Add a submit handler function for our form
[lmno.games] / empathy / empathy.jsx
1 function undisplay(element) {
2   element.style.display="none";
3 }
4
5 function add_message(severity, message) {
6   message = `<div class="message ${severity}" onclick="undisplay(this)">
7 <span class="hide-button" onclick="undisplay(this.parentElement)">&times;</span>
8 ${message}
9 </div>`;
10   const message_area = document.getElementById('message-area');
11   message_area.insertAdjacentHTML('beforeend', message);
12 }
13
14 /*********************************************************
15  * Handling server-sent event stream                     *
16  *********************************************************/
17
18 const events = new EventSource("events");
19
20 events.onerror = function(event) {
21   if (event.target.readyState === EventSource.CLOSED) {
22     setTimeout(() => {
23       add_message("danger", "Connection to server lost.");
24     }, 1000);
25   }
26 };
27
28 events.addEventListener("game-info", event => {
29   const info = JSON.parse(event.data);
30
31   window.game.set_game_info(info);
32 });
33
34 events.addEventListener("player-info", event => {
35   const info = JSON.parse(event.data);
36
37   window.game.set_player_info(info);
38 });
39
40 events.addEventListener("player-enter", event => {
41   const info = JSON.parse(event.data);
42
43   window.game.set_other_player_info(info);
44 });
45
46 events.addEventListener("player-update", event => {
47   const info = JSON.parse(event.data);
48
49   if (info.id === window.game.state.player_info.id)
50     window.game.set_player_info(info);
51   else
52     window.game.set_other_player_info(info);
53 });
54
55 /*********************************************************
56  * Game and supporting classes                           *
57  *********************************************************/
58
59 function copy_to_clipboard(id)
60 {
61   const tmp = document.createElement("input");
62   tmp.setAttribute("value", document.getElementById(id).innerHTML);
63   document.body.appendChild(tmp);
64   tmp.select();
65   document.execCommand("copy");
66   document.body.removeChild(tmp);
67 }
68
69 function GameInfo(props) {
70   if (! props.id)
71     return null;
72
73   return (
74     <div className="game-info">
75       <span className="game-id">{props.id}</span>
76       {" "}
77       Share this link to invite friends:{" "}
78       <span id="game-share-url">{props.url}</span>
79       {" "}
80       <button
81         className="inline"
82         onClick={() => copy_to_clipboard('game-share-url')}
83       >Copy Link</button>
84     </div>
85   );
86 }
87
88 function PlayerInfo(props) {
89   if (! props.player.id)
90     return null;
91
92   return (
93     <div className="player-info">
94       <span className="players-header">Players: </span>
95       {props.player.name}
96       {props.other_players.map(other => (
97         <span key={other.id}>
98           {", "}
99           {other.name}
100         </span>
101       ))}
102     </div>
103   );
104 }
105
106 function fetch_method_json(method, api = '', data = {}) {
107   const response = fetch(api, {
108     method: method,
109     headers: {
110       'Content-Type': 'application/json'
111     },
112     body: JSON.stringify(data)
113   });
114   return response;
115 }
116
117 function fetch_post_json(api = '', data = {}) {
118   return fetch_method_json('POST', api, data);
119 }
120
121 async function fetch_put_json(api = '', data = {}) {
122   return fetch_method_json('PUT', api, data);
123 }
124
125 class CategoryRequest extends React.Component {
126   constructor(props) {
127     super(props);
128     this.category = React.createRef();
129
130     this.handle_submit = this.handle_submit.bind(this);
131   }
132
133   handle_submit(event) {
134     const category_input = this.category.current;
135     const category = category_input.value;
136
137     /* Prevent the default page-changing form-submission behavior. */
138     event.preventDefault();
139
140     console.log("Do something here with category: " + category);
141   }
142
143   render() {
144     return (
145       <div className="category-request">
146         <h2>Submit a Category</h2>
147         <p>
148           Suggest a category to play with your friends. Don't forget to
149           include the number of items for each person to submit.
150         </p>
151
152         <form onSubmit={this.handle_submit} >
153           <div className="form-field large">
154             <input
155               type="text"
156               id="category"
157               placeholder="6 things at the beach"
158               required pattern=".*[0-9]+.*"
159               title="Category must contain a number"
160               ref={this.category}
161             />
162           </div>
163
164           <div className="form-field large">
165             <button type="submit">
166               Send
167             </button>
168           </div>
169
170         </form>
171       </div>
172     );
173   }
174 }
175
176 class Game extends React.Component {
177   constructor(props) {
178     super(props);
179     this.state = {
180       game_info: {},
181       player_info: {},
182       other_players: [],
183     };
184   }
185
186   set_game_info(info) {
187     this.setState({
188       game_info: info
189     });
190   }
191
192   set_player_info(info) {
193     this.setState({
194       player_info: info
195     });
196   }
197
198   set_other_player_info(info) {
199     const other_players_copy = [...this.state.other_players];
200     const idx = other_players_copy.findIndex(o => o.id === info.id);
201     if (idx >= 0) {
202       other_players_copy[idx] = info;
203     } else {
204       other_players_copy.push(info);
205     }
206     this.setState({
207       other_players: other_players_copy
208     });
209   }
210
211   render() {
212     const state = this.state;
213
214     return [
215       <GameInfo
216         key="game-info"
217         id={state.game_info.id}
218         url={state.game_info.url}
219       />,
220       <PlayerInfo
221         key="player-info"
222         game={this}
223         player={state.player_info}
224         other_players={state.other_players}
225       />,
226       <p key="spacer"></p>,
227       <CategoryRequest
228         key="category-request"
229       />
230     ];
231   }
232 }
233
234 ReactDOM.render(<Game
235                   ref={(me) => window.game = me}
236                 />, document.getElementById("empathy"));