Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import { getQueenMoveRule } from "./queenMoveRule.js"
import { DirectionEnum } from "./directionEnum.js"
function getPawnMoveRule(isFirstMovementP, isFromNorthSideP) {
let moveRule = createPieceMoveRule();
let isFirstMovement = isFirstMovementP;
let isFromNorthSide = isFromNorthSideP;
function getPossibleMovements () {
let possibleMovements = [];
possibleMovements.push(...getForwardMovements());
possibleMovements.push(...getEatingMovements());
return possibleMovements;
}
function getNextMoveRule(currentAbbreviation) {
isFirstMovement = false;
if (shouldTurnToQueen())
return { moveRule: getQueenMoveRule(), abbreviation: 'Q' }
else
return { moveRule: this, abbreviation: currentAbbreviation }
}
function shouldTurnToQueen () {
let coordinate = moveRule.getCurrentCoordinate();
if (isFromNorthSide && coordinate.getRow() <= 1)
return true;
if (!isFromNorthSide && isFromNorthSide === false && coordinate.getRow() >= 8)
return true;
return false;
}
function getAttackMovements (position, pieces) {
moveRule.updateCurrentPosition(position, pieces);
return getEatingMovements().map(mv => mv.getPosition());
}
function getForwardMovements() {
let movements = [];
let nextSquare = getForwardSquare(moveRule.getCurrentCoordinate());
if (moveRule.isEmptyCoordinate(nextSquare)) {
movements.push(nextSquare);
if (isFirstMovement && moveRule.isEmptyCoordinate(getForwardSquare(nextSquare)))
movements.push(getForwardSquare(nextSquare));
}
return movements;
}
function getEatingMovements() {
let movements = [];
let rightDiagonal = getDiagonalRightSquare(moveRule.getCurrentCoordinate());
let leftDiagonal = getDiagonalLeftSquare(moveRule.getCurrentCoordinate());
if (moveRule.isOpposingColor(rightDiagonal))
movements.push(rightDiagonal);
if (moveRule.isOpposingColor(leftDiagonal))
movements.push(leftDiagonal);
return movements;
}
function getForwardSquare(originCoordinate) {
if (isFromNorthSide)
return originCoordinate.getNextCoordinate(DirectionEnum.SOUTH);
else
return originCoordinate.getNextCoordinate(DirectionEnum.NORTH);
}
function getDiagonalRightSquare(origin) {
if (isFromNorthSide)
return origin.getNextCoordinate(DirectionEnum.SOUTHEAST);
else
return origin.getNextCoordinate(DirectionEnum.NORTHEAST);
}
function getDiagonalLeftSquare(origin) {
if (isFromNorthSide)
return origin.getNextCoordinate(DirectionEnum.SOUTHWEST);
else
return origin.getNextCoordinate(DirectionEnum.NORTHWEST);
}
return {
...moveRule,
...{
getPossibleMovements,
getAttackMovements,
getNextMoveRule
}
};
}
export {
getPawnMoveRule
}
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