@connectv/core/dist/es6/pin/pin.js

agent-based reactive programming library for typescript/javascript

import { merge } from 'rxjs';
import { Connectible } from './connectible';
/**
 *
 * Represents the basic [pin](https://connective.dev/docs/pin) object.
 * This pin type gets locked when its observable is realized,
 * will resolve only when its observable is not realized and its resolution
 * will be merged observable of all of the incoming pins' observables.
 *
 */
export class Pin extends Connectible {
    /**
     *
     * Determines if this pin is locked, based on whether or not its underlying
     * observable has been resolved or not.
     *
     * @param observable
     *
     */
    isLocked(observable) {
        return observable !== undefined;
    }
    /**
     *
     * Determines whether this pin should resolve its underlying observable,
     * based on whether or not its underlying observable has been resolved or not.
     *
     * @param _
     * @param observable
     *
     */
    shouldResolve(_, observable) {
        return observable === undefined;
    }
    /**
     *
     * Resolves its underlying observable, by
     * [mergeing](https://rxjs-dev.firebaseapp.com/api/index/function/merge)
     * corresponding observables of inbound pins.
     *
     * @param inbound
     *
     */
    resolve(inbound) {
        return (inbound.length == 1) ?
            inbound[0].observable :
            merge(...inbound.map(pin => pin.observable));
    }
}
/**
 *
 * Creates a typical [pin](https://connective.dev/docs/pin) object.
 * [Checkout the docs](https://connective.dev/docs/pin) for examples and further information.
 *
 */
export function pin() { return new Pin(); }
export default pin;
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