// Calls the block on every attachment dictionary. The block can return a different dictionary,
// which will be replaced in the rev's properties. If it returns nil, the operation aborts.
// Returns YES if any changes were made.
public virtual bool MutateAttachments(CollectionUtils.Functor<IDictionary<string,
object>, IDictionary<string, object>> functor)
{
{
IDictionary<string, object> properties = GetProperties();
IDictionary<string, object> editedProperties = null;
IDictionary<string, object> attachments = (IDictionary<string, object>)properties
.Get("_attachments");
IDictionary<string, object> editedAttachments = null;
foreach (string name in attachments.Keys)
{
IDictionary<string, object> attachment = (IDictionary<string, object>)attachments
.Get(name);
IDictionary<string, object> editedAttachment = functor.Invoke(attachment);
if (editedAttachment == null)
{
return false;
}
// block canceled
if (editedAttachment != attachment)
{
if (editedProperties == null)
{
// Make the document properties and _attachments dictionary mutable:
editedProperties = new Dictionary<string, object>(properties);
editedAttachments = new Dictionary<string, object>(attachments);
editedProperties.Put("_attachments", editedAttachments);
}
editedAttachments.Put(name, editedAttachment);
}
}
if (editedProperties != null)
{
SetProperties(editedProperties);
return true;
}
return false;
}
}
