Modal which preserves unique url via query, best with with routeProvider's reloadOnSearch: false

ModalUrl

angular.module("services").factory('ModalUrl', [
  '$rootScope', '$modal', '$location', '$routeParams', '$window', '$timeout',
  ($rootScope, $modal, $location, $routeParams, $window, $timeout) ->
    modalInstance = null
    checkModal = () ->
      modalParam = decodeURIComponent($routeParams.modal)
      if (modalParam != 'undefined')
        optionsParam = decodeURIComponent($routeParams.options)
        if (optionsParam != 'undefined')
          options = JSON.parse(optionsParam)
        else
          options = {}
        modalInstance = $modal.open(
          templateUrl: "modal/#{modalParam}"
          controller: 'ModalUrlCtrl'
          windowClass: options.windowClass
          resolve:
            options: () -> options
        )
        modalInstance.result.then(null, ()->
          for key in ['modal', 'options']
            delete $location.$$search[key]
          $location.$$compose();
          $modalInstance = null
        )
      else
        modalInstance.dismiss('finished') if modalInstance?
      return

    checkModal()

    $rootScope.$on('$routeUpdate', (event) -> checkModal())

    showModal = (modalToShow, options) ->
      explicitlyOpened = true
      params = {modal: modalToShow, options: JSON.stringify(options)}
      $timeout () -> $location.search(params)

    {show: showModal}
])
angular.module("controllers").controller('ModalUrlCtrl', [
  '$scope', '$modalInstance', 'options', ($scope, $modalInstance, options) ->
    $scope.data = options.data
])