student project in "yii"

Developing a Yii application which contains the following features: The system should be open to public access through the internet. Any internet user can create a private account (username and password). The owner of each account will be able to have other users joining his account. The account owner may define separate groups and catalogue different registered users in them. A discussion may exist in any group: comprised of posts and comments to the posts. Only group members are permitted to take part of such discussion. The account owner may define individual users as group administrators. An administrator will have permission to delete and edit all the posts confined to his group. One may edit or delete his own primary post while no comments are made about it. Anyone who wrote a comment may edit or delete it. The project's steps: 1. Creating an accurate and detailed definition of the system schematic database. 2. Creating a definition of virtual windows in regular version and graphic version. 3. Planning the functions. 4. Planning the situations' diagram. 5. Planning the authorization system in RBAC method – presenting the hierarchy. 6. Constructing the application in Yii.