Mindtonic

  function mysqlTimeStampToDate(timestamp) {
    //function parses mysql datetime string and returns javascript Date object
    //input has to be in this format: 2007-06-05 15:26:02
    var regex=/^([0-9]{2,4})-([0-1][0-9])-([0-3][0-9]) (?:([0-2][0-9]):([0-5][0-9]):([0-5][0-9]))?$/;
    var parts=timestamp.replace(regex,"$1 $2 $3 $4 $5 $6").split(' ');
    return new Date(parts[0],parts[1]-1,parts[2],parts[3],parts[4],parts[5]);
  }

Source: http://snippets.dzone.com/posts/show/4132

To speed up site loading, there are two great plugins for “compressing” your stylesheets and javascript.

The first is bundle-fu. This plugin does not actually compress the files, but rather combines all of the individual documents into one before shipping it out to the client browser.

$ script/plugin install git://github.com/timcharper/bundle-fu.git

And then you simply wrap your sheet and script calls in the bundle method:

  <% bundle do %>
    ...
    <%= javascript_include_tag "prototype" %>
    <%= stylesheet_link_tag "basic.css" %>
    <%= calendar_date_select_includes "red" %>
    
    ...
  <% end %>

The Second plugin, which actually does compress all of your files, is sbecker’s asset_packager. This one is a lot more involved, so check out the github site for more information.

Calendar Date Select is a new(ish) “date and time picker”, developed by Tim Harper, designed primarily for developers to use in Rails applications. It uses the standard Prototype JavaScript library, and is easily installed as a Rails plugin:

script/plugin install http://calendardateselect.googlecode.com/svn/tags/calendar_date_select

The demo seems to be down, but here is some more detailed info: http://ianli.com/site/HowTo/UseCalendarDateSelectRailsPlugin. You can also see the original contents of the demo site about halfway down the Google Code wiki for the project: http://code.google.com/p/calendardateselect/wiki/CalendarDateSelect

On the surface this is a very easy plugin to install and use. It seems the common problem is that there is very little documentation available and the demo server is down. After installing the gem, I was able to run “gem server” and view the rdoc for the plugin. A couple of things I thought would be helpful to repost here:

Form Helpers:

calendar_date_select(object, method, options={})

Similar to the difference between text_field_tag and text_field, this method behaves like text_field

It receives the same options as calendar_date_select_tag. Need for time selection is automatically detected by checking the corresponding column meta information of Model#columns_hash

calendar_date_select_tag( name, value = nil, options = {})

Similar to text_field_tag, but adds a calendar picker, naturally.
Arguments

  +name+ - the html name of the tag
  +value+ - When specified as a string, uses value verbatim.  When Date, DateTime, Time, it converts it to a string basd off the format set by CalendarDateSelect#format=
  +options+ - ...

Options
:embedded

Put the calendar straight into the form, rather than using a popup type of form.

  <%= calendar_date_select_tag "name", "2007-01-01", :embedded => true %>

:hidden

Use a hidden element instead of a text box for a pop up calendar. Not compatible with :embedded => true. You‘ll probably want to use an onchange callback to do something with the value.

  
  <%= calendar_date_select_tag "hidden_date_selector", "", :hidden => "true", :onchange => "$('cds_value').update($F(this));" %>

:image

Specify an alternative icon to use for the date picker.

To use /images/groovy.png:

  <%= calendar_date_select_tag "altered_image", "", :image => "groovy.png" %>

:minute_interval

Specifies the minute interval used in the hour/minute selector. Default is 5.

  <%= calendar_date_select_tag "month_year_selector_label", "", :minute_interval => 15 %>

:month_year

Customize the month and year selectors at the top of the control.

Valid values:

 * "dropdowns" (default) - Use a separate dropdown control for both the month and year
 * "label" - Use static text to show the month and the year.

   <%= calendar_date_select_tag "month_year_selector_label", "", :month_year => "label" %>

:popup => ‘force‘

Forces the user to use the popup calendar by making it‘s text-box read-only and causing calendar_date_select to override it‘s default behavior of not allowing selection of a date on a target element that is read-only.

  <%= calendar_date_select_tag "name", "2007-01-01", :popup => "force" %>

:time

Show time in the controls. There‘s three options:

 * +true+ - show an hour/minute selector.
 * +false+ - don't show an hour/minute selector.
 * +"mixed"+ - Show an hour/minute selector, but include a "all day" option - allowing them to choose whether or not to specify a time.

:year_range

Limit the year range. You can pass in an array or range of ruby Date/Time objects or FixNum‘s.

  <%= calendar_date_select_tag "e_date", nil, :year_range => 10.years.ago..0.years.from_now %>
  <%= calendar_date_select_tag "e_date", nil, :year_range => [0.years.ago, 10.years.from_now] %>
  <%= calendar_date_select_tag "e_date", nil, :year_range => 2000..2007 %>
  <%= calendar_date_select_tag "e_date", nil, :year_range => [2000, 2007] %>

CALLBACKS

The following callbacks are available:

 * before_show / after_show
 * before_close / after_close
 * after_navigate - Called when navigating to a different month. Passes first parameter as a date object refering to the current month viewed
 * onchange - Called when the form input value changes

  <%= calendar_date_select_tag "event_demo", "",
    :before_show => "log('Calendar Showing');" ,
    :after_show => "log('Calendar Shown');" ,
    :before_close => "log('Calendar closing');" ,
    :after_close => "log('Calendar closed');",
    :after_navigate => "log('Current month is ' + (param.getMonth()+1) + '/' + (param.getFullYear()));",
    :onchange => "log('value changed to - ' + $F(this));"

}}}

All callbacks are executed within the context of the target input element. If you‘d like to access the CalendarDateSelect object itself, you can access it via "this.calendar_date_select".

For example:

  <%= calendar_date_select_tag "event_demo", "", :after_navigate => "alert('The current selected month is ' + this.calendar_date_select.selected_date.getMonth());" ,

For use with Form Builders

calendar_date_select(method, options = {})

Controllers:

In my application, I am using a custom form builder, so I used the calendar_date_elect with the form builder. The options hash appears to be the same as in the other view tags, so I just passed along what I needed:

<%= f.calendar_date_select "date", :embedded => true, :year_range => 1.year.ago..5.years.from_now, :time => false %>

I was pleased to discover that, utilizing some of the magic of Rails, the date property on my event was automatically turned into a datetime attribute, and on editing, was reloaded into the calendar as expected.