gistfile1.txt

// inject $rootScope into application when we bootstrap
// call below line of code when save is called after
// client has been switched (ie. we have called the re-assign dialog and user clicked continue)

$rootScope.$broadcast('clientChange');

app.controller('MainCtrl', function MainCtrl() {
    $scope.MainClientSelected = {};
    $scope.Client2Selected = {};

    function updateDependants(users) {
        $scope.current_users = users.users;
        $scope.$apply();
    }
    
    function updateStockOptions(users) {
        $scope.current_users = users.users;
        $scope.$apply();
    }
    
    // add more functions for each section that depends on client change


    $scope.$on('clientChange', function (evt, users) { 
      updateDependants(users); 
      updateStockOptions(users);
    });
});