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chess.js
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let main = {
variables: {
turn: "w",
selectedpiece: "",
highlighted: [],
pieces: {
w_king: {
position: "5_1",
img: "♔",
captured: false,
moved: false,
type: "w_king"
},
w_queen: {
position: "4_1",
img: "♕",
captured: false,
moved: false,
type: "w_queen"
},
w_bishop1: {
position: "3_1",
img: "♗",
captured: false,
moved: false,
type: "w_bishop"
},
w_bishop2: {
position: "6_1",
img: "♗",
captured: false,
moved: false,
type: "w_bishop"
},
w_knight1: {
position: "2_1",
img: "♘",
captured: false,
moved: false,
type: "w_knight"
},
w_knight2: {
position: "7_1",
img: "♘",
captured: false,
moved: false,
type: "w_knight"
},
w_rook1: {
position: "1_1",
img: "♖",
captured: false,
moved: false,
type: "w_rook"
},
w_rook2: {
position: "8_1",
img: "♖",
captured: false,
moved: false,
type: "w_rook"
},
w_pawn1: {
position: "1_2",
img: "♙",
captured: false,
type: "w_pawn",
moved: false
},
w_pawn2: {
position: "2_2",
img: "♙",
captured: false,
type: "w_pawn",
moved: false
},
w_pawn3: {
position: "3_2",
img: "♙",
captured: false,
type: "w_pawn",
moved: false
},
w_pawn4: {
position: "4_2",
img: "♙",
captured: false,
type: "w_pawn",
moved: false
},
w_pawn5: {
position: "5_2",
img: "♙",
captured: false,
type: "w_pawn",
moved: false
},
w_pawn6: {
position: "6_2",
img: "♙",
captured: false,
type: "w_pawn",
moved: false
},
w_pawn7: {
position: "7_2",
img: "♙",
captured: false,
type: "w_pawn",
moved: false
},
w_pawn8: {
position: "8_2",
img: "♙",
captured: false,
type: "w_pawn",
moved: false
},
//continue from here for github
b_king: {
position: "5_8",
img: "♚",
captured: false,
moved: false,
type: "b_king"
},
b_queen: {
position: "4_8",
img: "♛",
captured: false,
moved: false,
type: "b_queen"
},
b_bishop1: {
position: "3_8",
img: "♝",
captured: false,
moved: false,
type: "b_bishop"
},
b_bishop2: {
position: "6_8",
img: "♝",
captured: false,
moved: false,
type: "b_bishop"
},
b_knight1: {
position: "2_8",
img: "♞",
captured: false,
moved: false,
type: "b_knight"
},
b_knight2: {
position: "7_8",
img: "♞",
captured: false,
moved: false,
type: "b_knight"
},
b_rook1: {
position: "1_8",
img: "♜",
captured: false,
moved: false,
type: "b_rook"
},
b_rook2: {
position: "8_8",
img: "♜",
captured: false,
moved: false,
type: "b_rook"
},
b_pawn1: {
position: "1_7",
img: "♟",
captured: false,
type: "b_pawn",
moved: false
},
b_pawn2: {
position: "2_7",
img: "♟",
captured: false,
type: "b_pawn",
moved: false
},
b_pawn3: {
position: "3_7",
img: "♟",
captured: false,
type: "b_pawn",
moved: false
},
b_pawn4: {
position: "4_7",
img: "♟",
captured: false,
type: "b_pawn",
moved: false
},
b_pawn5: {
position: "5_7",
img: "♟",
captured: false,
type: "b_pawn",
moved: false
},
b_pawn6: {
position: "6_7",
img: "♟",
captured: false,
type: "b_pawn",
moved: false
},
b_pawn7: {
position: "7_7",
img: "♟",
captured: false,
type: "b_pawn",
moved: false
},
b_pawn8: {
position: "8_7",
img: "♟",
captured: false,
type: "b_pawn",
moved: false
}
}
},
methods: {
gamesetup: function() {
$(".gamecell").attr("chess", "null");
for (let gamepiece in main.variables.pieces) {
$("#" + main.variables.pieces[gamepiece].position).html(
main.variables.pieces[gamepiece].img
);
$("#" + main.variables.pieces[gamepiece].position).attr(
"chess",
gamepiece
);
}
},
moveoptions: function(selectedpiece) {
let position = { x: "", y: "" };
position.x = main.variables.pieces[selectedpiece].position.split("_")[0];
position.y = main.variables.pieces[selectedpiece].position.split("_")[1];
// these options need to be var instead of let
var options = [];
var coordinates = [];
var startpoint = main.variables.pieces[selectedpiece].position;
var c1, c2, c3, c4, c5, c6, c7, c8;
if (main.variables.highlighted.length != 0) {
main.methods.togglehighlight(main.variables.highlighted);
}
switch (main.variables.pieces[selectedpiece].type) {
case "w_king":
if (
$("#6_1").attr("chess") == "null" &&
$("#7_1").attr("chess") == "null" &&
main.variables.pieces["w_king"].moved == false &&
main.variables.pieces["w_rook2"].moved == false
) {
coordinates = [
{ x: 1, y: 1 },
{ x: 1, y: 0 },
{ x: 1, y: -1 },
{ x: 0, y: -1 },
{ x: -1, y: -1 },
{ x: -1, y: 0 },
{ x: -1, y: 1 },
{ x: 0, y: 1 },
{ x: 2, y: 0 }
].map(function(val) {
return (
parseInt(position.x) +
parseInt(val.x) +
"_" +
(parseInt(position.y) + parseInt(val.y))
);
});
} else {
coordinates = [
{ x: 1, y: 1 },
{ x: 1, y: 0 },
{ x: 1, y: -1 },
{ x: 0, y: -1 },
{ x: -1, y: -1 },
{ x: -1, y: 0 },
{ x: -1, y: 1 },
{ x: 0, y: 1 }
].map(function(val) {
return (
parseInt(position.x) +
parseInt(val.x) +
"_" +
(parseInt(position.y) + parseInt(val.y))
);
});
}
options = main.methods
.options(
startpoint,
coordinates,
main.variables.pieces[selectedpiece].type
)
.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "b_king":
if (
$("#6_8").attr("chess") == "null" &&
$("#7_8").attr("chess") == "null" &&
main.variables.pieces["b_king"].moved == false &&
main.variables.pieces["b_rook2"].moved == false
) {
coordinates = [
{ x: 1, y: 1 },
{ x: 1, y: 0 },
{ x: 1, y: -1 },
{ x: 0, y: -1 },
{ x: -1, y: -1 },
{ x: -1, y: 0 },
{ x: -1, y: 1 },
{ x: 0, y: 1 },
{ x: 2, y: 0 }
].map(function(val) {
return (
parseInt(position.x) +
parseInt(val.x) +
"_" +
(parseInt(position.y) + parseInt(val.y))
);
});
} else {
coordinates = [
{ x: 1, y: 1 },
{ x: 1, y: 0 },
{ x: 1, y: -1 },
{ x: 0, y: -1 },
{ x: -1, y: -1 },
{ x: -1, y: 0 },
{ x: -1, y: 1 },
{ x: 0, y: 1 }
].map(function(val) {
return (
parseInt(position.x) +
parseInt(val.x) +
"_" +
(parseInt(position.y) + parseInt(val.y))
);
});
}
/*
coordinates = [{ x: 1, y: 1 },{ x: 1, y: 0 },{ x: 1, y: -1 },{ x: 0, y: -1 },{ x: -1, y: -1 },{ x: -1, y: 0 },{ x: -1, y: 1 },{ x: 0, y: 1 }].map(function(val){
return (parseInt(position.x) + parseInt(val.x)) + '_' + (parseInt(position.y) + parseInt(val.y));
});
*/
options = main.methods
.options(
startpoint,
coordinates,
main.variables.pieces[selectedpiece].type
)
.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "w_queen":
c1 = main.methods.w_options(position, [
{ x: 1, y: 1 },
{ x: 2, y: 2 },
{ x: 3, y: 3 },
{ x: 4, y: 4 },
{ x: 5, y: 5 },
{ x: 6, y: 6 },
{ x: 7, y: 7 }
]);
c2 = main.methods.w_options(position, [
{ x: 1, y: -1 },
{ x: 2, y: -2 },
{ x: 3, y: -3 },
{ x: 4, y: -4 },
{ x: 5, y: -5 },
{ x: 6, y: -6 },
{ x: 7, y: -7 }
]);
c3 = main.methods.w_options(position, [
{ x: -1, y: 1 },
{ x: -2, y: 2 },
{ x: -3, y: 3 },
{ x: -4, y: 4 },
{ x: -5, y: 5 },
{ x: -6, y: 6 },
{ x: -7, y: 7 }
]);
c4 = main.methods.w_options(position, [
{ x: -1, y: -1 },
{ x: -2, y: -2 },
{ x: -3, y: -3 },
{ x: -4, y: -4 },
{ x: -5, y: -5 },
{ x: -6, y: -6 },
{ x: -7, y: -7 }
]);
c5 = main.methods.w_options(position, [
{ x: 1, y: 0 },
{ x: 2, y: 0 },
{ x: 3, y: 0 },
{ x: 4, y: 0 },
{ x: 5, y: 0 },
{ x: 6, y: 0 },
{ x: 7, y: 0 }
]);
c6 = main.methods.w_options(position, [
{ x: 0, y: 1 },
{ x: 0, y: 2 },
{ x: 0, y: 3 },
{ x: 0, y: 4 },
{ x: 0, y: 5 },
{ x: 0, y: 6 },
{ x: 0, y: 7 }
]);
c7 = main.methods.w_options(position, [
{ x: -1, y: 0 },
{ x: -2, y: 0 },
{ x: -3, y: 0 },
{ x: -4, y: 0 },
{ x: -5, y: 0 },
{ x: -6, y: 0 },
{ x: -7, y: 0 }
]);
c8 = main.methods.w_options(position, [
{ x: 0, y: -1 },
{ x: 0, y: -2 },
{ x: 0, y: -3 },
{ x: 0, y: -4 },
{ x: 0, y: -5 },
{ x: 0, y: -6 },
{ x: 0, y: -7 }
]);
coordinates = c1
.concat(c2)
.concat(c3)
.concat(c4)
.concat(c5)
.concat(c6)
.concat(c7)
.concat(c8);
options = coordinates.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "b_queen":
c1 = main.methods.b_options(position, [
{ x: 1, y: 1 },
{ x: 2, y: 2 },
{ x: 3, y: 3 },
{ x: 4, y: 4 },
{ x: 5, y: 5 },
{ x: 6, y: 6 },
{ x: 7, y: 7 }
]);
c2 = main.methods.b_options(position, [
{ x: 1, y: -1 },
{ x: 2, y: -2 },
{ x: 3, y: -3 },
{ x: 4, y: -4 },
{ x: 5, y: -5 },
{ x: 6, y: -6 },
{ x: 7, y: -7 }
]);
c3 = main.methods.b_options(position, [
{ x: -1, y: 1 },
{ x: -2, y: 2 },
{ x: -3, y: 3 },
{ x: -4, y: 4 },
{ x: -5, y: 5 },
{ x: -6, y: 6 },
{ x: -7, y: 7 }
]);
c4 = main.methods.b_options(position, [
{ x: -1, y: -1 },
{ x: -2, y: -2 },
{ x: -3, y: -3 },
{ x: -4, y: -4 },
{ x: -5, y: -5 },
{ x: -6, y: -6 },
{ x: -7, y: -7 }
]);
c5 = main.methods.b_options(position, [
{ x: 1, y: 0 },
{ x: 2, y: 0 },
{ x: 3, y: 0 },
{ x: 4, y: 0 },
{ x: 5, y: 0 },
{ x: 6, y: 0 },
{ x: 7, y: 0 }
]);
c6 = main.methods.b_options(position, [
{ x: 0, y: 1 },
{ x: 0, y: 2 },
{ x: 0, y: 3 },
{ x: 0, y: 4 },
{ x: 0, y: 5 },
{ x: 0, y: 6 },
{ x: 0, y: 7 }
]);
c7 = main.methods.b_options(position, [
{ x: -1, y: 0 },
{ x: -2, y: 0 },
{ x: -3, y: 0 },
{ x: -4, y: 0 },
{ x: -5, y: 0 },
{ x: -6, y: 0 },
{ x: -7, y: 0 }
]);
c8 = main.methods.b_options(position, [
{ x: 0, y: -1 },
{ x: 0, y: -2 },
{ x: 0, y: -3 },
{ x: 0, y: -4 },
{ x: 0, y: -5 },
{ x: 0, y: -6 },
{ x: 0, y: -7 }
]);
coordinates = c1
.concat(c2)
.concat(c3)
.concat(c4)
.concat(c5)
.concat(c6)
.concat(c7)
.concat(c8);
options = coordinates.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "w_bishop":
c1 = main.methods.w_options(position, [
{ x: 1, y: 1 },
{ x: 2, y: 2 },
{ x: 3, y: 3 },
{ x: 4, y: 4 },
{ x: 5, y: 5 },
{ x: 6, y: 6 },
{ x: 7, y: 7 }
]);
c2 = main.methods.w_options(position, [
{ x: 1, y: -1 },
{ x: 2, y: -2 },
{ x: 3, y: -3 },
{ x: 4, y: -4 },
{ x: 5, y: -5 },
{ x: 6, y: -6 },
{ x: 7, y: -7 }
]);
c3 = main.methods.w_options(position, [
{ x: -1, y: 1 },
{ x: -2, y: 2 },
{ x: -3, y: 3 },
{ x: -4, y: 4 },
{ x: -5, y: 5 },
{ x: -6, y: 6 },
{ x: -7, y: 7 }
]);
c4 = main.methods.w_options(position, [
{ x: -1, y: -1 },
{ x: -2, y: -2 },
{ x: -3, y: -3 },
{ x: -4, y: -4 },
{ x: -5, y: -5 },
{ x: -6, y: -6 },
{ x: -7, y: -7 }
]);
coordinates = c1.concat(c2).concat(c3).concat(c4);
options = coordinates.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "b_bishop":
c1 = main.methods.b_options(position, [
{ x: 1, y: 1 },
{ x: 2, y: 2 },
{ x: 3, y: 3 },
{ x: 4, y: 4 },
{ x: 5, y: 5 },
{ x: 6, y: 6 },
{ x: 7, y: 7 }
]);
c2 = main.methods.b_options(position, [
{ x: 1, y: -1 },
{ x: 2, y: -2 },
{ x: 3, y: -3 },
{ x: 4, y: -4 },
{ x: 5, y: -5 },
{ x: 6, y: -6 },
{ x: 7, y: -7 }
]);
c3 = main.methods.b_options(position, [
{ x: -1, y: 1 },
{ x: -2, y: 2 },
{ x: -3, y: 3 },
{ x: -4, y: 4 },
{ x: -5, y: 5 },
{ x: -6, y: 6 },
{ x: -7, y: 7 }
]);
c4 = main.methods.b_options(position, [
{ x: -1, y: -1 },
{ x: -2, y: -2 },
{ x: -3, y: -3 },
{ x: -4, y: -4 },
{ x: -5, y: -5 },
{ x: -6, y: -6 },
{ x: -7, y: -7 }
]);
coordinates = c1.concat(c2).concat(c3).concat(c4);
options = coordinates.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "w_knight":
coordinates = [
{ x: -1, y: 2 },
{ x: 1, y: 2 },
{ x: 1, y: -2 },
{ x: -1, y: -2 },
{ x: 2, y: 1 },
{ x: 2, y: -1 },
{ x: -2, y: -1 },
{ x: -2, y: 1 }
].map(function(val) {
return (
parseInt(position.x) +
parseInt(val.x) +
"_" +
(parseInt(position.y) + parseInt(val.y))
);
});
options = main.methods
.options(
startpoint,
coordinates,
main.variables.pieces[selectedpiece].type
)
.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "b_knight":
coordinates = [
{ x: -1, y: 2 },
{ x: 1, y: 2 },
{ x: 1, y: -2 },
{ x: -1, y: -2 },
{ x: 2, y: 1 },
{ x: 2, y: -1 },
{ x: -2, y: -1 },
{ x: -2, y: 1 }
].map(function(val) {
return (
parseInt(position.x) +
parseInt(val.x) +
"_" +
(parseInt(position.y) + parseInt(val.y))
);
});
options = main.methods
.options(
startpoint,
coordinates,
main.variables.pieces[selectedpiece].type
)
.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "w_rook":
c1 = main.methods.w_options(position, [
{ x: 1, y: 0 },
{ x: 2, y: 0 },
{ x: 3, y: 0 },
{ x: 4, y: 0 },
{ x: 5, y: 0 },
{ x: 6, y: 0 },
{ x: 7, y: 0 }
]);
c2 = main.methods.w_options(position, [
{ x: 0, y: 1 },
{ x: 0, y: 2 },
{ x: 0, y: 3 },
{ x: 0, y: 4 },
{ x: 0, y: 5 },
{ x: 0, y: 6 },
{ x: 0, y: 7 }
]);
c3 = main.methods.w_options(position, [
{ x: -1, y: 0 },
{ x: -2, y: 0 },
{ x: -3, y: 0 },
{ x: -4, y: 0 },
{ x: -5, y: 0 },
{ x: -6, y: 0 },
{ x: -7, y: 0 }
]);
c4 = main.methods.w_options(position, [
{ x: 0, y: -1 },
{ x: 0, y: -2 },
{ x: 0, y: -3 },
{ x: 0, y: -4 },
{ x: 0, y: -5 },
{ x: 0, y: -6 },
{ x: 0, y: -7 }
]);
coordinates = c1.concat(c2).concat(c3).concat(c4);
options = coordinates.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "b_rook":
c1 = main.methods.b_options(position, [
{ x: 1, y: 0 },
{ x: 2, y: 0 },
{ x: 3, y: 0 },
{ x: 4, y: 0 },
{ x: 5, y: 0 },
{ x: 6, y: 0 },
{ x: 7, y: 0 }
]);
c2 = main.methods.b_options(position, [
{ x: 0, y: 1 },
{ x: 0, y: 2 },
{ x: 0, y: 3 },
{ x: 0, y: 4 },
{ x: 0, y: 5 },
{ x: 0, y: 6 },
{ x: 0, y: 7 }
]);
c3 = main.methods.b_options(position, [
{ x: -1, y: 0 },
{ x: -2, y: 0 },
{ x: -3, y: 0 },
{ x: -4, y: 0 },
{ x: -5, y: 0 },
{ x: -6, y: 0 },
{ x: -7, y: 0 }
]);
c4 = main.methods.b_options(position, [
{ x: 0, y: -1 },
{ x: 0, y: -2 },
{ x: 0, y: -3 },
{ x: 0, y: -4 },
{ x: 0, y: -5 },
{ x: 0, y: -6 },
{ x: 0, y: -7 }
]);
coordinates = c1.concat(c2).concat(c3).concat(c4);
options = coordinates.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "w_pawn":
if (main.variables.pieces[selectedpiece].moved == false) {
coordinates = [
{ x: 0, y: 1 },
{ x: 0, y: 2 },
{ x: 1, y: 1 },
{ x: -1, y: 1 }
].map(function(val) {
return (
parseInt(position.x) +
parseInt(val.x) +
"_" +
(parseInt(position.y) + parseInt(val.y))
);
});
} else if (main.variables.pieces[selectedpiece].moved == true) {
coordinates = [
{ x: 0, y: 1 },
{ x: 1, y: 1 },
{ x: -1, y: 1 }
].map(function(val) {
return (
parseInt(position.x) +
parseInt(val.x) +
"_" +
(parseInt(position.y) + parseInt(val.y))
);
});
}
options = main.methods
.options(
startpoint,
coordinates,
main.variables.pieces[selectedpiece].type
)
.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
case "b_pawn":
// calculate pawn options
if (main.variables.pieces[selectedpiece].moved == false) {
coordinates = [
{ x: 0, y: -1 },
{ x: 0, y: -2 },
{ x: 1, y: -1 },
{ x: -1, y: -1 }
].map(function(val) {
return (
parseInt(position.x) +
parseInt(val.x) +
"_" +
(parseInt(position.y) + parseInt(val.y))
);
});
} else if (main.variables.pieces[selectedpiece].moved == true) {
coordinates = [
{ x: 0, y: -1 },
{ x: 1, y: -1 },
{ x: -1, y: -1 }
].map(function(val) {
return (
parseInt(position.x) +
parseInt(val.x) +
"_" +
(parseInt(position.y) + parseInt(val.y))
);
});
}
options = main.methods
.options(
startpoint,
coordinates,
main.variables.pieces[selectedpiece].type
)
.slice(0);
main.variables.highlighted = options.slice(0);
main.methods.togglehighlight(options);
break;
}
},
options: function(startpoint, coordinates, piecetype) {
// first check if any of the possible coordinates is out of bounds;
coordinates = coordinates.filter((val) => {
let pos = { x: 0, y: 0 };
pos.x = parseInt(val.split("_")[0]);
pos.y = parseInt(val.split("_")[1]);
if (!(pos.x < 1) && !(pos.x > 8) && !(pos.y < 1) && !(pos.y > 8)) {
// if it is not out of bounds, return the coordinate;
return val;
}
});
switch (piecetype) {
case "w_king":
coordinates = coordinates.filter((val) => {
return (
$("#" + val).attr("chess") == "null" ||
$("#" + val)
.attr("chess")
.slice(0, 1) == "b"
);
});
break;
case "b_king":
coordinates = coordinates.filter((val) => {
return (
$("#" + val).attr("chess") == "null" ||
$("#" + val)
.attr("chess")
.slice(0, 1) == "w"
);
});
break;
case "w_knight":
coordinates = coordinates.filter((val) => {
return (
$("#" + val).attr("chess") == "null" ||
$("#" + val)
.attr("chess")
.slice(0, 1) == "b"
);
});
break;
case "b_knight":
coordinates = coordinates.filter((val) => {
return (
$("#" + val).attr("chess") == "null" ||
$("#" + val)
.attr("chess")
.slice(0, 1) == "w"
);
});
break;
case "w_pawn":
coordinates = coordinates.filter((val) => {
let sp = { x: 0, y: 0 };
let coordinate = val.split("_");
sp.x = startpoint.split("_")[0];
sp.y = startpoint.split("_")[1];
if (coordinate[0] < sp.x || coordinate[0] > sp.x) {
// if the coordinate is on either side of the center, check if it has an opponent piece on it;
return (
$("#" + val).attr("chess") != "null" &&
$("#" + val)
.attr("chess")
.slice(0, 1) == "b"
); // return coordinates with opponent pieces on them
} else {
// else if the coordinate is in the center;
if (
coordinate[1] == parseInt(sp.y) + 2 &&
$("#" + sp.x + "_" + (parseInt(sp.y) + 1)).attr("chess") !=
"null"
) {
// do nothing if this is the pawns first move, and there is a piece in front of the 2nd coordinate;
} else {
return $("#" + val).attr("chess") == "null"; // otherwise return the coordinate if there is no chess piece on it;
}
}
});
break;
case "b_pawn":
coordinates = coordinates.filter((val) => {
let sp = { x: 0, y: 0 };
let coordinate = val.split("_");
sp.x = startpoint.split("_")[0];
sp.y = startpoint.split("_")[1];
if (coordinate[0] < sp.x || coordinate[0] > sp.x) {
// if the coordinate is on either side of the center, check if it has an opponent piece on it;
return (
$("#" + val).attr("chess") != "null" &&
$("#" + val)
.attr("chess")
.slice(0, 1) == "w"
); // return coordinates with opponent pieces on them
} else {
// else if the coordinate is in the center;
if (
coordinate[1] == parseInt(sp.y) - 2 &&
$("#" + sp.x + "_" + (parseInt(sp.y) - 1)).attr("chess") !=
"null"
) {