On the way to problems: saving state [not functional yet]
[vchess.git] / sockets.js
index 675a80e..f1354f3 100644 (file)
 const url = require('url');
-const Variants = require("./variants");
+const sqlite3 = require('sqlite3');
+const db = new sqlite3.Database('db/vchess.sqlite');
 
 module.exports = function(wss) {
-
-       let clients = { "index": {} };
-       let games = {}; //pending games (player sid)
-       for (const v of Variants)
-               clients[v.name] = {};
-
-//     // Safety counter (TODO: is it necessary ?)
-//     setInterval(() => {
-//             Object.keys(clients).forEach(k => {
-//                     Object.keys(clients[k]).forEach(ck => {
-//                             if (!clients[k][ck] || clients[k][ck].readyState != 1)
-//                                     delete clients[k][ck];
-//                     });
-//             });
-//     }, 60000); //every minute (will be lowered if a lot of users...)
-
-       // No-op function as a callback when sending messages
-       const noop = () => { };
-
-       wss.on("connection", (socket, req) => {
-               const params = new URL("http://localhost" + req.url).searchParams;
-               const sid = params.get("sid");
-               const page = params.get("page");
-               // Ignore duplicate connections:
-               if (!!clients[page][sid])
-               {
-                       socket.send(JSON.stringify({code:"duplicate"}));
-                       return;
-               }
-               clients[page][sid] = socket;
-               if (page == "index")
-               {
-                       // Send counting info
-                       const countings = {};
-                       for (const v of Variants)
-                               countings[v.name] = Object.keys(clients[v.name]).length;
-                       socket.send(JSON.stringify({code:"counts",counts:countings}));
-               }
-               else
-               {
-                       // Send to every client connected on index an update message for counts
-                       Object.keys(clients["index"]).forEach( k => {
-                               clients["index"][k].send(JSON.stringify({code:"increase",vname:page}), noop);
-                       });
-                       // Also notify potential opponents: hit all clients which check if sid corresponds
-                       Object.keys(clients[page]).forEach( k => {
-                               clients[page][k].send(JSON.stringify({code:"connect",id:sid}), noop);
-                       });
-                       socket.on("message", objtxt => {
-                               let obj = JSON.parse(objtxt);
-                               switch (obj.code)
+       db.serialize(function() {
+               db.all("SELECT * FROM Variants", (err,variants) => {
+                       let clients = { "index": {} };
+                       let games = {}; //pending games (player sid)
+                       for (const v of variants)
+                               clients[v.name] = {};
+                       // No-op function as a callback when sending messages
+                       const noop = () => { };
+                       wss.on("connection", (socket, req) => {
+                               const params = new URL("http://localhost" + req.url).searchParams;
+                               const sid = params.get("sid");
+                               const page = params.get("page");
+                               // Ignore duplicate connections:
+                               if (!!clients[page][sid])
                                {
-                                       case "newmove":
-                                               if (!!clients[page][obj.oppid])
-                                               {
-                                                       clients[page][obj.oppid].send(
-                                                               JSON.stringify({code:"newmove",move:obj.move}), noop);
-                                               }
-                                               break;
-                                       case "ping":
-                                               if (!!clients[page][obj.oppid])
-                                                       socket.send(JSON.stringify({code:"pong"}));
-                                               break;
-                                       case "lastate":
-                                               if (!!clients[page][obj.oppid])
-                                               {
-                                                       const oppId = obj.oppid;
-                                                       obj.oppid = sid; //I'm oppid for my opponent
-                                                       clients[page][oppId].send(JSON.stringify(obj), noop);
-                                               }
-                                               break;
-                                       case "newgame":
-                                               if (!!games[page])
+                                       socket.send(JSON.stringify({code:"duplicate"}));
+                                       return;
+                               }
+                               clients[page][sid] = socket;
+                               if (page == "index")
+                               {
+                                       // Send counting info
+                                       const countings = {};
+                                       for (const v of variants)
+                                               countings[v.name] = Object.keys(clients[v.name]).length;
+                                       socket.send(JSON.stringify({code:"counts",counts:countings}));
+                               }
+                               else
+                               {
+                                       // Send to every client connected on index an update message for counts
+                                       Object.keys(clients["index"]).forEach( k => {
+                                               clients["index"][k].send(
+                                                       JSON.stringify({code:"increase",vname:page}), noop);
+                                       });
+                                       // Also notify potential opponents:
+                                       // hit all clients which check if sid corresponds
+                                       Object.keys(clients[page]).forEach( k => {
+                                               clients[page][k].send(JSON.stringify({code:"connect",id:sid}), noop);
+                                       });
+                                       socket.on("message", objtxt => {
+                                               let obj = JSON.parse(objtxt);
+                                               switch (obj.code)
                                                {
-                                                       // Start a new game
-                                                       const oppId = games[page]["id"];
-                                                       const fen = games[page]["fen"];
-                                                       delete games[page];
-                                                       const mycolor = Math.random() < 0.5 ? 'w' : 'b';
-                                                       socket.send(
-                                                               JSON.stringify({code:"newgame",fen:fen,oppid:oppId,color:mycolor}));
-                                                       if (!!clients[page][oppId])
-                                                       {
-                                                               clients[page][oppId].send(
-                                                                       JSON.stringify(
-                                                                               {code:"newgame",fen:fen,oppid:sid,color:mycolor=="w"?"b":"w"}),
-                                                                       noop);
-                                                       }
+                                                       case "newmove":
+                                                               if (!!clients[page][obj.oppid])
+                                                               {
+                                                                       clients[page][obj.oppid].send(
+                                                                               JSON.stringify({code:"newmove",move:obj.move}), noop);
+                                                               }
+                                                               break;
+                                                       case "ping":
+                                                               if (!!clients[page][obj.oppid])
+                                                                       socket.send(JSON.stringify({code:"pong"}));
+                                                               break;
+                                                       case "lastate":
+                                                               if (!!clients[page][obj.oppid])
+                                                               {
+                                                                       const oppId = obj.oppid;
+                                                                       obj.oppid = sid; //I'm oppid for my opponent
+                                                                       clients[page][oppId].send(JSON.stringify(obj), noop);
+                                                               }
+                                                               break;
+                                                       case "newgame":
+                                                               if (!!games[page])
+                                                               {
+                                                                       // Start a new game
+                                                                       const oppId = games[page]["id"];
+                                                                       const fen = games[page]["fen"];
+                                                                       delete games[page];
+                                                                       const mycolor = Math.random() < 0.5 ? 'w' : 'b';
+                                                                       socket.send(JSON.stringify(
+                                                                               {code:"newgame",fen:fen,oppid:oppId,color:mycolor}));
+                                                                       if (!!clients[page][oppId])
+                                                                       {
+                                                                               clients[page][oppId].send(
+                                                                                       JSON.stringify(
+                                                                                               {code:"newgame",fen:fen,oppid:sid,color:mycolor=="w"?"b":"w"}),
+                                                                                       noop);
+                                                                       }
+                                                               }
+                                                               else
+                                                                       games[page] = {id:sid, fen:obj.fen}; //wait for opponent
+                                                               break;
+                                                       case "cancelnewgame": //if a user cancel his seek
+                                                               delete games[page];
+                                                               break;
+                                                       case "resign":
+                                                               if (!!clients[page][obj.oppid])
+                                                                       clients[page][obj.oppid].send(JSON.stringify({code:"resign"}), noop);
+                                                               break;
                                                }
-                                               else
-                                                       games[page] = {id:sid, fen:obj.fen}; //wait for opponent
-                                               break;
-                                       case "cancelnewgame": //if a user cancel his seek
-                                               delete games[page];
-                                               break;
-                                       case "resign":
-                                               if (!!clients[page][obj.oppid])
-                                                       clients[page][obj.oppid].send(JSON.stringify({code:"resign"}), noop);
-                                               break;
+                                       });
                                }
-                       });
-               }
-               socket.on("close", () => {
-                       delete clients[page][sid];
-                       // Remove potential pending game
-                       if (!!games[page] && games[page]["id"] == sid)
-                               delete games[page];
-                       if (page != "index")
-                       {
-                               // Send to every client connected on index an update message for counts
-                               Object.keys(clients["index"]).forEach( k => {
-                                       clients["index"][k].send(JSON.stringify({code:"decrease",vname:page}), noop);
+                               socket.on("close", () => {
+                                       delete clients[page][sid];
+                                       // Remove potential pending game
+                                       if (!!games[page] && games[page]["id"] == sid)
+                                               delete games[page];
+                                       if (page != "index")
+                                       {
+                                               // Send to every client connected on index an update message for counts
+                                               Object.keys(clients["index"]).forEach( k => {
+                                                       clients["index"][k].send(
+                                                               JSON.stringify({code:"decrease",vname:page}), noop);
+                                               });
+                                       }
+                                       // Also notify potential opponents:
+                                       // hit all clients which check if sid corresponds
+                                       Object.keys(clients[page]).forEach( k => {
+                                               clients[page][k].send(JSON.stringify({code:"disconnect",id:sid}), noop);
+                                       });
                                });
-                       }
-                       // Also notify potential opponents: hit all clients which check if sid corresponds
-                       Object.keys(clients[page]).forEach( k => {
-                               clients[page][k].send(JSON.stringify({code:"disconnect",id:sid}), noop);
                        });
                });
        });