LimeSurvey 2.0a (our latest development release) is based on the CodeIgniter framework. Unfortunately the CodeIgniter license is not compatible to the LimeSurvey GPL license so we need to port the LimeSurvey codebase to a new framework, Yii. We need your help to do this.

General Steps:

• Install a subversion client and download LimeSurvey 2.0a (that's the version still based on CodeIgniter) using subversion and install it by running http://<yourserver>/limesurvey/index.php/admin
• Do the same with the new LimeSurvey development branch based on Yii. There is no installer yet so just point the database configuration in /application/config.php to the database you created in step 1.
• Check out the functionality named in this task title in the CI version. If you have problems to find it please get in touch with us on IRC. #limesurvey@freenode.org
• Check out the source code and then port the functionality to Yii.
• Test the new functionality in the Yii version thoroughly.
• Submit a patch created with subversion and based on the YII branch to this task idea and wait for feedback.

Specific Steps for This Task

• Review the Expression Manager (EM) documentation and survey-building how-tos, and notes for developers.
• For this task, specifically port the following from the _ci branch:
• /application/helpers/expressions/*.php
• /views/admin/expressions/test.php and ./test/*.php
• /models/*.php - those that are called by LimeExpressionManager
• /scripts/admin/expressions/*.js
• /application/config/routes.php - so that appropriate security is applied to the expressions tests
• Ensure that the Yii port and _CI branch tests produce identical results.
• For this task, there is no need to integrate EM into LimeSurvey - just to get its stand-alone testing framework working.

Requirements:

• Good PHP knowledge
• Experience with a PHP MVC framework

Note:

• We want a straight port. Don't start to rewrite big portions of the code.
• If you can clean up the models it would be great but it is not necessary.
• It is important that you test your ported code thoroughly before you submit the patch. This will save you and us alot of time. It will take longer to accept your patch if you did not test.