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#+TITLE: Remote Snake API
#+OPTIONS: toc:nil
#+LATEX_HEADER: \usepackage{fullpage}
* General Description
- All transmissions will be based on UDP
- All UDP packet will contain plain json data
* Communications
** Initialisation
1. Server wait for a client
2. Client can send:
#+BEGIN_SRC json
{
"type": "new-game"
}
#+END_SRC
3. Server can reply:
#+BEGIN_SRC json
{
"type": "state",
"game-id": 1,
"game-over": false,
"snake": [(1,2),(1,3)],
"food": [(6,7)]
}
#+END_SRC
** Gameplay
*** Change Direction
1. When client is playing a game it can ask to the server to change snake direction:
#+BEGIN_SRC json
{
"type": "update",
"game-id": 1,
"direction": "left",
}
#+END_SRC
2. Server can reply
#+BEGIN_SRC json
{
"type": "state",
"game-id": 1,
"game-over": false,
"snake": [(0,2),(1,2)],
"food": [(6,7)]
}
#+END_SRC
*** Refresh Screen
1. When no key are press (the snake is simply going straigth forward). So, client can send:
#+BEGIN_SRC json
{
"type": "update",
"game-id": 1,
"direction": null
}
#+END_SRC
2. Server can reply:
#+BEGIN_SRC json
{
"type": "state",
"game-id": 1,
"game-over": false,
"snake": [(1,2),(0,2)],
"food": [(6,7)]
}
#+END_SRC
*** End Game
- When game is over server will send the following state message (switch game-over to true):
#+BEGIN_SRC json
{
"type": "state",
"game-id": 1,
"game-over": true,
"snake": [(0,2),(1,2)],
"food": [(6,7)]
}
#+END_SRC
- No reply is expected from the client and server will be in charge to free local memory
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