public IEnumerable <PortalModel> FindLinkablePortals(Faction faction, KeyInventoryModel inventory, PortalModel source)
{
string message;
if (!IsLinkableSource(faction, source, out message))
{
Debug.Log(message);
return(Enumerable.Empty <PortalModel>());
}
var candidatePortals = portals.Where(p => IsLinkableTarget(faction, inventory, source, p, out message)).ToList();
candidatePortals.Sort((a, b) => a.DistanceFrom(source.Position).CompareTo(b.DistanceFrom(source.Position)));
return(candidatePortals);
}
public LinkModel AddLink(Faction faction, KeyInventoryModel inventory, PortalModel source, PortalModel target)
{
string message;
if (IsLinkableSource(faction, source, out message) && IsLinkableTarget(faction, inventory, source, target, out message))
{
LinkModel newLink = new LinkModel(source, target);
links.Add(newLink);
source.NumberOfLinks++;
target.NumberOfLinks++;
return(newLink);
}
else
{
throw new Exception(message);
}
}
public bool IsLinkableTarget(Faction faction, KeyInventoryModel inventory, PortalModel source, PortalModel target, out string message)
{
if (source == target)
{
message = string.Format("Source portal {0} is also the target portal.", source);
return(false);
}
if (target.Faction != faction)
{
message = string.Format("Target portal {0} is an enemy portal.", target);
return(false);
}
if (!inventory.HasKey(target))
{
message = string.Format("No key for target portal {0}.", target);
return(false);
}
if (links.Any(link => link.Overlaps(target)))
{
message = string.Format("Target portal {0} is overlapped by a link.", target);
return(false);
}
LinkModel newLink = new LinkModel(source, target);
if (links.Any(link => link.EqualsIgnoreDirection(newLink)))
{
message = string.Format("Link already exists between portal {0} and {1}.", source, target);
return(false);
}
if (links.Any(link => link.Intersects(newLink)))
{
message = "Link crosses an existing link.";
return(false);
}
message = "";
return(true);
}