node-jet/lib/3_jet/peer/fetcher.js

Jet Realtime Message Bus for the Web. Daemon and Peer implementation.

import { EventEmitter } from '../../1_socket/index.js';
import { Subscription } from '../daemon/subscription.js';
export class Fetcher extends EventEmitter {
    message = { id: '' };
    valueRules = {};
    constructor() {
        super();
        this.setMaxListeners(0);
    }
    addListener = (eventName, listener) => {
        super.addListener(eventName, listener);
        return this;
    };
    path = (key, value) => {
        if (!this.message.path) {
            this.message.path = {};
        }
        this.message.path[key] = value;
        return this;
    };
    value = (operator, value, field = '') => {
        if (!this.message.value) {
            this.message.value = {};
        }
        this.message.value[field] = {
            operator,
            value
        };
        return this;
    };
    matches = (path, value) => {
        const sub = new Subscription(this.message);
        return sub.matchesPath(path) && sub.matchesValue(value);
    };
    differential = () => {
        if (!this.message.sort) {
            this.message.sort = {};
        }
        this.message.sort.asArray = false;
        return this;
    };
    ascending = () => {
        if (!this.message.sort) {
            this.message.sort = {};
        }
        this.message.sort.descending = false;
        return this;
    };
    descending = () => {
        if (!this.message.sort) {
            this.message.sort = {};
        }
        this.message.sort.descending = true;
        return this;
    };
    sortByValue = (key = '') => {
        if (!this.message.sort) {
            this.message.sort = {};
        }
        this.message.sort.by = key ? `value.${key}` : 'value';
        return this;
    };
    sortByPath = () => {
        if (!this.message.sort) {
            this.message.sort = {};
        }
        this.message.sort.by = 'path';
        return this;
    };
    range = (_from, _to) => {
        if (!this.message.sort) {
            this.message.sort = {};
        }
        this.message.sort.from = _from;
        this.message.sort.to = _to;
        return this;
    };
}
export default Fetcher;