/// <summary>
/// Retrieves the specified tag data as a byte array. This method does not attempt to read the tag data, it simply
/// reads the header and if present the tag bytes are read directly from the stream. This means that typical exceptions
/// that get thrown in a tag read will not occur in this method.
/// </summary>
/// <param name="version">The tag version number.</param>
/// <returns>A byte array of the tag data.</returns>
public byte[] GetTagBytes(Id3Version version)
{
Id3Handler handler = ExistingHandlers.FirstOrDefault(h => h.Version == version);
byte[] tagBytes = handler?.GetTagBytes(Stream);
return(tagBytes);
}
public Id3Tag GetTag(Id3Version version, out object additionalData)
{
Id3Handler handler = ExistingHandlers.FirstOrDefault(h => h.Version == version);
if (handler != null)
{
return(handler.ReadTag(Stream, out additionalData));
}
additionalData = null;
return(null);
}
public Id3Tag GetTag(Id3TagFamily family, out object additionalData)
{
Id3Handler familyHandler = ExistingHandlers.FirstOrDefault(handler => handler.Family == family);
if (familyHandler != null)
{
return(familyHandler.ReadTag(Stream, out additionalData));
}
additionalData = null;
return(null);
}
/// <summary>
/// Deletes the ID3 tag of the specified tag family type from the MP3 data.
/// </summary>
/// <param name="family">The ID3 tag family type.</param>
public void DeleteTag(Id3TagFamily family)
{
EnsureWritePermissions(Mp3Messages.NoWritePermissions_CannotDeleteTag);
Id3Handler foundHandler = ExistingHandlers.FirstOrDefault(handler => handler.Family == family);
if (foundHandler != null)
{
foundHandler.DeleteTag(Stream);
InvalidateExistingHandlers();
}
}
/// <summary>
/// Deletes the ID3 tag of the specified version from the MP3 data.
/// </summary>
/// <param name="version">The tag version</param>
public void DeleteTag(Id3Version version)
{
EnsureWritePermissions(Mp3Messages.NoWritePermissions_CannotDeleteTag);
Id3Handler handler = ExistingHandlers.FirstOrDefault(h => h.Version == version);
if (handler != null)
{
handler.DeleteTag(Stream);
InvalidateExistingHandlers();
}
}
public bool WriteTag(Id3Tag tag, WriteConflictAction conflictAction = WriteConflictAction.NoAction)
{
if (tag == null)
{
throw new ArgumentNullException(nameof(tag));
}
EnsureWritePermissions(Mp3Messages.NoWritePermissions_CannotWriteTag);
//If a tag already exists from the same family, but is a different version than the passed tag,
//delete it if conflictAction is Replace.
Id3Handler familyHandler = ExistingHandlers.FirstOrDefault(handler => handler.Family == tag.Family);
if (familyHandler != null)
{
Id3Handler handler = familyHandler;
if (handler.Version != tag.Version)
{
if (conflictAction == WriteConflictAction.NoAction)
{
return(false);
}
if (conflictAction == WriteConflictAction.Replace)
{
Id3Handler handlerCopy = handler; //TODO: Why did we need a copy of the handler?
handlerCopy.DeleteTag(Stream);
}
}
}
//Write the tag to the file. The handler will know how to overwrite itself.
Id3Handler writeHandler = Id3Handler.GetHandler(tag.Version);
bool writeSuccessful = writeHandler.WriteTag(Stream, tag);
if (writeSuccessful)
{
InvalidateExistingHandlers();
}
return(writeSuccessful);
}
/// <summary>
/// Retrieves an ID3 tag of the specified version number.
/// </summary>
/// <param name="version">The tag version number.</param>
/// <returns>The ID3 tag of the specified version number, or null if it doesn't exist.</returns>
public Id3Tag GetTag(Id3Version version)
{
Id3Handler handler = ExistingHandlers.FirstOrDefault(h => h.Version == version);
return(handler?.ReadTag(Stream, out _));
}
/// <summary>
/// Retrieves an ID3 tag of the specified tag family type - version 2.x or version 1.x.
/// </summary>
/// <param name="family">The ID3 tag family type required.</param>
/// <returns>The ID3 tag of the specified tag family type, or null if it doesn't exist.</returns>
public Id3Tag GetTag(Id3TagFamily family)
{
Id3Handler familyHandler = ExistingHandlers.FirstOrDefault(handler => handler.Family == family);
return(familyHandler?.ReadTag(Stream, out _));
}