@connectv/core/dist/es6/agent/gate.js

agent-based reactive programming library for typescript/javascript

import { Control } from '../pin/control';
import map from '../pin/map';
import filter from '../pin/filter';
import group from '../pin/group';
import { Agent } from './agent';
/**
 *
 * Represents [gate](https://connective.dev/docs/gate) agents.
 *
 */
export class Gate extends Agent {
    constructor() {
        super({ inputs: ['value'], outputs: ['value'] });
        this._control = new Control();
    }
    /**
     *
     * Shortcut for `.in('value')`, the input pin receiving values.
     * [Read this](https://connective.dev/docs/gate#signature) for more details.
     *
     */
    get input() { return this.in('value'); }
    /**
     *
     * Shortcut for `.out('value')`, the output emitting allowed values.
     * [Read this](https://connective.dev/docs/gate#signature) for more details.
     *
     */
    get output() { return this.out('value'); }
    /**
     *
     * Each pin connected to this pin should emit a boolean value for each
     * value sent to `.input`, and if all are true, the value is emitted via `.output`.
     * [Read this](https://connective.dev/docs/gate) for more details.
     *
     */
    get control() { return this._control; }
    createOutput(label) {
        this.checkOutput(label);
        return group(this.control, this.input)
            .to(new Control())
            .to(filter(([ctrl, _]) => ctrl.every(signal => !!signal)))
            .to(map(([_, input]) => input));
    }
    createEntries() { return [this.input]; }
    createExits() { return [this.output]; }
    clear() {
        this.control.clear();
        return super.clear();
    }
}
/**
 *
 * Creates a [gate](https://connective.dev/docs/gate) agent.
 * Gate agents await a control signal for each incoming value and either pass it along
 * or drop it based on the boolean value of the control signal.
 * [Checkout the docs](https://connective.dev/docs/gate) for examples and further information.
 *
 */
export function gate() { return new Gate(); }
export default gate;
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