angular ObserverService

gistfile1.txt

(function () {
    angular
        .module('myApp')
        .service('ObserverService', ObserverService);

    function ObserverService () {
        var vm = this;
        vm.data = {};
        vm.callbacks = {};


        vm.set = function (key, value) {
            vm.data[key] = value;
            vm.notify(key);
        };

        vm.get = function (key) {
            return vm.data[key];
        };

        vm.notify = function (key) {
            if (vm.callbacks[key] !== undefined) {
                for (var i = 0; i < vm.callbacks[key].length; i++) {
                    var data = vm.data[key];
                    vm.callbacks[key][i](data);
                }
            }
        };

        vm.listen = function (key, func) {
            if (vm.callbacks[key] === undefined) {
                vm.callbacks[key] = [];
            }
            vm.callbacks[key].push(func);
        };

        vm.clearAll = function () {
            var keys = Object.keys(vm.data);
            keys.map(function(key){
                vm.data[key] = null;
                vm.notify(key);
            });
            return true;
        }

    }

}());