@typed/effects/cjs/combinators/combine.js

Generator-powered Effect management

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.combine = void 0;
const disposable_1 = require("@typed/disposable");
const env_1 = require("@typed/env");
const run_1 = require("../run");
function* combine(...effects) {
    if (effects.length === 0) {
        return [];
    }
    return yield combineEnvs(effects.map(run_1.runEffect));
}
exports.combine = combine;
function combineEnvs(envs) {
    return (c) => env_1.Resume.create((cb) => {
        const hasValues = Array(envs.length).fill(false);
        const values = Array(envs.length);
        const disposable = disposable_1.Disposable.lazy();
        function onValue(value, index) {
            hasValues[index] = true;
            values[index] = value;
            if (hasValues.every(Boolean)) {
                disposable.addDisposable(cb(values));
            }
            return disposable_1.Disposable.None;
        }
        for (let i = 0; i < envs.length; ++i) {
            disposable.addDisposable(env_1.runEnv((value) => onValue(value, i), c, envs[i]));
        }
        return disposable;
    });
}
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