Suffix Binaries With Id

gistfile1.cs

[TcmTemplateTitle("SuffixBinariesWithId")]
public class SuffixBinariesWithId: ITemplate
{
    public void Transform(Engine engine, Package package)
    {
        string paramMimeTypesToMatch = package.GetValue("mimeTypesToMatch");
        // match all image types by default
        string mimeTypesToMatch = "image/*";
        if (!string.IsNullOrWhiteSpace(paramMimeTypesToMatch))
        {
            mimeTypesToMatch = paramMimeTypesToMatch;
        }
        foreach (var item in package.GetAllByType(new ContentType(mimeTypesToMatch)))
        {
            // Items with property filename are multimedia
            if (item.Properties.ContainsKey(Item.ItemPropertyTcmUri)
                && item.Properties.ContainsKey(Item.ItemPropertyFileName)
                && !item.Properties.ContainsKey(Item.ItemPropertyFileNameSuffix))
            {
                TcmUri uri = new TcmUri(item.Properties[Item.ItemPropertyTcmUri]);
                item.Properties[Item.ItemPropertyFileNameSuffix] = "_" + uri.ItemId.ToString();
            }
        }
    }
}