This is Brittney Johnson's Slack Application Engineering: Technical Exercise. Although there are many possible improvements, it meets all the requirements given (including the time constraints of a busy student).
/tttor/ttt help- List available commands/ttt challenge- Start a new tic tac toe game in the channel (overriding the last game played in the channel)/ttt move- Make a move! Options are UL,UM,UR,ML,MM,MR,LL,LM,LR, which stand for upper left, upper middle, upper right, middle left, middle middle, middle right, lower left, lower middle, lower right/ttt show- Display the current board and see whose turn it is
- Users can create a new game in any Slack channel by challenging another user (using their @username).
- A channel can have at most one game being played at a time.
- Anyone in the channel can run a command to display the current board and list whose turn it is.
- Users can specify their next move, which also publicly displays the board in the channel after the move with a reminder of whose turn it is.
- Only the user whose turn it is can make the next move.
- When a turn is taken that ends the game, the response indicates this along with who won.
- More modular design: the tic tac toe boards should really be their own objects, with functions abstracted away rather than rewritten with slight changes across the commands.
- Bot to play against: it would be nice to have someone to play against, and implementing minimax on this would be quick.
- More games, more fun: tic tac toe can be extended to games like connect four without too much change
https://github.com/mattcreager/starbot, for providing a structure I used to bootstrap handling slash commands.