ocm_mercurius_messenger/dist/messenger.js

Exchange Messages using Sub-Pub-Pattern

"use strict";

Object.defineProperty(exports, "__esModule", {
	value: true
});

var _createSubscriber2 = require("./createSubscriber");

var _createSubscriber3 = _interopRequireDefault(_createSubscriber2);

var _subscriptionTypes2 = require("./subscriptionTypes");

var _subscriptionTypes3 = _interopRequireDefault(_subscriptionTypes2);

var _createPublication2 = require("./createPublication");

var _createPublication3 = _interopRequireDefault(_createPublication2);

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

var _idCount = 0;
var _subscribers = {};
var _latestPublications = {};

var _getSubscriberPublicationTypeById = function _getSubscriberPublicationTypeById(id) {
	return Object.keys(_subscribers).find(function (publicationType) {
		if (_subscribers[publicationType][id]) {
			return publicationType;
		}
	});
};

var _addSubscriberAndReturnID = function _addSubscriberAndReturnID(publicationType, subscriber) {
	var id = _idCount++;
	_checkAndCreatePublicationType(publicationType);
	var existingSubscriberID = _checkForExistence(publicationType, subscriber);
	if (existingSubscriberID) return existingSubscriberID;
	_subscribers[publicationType][id] = subscriber;
	return id;
};

var _checkAndCreatePublicationType = function _checkAndCreatePublicationType(publicationType) {
	if (typeof _subscribers[publicationType] === "undefined") {
		_subscribers[publicationType] = {};
	}
};

var _checkForExistence = function _checkForExistence(publicationType, subscriber) {
	var subscriberID = null;
	var newSubscriber = subscriber;
	var subscribersForPublicationType = _subscribers[publicationType];
	for (var subscriberItem in subscribersForPublicationType) {
		if (subscribersForPublicationType.hasOwnProperty(subscriberItem) && subscribersForPublicationType[subscriberItem].callback === newSubscriber.callback) {
			subscriberID = subscriberItem;
		}
	}
	return subscriberID;
};

var _publishLatest = function _publishLatest(publicationType, subscriberID) {
	if (_latestPublications[publicationType] && _subscribers[publicationType][subscriberID]['options'][_subscriptionTypes3.default.REACT_TO_LATEST]) {
		_subscribers[publicationType][subscriberID].handleLatestpublication(_latestPublications[publicationType]);
		_removeSubscriberReactOnlyOnce(publicationType, subscriberID);
	}
	return true;
};

var _removeSubscriberReactOnlyOnce = function _removeSubscriberReactOnlyOnce(publicationType, itemKey) {
	if (_subscribers[publicationType][itemKey]['options'][_subscriptionTypes3.default.REACT_ONLY_ONCE]) delete _subscribers[publicationType][itemKey];
};

var _removeSubscriber = function _removeSubscriber(publicationType, itemKey) {
	if (publicationType && itemKey !== undefined && _subscribers[publicationType][itemKey] !== undefined) {
		delete _subscribers[publicationType][itemKey];
	}
};

var messenger = {
	subscriptionTypes: _subscriptionTypes3.default,
	subscribe: function subscribe(publicationType, callback, options) {
		var subscriber = (0, _createSubscriber3.default)(callback, options);
		var subscriberID = _addSubscriberAndReturnID(publicationType, subscriber);
		_publishLatest(publicationType, subscriberID);
		return subscriberID;
	},
	unsubscribe: function unsubscribe(subscriberID) {
		var publicationType = _getSubscriberPublicationTypeById(subscriberID);
		_removeSubscriber(publicationType, subscriberID);
		return true;
	},
	publish: function publish(publicationType, publicationData) {
		var subscribersForPublicationType = _subscribers[publicationType];
		var publication = (0, _createPublication3.default)(publicationData);
		for (var itemKey in subscribersForPublicationType) {
			if (subscribersForPublicationType.hasOwnProperty(itemKey)) {
				var singleSubscriber = subscribersForPublicationType[itemKey];
				singleSubscriber.handlepublication(publication);
				_removeSubscriberReactOnlyOnce(publicationType, itemKey);
			}
		}
		// Remember publication
		_latestPublications[publicationType] = publication;
		return true;
	}
};

exports.default = messenger;