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

agent-based reactive programming library for typescript/javascript

import { map, share } from 'rxjs/operators';
import emission from '../shared/emission';
import createRandomTag from '../util/random-tag';
import { Pipe } from './pipe';
const _DefaultForkTagLength = 10;
/**
 *
 * Represents [fork](https://connective.dev/docs/fork) pins.
 *
 */
export class Fork extends Pipe {
    constructor(len = _DefaultForkTagLength) {
        super([
            map(e => {
                let __fork = [].concat(e.context.__fork || []);
                __fork.push(Fork._create_fork_tag(len));
                return emission(e.value, Object.assign({}, e.context, { __fork }));
            }),
            share(),
        ]);
    }
    static _create_fork_tag(len = _DefaultForkTagLength) {
        return createRandomTag(len);
    }
}
/**
 *
 * Creates a [fork](https://connective.dev/docs/fork) pin.
 * [Checkout the docs](https://connective.dev/docs/fork) for examples and further information.
 *
 * @param len the length of the fork-tag that will be added to the context of each emission.
 *
 */
export function fork(len = _DefaultForkTagLength) { return new Fork(len); }
export default fork;
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