Hi, I want to make a messaging program that is similar to slack.com. I plan to release as open source when completed. The messager needs these fea

Hi, I want to make a messaging program that is similar to slack.com. I plan to release as open source when completed. The messager needs these features: -channels, private messages -Admin center to control accounts - Admin can access all peoples message / login as them - show when people are online - google file uploader - be able to transfer files images, docs, etc -be about to use # and other references similar to slack. -profiles. - good ui -normal messaging features. - all message archive - every users client gets all message and syncs better devices - presences shifting -active directory / ldap. - past image in message box and send - read recipients - Mobile app for both ios and android with notifications - responsive design - in message commands and references - all docs have editing with etherpad - all files are saved and stored in seafile - Channels should have 3 modes open, need approval, invisible invite only. - Requires search box with open source index server to search all chats, channels and groups. . - polls - integrate round cube or other opensource email client as as seamless tab, unified design and same notification as messages style. You can us any open source solution to solve any feature even if i didn't say and you can suggest alternatives to the ones i did mention.