pogojs/dist/pogoStreams.js

Library to accompany the Pogo stack

"use strict";

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.unsubscribe = exports.subscribe = exports.publish = undefined;

var _pogoState = require("./pogoState");

var _arrayContainsFunction = require("./utils/arrayContainsFunction");

var _arrayContainsFunction2 = _interopRequireDefault(_arrayContainsFunction);

var _arrayContainsString = require("./utils/arrayContainsString");

var _arrayContainsString2 = _interopRequireDefault(_arrayContainsString);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var subscribers = {};

var isAlreadySubscribed = function isAlreadySubscribed(stream, cb, callerId) {
    return (0, _arrayContainsString2.default)(subscribers[stream].callers, callerId) && (0, _arrayContainsFunction2.default)(subscribers[stream].callbacks, cb);
};

function subscribe(streams, cb, callerId) {
    var subs = streams.trim().split(/\s+/);
    subs.map(function (stream) {
        subscribers[stream] = subscribers[stream] || {
            callbacks: [],
            callers: []
        };
        // Prevent functions being subscribed multiple times
        if (!isAlreadySubscribed(stream, cb, callerId)) {
            subscribers[stream].callers.push(callerId);
            subscribers[stream].callbacks.push(cb);
        }
    });
}

function unsubscribe(stream, cb) {
    var subs = subscribers[stream].callers || [];

    subs.map(function (s, i) {
        if (subscribers[stream].callbacks[i] === cb) {
            subscribers[stream].callbacks[i].splice(i, 1);
        }
    });
}

function publish() {
    for (var _len = arguments.length, streams = Array(_len), _key = 0; _key < _len; _key++) {
        streams[_key] = arguments[_key];
    }

    streams.map(function (stream) {
        if (subscribers[stream]) {
            var callbacks = subscribers[stream].callbacks || [];
            callbacks.map(function (cb) {
                cb(_pogoState.pogoState[stream] || {});
            });
        }
    });
}

exports.publish = publish;
exports.subscribe = subscribe;
exports.unsubscribe = unsubscribe;