chat plugin

Hello, I am Ryan Heo from Sough Korea. Currently, I am working on developing chat plugin. In Korea, there is the CMS made by PHP + MYSQL, which is similar to Wordpress. My aim is to make a chat plugin that will be applied to this CMS. Functions I want to develop are as follows: 1. Group chat 2. 1 on 1 chat 3. Sending privacy messages 4. Chat in a certain group of member such as gold group, silver group, bronze group etc. People can select the group members that can be participated in. 5. Possible to restrict someone or ip address. 6. Delete content of conversation in DB after a certain period of time (1 month, 6 month, and etc.). In addition, there should be a check box to select whether a person save the content of conversation. These functions should be possible to be adjusted by not only homepage administrative but also designated members. In addition to this major function, I want you to give information of this chat plugin. 1. Table that is only for chat can be created in Mysql. (chat setting table, chat-content save table) 2. This CMS has table for members. All members have grade from 0 to 10. If you regard visitor as grade 0, then a member who joins this homepage can be grade 1. Homepage administrative is grade 10. Other member grade can be adjusted properly, homepage administrative can change the grade of members. 3. This CMS has already developed php function. For example, information of members can be loaded from DB. You can use it. 4. Please think about easiest way. I am that expert in this field, thus; I just write important things in my mind. I think we can discuss and develop good chat plugin together. I am not accustomed to English. Actually, I normally depend on friends and Google translator. Please understand my English and I am looking forward to your many suggestion. I am waiting for your guys’ good help and advice. Best Regards,