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dcc0e79435
Like move validation, evolutions are the earliest thing we wish to traverse when determining what encounters may have originated the current Pokémon. To determine the permitted species-form-levels a Pokémon could originate with, we must devolve a Pokémon by traveling down-generation to origin. Once we have an encounter, we can then evolve it to the current species, traversing upwards from origin to the current format.
62 lines
2.6 KiB
C#
62 lines
2.6 KiB
C#
using static PKHeX.Core.EvolutionRestrictions;
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using static PKHeX.Core.LegalityCheckStrings;
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namespace PKHeX.Core;
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/// <summary>
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/// Verify Evolution Information for a matched <see cref="IEncounterable"/>
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/// </summary>
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public static class EvolutionVerifier
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{
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private static readonly CheckResult VALID = new(CheckIdentifier.Evolution);
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/// <summary>
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/// Verifies Evolution scenarios of an <see cref="IEncounterable"/> for an input <see cref="PKM"/> and relevant <see cref="LegalInfo"/>.
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/// </summary>
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/// <param name="pk">Source data to verify</param>
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/// <param name="info">Source supporting information to verify with</param>
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public static CheckResult VerifyEvolution(PKM pk, LegalInfo info)
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{
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// Check if basic evolution methods are satisfiable with this encounter.
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if (!IsValidEvolution(pk, info.EvoChainsAllGens, info.EncounterOriginal))
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return new CheckResult(Severity.Invalid, CheckIdentifier.Evolution, LEvoInvalid);
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// Check if complex evolution methods are satisfiable with this encounter.
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if (!IsValidEvolutionWithMove(pk, info))
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return new CheckResult(Severity.Invalid, CheckIdentifier.Evolution, string.Format(LMoveEvoFCombination_0, ParseSettings.SpeciesStrings[pk.Species]));
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return VALID;
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}
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/// <summary>
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/// Checks if the Evolution from the source <see cref="IEncounterable"/> is valid.
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/// </summary>
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/// <param name="pk">Source data to verify</param>
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/// <param name="history">Source supporting information to verify with</param>
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/// <param name="enc">Matched encounter</param>
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/// <returns>Evolution is valid or not</returns>
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private static bool IsValidEvolution(PKM pk, EvolutionHistory history, IEncounterTemplate enc)
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{
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// OK if un-evolved from original encounter
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var encSpecies = enc.Species;
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var curSpecies = pk.Species;
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if (curSpecies == encSpecies)
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return true; // never evolved
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var current = history.Get(pk.Context);
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if (!EvolutionUtil.Contains(current, curSpecies))
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return false; // Can't exist as current species
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// Double check that our encounter was able to exist as the encounter species.
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var original = history.Get(enc.Context);
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if (!EvolutionUtil.Contains(original, encSpecies))
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return false;
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// Bigender->Fixed (non-Genderless) destination species, accounting for PID-Gender relationship
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if (curSpecies == (int)Species.Vespiquen && enc.Generation < 6 && (pk.EncryptionConstant & 0xFF) >= 0x1F) // Combee->Vespiquen Invalid Evolution
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return false;
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return true;
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}
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}
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