ecclesia/dist/election.js

Framework for political and electoral simulations

import { NumberCounter } from "@gouvernathor/python/collections";
import { createRandomObj } from "./utils";
/**
 * Implements the most basic elections : combining a voting method and an attribution method.
 */
export function standardElection({ votingMethod, attributionMethod }) {
    return (pool, candidates) => {
        return attributionMethod(votingMethod(pool, candidates));
    };
}
/**
 * Implements a selection by lottery, directly among the population.
 * Adds the supplementary constraint that the voter type and the candidate type must be the same.
 *
 * The pool of candidates and the pool of citizens must be the same.
 * (Implementation detail : this is not enforced, and the pool of candidates is ignored.)
 * Returns elements from the pool picked without replacement,
 * so the pool must be at least nSeats in size.
 */
export function sortition({ nSeats, ...randomParam }) {
    return (citizens) => {
        const randomObj = createRandomObj(randomParam);
        return NumberCounter.fromKeys(randomObj.shuffled(citizens, nSeats));
    };
}
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