private static int LinkParts(IDictionary <int, SchoolInfo> schools, IEnumerable <PartLink> links, IDictionary <int, BasePart> parts, HandlerParams prms)
{
if (parts.Count() == 0)
{
return(-1);
}
var count = 0;
prms.ForceLink |= prms.ForceRetrieve || links == null || !links.Any();
if (!prms.ForceLink && !prms.PrimaryKey)
{
var propInfo = typeof(SchoolInfo).GetProperty(prms.Name, BindingFlags.Public | BindingFlags.Instance);
var propLink = typeof(PartLink).GetProperty(prms.Name, BindingFlags.Public | BindingFlags.Instance);
if (!propInfo?.CanWrite ?? false || propLink == null)
{
return(-1);
}
foreach (var link in links)
{
SchoolInfo info;
if (!schools.TryGetValue(link.School, out info))
{
return(-1);
}
var id = propLink.GetValue(link) as int? ?? 0;
if (id == 0)
{
continue;
}
BasePart part;
if (!parts.TryGetValue(id, out part))
{
return(-1);
}
propInfo.SetValue(info, part, null);
count++;
}
}
else
{
count = prms.Handler.Link(schools, parts);
}
return(count);
}
private static void HandleParts <T>(IDictionary <int, SchoolInfo> schools, IEnumerable <PartLink> links, Storage storage, HandlerParams prms) where T : BasePart, new()
{
Logger.Info($"Retrieve \"{prms.Name}\" parts...", true);
var parts = RetrieveParts <T>(schools, links, storage, prms);
var action = prms.ForceRetrieve ? "Retrieved" : "Loaded";
Logger.Info($"{action} {parts.Count()} items.");
if (parts.Count() == 0)
{
Logger.Info($"Nothing to link.");
return;
}
Logger.Info($"Link \"{prms.Name}\" parts...", true);
var count = LinkParts(schools, links, parts.ToDictionary <BasePart>(), prms);
action = (count == -1 ? "ERROR: " : "") + (prms.ForceLink ? "Linked" : "Restored");
Logger.Info($"{action} {count} from {parts.Count()} items.");
}
private static IEnumerable <T> RetrieveParts <T>(IDictionary <int, SchoolInfo> schools, IEnumerable <PartLink> links, Storage storage, HandlerParams prms) where T : BasePart, new()
{
IEnumerable <T> parts = null;
if (!prms.ForceRetrieve)
{
parts = storage.Read <T>();
prms.ForceRetrieve = parts == null;
}
if (prms.ForceRetrieve)
{
parts = new List <T>(prms.Handler.Read(schools) as IEnumerable <T>);
if (prms.PrimaryKey)
{
storage.Clear(false);
}
storage.Write(parts);
}
return(parts);
}
private static void HandlePart(IDictionary <int, SchoolInfo> schools, IEnumerable <PartLink> links, Storage storage, HandlerParams item)
{
var type = typeof(Program);
var method = type.GetMethod("HandleParts", BindingFlags.NonPublic | BindingFlags.Static);
var generic = method.MakeGenericMethod(item.Handler.PartType);
generic.Invoke(null, new object[] { schools, links, storage, item });
}