public void Add(string filename, Models.Metadata image)
{
if (string.IsNullOrWhiteSpace(filename))
{
throw new ArgumentNullException(nameof(filename));
}
_logService.TraceEnter();
try
{
_logService.Trace("Checking if a date and caption have been specified...");
if (string.IsNullOrWhiteSpace(image.DateTaken) || string.IsNullOrWhiteSpace(image.Caption))
{
_logService.Trace(@"Either the date or caption has not been specified. Exiting...");
return;
}
_logService.Trace($@"Adding ""{filename}"" to dictionary of images with caches...");
_images[filename] = image;
}
finally
{
_logService.TraceExit();
}
}
public void Remove(string filename)
{
_logService.TraceEnter();
try
{
_logService.Trace($@"Checking if there is quick caption information for ""{filename}""...");
if (!_images.ContainsKey(filename))
{
_logService.Trace($@"There is no quick caption information for ""{filename}"". Exiting...");
return;
}
_logService.Trace($@"Removing quick caption information for ""{filename}""...");
_images.Remove(filename);
_logService.Trace($@"Checking if ""{filename}"" is the cached file...");
if (_cachedFilename != filename)
{
return;
}
_logService.Trace($@"""{filename}"" is the cached file. Removing...");
_cachedFilename = null;
_cachedImage = null;
}
finally
{
_logService.TraceExit();
}
}
public void Save(Models.Metadata metadata, string filename)
{
using (var logger = _logger.Block())
{
// validate that all of the properties have a value
if (metadata.AppendDateTakenToCaption == null)
{
throw new InvalidOperationException(@"""AppendDateTakenToCaption"" property value not specified");
}
if (metadata.BackgroundColour == null)
{
throw new InvalidOperationException(@"""BackgroundColour"" property value not specified");
}
if (metadata.CaptionAlignment == null)
{
throw new InvalidOperationException(@"""CaptionAlignment"" property value not specified");
}
if (metadata.Colour == null)
{
throw new InvalidOperationException(@"""Colour"" property value not specified");
}
if (metadata.FontBold == null)
{
throw new InvalidOperationException(@"""FontBold"" property value not specified");
}
if (metadata.FontSize == null)
{
throw new InvalidOperationException(@"""FontSize"" property value not specified");
}
if (metadata.ImageFormat == null)
{
throw new InvalidOperationException(@"""ImageFormat"" property value not specified");
}
if (metadata.Rotation == null)
{
throw new InvalidOperationException(@"""Rotation"" property value not specified");
}
logger.Trace($"Saving metadata for \"{filename}\"...");
// get the name of the metadata file
var metadataFilename = GetMetadataFilename(filename);
logger.Trace($@"Saving metadata to ""{metadataFilename}""...");
_xmlFileSerialiser.Serialise(metadata, metadataFilename);
}
}
public Models.Metadata Populate(Models.Metadata metadata)
{
using (var logger = _logger.Block())
{
logger.Trace("Populating any incomplete metadata values with defaults...");
metadata.AppendDateTakenToCaption = metadata.AppendDateTakenToCaption ?? false;
metadata.BackgroundColour = metadata.BackgroundColour ?? System.Drawing.Color.Transparent.ToArgb();
metadata.CaptionAlignment = metadata.CaptionAlignment ?? CaptionAlignments.BottomRight;
metadata.Colour = metadata.Colour ?? System.Drawing.Color.White.ToArgb();
metadata.FontBold = metadata.FontBold ?? false;
metadata.FontFamily = metadata.FontFamily ?? System.Drawing.SystemFonts.DefaultFont.SystemFontName;
metadata.FontSize = metadata.FontSize ?? 10;
metadata.FontType = metadata.FontType ?? "pts";
metadata.ImageFormat = metadata.ImageFormat ?? ImageFormat.Jpeg;
metadata.Rotation = metadata.Rotation ?? Rotations.Zero;
return(metadata);
}
}
public void Clear()
{
_logService.TraceEnter();
try
{
_logService.Trace("Clearing list...");
_cachedImage = null;
_images.Clear();
_logService.Trace($@"Notifying {_observers.Count} observers that list has been cleared...");
foreach (var observer in _observers)
{
observer.OnClear();
}
}
finally
{
_logService.TraceExit();
}
}
public void Switch(string filename, Models.Metadata image)
{
_logService.TraceEnter();
try
{
_logService.Trace("Checking if filename has changed...");
if (_cachedFilename == filename)
{
_logService.Trace("Filename has not changed. Exiting...");
return;
}
_logService.Trace("Caching filename...");
_cachedFilename = filename;
_cachedImage = image;
_logService.Trace($@"Building caption list for ""{filename}""...");
var captions = GetQuickCaptions();
_logService.Trace($"Notifying {_observers.Count} observers of {captions.Count} captions...");
foreach (var observer in _observers)
{
Notify(observer, captions);
}
}
catch (Exception ex)
{
_logService.Trace($@"Notifying {_observers.Count} observers of error...");
foreach (var observer in _observers)
{
observer.OnError(ex);
}
}
finally
{
_logService.TraceExit();
}
}