31 lines
686 B
JavaScript
31 lines
686 B
JavaScript
let traitId = 0;
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const idToTraitMap = new Map();
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const traitToIdMap = new Map();
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const traitRegistry = new Map();
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export function registerTrait(Trait) {
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const hadTrait = traitRegistry.has(Trait.type());
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traitRegistry.set(Trait.type(), Trait);
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if (!hadTrait) {
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traitToIdMap.set(Trait.type(), traitId);
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idToTraitMap.set(traitId, Trait.type());
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traitId += 1;
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}
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}
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export function hasTrait(type) {
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return traitRegistry.has(type);
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}
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export function idFromTrait(Trait) {
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return traitToIdMap.get(Trait.type());
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}
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export function lookupTrait(type) {
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return traitRegistry.get(type);
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}
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export function traitFromId(id) {
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return lookupTrait(idToTraitMap.get(id));
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}
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