move provider project towards portability

1 files changed, 169 insertions, 0 deletions

diff --git a/Emby.Photos/PhotoProvider.cs b/Emby.Photos/PhotoProvider.cs
new file mode 100644
index 000000000..aa9b36f17
--- /dev/null
+++ b/Emby.Photos/PhotoProvider.cs
@@ -0,0 +1,169 @@
+using System;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.Providers;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.Logging;
+using TagLib;
+using TagLib.IFD;
+using TagLib.IFD.Entries;
+using TagLib.IFD.Tags;
+
+namespace Emby.Photos
+{
+    public class PhotoProvider : ICustomMetadataProvider<Photo>, IHasItemChangeMonitor, IForcedProvider
+    {
+        private readonly ILogger _logger;
+
+        public PhotoProvider(ILogger logger)
+        {
+            _logger = logger;
+        }
+
+        public Task<ItemUpdateType> FetchAsync(Photo item, MetadataRefreshOptions options, CancellationToken cancellationToken)
+        {
+            item.SetImagePath(ImageType.Primary, item.Path);
+
+            // Examples: https://github.com/mono/taglib-sharp/blob/a5f6949a53d09ce63ee7495580d6802921a21f14/tests/fixtures/TagLib.Tests.Images/NullOrientationTest.cs
+
+            try
+            {
+                using (var file = TagLib.File.Create(item.Path))
+                {
+                    var image = file as TagLib.Image.File;
+
+                    var tag = file.GetTag(TagTypes.TiffIFD) as IFDTag;
+
+                    if (tag != null)
+                    {
+                        var structure = tag.Structure;
+
+                        if (structure != null)
+                        {
+                            var exif = structure.GetEntry(0, (ushort)IFDEntryTag.ExifIFD) as SubIFDEntry;
+
+                            if (exif != null)
+                            {
+                                var exifStructure = exif.Structure;
+
+                                if (exifStructure != null)
+                                {
+                                    var entry = exifStructure.GetEntry(0, (ushort)ExifEntryTag.ApertureValue) as RationalIFDEntry;
+
+                                    if (entry != null)
+                                    {
+                                        double val = entry.Value.Numerator;
+                                        val /= entry.Value.Denominator;
+                                        item.Aperture = val;
+                                    }
+
+                                    entry = exifStructure.GetEntry(0, (ushort)ExifEntryTag.ShutterSpeedValue) as RationalIFDEntry;
+
+                                    if (entry != null)
+                                    {
+                                        double val = entry.Value.Numerator;
+                                        val /= entry.Value.Denominator;
+                                        item.ShutterSpeed = val;
+                                    }
+                                }
+                            }
+                        }
+                    }
+
+                    item.CameraMake = image.ImageTag.Make;
+                    item.CameraModel = image.ImageTag.Model;
+
+                    item.Width = image.Properties.PhotoWidth;
+                    item.Height = image.Properties.PhotoHeight;
+
+                    var rating = image.ImageTag.Rating;
+                    if (rating.HasValue)
+                    {
+                        item.CommunityRating = rating;
+                    }
+                    else
+                    {
+                        item.CommunityRating = null;
+                    }
+
+                    item.Overview = image.ImageTag.Comment;
+
+                    if (!string.IsNullOrWhiteSpace(image.ImageTag.Title))
+                    {
+                        item.Name = image.ImageTag.Title;
+                    }
+
+                    var dateTaken = image.ImageTag.DateTime;
+                    if (dateTaken.HasValue)
+                    {
+                        item.DateCreated = dateTaken.Value;
+                        item.PremiereDate = dateTaken.Value;
+                        item.ProductionYear = dateTaken.Value.Year;
+                    }
+
+                    item.Genres = image.ImageTag.Genres.ToList();
+                    item.Tags = image.ImageTag.Keywords.ToList();
+                    item.Software = image.ImageTag.Software;
+
+                    if (image.ImageTag.Orientation == TagLib.Image.ImageOrientation.None)
+                    {
+                        item.Orientation = null;
+                    }
+                    else
+                    {
+                        MediaBrowser.Model.Drawing.ImageOrientation orientation;
+                        if (Enum.TryParse(image.ImageTag.Orientation.ToString(), true, out orientation))
+                        {
+                            item.Orientation = orientation;
+                        }
+                    }
+
+                    item.ExposureTime = image.ImageTag.ExposureTime;
+                    item.FocalLength = image.ImageTag.FocalLength;
+
+                    item.Latitude = image.ImageTag.Latitude;
+                    item.Longitude = image.ImageTag.Longitude;
+                    item.Altitude = image.ImageTag.Altitude;
+
+                    if (image.ImageTag.ISOSpeedRatings.HasValue)
+                    {
+                        item.IsoSpeedRating = Convert.ToInt32(image.ImageTag.ISOSpeedRatings.Value);
+                    }
+                    else
+                    {
+                        item.IsoSpeedRating = null;
+                    }
+                }
+            }
+            catch (Exception e)
+            {
+                _logger.ErrorException("Image Provider - Error reading image tag for {0}", e, item.Path);
+            }
+
+            const ItemUpdateType result = ItemUpdateType.ImageUpdate | ItemUpdateType.MetadataImport;
+            return Task.FromResult(result);
+        }
+
+        public string Name
+        {
+            get { return "Embedded Information"; }
+        }
+
+        public bool HasChanged(IHasMetadata item, IDirectoryService directoryService)
+        {
+            if (item.EnableRefreshOnDateModifiedChange && !string.IsNullOrWhiteSpace(item.Path) && item.LocationType == LocationType.FileSystem)
+            {
+                var file = directoryService.GetFile(item.Path);
+                if (file != null && file.LastWriteTimeUtc != item.DateModified)
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+    }
+}