An API to store tic-tac-toe game state and let two players compete across the internet. It allows players to register as users of the API and play against other registered users.
The API does not currently validate game states.
| Verb | URI Pattern | Controller#Action |
|---|---|---|
| POST | /login |
users#login |
| POST | /users |
users#create |
| GET | /games |
games#index |
| POST | /games |
games#create |
| GET | /games/:id |
games#show |
| PATCH | /games/:id |
games#update |
| GET | /games/:id/watch |
games#watch |
All API actions that expect data in the request body require JSON, Content-Type:application/json; charset=utf-8, and returned data in the response body, if any, will also be JSON.
Summary:
| Request | Response | |||
|---|---|---|---|---|
| Verb | URI | body | Status | body |
| POST | `/login` | credentials | 200, OK | token |
| 401, Unauthorized | empty | |||
| POST | `/users` | credentials | 201, Created | user |
| 400, Bad Request | empty | |||
The login action expects a POST with credentials identifying a previously registered user, e.g.:
{
"credentials": {
"email": "[email protected]",
"password": "an example password"
}
}If the request is successful, the response will have an HTTP Status of 200, OK, and the body will be JSON containing the user's id, email, and the token used to authenticate other requests, e.g.:
{
"user": {
"id": 1,
"email": "[email protected]",
"token": "an example authentication token"
}
}If the request is unsuccessful, the response will have an HTTP Status of 401, Unauthorized, and the response body will be empty.
The create action expects a POST of credentials identifying a new user to create, e.g.:
{
"credentials": {
"email": "[email protected]",
"password": "an example password",
"password_confirmation": "an example password"
}
}If the request is successful, the response will have an HTTP Status of 201, Created, and the body will be JSON containing the id and email of the new user, e.g.:
{
"user": {
"id": 1,
"email": "[email protected]"
}
}If the request is unsuccessful, the response will have an HTTP Status of 400, Bad Request, and the response body will be empty.
All games action requests must include a valid HTTP header Authorization: Token token=<token> or they will be rejected with a status of 401, Unauthorized.
Games are associated with users, player_x and player_o. Actions, other than update, will only retrieve a game if the user associated with the Authorization header is one of those two users. If this requirement is unmet, the response will be 404, Not Found, except for the index action which will return an empty games array.
Summary:
| Request | Response | |||
|---|---|---|---|---|
| Verb | URI | body | Status | body |
| GET | `/games[?over=]` | n/a | 200, OK | games found |
| The optional `over` query parameter restricts the response to games with a matching `over` property. | 200, OK | empty games | ||
| The default is to retrieve all games associated with the user.. | 401, Unauthorized | empty | ||
| POST | `/games` | n/a | 201, Created | game created |
| 401, Unauthorized | empty | |||
| 400, Bad Request | errors | |||
| GET | `/games/:id` | n/a | 200, OK | game found |
| 401, Unauthorized | empty | |||
| 404, Not Found | empty | |||
| PATCH | `/games/:id` | empty | 200, OK | game joined |
| 400, Bad Request | errors | |||
| 400, Bad Request | empty | |||
| PATCH | `/games/:id` | game delta | 200, OK | game updated |
| 400, Bad Request | errors | |||
| 404, Not Found | empty | |||
The index action is a GET that retrieves all the games associated with a user. The response body will contain JSON containing an array of games, e.g.:
{
"games": [
{
"id": 1,
"cells": ["o","x","o","x","o","x","o","x","o"],
"over": true,
"player_x": {
"id": 1,
"email": "[email protected]"
},
"player_o": {
"id": 3,
"email": "[email protected]"
}
},
{
"id": 2,
"cells": ["","","","","","","","",""],
"over": false,
"player_x": {
"id": 3,
"email": "[email protected]"
},
"player_o": {
"id": 1,
"email": "[email protected]"
}
}
]
}If the over query parameter is specified the results will be restricted accordingly.
If there are no games associated with the user, the response body will contain an empty games array, e.g.:
{
"games": [
]
}The create action expects a POST with an empty JSON request body, {}. If the request is successful, the response will have an HTTP Status of 201, Created, and the body will contain JSON of the created game with player_x set to the user calling create, e.g.:
{
"game": {
"id": 3,
"cells": ["","","","","","","","",""],
"over": false,
"player_x": {
"id": 1,
"email": "[email protected]"
},
"player_o": null
}
}If the request is unsuccessful, the response will have an HTTP Status of 400, Bad Request, and the response body will be JSON describing the errors.
The show action is a GET specifing the id of the game to retrieve. If the request is successful the status will be 200, OK, and the response body will contain JSON for the game requested, e.g.:
{
"game": {
"id": 1,
"cells": ["o","x","o","x","o","x","o","x","o"],
"over": true,
"player_x": {
"id": 1,
"email": "[email protected]"
},
"player_o": {
"id": 3,
"email": "[email protected]"
}
}
}This update action expects an empty JSON, {} PATCH, to join an existing game.
If the request is successful, the response will have an HTTP Status of 200, OK, and the body will be JSON containing the game joined, e.g.:
{
"game": {
"id": 1,
"cells": ["","","","","","","","",""],
"over":false,
"player_x": {
"id": 1,
"email": "[email protected]"
},
"player_o": {
"id": 3,
"email":
"[email protected]"
}
}
}If the request is unsuccessful, the response will have an HTTP Status of 400, Bad Request, and the response body will be empty (game cannot be joined, player_o already set or user making request is player_x) or JSON describing the errors.
This update action expects a PATCH with changes to to an existing game, e.g.:
{
"game": {
"cell": {
"index": 0,
"value": "x"
},
"over": false
}
}If the request is successful, the response will have an HTTP Status of 200, OK, and the body will be JSON containing the modified game, e.g.:
{
"game": {
"id": 1,
"cells": ["x","","","","","","","",""],
"over":false,
"player_x": {
"id": 1,
"email": "[email protected]"
},
"player_o": {
"id": 3,
"email":
"[email protected]"
}
}
}If the request is unsuccessful, the response will have an HTTP Status of 400, Bad Request, and the response body will be JSON describing the errors.
The watch action is handled differently than all the others. Because watch implements a streaming source of data, we'll use a wrapper around the html5 object EventSource to handle the events sent.
You can find the wrapper here. The wraper is also available from the deployed app at the path /js/resource-watcher-0.1.0.js.
The events that watch implements let you know when a game has been updated. By using this interface you can write code that lets a player see another's move almost as it happens. Updates to the game from one player's browser are sent to the other's browser.
You create a watcher object using the resourceWatcher function. This function takes two parameters, the watch url and a configuration object which must contain the Authorization token, and may contain an optional timeout in seconds, e.g.:
var gameWatcher = resourceWatcher('<server>/games/:id/watch', {
Authorization: 'Token token=<token>'[,
timeout: <timeout>]
});The watched resource has a default timeout of 120 seconds.
You should add a handler for change and error events. The error events are not the most informative. The change event may return a timeout.
game.on('change', function(d){
var data = JSON.parse(d);
if (data.timeout) { //not an error
game.close();
return console.warn(data.timeout);
}
var gameData = data.game;
var cell = gameData.cell;
var index = cell.index
var value = cell.value;
});
game.on('error', function(e){
console.error(e);
});