29 lines
998 B
TypeScript
29 lines
998 B
TypeScript
import Alea from 'alea';
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/**
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* Return a function that can be be used as InputProvider.rollDice
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* this function instance must be used for the entire action
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*/
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export default function getDeterministicDiceRoller(
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actionId: string
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): (dice: { number: number, diceSize: number }[]) => Promise<number[][]> {
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// Create a random number generator seeded on the ID of the action
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if (!actionId) throw new Meteor.Error('Id Required', 'action ID can not be ' + actionId)
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const randFrac = Alea(actionId);
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return (dice) => {
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const results: number[][] = [];
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for (const diceRoll of dice) {
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const values: number[] = [];
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if (diceRoll.number > 100) {
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throw new Meteor.Error('Too many dice', 'can only roll up to 100 dice at once');
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}
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for (let i = 0; i < diceRoll.number; i++) {
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const rolledValue = ~~(randFrac() * diceRoll.diceSize) + 1
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values.push(rolledValue);
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}
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results.push(values);
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}
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return Promise.resolve(results);
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}
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}
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