client/src/utils/printDiagram.js

   1 import { ArrayFun } from "@/utils/array";
   2
   3 // Turn (human) marks into coordinates
   4 function getMarkArray(marks) {
   5   if (!marks || marks == "-") return [];
   6   let markArray = ArrayFun.init(V.size.x, V.size.y, false);
   7   const squares = marks.split(",");
   8   for (let i = 0; i < squares.length; i++) {
   9     const coords = V.SquareToCoords(squares[i]);
  10     markArray[coords.x][coords.y] = true;
  11   }
  12   return markArray;
  13 }
  14
  15 // Turn (human) shadow indications into coordinates
  16 function getShadowArray(shadow) {
  17   if (!shadow || shadow == "-") return [];
  18   let shadowArray = ArrayFun.init(V.size.x, V.size.y, false);
  19   const squares = shadow.split(",");
  20   for (let i = 0; i < squares.length; i++) {
  21     const rownum = V.size.x - parseInt(squares[i]);
  22     if (!isNaN(rownum)) {
  23       // Shadow a full row
  24       for (let i = 0; i < V.size.y; i++) shadowArray[rownum][i] = true;
  25       continue;
  26     }
  27     if (squares[i].length == 1) {
  28       // Shadow a full column
  29       const colnum = V.ColumnToCoord(squares[i]);
  30       for (let i = 0; i < V.size.x; i++) shadowArray[i][colnum] = true;
  31       continue;
  32     }
  33     if (squares[i].indexOf("-") >= 0) {
  34       // Shadow a range of squares, horizontally or vertically
  35       const firstLastSq = squares[i].split("-");
  36       const range = [
  37         V.SquareToCoords(firstLastSq[0]),
  38         V.SquareToCoords(firstLastSq[1])
  39       ];
  40       const step = [
  41         range[1].x == range[0].x
  42           ? 0
  43           : (range[1].x - range[0].x) / Math.abs(range[1].x - range[0].x),
  44         range[1].y == range[0].y
  45           ? 0
  46           : (range[1].y - range[0].y) / Math.abs(range[1].y - range[0].y)
  47       ];
  48       // Convention: range always from smaller to larger number
  49       for (
  50         let x = range[0].x, y = range[0].y;
  51         x <= range[1].x && y <= range[1].y;
  52         x += step[0], y += step[1]
  53       ) {
  54         shadowArray[x][y] = true;
  55       }
  56       continue;
  57     }
  58     // Shadow just one square:
  59     const coords = V.SquareToCoords(squares[i]);
  60     shadowArray[coords.x][coords.y] = true;
  61   }
  62   return shadowArray;
  63 }
  64
  65 // args: object with position (mandatory), and
  66 // orientation, marks, shadow (optional)
  67 export function getDiagram(args) {
  68   // Obtain the array of pieces images names:
  69   const board = V.GetBoard(args.position);
  70   const orientation = args.orientation || "w";
  71   const markArray = getMarkArray(args.marks);
  72   const shadowArray = getShadowArray(args.shadow);
  73   let boardDiv = "";
  74   const [startX, startY, inc] =
  75     orientation == "w" ? [0, 0, 1] : [V.size.x - 1, V.size.y - 1, -1];
  76   for (let i = startX; i >= 0 && i < V.size.x; i += inc) {
  77     boardDiv += "<div class='row'>";
  78     for (let j = startY; j >= 0 && j < V.size.y; j += inc) {
  79       boardDiv +=
  80         "<div class='board board" +
  81         V.size.y +
  82         " " +
  83         ((i + j) % 2 == 0 ? "light-square-diag" : "dark-square-diag") +
  84         (shadowArray.length > 0 && shadowArray[i][j] ? " in-shadow" : "") +
  85         "'>";
  86       if (board[i][j] != V.EMPTY) {
  87         boardDiv +=
  88           "<img " +
  89           "src='/images/pieces/" +
  90           V.getPpath(board[i][j]) +
  91           ".svg' " +
  92           "class='piece'/>";
  93       }
  94       if (markArray.length > 0 && markArray[i][j])
  95         boardDiv += "<img src='/images/mark.svg' class='mark-square'/>";
  96       boardDiv += "</div>";
  97     }
  98     boardDiv += "</div>";
  99   }
 100   return boardDiv;
 101 }