@tempest/core/lib/Stream.js

The core of the Tempest Stream Library

import $$observable from 'symbol-observable';
import { Multicast } from './multicast/Multicast';
import { isArrayLike } from './util/array';
import { BasicSubscription } from './util/BasicSubscription';
import { SubscriberSink } from './util/SubscriberSink';
import { FromArraySource } from './source/fromArray';
import { FromObservableSource } from './source/fromObservable';
export class Stream {
    constructor(source) {
        this.source = new Multicast(source);
    }
    static from(input) {
        if (typeof input[$$observable] === 'function') {
            return new Stream(new FromObservableSource(input));
        }
        else if (isArrayLike(input)) {
            return new Stream(new FromArraySource(input));
        }
        else {
            throw new Error('Stream can only be made from an Observable or ArrayLike object');
        }
    }
    static of(...items) {
        return Stream.from(items);
    }
    subscribe(nextOrSubscriber, error, complete) {
        let _next = Function.prototype;
        let _error = Function.prototype;
        let _complete = Function.prototype;
        if (nextOrSubscriber !== null && typeof nextOrSubscriber === 'object') {
            const subscriber = nextOrSubscriber;
            const { next, error, complete } = subscriber;
            if (next && typeof next === 'function')
                _next = next;
            if (error && typeof error === 'function')
                _error = error;
            if (complete && typeof complete === 'function')
                _complete = complete;
        }
        else if (typeof nextOrSubscriber === 'function') {
            _next = nextOrSubscriber;
            if (error && typeof error === 'function')
                _error = error;
            if (complete && typeof complete === 'function')
                _complete = complete;
        }
        return BasicSubscription.create(this.source, SubscriberSink.create(_next, _error, _complete));
    }
    [$$observable]() {
        return this;
    }
}
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