StringComparison.Ordinal)
let fn = Path.GetFileNameWithoutExtension(f.Name)
let i = ReadImageInfoFromInfoFile(f)
orderby i.Date descending
select CreateMetaFromSourceAndInfo(source, i, uriPath, fn);
ce.SetAbsoluteExpiration(current ? TimeSpan.FromMinutes(10) : TimeSpan.FromDays(1));
return(query.ToImmutableArray());
});
return(result);
}
public void SaveImage(CyanometerDataSource source, string fileName, Stream stream)
{
string safeFileName = Path.GetFileName(fileName);
DateTimeOffset takenAt = DateFromFileName(safeFileName);
logger.LogDebug($"File date is {takenAt}");
using (var image = Image.Load <Rgba32>(stream))
using (var thumb = image.Clone())
{
thumb.Mutate(x => x.Resize(800, 600));
var colors = CollectColors(thumb);
var info = new ImageInfo(
takenAt,
calculator.GetBluenessIndexTopPixels(colors, 30).Index
);
logger.LogDebug("Thumbnail created, saving");
var fileProvider = (PhysicalFileProvider)webHostEnvironment.WebRootFileProvider;
imagesFileManager.SaveImage(source, fileProvider.Root, image, thumb, info, safeFileName);
}
}
internal string GetRelativeUriPathForDate(CyanometerDataSource source, DateTimeOffset now)
{
return(Url.Combine(source.RootUriPath, source.CameraLocationPath,
now.Year.ToString("0000"), now.Month.ToString("00"), now.Day.ToString("00")));
}
public string GetRelativePhysicalPathForDate(CyanometerDataSource source, DateTimeOffset now)
{
return(Path.Combine(source.RootDiskPath, source.CameraLocationPath,
now.Year.ToString("0000"), now.Month.ToString("00"), now.Day.ToString("00")));
}
