- if (!g.vid.toString().match(/^[0-9]+$/))
- return "Wrong variant ID";
- if (!g.vname.match(/^[a-zA-Z0-9]+$/))
- return "Wrong variant name";
- if (!g.timeControl.match(/^[0-9dhms +]+$/))
- return "Wrong characters in time control";
- if (!g.fen.match(/^[a-zA-Z0-9, /-]*$/))
- return "Bad FEN string";
- if (g.players.length != 2)
- return "Need exactly 2 players";
- if (g.players.some(p => !p.id.toString().match(/^[0-9]+$/)))
- return "Wrong characters in player ID";
- return "";
+ return (
+ g.vid.toString().match(/^[0-9]+$/) &&
+ g.cadence.match(/^[0-9dhms +]+$/) &&
+ g.fen.match(/^[a-zA-Z0-9, /-]*$/) &&
+ g.players.length == 2 &&
+ g.players.every(p => p.id.toString().match(/^[0-9]+$/))
+ );