Small changes in Hall + data/challengeCheck

[vchess.git] / client / src / data / challengeCheck.js

// TODO: rename file "timeControl.js" in utils/
function timeUnitToSeconds(value, unit)
{
  let seconds = value;
  switch (unit)
  {
    case 'd':
      seconds *= 24;
    case 'h':
      seconds *= 60;
    case 'm':
      seconds *= 60;
  }
  return seconds;
}

function isLargerUnit(unit1, unit2)
{
  return (unit1 == 'd' && unit2 != 'd')
    || (unit1 == 'h' && ['s','m'].includes(unit2))
    || (unit1 == 'm' && unit2 == 's');
}

export function extractTime(timeControl)
{
  const tcParts = timeControl.replace(/ /g,"").split('+');
	const mainTimeArray = tcParts[0].match(/([0-9]+)([smhd])/);
  if (!mainTimeArray)
    return null;
  const mainTimeValue = parseInt(mainTimeArray[1]);
  const mainTimeUnit = mainTimeArray[2];
  const mainTime = timeUnitToSeconds(mainTimeValue, mainTimeUnit);
  let increment = 0;
  if (tcParts.length >= 2)
  {
    const increment = tcParts[1].match(/([0-9]+)([smhd])/);
    if (!increment)
      return null;
    const incrementValue = parseInt(increment[1]);
    const incrementUnit = increment[2];
    // Increment unit cannot be larger than main unit:
    if (isLargerUnit(incrementUnit, mainTimeUnit))
      return null;
    increment = timeUnitToSeconds(incrementValue, incrementUnit);
  }
  return {mainTime:mainTime, increment:increment};
}

// TODO: put this in Hall.vue
export function checkChallenge(c)
{
	const vid = parseInt(c.vid);
	if (isNaN(vid) || vid <= 0)
		return "Please select a variant";

  const tc = extractTime(c.timeControl);
  if (!tc)
    return "Wrong time control";

	// Basic alphanumeric check for players names
	let playerCount = 0;
	for (const pname of c.to)
	{
		if (pname.length > 0)
		{
      // TODO: slightly redundant (see data/userCheck.js)
			if (!pname.match(/^[\w]+$/))
				return "Wrong characters in players names";
			playerCount++;
		}
	}

	if (playerCount > 0 && playerCount != c.nbPlayers-1)
		return "None, or all of the opponent names must be filled"

  // Allow custom FEN (and check it) only for individual challenges
  if (c.fen.length > 0 && playerCount > 0)
  {
    if (!V.IsGoodFen(c.fen))
      return "Bad FEN string";
  }
}