gistfile1.js

// duplicates the current functionality
settingsCheck({
    askUrl: '/settings/todo/ready',
    formUrl: '/settings/todo/edit',
    selector: 'a.new-todo',
    event: 'click',
    defaultAction: function() {
      $("a.new-todo").live('click', function(){
        $("#" + $(this).attr('rel')).toggle('fast');
        return false;
      });
    },
    clear: function() {
      $("a.new-todo").die('click');
    }
  });

//Where the magic happens

/*
  "Intercepts" actions that need configuration before they can be completed.
  For example, new todo links are put on the page, but the user may have to set their
  time zone and phone number. So when the click on a new todo link, it should either
  give them a modal box to update their information or display the form.
  
  This method encapsulates this pattern:
    1. Ask the server a boolean question where the answer should be yes
    2. If yes, go about your business.
    3. If No,
      4. (click events should do something else)
      5. Click should now open a modal box with a form
      6. Load some form into the modal box
      7. Ajaxify the form
      8. When the user submits the form and it's a
        9. Success: do what you were originally going to do in step 2
        10. Invalid: display errors and wait for the user to resubmit
        
  In the new todo context, clicking a new todo link is the event we want to intercept.
  
  The method takes one agrument: the settings object. Here are the default settings:
    invalidForm: function(form, errors) { $(form).formtasticErrors(errors) },
    
  The here are the available settings:
    askUrl: url to get. default action is applied when the server answers in 2xxx
    formUrl: url of the settings update form
    event: event to listen on.
    selector: used to apply $(selector).live(event, function()) {}
    invalidForm: function(form, errors) {} // form is a dom object for the form inside the facebox. errors is an array of erros
    defaultAction: function() {} //What you want to do by default
    clear: function() { } //Used to unbind the old event
    
    
  A real life example:
    $(function() {
      settingsCheck({
        askUrl: '/settings/todo/ready',
        formUrl: '/settings/todo/edit',
        selector: 'a.new-todo',
        event: 'click',
        defaultAction: function() {
          $("a.new-todo").live('click', function(){
            $("#" + $(this).attr('rel')).toggle('fast');
            return false;
          };
        },
        clear: function() {
          $("a.new-todo").die('click');
        }
      });
    });
  
*/

settingsCheck = function(options) {
  var defaults = {
    invalidForm: function(form, errors) { $(form).formtasticErrors(errors) },
  };
  
  var config = $.extend(defaults, options);
  
  console.log(config);
  
  $.ajax({
    dataType: 'html',
    type: 'get',
    url: config.askUrl,
    beforeSend: function(xhr) { console.log('checking settings...');},
    complete: function(xhr, status) {
      if(status != 'success') { // todo links should do something else
        $(config.selector).live(config.event, function() {
          $.facebox(function() {
            $.get(config.formUrl, function(data) { 
              $.facebox(data)
              $("#facebox input[type='submit']").button();
              $("#facebox form").submit(function(){
                var form = this;
                $.ajax({ 
                  dataType: 'json',
                  type: $(form).attr('method'),
                  url: $(form).attr('action'),
                  data: $(form).serialize(),
                  complete: function(update_xhr, update_status) {
                    if(update_status == 'success') {
                      $(document).trigger('close.facebox');
                      config.clear();
                      config.defaultAction();
                    } else {
                      config.invalidForm(form, $.parseJSON(update_xhr.responseText));
                    }
                  }
                });
                return false;
              });
            });
          });
          return false;
        });
      } else { // todo links can show the todo form
        config.defaultAction();
      }
    }
  });
  
};