/// <summary>
/// Determines if the player has a free perk slot available
/// </summary>
public static bool HasFreeSlot(Player player)
{
if (!PerkTable.ContainsKey(player))
{
return(true);
}
return(PerkTable[player].Item1 is Empty || PerkTable[player].Item2 is Empty);
}
/// <summary>
/// Determines if the player has the specified perk
/// </summary>
public static bool HasPerk(Player player, Perk perk)
{
if (!PerkTable.ContainsKey(player) || perk == null || perk is Empty)
{
return(false);
}
return(PerkTable[player].Item1.GetType() == perk.GetType() || (PerkTable[player].Item2.GetType() == perk.GetType()));
}
/// <summary>
/// Returns the set of perks belonging to the specified player
/// </summary>
public static Tuple <Perk, Perk> GetPerks(Player player)
{
if (!PerkTable.ContainsKey(player))
{
return(Tuple.Create <Perk, Perk>(Empty, Empty));
}
return(PerkTable[player]);
}
/// <summary>
/// Sets the player perk at the chosen position
/// </summary>
/// <returns>true if the perk could be assigned, false if the perk tree is full and overwriteExisting is false</returns>
public static bool Set(Player player, Perk perk, PerkPosition position, bool overwriteExisting)
{
if (perk == null || !HasFreeSlot(player) || HasPerk(player, perk))
{
return(false);
}
if (!PerkTable.ContainsKey(player))
{
PerkTable[player] = Tuple.Create <Perk, Perk>(Perk.Empty, Perk.Empty);
}
if (!overwriteExisting)
{
if (position == PerkPosition.Primary && !(PerkTable[player].Item1 is Empty))
{
position = PerkPosition.Secondary;
}
if (position == PerkPosition.Secondary && !(PerkTable[player].Item2 is Empty))
{
if (PerkTable[player].Item1 is Empty)
{
position = PerkPosition.Primary;
}
else
{
return(false);
}
}
}
switch (position)
{
case PerkPosition.Primary:
PerkTable[player] = Tuple.Create <Perk, Perk>(perk, PerkTable[player].Item2);
break;
case PerkPosition.Secondary:
PerkTable[player] = Tuple.Create <Perk, Perk>(PerkTable[player].Item1, perk);
break;
}
return(true);
}
/// <summary>
/// Gets a perk by type for a specific player
/// </summary>
/// <returns>instance of the <code>Perk</code> or <code>null</code> if the player does not have the type of Perk</returns>
/// <typeparam name="T"><code>Perk</code> to retrieve from the player</typeparam>
public static T GetByType <T>(Player player) where T : Perk
{
T perk = default(T);
if (!PerkTable.ContainsKey(player))
{
return(perk);
}
if (PerkTable[player].Item1 is T)
{
perk = (T)(object)PerkTable[player].Item1;
}
else if (PerkTable[player].Item2 is T)
{
perk = (T)(object)PerkTable[player].Item2;
}
return(perk);
}
/// <summary>
/// Gets a perk of the same type as given for the specified player
/// </summary>
/// <param name="player">the player to lookup</param>
/// <param name="perk">the perk type to match</param>
/// <returns>instance of the perk or null if the player does not have that perk</returns>
public static Perk Get(Player player, Perk perk)
{
Perk res = null;
if (!PerkTable.ContainsKey(player) || !HasPerk(player, perk))
{
return(res);
}
if (PerkTable[player].Item1.GetType() == perk.GetType())
{
res = PerkTable[player].Item1;
}
else if (PerkTable[player].Item2.GetType() == perk.GetType())
{
res = PerkTable[player].Item2;
}
return(res);
}
/// <summary>
/// Removes the perk at the given position
/// </summary>
public static void Remove(Player player, PerkPosition position)
{
if (!PerkTable.ContainsKey(player))
{
return;
}
switch (position)
{
case PerkPosition.Primary:
PerkTable[player] = Tuple.Create <Perk, Perk>(Empty, PerkTable[player].Item2);
break;
case PerkPosition.Secondary:
PerkTable[player] = Tuple.Create <Perk, Perk>(PerkTable[player].Item1, Empty);
break;
}
if (PerkTable[player].Item1 is Empty && PerkTable[player].Item2 is Empty)
{
PerkTable.Remove(player);
}
}
