angular-actioncable/src/services/actionCableController.js

Connect Angular to ActionCable

(function() {
  'use strict';

  angular.module('ngActionCable')
    .factory('ActionCableController', ['$rootScope', 'ActionCableConfig', ActionCableController]);

  function ActionCableController($rootScope, ActionCableConfig) {

    // add a hash of callbacks here that `route_channel` will call on an incoming message.
    // actions format: actions[channelName][dataParams] = [callback1, callback2, ...]
    // e.g. actions["GlobalsData"][JSON.stringify({"responder_id":1})]= [function(message){...}, assignment_2: function(message){...}, ... ]
    var actions = {
      welcome: function(message){
        if (ActionCableConfig.debug) {
          console.log('Willkommen');
        }
      },
      ping: function(message){
        if (ActionCableConfig.debug) {
          console.log('ActionCable ping');
        }
      },

      // Rails5.0.0.beta3 backport
      _ping: function(message){
        if (ActionCableConfig.debug) {
          console.log('ActionCable 5.0.0.beta3 ping');
        }
      },
      confirm_subscription: function(message) {
        var identifier = JSON.parse(message.identifier);
        var channel    = identifier.channel;

        $rootScope.$broadcast('confirm_subscription:' +  channel);

        if (ActionCableConfig.debug) {
          console.log('ActionCable confirm_subscription on channel: ' + message.identifier);
        }
      },
      ws_404: function(message){
        if (ActionCableConfig.debug) {
          console.log('ActionCable route not found: ' + message);
        }
      }
    };

    var routeToActions= function(actionCallbacks, message){
      angular.forEach(actionCallbacks, function(func, id){
        func.apply(null, [message]);
      });
    };

    var route = function(message){
      if (!!actions[message.type]) {
        actions[message.type](message);
        if (message.type == 'ping') methods.after_ping_callback();
      } else if (message.identifier == '_ping') {     // Rails5.0.0.beta3 backport
        actions._ping(message);                       // Rails5.0.0.beta3 backport
        methods.after_ping_callback();                // Rails5.0.0.beta3 backport
      } else if (!!findActionCallbacksForChannel(channel_from(message), params_from(message))) {
        var actionCallbacks= findActionCallbacksForChannel(channel_from(message), params_from(message));
        routeToActions(actionCallbacks, message.message);
      } else {
        actions.ws_404(message);
      }
    };


    function findActionCallbacksForChannel(channelName, params){
      return (actions[channelName] && actions[channelName][params]);
    }

    function channel_from(message){
      if (message && message.identifier) {
        return JSON.parse(message.identifier).channel;
      }
    }

    function params_from(message){
      var paramsData= JSON.parse(message.identifier).data;
      return JSON.stringify(paramsData);
    }

    var methods = {
      post: function(message){
        return route(message);
      },
      actions: actions,
      after_ping_callback: function(){}
    };

    return methods;
  }

})();