/// <summary>
/// Recursively through all fields in a form to find fields of type ExternalMediaField and
/// checks whether the media sources referred by them exist. Returns the list of URLs of media
/// sources that does not exist.
/// </summary>
/// <param name="model">The form or field.</param>
/// <returns></returns>
public List <string> CheckMedia(CFXmlModel model)
{
List <string> errorneousMedia = new List <string>();
if (typeof(Form).IsAssignableFrom(model.GetType()))
{
Form form = model as Form;
foreach (var child in form.Fields)
{
errorneousMedia.AddRange(CheckMedia(child));
}
}
else if (typeof(ExternalMediaField).IsAssignableFrom(model.GetType()))
{
if (!CheckMedia((model as ExternalMediaField).Source))
{
errorneousMedia.Add((model as ExternalMediaField).Source);
}
}
else if (typeof(CompositeFormField).IsAssignableFrom(model.GetType()))
{
CompositeFormField cfield = model as CompositeFormField;
foreach (var child in cfield.Header)
{
errorneousMedia.AddRange(CheckMedia(child));
}
foreach (var child in cfield.Fields)
{
errorneousMedia.AddRange(CheckMedia(child));
}
foreach (var child in cfield.Footer)
{
errorneousMedia.AddRange(CheckMedia(child));
}
}
return(errorneousMedia);
}
public CFDataFile GetFile(int id, string guid, bool checkInItems = true)
{
CFXmlModel model = Db.XmlModels.Find(id);
if (model is CFDataFile && model.Guid == guid)
{
return(model as CFDataFile);
}
if (checkInItems && model is CFItem)
{
return((model as CFItem).Files.Where(f => f.Guid == guid).FirstOrDefault());
}
if (typeof(AbstractForm).IsAssignableFrom(model.GetType()))
{
return((model as AbstractForm).Fields.SelectMany(m => m.Files).Where(m => m.DataFile.Guid == guid).FirstOrDefault().DataFile);
}
return(null);
}
