Shift Trader

I would like an application made that allows staff to upload shifts from there roster that they are unable to take. The app will have a logon for the user and will use there work email address as primary means of verification. - A complete login profile details will be provided to job winner. When an available shift is submitted by member a push notification will be sent to all other members of the Shift Trader Application. When a member selects the available shift and states that they are availble to take on the shift then it will become temporarily unavailable. The shift will still be viewable but will be amber (orange) in colour to show other members that someone is looking at taking this shift. Available to take = Green Currently unavailable = Orange Picked up = Red Shifts are input into a callender. (Specific shift info will be given to the project winner). Members insert there shifts into the callender and if there is not a 10 hr gap between shifts then the Shift Trader Application will alert the user and not allow the shift to be taken. When the shift has been selected and it is allowed to be taken (All criteria has been met) then the shift givers information and the user taking on the shifts information will be placed into a pdf file (pre made, but info is placed in the blanks) and then the application will send email notification plus document to the appropriate authorities. Minor changes will be updated by myself, any major changes will be conducted by the winner. Application will be submitted through my account and once testing and and acceptance from apple then payment will be released. This is just one of my application ideas