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team-validator.js
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/**
* Team Validator
* Pokemon Showdown - http://pokemonshowdown.com/
*
* Handles team validation, and specifically learnset checking.
*
* @license MIT license
*/
'use strict';
let TeamValidator = module.exports = getValidator;
let PM;
class Validator {
constructor(format) {
this.format = Dex.getFormat(format);
this.dex = Dex.forFormat(this.format);
this.ruleTable = this.dex.getRuleTable(this.format);
}
validateTeam(team, removeNicknames) {
if (this.format.validateTeam) return this.format.validateTeam.call(this, team, removeNicknames);
return this.baseValidateTeam(team, removeNicknames);
}
prepTeam(team, removeNicknames) {
removeNicknames = removeNicknames ? '1' : '0';
let id = this.format.id;
if (this.format.customRules) id += '@@@' + this.format.customRules.join(',');
return PM.send(id, removeNicknames, team);
}
baseValidateTeam(team, removeNicknames) {
let format = this.format;
let dex = this.dex;
let problems = [];
const ruleTable = this.ruleTable;
if (format.team) {
return false;
}
if (!team || !Array.isArray(team)) {
if (format.canUseRandomTeam) {
return false;
}
return [`You sent invalid team data. If you're not using a custom client, please report this as a bug.`];
}
let lengthRange = format.teamLength && format.teamLength.validate;
if (!lengthRange) lengthRange = [1, 6];
if (format.gameType === 'doubles' && lengthRange[0] < 2) lengthRange[0] = 2;
if ((format.gameType === 'triples' || format.gameType === 'rotation') && lengthRange[0] < 3) lengthRange[0] = 3;
if (team.length < lengthRange[0]) problems.push([`You must bring at least ${lengthRange[0]} Pok\u00E9mon.`]);
if (team.length > lengthRange[1]) return [`You may only bring up to ${lengthRange[1]} Pok\u00E9mon.`];
// A limit is imposed here to prevent too much engine strain or
// too much layout deformation - to be exact, this is the limit
// allowed in Custom Game.
// The usual limit of 6 pokemon is handled elsewhere - currently
// in the cartridge-compliant set validator: rulesets.js:pokemon
if (team.length > 24) {
problems.push(`Your team has more than than 24 Pok\u00E9mon, which the simulator can't handle.`);
return;
}
let teamHas = {};
for (let i = 0; i < team.length; i++) { // Changing this loop to for-of would require another loop/map statement to do removeNicknames
if (!team[i]) return [`You sent invalid team data. If you're not using a custom client, please report this as a bug.`];
let setProblems = (format.validateSet || this.validateSet).call(this, team[i], teamHas);
if (setProblems) {
problems = problems.concat(setProblems);
}
if (removeNicknames) team[i].name = team[i].baseSpecies;
}
for (const [rule, source, limit, bans] of ruleTable.complexTeamBans) {
let count = 0;
for (const ban of bans) {
if (teamHas[ban] > 0) {
count += limit ? teamHas[ban] : 1;
}
}
if (limit && count > limit) {
const clause = source ? ` by ${source}` : ``;
problems.push(`You are limited to ${limit} of ${rule}${clause}.`);
} else if (!limit && count >= bans.length) {
const clause = source ? ` by ${source}` : ``;
problems.push(`Your team has the combination of ${rule}, which is banned${clause}.`);
}
}
for (const [rule] of ruleTable) {
let subformat = dex.getFormat(rule);
if (subformat.onValidateTeam && ruleTable.has(subformat.id)) {
problems = problems.concat(subformat.onValidateTeam.call(dex, team, format, teamHas) || []);
}
}
if (format.onValidateTeam) {
problems = problems.concat(format.onValidateTeam.call(dex, team, format, teamHas) || []);
}
if (!problems.length) return false;
return problems;
}
validateSet(set, teamHas, template) {
let format = this.format;
let dex = this.dex;
let problems = [];
if (!set) {
return [`This is not a Pokemon.`];
}
set.species = Dex.getSpecies(set.species);
set.name = dex.getName(set.name);
let item = dex.getItem(Dex.getString(set.item));
set.item = item.name;
let ability = dex.getAbility(Dex.getString(set.ability));
set.ability = ability.name;
set.nature = dex.getNature(Dex.getString(set.nature)).name;
if (!Array.isArray(set.moves)) set.moves = [];
let maxLevel = format.maxLevel || 100;
let maxForcedLevel = format.maxForcedLevel || maxLevel;
if (!set.level) {
set.level = (format.defaultLevel || maxLevel);
}
if (format.forcedLevel) {
set.forcedLevel = format.forcedLevel;
} else if (set.level >= maxForcedLevel) {
set.forcedLevel = maxForcedLevel;
}
if (set.level > maxLevel || set.level === set.forcedLevel || set.level === set.maxForcedLevel) {
set.level = maxLevel;
}
let nameTemplate = dex.getTemplate(set.name);
if (toId(format.name) !== 'gen7crossevolution' && nameTemplate.exists && nameTemplate.name.toLowerCase() === set.name.toLowerCase()) {
set.name = null;
}
set.name = set.name || set.baseSpecies;
let name = set.species;
if (set.species !== set.name && set.baseSpecies !== set.name) name = `${set.name} (${set.species})`;
let isHidden = false;
let lsetData = {set:set, format:format};
let setHas = {};
const ruleTable = this.ruleTable;
for (const [rule] of ruleTable) {
let subformat = dex.getFormat(rule);
if (subformat.onChangeSet && ruleTable.has(subformat.id)) {
problems = problems.concat(subformat.onChangeSet.call(dex, set, format) || []);
}
}
if (format.onChangeSet) {
problems = problems.concat(format.onChangeSet.call(dex, set, format, setHas, teamHas) || []);
}
if (!template) {
template = dex.getTemplate(set.species);
if (ability.id === 'battlebond' && template.id === 'greninja' && !ruleTable.has('ignoreillegalabilities')) {
template = dex.getTemplate('greninjaash');
set.gender = 'M';
}
}
if (!template.exists) {
return [`The Pokemon "${set.species}" does not exist.`];
}
item = dex.getItem(set.item);
if (item.id && !item.exists) {
return [`"${set.item}" is an invalid item.`];
}
ability = dex.getAbility(set.ability);
if (ability.id && !ability.exists) {
if (dex.gen < 3) {
// gen 1-2 don't have abilities, just silently remove
ability = dex.getAbility('');
set.ability = '';
} else {
return [`"${set.ability}" is an invalid ability.`];
}
}
if (set.nature && !dex.getNature(set.nature).exists) {
if (dex.gen < 3) {
// gen 1-2 don't have natures, just remove them
set.nature = '';
} else {
return [`${set.species}'s nature is invalid.`];
}
}
if (set.happiness !== undefined && isNaN(set.happiness)) {
problems.push(`${set.species} has an invalid happiness.`);
}
let banReason = ruleTable.check(template.id, setHas) || ruleTable.check(template.id + 'base', setHas);
if (banReason) {
return [`${set.species} is ${banReason}.`];
} else {
banReason = ruleTable.check(toId(template.baseSpecies), setHas);
if (banReason) {
return [`${template.baseSpecies} is ${banReason}.`];
}
}
banReason = ruleTable.check(toId(set.ability), setHas);
if (banReason) {
problems.push(`${name}'s ability ${set.ability} is ${banReason}.`);
}
banReason = ruleTable.check(toId(set.item), setHas);
if (banReason) {
problems.push(`${name}'s item ${set.item} is ${banReason}.`);
}
if (ruleTable.has('-unreleased') && item.isUnreleased) {
problems.push(`${name}'s item ${set.item} is unreleased.`);
}
if (ruleTable.has('-unreleased') && template.isUnreleased) {
if (template.eggGroups[0] === 'Undiscovered' && !template.evos) {
problems.push(`${name} (${template.species}) is unreleased.`);
}
}
setHas[toId(set.ability)] = true;
if (ruleTable.has('-illegal')) {
// Don't check abilities for metagames with All Abilities
if (dex.gen <= 2) {
set.ability = 'None';
} else if (!ruleTable.has('ignoreillegalabilities')) {
if (!ability.name) {
problems.push(`${name} needs to have an ability.`);
} else if (!Object.values(template.abilities).includes(ability.name)) {
problems.push(`${name} can't have ${set.ability}.`);
}
if (ability.name === template.abilities['H']) {
isHidden = true;
if (template.unreleasedHidden && ruleTable.has('-unreleased')) {
problems.push(`${name}'s hidden ability is unreleased.`);
} else if (set.species.endsWith('Orange') || set.species.endsWith('White') && ability.name === 'Symbiosis') {
problems.push(`${name}'s hidden ability is unreleased for the Orange and White forms.`);
} else if (dex.gen === 5 && set.level < 10 && (template.maleOnlyHidden || template.gender === 'N')) {
problems.push(`${name} must be at least level 10 with its hidden ability.`);
}
if (template.maleOnlyHidden) {
set.gender = 'M';
lsetData.sources = ['5D'];
}
}
}
}
if (set.moves && Array.isArray(set.moves)) {
set.moves = set.moves.filter(val => val);
}
if (!set.moves || !set.moves.length) {
problems.push(`${name} has no moves.`);
} else {
// A limit is imposed here to prevent too much engine strain or
// too much layout deformation - to be exact, this is the limit
// allowed in Custom Game.
// The usual limit of 4 moves is handled elsewhere - currently
// in the cartridge-compliant set validator: rulesets.js:pokemon
if (set.moves.length > 24) {
problems.push(`${name} has more than 24 moves, which the simulator can't handle.`);
return;
}
set.ivs = Validator.fillStats(set.ivs, 31);
let maxedIVs = Object.values(set.ivs).every(val => val === 31);
for (const moveName of set.moves) {
if (!moveName) continue;
let move = dex.getMove(Dex.getString(moveName));
if (!move.exists) return [`"${move.name}" is an invalid move.`];
banReason = ruleTable.check(move.id, setHas);
if (banReason) {
problems.push(`${name}'s move ${move.name} is ${banReason}.`);
}
// Note that we don't error out on multiple Hidden Power types
// That is checked in rulesets.js rule Pokemon
if (move.id === 'hiddenpower' && move.type !== 'Normal' && !set.hpType) {
set.hpType = move.type;
}
if (ruleTable.has('-unreleased')) {
if (move.isUnreleased) problems.push(`${name}'s move ${move.name} is unreleased.`);
}
if (ruleTable.has('-illegal')) {
let problem = this.checkLearnset(move, template, lsetData);
if (problem) {
// Sketchmons hack
const noSketch = format.noSketch || dex.getFormat('gen7sketchmons').noSketch;
if (ruleTable.has('allowonesketch') && noSketch.indexOf(move.name) < 0 && !set.sketchmonsMove && !move.noSketch && !move.isZ) {
set.sketchmonsMove = move.id;
continue;
}
let problemString = `${name} can't learn ${move.name}`;
if (problem.type === 'incompatibleAbility') {
problemString = problemString.concat(` because it's incompatible with its ability.`);
} else if (problem.type === 'incompatible') {
problemString = problemString.concat(` because it's incompatible with another move.`);
} else if (problem.type === 'oversketched') {
let plural = (parseInt(problem.maxSketches) === 1 ? '' : 's');
problemString = problemString.concat(` because it can only sketch ${problem.maxSketches} move${plural}.`);
} else if (problem.type === 'pastgen') {
problemString = problemString.concat(` because it needs to be from generation ${problem.gen} or later.`);
} else {
problemString = problemString.concat(`.`);
}
problems.push(problemString);
}
}
}
const canBottleCap = (dex.gen >= 7 && set.level === 100);
if (set.hpType && maxedIVs && ruleTable.has('pokemon')) {
if (dex.gen <= 2) {
let HPdvs = dex.getType(set.hpType).HPdvs;
set.ivs = {hp: 30, atk: 30, def: 30, spa: 30, spd: 30, spe: 30};
for (let i in HPdvs) {
set.ivs[i] = HPdvs[i] * 2;
}
} else if (!canBottleCap) {
set.ivs = Validator.fillStats(dex.getType(set.hpType).HPivs, 31);
}
}
if (set.hpType === 'Fighting' && ruleTable.has('pokemon')) {
if (template.gen >= 6 && template.eggGroups[0] === 'Undiscovered' && !template.nfe && (template.baseSpecies !== 'Diancie' || !set.shiny)) {
// Legendary Pokemon must have at least 3 perfect IVs in gen 6+
problems.push(`${name} must not have Hidden Power Fighting because it starts with 3 perfect IVs because it's a gen 6+ legendary.`);
}
}
const ivHpType = dex.getHiddenPower(set.ivs).type;
if (!canBottleCap && ruleTable.has('pokemon') && set.hpType && set.hpType !== ivHpType) {
problems.push(`${name} has Hidden Power ${set.hpType}, but its IVs are for Hidden Power ${ivHpType}.`);
}
if (dex.gen <= 2) {
// validate DVs
const hpDV = Math.floor(set.ivs.hp / 2);
const atkDV = Math.floor(set.ivs.atk / 2);
const defDV = Math.floor(set.ivs.def / 2);
const speDV = Math.floor(set.ivs.spe / 2);
const spcDV = Math.floor(set.ivs.spa / 2);
const expectedHpDV = (atkDV % 2) * 8 + (defDV % 2) * 4 + (speDV % 2) * 2 + (spcDV % 2);
if (expectedHpDV !== hpDV) {
problems.push(`${name} has an HP DV of ${hpDV}, but its Atk, Def, Spe, and Spc DVs give it an HP DV of ${expectedHpDV}.`);
}
if (set.ivs.spa !== set.ivs.spd) {
if (dex.gen === 2) {
problems.push(`${name} has different SpA and SpD DVs, which is not possible in Gen 2.`);
} else {
set.ivs.spd = set.ivs.spa;
}
}
if (dex.gen > 1 && !template.gender) {
// Gen 2 gender is calculated from the Atk DV.
// High Atk DV <-> M. The meaning of "high" depends on the gender ratio.
let genderThreshold = template.genderRatio.F * 16;
if (genderThreshold === 4) genderThreshold = 5;
if (genderThreshold === 8) genderThreshold = 7;
const expectedGender = (atkDV >= genderThreshold ? 'M' : 'F');
if (set.gender && set.gender !== expectedGender) {
problems.push(`${name} is ${set.gender}, but it has an Atk DV of ${atkDV}, which makes its gender ${expectedGender}.`);
} else {
set.gender = expectedGender;
}
}
if (dex.gen > 1) {
const expectedShiny = !!(defDV === 10 && speDV === 10 && spcDV === 10 && atkDV % 4 >= 2);
if (expectedShiny && !set.shiny) {
problems.push(`${name} is not shiny, which does not match its DVs.`);
} else if (!expectedShiny && set.shiny) {
problems.push(`${name} is shiny, which does not match its DVs (its DVs must all be 10, except Atk which must be 2, 3, 6, 7, 10, 11, 14, or 15).`);
}
}
}
if (dex.gen <= 2 || dex.gen !== 6 && (format.id.endsWith('hackmons') || format.name.includes('BH'))) {
if (!set.evs) set.evs = Validator.fillStats(null, 252);
let evTotal = (set.evs.hp || 0) + (set.evs.atk || 0) + (set.evs.def || 0) + (set.evs.spa || 0) + (set.evs.spd || 0) + (set.evs.spe || 0);
if (evTotal === 508 || evTotal === 510) {
problems.push(`${name} has exactly 510 EVs, but this format does not restrict you to 510 EVs: you can max out every EV (If this was intentional, add exactly 1 to one of your EVs, which won't change its stats but will tell us that it wasn't a mistake).`);
}
}
if (set.evs && !Object.values(set.evs).some(value => value > 0)) {
problems.push(`${name} has exactly 0 EVs - did you forget to EV it? (If this was intentional, add exactly 1 to one of your EVs, which won't change its stats but will tell us that it wasn't a mistake).`);
}
if (lsetData.limitedEgg && lsetData.limitedEgg.length > 1 && !lsetData.sourcesBefore && lsetData.sources) {
// console.log("limitedEgg 1: " + lsetData.limitedEgg);
// Multiple gen 2-5 egg moves
// This code hasn't been closely audited for multi-gen interaction, but
// since egg moves don't get removed between gens, it's unlikely to have
// any serious problems.
let limitedEgg = Array.from(new Set(lsetData.limitedEgg));
if (limitedEgg.length <= 1) {
// Only one source, can't conflict with anything else
} else if (limitedEgg.includes('self')) {
// Self-moves are always incompatible with anything else
problems.push(`${name}'s egg moves are incompatible.`);
} else {
// Doing a full validation of the possible egg parents takes way too much
// CPU power (and is in NP), so we're just gonna use a heuristic:
// They're probably incompatible if all potential fathers learn more than
// one limitedEgg move from another egg.
let validFatherExists = false;
for (const source of lsetData.sources) {
if (source.charAt(1) === 'S' || source.charAt(1) === 'D') continue;
let eggGen = parseInt(source.charAt(0));
if (source.charAt(1) !== 'E' || eggGen === 6) {
// (There is a way to obtain this pokemon without past-gen breeding.)
// In theory, limitedEgg should not exist in this case.
throw new Error(`invalid limitedEgg on ${name}: ${limitedEgg} with ${source}`);
}
let potentialFather = dex.getTemplate(source.slice(source.charAt(2) === 'T' ? 3 : 2));
let restrictedSources = 0;
for (const moveid of limitedEgg) {
let fatherSources = potentialFather.learnset[moveid] || potentialFather.learnset['sketch'];
if (!fatherSources) throw new Error(`Egg move father ${potentialFather.id} can't learn ${moveid}`);
let hasUnrestrictedSource = false;
let hasSource = false;
for (const fatherSource of fatherSources) {
// Triply nested loop! Fortunately, all the loops are designed
// to be as short as possible.
if (source.charAt(0) > eggGen) continue;
hasSource = true;
if (fatherSource.charAt(1) !== 'E' && fatherSource.charAt(1) !== 'S') {
hasUnrestrictedSource = true;
break;
}
}
if (!hasSource) {
// no match for the current gen; early escape
restrictedSources = 10;
break;
}
if (!hasUnrestrictedSource) restrictedSources++;
if (restrictedSources > 1) break;
}
if (restrictedSources <= 1) {
validFatherExists = true;
// console.log("valid father: " + potentialFather.id);
break;
}
}
if (!validFatherExists) {
// Could not find a valid father using our heuristic.
// TODO: hardcode false positives for our heuristic
// in theory, this heuristic doesn't have false negatives
let newSources = [];
for (const source of lsetData.sources) {
if (source.charAt(1) === 'S') {
newSources.push(source);
}
}
lsetData.sources = newSources;
if (!newSources.length) {
const moveNames = limitedEgg.map(id => dex.getMove(id).name);
problems.push(`${name}'s past gen egg moves ${moveNames.join(', ')} do not have a valid father. (Is this incorrect? If so, post the chainbreeding instructions in Bug Reports)`);
}
}
}
}
if (lsetData.sources && lsetData.sources.length && !lsetData.sourcesBefore && lsetData.sources.every(source => 'SVD'.includes(source.charAt(1)))) {
// Every source is restricted
let legal = false;
for (const source of lsetData.sources) {
if (this.validateSource(set, source, template)) continue;
legal = true;
break;
}
if (!legal) {
if (lsetData.sources.length > 1) {
problems.push(`${template.species} has an event-exclusive move that it doesn't qualify for (only one of several ways to get the move will be listed):`);
}
let eventProblems = this.validateSource(set, lsetData.sources[0], template, ` because it has a move only available`);
if (eventProblems) problems.push(...eventProblems);
}
} else if (ruleTable.has('-illegal') && template.eventOnly) {
let eventTemplate = !template.learnset && template.baseSpecies !== template.species ? dex.getTemplate(template.baseSpecies) : template;
let eventPokemon = eventTemplate.eventPokemon;
let legal = false;
for (const eventData of eventPokemon) {
if (this.validateEvent(set, eventData, eventTemplate)) continue;
legal = true;
if (eventData.gender) set.gender = eventData.gender;
break;
}
if (!legal) {
if (eventPokemon.length === 1) {
problems.push(`${template.species} is only obtainable from an event - it needs to match its event:`);
} else {
problems.push(`${template.species} is only obtainable from events - it needs to match one of its events, such as:`);
}
let eventData = eventPokemon[0];
const minPastGen = (format.requirePlus ? 7 : format.requirePentagon ? 6 : 1);
let eventNum = 1;
for (let i = 0; i < eventPokemon.length; i++) {
if (eventPokemon[i].generation <= dex.gen && eventPokemon[i].generation >= minPastGen) {
eventData = eventPokemon[i];
eventNum = i + 1;
break;
}
}
let eventName = eventPokemon.length > 1 ? ` #${eventNum}` : ``;
let eventProblems = this.validateEvent(set, eventData, eventTemplate, ` to be`, `from its event${eventName}`);
if (eventProblems) problems.push(...eventProblems);
}
}
if (isHidden && lsetData.sourcesBefore) {
if (!lsetData.sources && lsetData.sourcesBefore < 5) {
problems.push(`${name} has a hidden ability - it can't have moves only learned before gen 5.`);
} else if (lsetData.sources && template.gender && template.gender !== 'F' && !{'Nidoran-M':1, 'Nidorino':1, 'Nidoking':1, 'Volbeat':1}[template.species]) {
let compatibleSource = false;
for (const learned of lsetData.sources) {
if (learned.charAt(1) === 'E' || (learned.substr(0, 2) === '5D' && set.level >= 10)) {
compatibleSource = true;
break;
}
}
if (!compatibleSource) {
problems.push(`${name} has moves incompatible with its hidden ability.`);
}
}
}
if (ruleTable.has('-illegal') && set.level < template.evoLevel) {
// FIXME: Event pokemon given at a level under what it normally can be attained at gives a false positive
problems.push(`${name} must be at least level ${template.evoLevel} to be evolved.`);
}
if (!lsetData.sources && lsetData.sourcesBefore <= 3 && dex.getAbility(set.ability).gen === 4 && !template.prevo && dex.gen <= 5) {
problems.push(`${name} has a gen 4 ability and isn't evolved - it can't use anything from gen 3.`);
}
if (!lsetData.sources && lsetData.sourcesBefore < 6 && lsetData.sourcesBefore >= 3 && (isHidden || dex.gen <= 5) && template.gen <= lsetData.sourcesBefore) {
let oldAbilities = dex.mod('gen' + lsetData.sourcesBefore).getTemplate(set.species).abilities;
if (ability.name !== oldAbilities['0'] && ability.name !== oldAbilities['1'] && !oldAbilities['H']) {
problems.push(`${name} has moves incompatible with its ability.`);
}
}
}
if (item.megaEvolves === template.species) {
template = dex.getTemplate(item.megaStone);
}
if (ruleTable.has('-mega') && template.forme in {'Mega': 1, 'Mega-X': 1, 'Mega-Y': 1}) {
problems.push(`Mega evolutions are banned.`);
}
if (template.tier) {
banReason = ruleTable.check(toId(template.tier), setHas);
if (banReason && !ruleTable.has('+' + template.id)) {
problems.push(`${template.species} is in ${template.tier}, which is ${banReason}.`);
}
}
if (teamHas) {
for (let i in setHas) {
if (i in teamHas) {
teamHas[i]++;
} else {
teamHas[i] = 1;
}
}
}
for (const [rule, source, limit, bans] of ruleTable.complexBans) {
let count = 0;
for (const ban of bans) {
if (setHas[ban] > 0) {
count += limit ? setHas[ban] : 1;
}
}
if (limit && count > limit) {
const clause = source ? ` by ${source}` : ``;
problems.push(`${name} is limited to ${limit} of ${rule}${clause}.`);
} else if (!limit && count >= bans.length) {
const clause = source ? ` by ${source}` : ``;
problems.push(`${name} has the combination of ${rule}, which is banned${clause}.`);
}
}
for (const [rule] of ruleTable) {
if (rule.startsWith('!')) continue;
let subformat = dex.getFormat(rule);
if (subformat.onValidateSet && ruleTable.has(subformat.id)) {
problems = problems.concat(subformat.onValidateSet.call(dex, set, format, setHas, teamHas) || []);
}
}
if (format.onValidateSet) {
problems = problems.concat(format.onValidateSet.call(dex, set, format, setHas, teamHas) || []);
}
if (!problems.length) {
if (set.forcedLevel) set.level = set.forcedLevel;
return false;
}
return problems;
}
/**
* Returns array of error messages if invalid, undefined if valid
*
* If `because` is not passed, instead returns true if invalid.
*/
validateSource(set, source, template, because, from) {
let eventData;
let eventTemplate = template;
if (source.charAt(1) === 'S') {
let splitSource = source.substr(source.charAt(2) === 'T' ? 3 : 2).split(' ');
eventTemplate = this.dex.getTemplate(splitSource[1]);
if (eventTemplate.eventPokemon) eventData = eventTemplate.eventPokemon[parseInt(splitSource[0])];
if (!eventData) {
throw new Error(`${eventTemplate.species} from ${template.species} doesn't have data for event ${source}`);
}
} else if (source.charAt(1) === 'V') {
eventData = {
generation: 1,
perfectIVs: (template.speciesid === 'mew' ? 5 : 3),
isHidden: true,
from: 'Gen 1 Virtual Console transfer',
};
} else if (source.charAt(1) === 'D') {
eventData = {
generation: 5,
level: 10,
from: 'Gen 5 Dream World',
};
} else {
throw new Error(`Unidentified source ${source} passed to validateSource`);
}
return this.validateEvent(set, eventData, eventTemplate, because, from);
}
/**
* Returns array of error messages if invalid, undefined if valid
*
* If `because` is not passed, instead returns true if invalid.
*/
validateEvent(set, eventData, eventTemplate, because, from = `from an event`) {
let dex = this.dex;
let name = set.species;
let template = dex.getTemplate(set.species);
if (!eventTemplate) eventTemplate = template;
if (set.species !== set.name && set.baseSpecies !== set.name) name = `${set.name} (${set.species})`;
const fastReturn = !because;
if (eventData.from) from = `from ${eventData.from}`;
let etc = `${because} ${from}`;
let problems = [];
if (this.format.requirePentagon && eventData.generation < 6) {
if (fastReturn) return true;
problems.push(`This format requires Pokemon from gen 6 or later and ${name} is from gen ${eventData.generation}${etc}.`);
}
if (this.format.requirePlus && eventData.generation < 7) {
if (fastReturn) return true;
problems.push(`This format requires Pokemon from gen 7 and ${name} is from gen ${eventData.generation}${etc}.`);
}
if (dex.gen < eventData.generation) {
if (fastReturn) return true;
problems.push(`This format is in gen ${dex.gen} and ${name} is from gen ${eventData.generation}${etc}.`);
}
if (eventData.level && set.level < eventData.level) {
if (fastReturn) return true;
problems.push(`${name} must be at least level ${eventData.level}${etc}.`);
}
if ((eventData.shiny === true && !set.shiny) || (!eventData.shiny && set.shiny)) {
if (fastReturn) return true;
let shinyReq = eventData.shiny ? ` be shiny` : ` not be shiny`;
problems.push(`${name} must${shinyReq}${etc}.`);
}
if (eventData.gender) {
if (set.gender && eventData.gender !== set.gender) {
if (fastReturn) return true;
problems.push(`${name}'s gender must be ${eventData.gender}${etc}.`);
}
if (!fastReturn) set.gender = eventData.gender;
}
if (eventData.nature && eventData.nature !== set.nature) {
if (fastReturn) return true;
problems.push(`${name} must have a ${eventData.nature} nature${etc}.`);
}
let requiredIVs = 0;
if (eventData.ivs) {
/** In Gen 7, IVs can be changed to 31 */
const canBottleCap = (dex.gen >= 7 && set.level === 100);
if (!set.ivs) set.ivs = {hp: 31, atk: 31, def: 31, spa: 31, spd: 31, spe: 31};
let statTable = {hp:'HP', atk:'Attack', def:'Defense', spa:'Special Attack', spd:'Special Defense', spe:'Speed'};
for (let statId in eventData.ivs) {
if (canBottleCap && set.ivs[statId] === 31) continue;
if (set.ivs[statId] !== eventData.ivs[statId]) {
if (fastReturn) return true;
problems.push(`${name} must have ${eventData.ivs[statId]} ${statTable[statId]} IVs${etc}.`);
}
}
if (canBottleCap) {
// IVs can be overridden but Hidden Power type can't
if (Object.keys(eventData.ivs).length >= 6) {
const requiredHpType = dex.getHiddenPower(eventData.ivs).type;
if (set.hpType && set.hpType !== requiredHpType) {
if (fastReturn) return true;
problems.push(`${name} can only have Hidden Power ${requiredHpType}${etc}.`);
}
set.hpType = requiredHpType;
}
}
} else {
requiredIVs = eventData.perfectIVs || 0;
if (eventData.generation >= 6 && eventData.perfectIVs === undefined && Validator.hasLegendaryIVs(template)) {
requiredIVs = 3;
}
}
if (requiredIVs && set.ivs) {
// Legendary Pokemon must have at least 3 perfect IVs in gen 6
// Events can also have a certain amount of guaranteed perfect IVs
let perfectIVs = 0;
for (let i in set.ivs) {
if (set.ivs[i] >= 31) perfectIVs++;
}
if (perfectIVs < requiredIVs) {
if (fastReturn) return true;
if (eventData.perfectIVs) {
problems.push(`${name} must have at least ${requiredIVs} perfect IVs${etc}.`);
} else {
problems.push(`${name} is a legendary and must have at least three perfect IVs${etc}.`);
}
}
// The perfect IV count affects Hidden Power availability
if (dex.gen >= 3 && requiredIVs >= 3 && set.hpType === 'Fighting') {
if (fastReturn) return true;
problems.push(`${name} can't use Hidden Power Fighting because it must have at least three perfect IVs${etc}.`);
} else if (dex.gen >= 3 && requiredIVs >= 5 && set.hpType && !['Dark', 'Dragon', 'Electric', 'Steel', 'Ice'].includes(set.hpType)) {
if (fastReturn) return true;
problems.push(`${name} can only use Hidden Power Dark/Dragon/Electric/Steel/Ice because it must have at least 5 perfect IVs${etc}.`);
}
}
// Event-related ability restrictions only matter if we care about illegal abilities
const ruleTable = this.ruleTable;
if (!ruleTable.has('ignoreillegalabilities')) {
if (dex.gen <= 5 && eventData.abilities && eventData.abilities.length === 1 && !eventData.isHidden) {
if (template.species === eventTemplate.species) {
// has not evolved, abilities must match
const requiredAbility = dex.getAbility(eventData.abilities[0]).name;
if (set.ability !== requiredAbility) {
if (fastReturn) return true;
problems.push(`${name} must have ${requiredAbility}${etc}.`);
}
} else {
// has evolved
let ability1 = dex.getAbility(eventTemplate.abilities['1']);
if (ability1.gen && eventData.generation >= ability1.gen) {
// pokemon had 2 available abilities in the gen the event happened
// ability is restricted to a single ability slot
const requiredAbilitySlot = (toId(eventData.abilities[0]) === ability1.id ? 1 : 0);
const requiredAbility = dex.getAbility(template.abilities[requiredAbilitySlot] || template.abilities['0']).name;
if (set.ability !== requiredAbility) {
const originalAbility = dex.getAbility(eventData.abilities[0]).name;
if (fastReturn) return true;
problems.push(`${name} must have ${requiredAbility}${because} from a ${originalAbility} ${eventTemplate.species} event.`);
}
}
}
}
if (eventData.isHidden !== undefined && template.abilities['H']) {
const isHidden = (set.ability === template.abilities['H']);
if (isHidden !== eventData.isHidden) {
if (fastReturn) return true;
problems.push(`${name} must ${eventData.isHidden ? 'have' : 'not have'} its Hidden Ability${etc}.`);
}
}
}
if (!problems.length) return;
return problems;
}
checkLearnset(move, template, lsetData) {
let dex = this.dex;
let moveid = toId(move);
if (moveid === 'constructor') return true;
move = dex.getMove(moveid);
template = dex.getTemplate(template);
lsetData = lsetData || {};
let set = (lsetData.set || (lsetData.set = {}));
let format = (lsetData.format = dex.getFormat(lsetData.format));
let ruleTable = dex.getRuleTable(format);
let alreadyChecked = {};
let level = set.level || 100;
let incompatibleAbility = false;
let isHidden = false;
if (set.ability && dex.getAbility(set.ability).name === template.abilities['H']) isHidden = true;
let limit1 = true;
let sketch = false;
let blockedHM = false;
let sometimesPossible = false; // is this move in the learnset at all?
// This is a pretty complicated algorithm
// Abstractly, what it does is construct the union of sets of all
// possible ways this pokemon could be obtained, and then intersect
// it with a the pokemon's existing set of all possible ways it could
// be obtained. If this intersection is non-empty, the move is legal.
// We apply several optimizations to this algorithm. The most
// important is that with, for instance, a TM move, that Pokemon
// could have been obtained from any gen at or before that TM's gen.
// Instead of adding every possible source before or during that gen,
// we keep track of a maximum gen variable, intended to mean "any
// source at or before this gen is possible."
// set of possible sources of a pokemon with this move, represented as an array
let sources = [];
// the equivalent of adding "every source at or before this gen" to sources
let sourcesBefore = 0;
if (lsetData.sourcesBefore === undefined) lsetData.sourcesBefore = dex.gen;
/**
* The minimum past gen the format allows
*/
const minPastGen = (format.requirePlus ? 7 : format.requirePentagon ? 6 : 1);
/**
* The format doesn't allow Pokemon who've bred with past gen Pokemon
* (e.g. Gen 6-7 before Pokebank was released)
*/
const noPastGenBreeding = false;
/**
* The format doesn't allow Pokemon traded from the future
* (This is everything except in Gen 1 Tradeback)
*/
const noFutureGen = !ruleTable.has('allowtradeback');
/**
* If a move can only be learned from a gen 2-5 egg, we have to check chainbreeding validity
* limitedEgg is false if there are any legal non-egg sources for the move, and true otherwise
*/
let limitedEgg = null;
let tradebackEligible = false;
do {
alreadyChecked[template.speciesid] = true;
if (dex.gen === 2 && template.gen === 1) tradebackEligible = true;
if (!template.learnset) {
if (template.baseSpecies !== template.species) {
// forme without its own learnset
template = dex.getTemplate(template.baseSpecies);
// warning: formes with their own learnset, like Wormadam, should NOT
// inherit from their base forme unless they're freely switchable
continue;
}
// should never happen
break;
}
if (template.learnset[moveid] || template.learnset['sketch']) {
sometimesPossible = true;
let lset = template.learnset[moveid];
if (moveid === 'sketch' || !lset || template.speciesid === 'smeargle') {
if (move.noSketch || move.isZ) return true;
lset = template.learnset['sketch'];
sketch = true;
}
if (typeof lset === 'string') lset = [lset];
for (let learned of lset) {
let learnedGen = parseInt(learned.charAt(0));
if (learnedGen < minPastGen) continue;
if (noFutureGen && learnedGen > dex.gen) continue;
// redundant
if (learnedGen <= sourcesBefore) continue;
if (learnedGen < 7 && isHidden && !dex.mod('gen' + learnedGen).getTemplate(template.species).abilities['H']) {
// check if the Pokemon's hidden ability was available
incompatibleAbility = true;
continue;
}
if (!template.isNonstandard) {
// HMs can't be transferred
if (dex.gen >= 4 && learnedGen <= 3 && moveid in {'cut':1, 'fly':1, 'surf':1, 'strength':1, 'flash':1, 'rocksmash':1, 'waterfall':1, 'dive':1}) continue;
if (dex.gen >= 5 && learnedGen <= 4 && moveid in {'cut':1, 'fly':1, 'surf':1, 'strength':1, 'rocksmash':1, 'waterfall':1, 'rockclimb':1}) continue;
// Defog and Whirlpool can't be transferred together
if (dex.gen >= 5 && moveid in {'defog':1, 'whirlpool':1} && learnedGen <= 4) blockedHM = true;
}
if (learned.substr(0, 2) in {'4L':1, '5L':1, '6L':1, '7L':1}) {
// gen 4-7 level-up moves
if (level >= parseInt(learned.substr(2)) || learnedGen === 7 && dex.gen >= 7) {
// we're past the required level to learn it
return false;
}
if (!template.gender || template.gender === 'F') {
// available as egg move
learned = learnedGen + 'Eany';
limitedEgg = false;
} else {
// this move is unavailable, skip it
continue;
}
}
if (learned.charAt(1) in {L:1, M:1, T:1}) {
if (learnedGen === dex.gen) {
// current-gen TM or tutor moves:
// always available
return false;
}
// past-gen level-up, TM, or tutor moves:
// available as long as the source gen was or was before this gen
limit1 = false;
sourcesBefore = Math.max(sourcesBefore, learnedGen);
limitedEgg = false;
} else if (learned.charAt(1) === 'E') {
// egg moves:
// only if that was the source
if ((learnedGen >= 6 && !noPastGenBreeding) || lsetData.fastCheck) {
// gen 6 doesn't have egg move incompatibilities except for certain cases with baby Pokemon
learned = learnedGen + 'E' + (template.prevo ? template.id : '');
sources.push(learned);
limitedEgg = false;
continue;
}
// it's a past gen; egg moves can only be inherited from the father
// we'll add each possible father separately to the source list
let eggGroups = template.eggGroups;
if (!eggGroups) continue;
if (eggGroups[0] === 'Undiscovered') eggGroups = dex.getTemplate(template.evos[0]).eggGroups;
let atLeastOne = false;
let fromSelf = (learned.substr(1) === 'Eany');
let eggGroupsSet = new Set(eggGroups);
learned = learned.substr(0, 2);
// loop through pokemon for possible fathers to inherit the egg move from
for (let fatherid in dex.data.Pokedex) {
let father = dex.getTemplate(fatherid);
// can't inherit from CAP pokemon
if (father.isNonstandard) continue;
// can't breed mons from future gens
if (father.gen > learnedGen) continue;
// father must be male
if (father.gender === 'N' || father.gender === 'F') continue;
// can't inherit from dex entries with no learnsets
if (!father.learnset) continue;
// unless it's supposed to be self-breedable, can't inherit from self, prevos, evos, etc
// only basic pokemon have egg moves, so by now all evolutions should be in alreadyChecked
if (!fromSelf && alreadyChecked[father.speciesid]) continue;
if (!fromSelf && father.evos.includes(template.id)) continue;
if (!fromSelf && father.prevo === template.id) continue;
// father must be able to learn the move
let fatherSources = father.learnset[moveid] || father.learnset['sketch'];
if (!fromSelf && !fatherSources) continue;
// must be able to breed with father
if (!father.eggGroups.some(eggGroup => eggGroupsSet.has(eggGroup))) continue;
// detect unavailable egg moves
if (noPastGenBreeding) {
const fatherLatestMoveGen = fatherSources[0].charAt(0);
if (father.tier.startsWith('Bank') || fatherLatestMoveGen !== '7') continue;
atLeastOne = true;
break;
}
// we can breed with it
atLeastOne = true;
if (tradebackEligible && learnedGen === 2 && move.gen <= 1) {
// can tradeback
sources.push('1ET' + father.id);
}
sources.push(learned + father.id);
if (limitedEgg !== false) limitedEgg = true;
}
if (atLeastOne && noPastGenBreeding) {
// gen 6+ doesn't have egg move incompatibilities except for certain cases with baby Pokemon
learned = learnedGen + 'E' + (template.prevo ? template.id : '');
sources.push(learned);
limitedEgg = false;
continue;
}
// chainbreeding with itself
// e.g. ExtremeSpeed Dragonite
if (!atLeastOne) {
if (noPastGenBreeding) continue;
sources.push(learned + template.id);
limitedEgg = 'self';
}
} else if (learned.charAt(1) === 'S') {
// event moves:
// only if that was the source
// Event Pokémon:
// Available as long as the past gen can get the Pokémon and then trade it back.
if (tradebackEligible && learnedGen === 2 && move.gen <= 1) {
// can tradeback