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Rewrite gen1 trade evo check

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Closes #3266 ty @CanoeHope !
This commit is contained in:
Kurt 2021-10-07 23:56:01 -07:00
parent cb204f335b
commit 97af5a31c1
1 changed files with 35 additions and 16 deletions
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51
PKHeX.Core/Legality/Verifiers/LevelVerifier.cs
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@ -1,4 +1,5 @@
using static PKHeX.Core.LegalityCheckStrings; using System.Linq;
using static PKHeX.Core.LegalityCheckStrings;
namespace PKHeX.Core namespace PKHeX.Core
{ {
@ -81,28 +82,46 @@ namespace PKHeX.Core
data.AddLine(GetInvalid(LLevelMetBelow)); data.AddLine(GetInvalid(LLevelMetBelow));
} }
// There is no way to prevent a gen1 trade evolution as held items (everstone) did not exist. if (IsTradeEvolutionRequired(data, enc))
// Machoke, Graveler, Haunter and Kadabra captured in the second phase evolution, excluding in-game trades, are already checked {
if (pkm.Format <= 2 && enc is not EncounterTrade && enc.Species == pkm.Species && GBRestrictions.Trade_Evolution1.Contains(enc.Species)) // Pokemon has been traded illegally between games without evolving.
VerifyG1TradeEvo(data); // Trade evolution species IDs for Gen1 are sequential dex numbers.
var species = enc.Species;
var evolved = ParseSettings.SpeciesStrings[species + 1];
var unevolved = ParseSettings.SpeciesStrings[species];
data.AddLine(GetInvalid(string.Format(LEvoTradeReqOutsider, unevolved, evolved)));
}
} }
private void VerifyG1TradeEvo(LegalityAnalysis data) /// <summary>
/// Checks if a Gen1 trade evolution must have occurred.
/// </summary>
private static bool IsTradeEvolutionRequired(LegalityAnalysis data, IEncounterTemplate enc)
{ {
// There is no way to prevent a Gen1 trade evolution, as held items (Everstone) did not exist.
// Machoke, Graveler, Haunter and Kadabra captured in the second phase evolution, excluding in-game trades, are already checked
var pkm = data.pkm;
var species = pkm.Species;
// This check is only applicable if it's a trade evolution that has not been evolved.
if (!GBRestrictions.Trade_Evolution1.Contains(enc.Species) || enc.Species != species)
return false;
// Context check is only applicable to gen1/2; transferring to Gen2 is a trade. // Context check is only applicable to gen1/2; transferring to Gen2 is a trade.
// Stadium 2 can transfer across game/generation boundaries without initiating a trade. // Stadium 2 can transfer across game/generation boundaries without initiating a trade.
// Ignore this check if the environment's loaded trainer is not from Gen1/2 or is from GB Era.
if (ParseSettings.ActiveTrainer.Generation >= 3 || ParseSettings.AllowGBCartEra) if (ParseSettings.ActiveTrainer.Generation >= 3 || ParseSettings.AllowGBCartEra)
return; return false;
var pkm = data.pkm; // Gen2 stuff can be traded between Gen2 games holding an Everstone, assuming it hasn't been transferred to Gen1 for special moves.
var mustevolve = pkm.Format != 1 || !ParseSettings.IsFromActiveTrainer(pkm); if (enc.Generation == 2)
if (!mustevolve) return data.Info.Moves.All(z => z.Generation == 2);
return; // Gen1 stuff can only be un-evolved if it was never traded from the OT.
if (data.Info.Moves.Any(z => z.Generation != 1))
// Pokemon have been traded but it is not evolved, trade evolutions are sequential dex numbers return true; // traded to Gen2 for special moves
var evolved = ParseSettings.SpeciesStrings[pkm.Species + 1]; if (pkm.Format != 1)
var unevolved = ParseSettings.SpeciesStrings[pkm.Species]; return true; // traded to Gen2 (current state)
data.AddLine(GetInvalid(string.Format(LEvoTradeReqOutsider, unevolved, evolved))); return !ParseSettings.IsFromActiveTrainer(pkm); // not with OT
} }
} }
} }