/// <summary>
/// Bury an element of an array of entities in Storage based on a NeoStorageKey (NPC Level 4)
/// </summary>
/// <param name="vau">vau</param>
/// <param name="index">index</param>
/// <returns>Point</returns>
public static Point BuryElement(NeoVersionedAppUser vau, int index)
{
if (NeoVersionedAppUser.IsNull(vau)) // TODO - create NeoEntityModel.EntityState.BADKEY?
{
return(Point.Null());
}
Neo.SmartContract.Framework.Services.Neo.StorageContext ctx = Neo.SmartContract.Framework.Services.Neo.Storage.CurrentContext;
NeoStorageKey nsk = NeoStorageKey.New(vau, "Point");
byte[] bkey;
Point p;
/*STA*/
byte[] bsta = Neo.SmartContract.Framework.Services.Neo.Storage.Get(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bSTA));
NeoTrace.Trace("Bury(vau,index).bs", bsta.Length, bsta);
if (bsta.Length == 0)
{
p = Point.Missing();
}
else // not MISSING - bury it
{
p = Point.Tombstone(); // TODO - should Bury() preserve the exist field values or re-initialize them? Preserve is cheaper but not as private
/*STA*/
Neo.SmartContract.Framework.Services.Neo.Storage.Put(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bSTA), p._state.AsBigInteger());
/*EXT*/
Neo.SmartContract.Framework.Services.Neo.Storage.Put(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bEXT), p._extension);
/*FIELD*/
Neo.SmartContract.Framework.Services.Neo.Storage.Put(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bX), p._x);
/*FIELD*/
Neo.SmartContract.Framework.Services.Neo.Storage.Put(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bY), p._y);
}
LogExt("Bury(vau,i).p", p);
return(p);
}
/// <summary>
/// Collectible methods (NPC Level 4)
/// </summary>
/// <param name="p">p</param>
/// <param name="vau">vau</param>
/// <param name="index">index</param>
/// <returns>bool</returns>
public static bool PutElement(Point p, NeoVersionedAppUser vau, int index)
{
if (NeoVersionedAppUser.IsNull(vau))
{
return(false);
}
Neo.SmartContract.Framework.Services.Neo.StorageContext ctx = Neo.SmartContract.Framework.Services.Neo.Storage.CurrentContext;
NeoStorageKey nsk = NeoStorageKey.New(vau, "Point");
byte[] bkey;
p._state = NeoEntityModel.EntityState.PUTTED;
/*STA*/
Neo.SmartContract.Framework.Services.Neo.Storage.Put(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bSTA), p._state.AsBigInteger());
/*EXT*/
Neo.SmartContract.Framework.Services.Neo.Storage.Put(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bEXT), p._extension);
/*FIELD*/
Neo.SmartContract.Framework.Services.Neo.Storage.Put(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bX), p._x);
/*FIELD*/
Neo.SmartContract.Framework.Services.Neo.Storage.Put(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bY), p._y);
LogExt("PutElement(vau,i).p", p);
return(true);
}
/// <summary>
/// Get an element of an array of entities from Storage based on a NeoStorageKey (NPC Level 4)
/// </summary>
/// <param name="vau">vau</param>
/// <param name="index">index</param>
/// <returns>Point</returns>
public static Point GetElement(NeoVersionedAppUser vau, int index)
{
if (NeoVersionedAppUser.IsNull(vau))
{
return(Null());
}
Neo.SmartContract.Framework.Services.Neo.StorageContext ctx = Neo.SmartContract.Framework.Services.Neo.Storage.CurrentContext;
NeoStorageKey nsk = NeoStorageKey.New(vau, "Point");
Point p;
byte[] bkey;
/*STA*/
byte[] bsta = Neo.SmartContract.Framework.Services.Neo.Storage.Get(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bSTA));
NeoTrace.Trace("Get(kb).bs", bsta.Length, bsta);
if (bsta.Length == 0)
{
p = Point.Missing();
}
else // not MISSING
{
/*EXT*/
byte[] bext = Neo.SmartContract.Framework.Services.Neo.Storage.Get(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bEXT));
int ista = (int)bsta.AsBigInteger();
NeoEntityModel.EntityState sta = (NeoEntityModel.EntityState)ista;
if (sta == NeoEntityModel.EntityState.TOMBSTONED)
{
p = Point.Tombstone();
p._extension = bext; // TODO: does a Tomestone bury all of its extensions?
}
else // not MISSING && not TOMBSTONED
{
p = new Point();
/*FIELD*/
BigInteger x = Neo.SmartContract.Framework.Services.Neo.Storage.Get(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bX)).AsBigInteger();
/*FIELD*/
BigInteger y = Neo.SmartContract.Framework.Services.Neo.Storage.Get(ctx, bkey = NeoStorageKey.StorageKey(nsk, index, _bY)).AsBigInteger();
p._x = x;
p._y = y;
p._state = sta;
p._state = NeoEntityModel.EntityState.GETTED; /* OVERRIDE */
p._extension = bext;
}
}
LogExt("Get(kb).p", p);
return(p);
}