public/javascripts/components/rules.js

   1 // Load rules on variant page
   2 Vue.component('my-rules', {
   3     data: function() {
   4         return { content: "" };
   5     },
   6     template: `<div v-html="content" class="section-content"></div>`,
   7     mounted: function() {
   8         // AJAX request to get rules content (plain text, HTML)
   9         let xhr = new XMLHttpRequest();
  10         let self = this;
  11         xhr.onreadystatechange = function() {
  12             if (this.readyState == 4 && this.status == 200)
  13             {
  14                 let replaceByDiag = (match, p1, p2) => { return self.drawDiag(p2); };
  15                 self.content = xhr.responseText.replace(/(fen:)([^:]*):/g, replaceByDiag);
  16             }
  17         };
  18         xhr.open("GET", "/rules/" + variant, true);
  19         xhr.setRequestHeader('X-Requested-With', "XMLHttpRequest");
  20         xhr.send();
  21     },
  22     methods: {
  23         drawDiag: function(fen) {
  24             let [sizeX,sizeY] = [V.size.x,V.size.y];
  25             let fenParts = fen.split(" ");
  26             // Obtain array of pieces images names
  27             let board = VariantRules.GetBoard(fenParts[0]);
  28             let orientation = "w";
  29             if (fenParts.length >= 2)
  30                 orientation = fenParts[1];
  31             let markArray = [];
  32             if (fenParts.length >= 3)
  33             {
  34                 let marks_str = fenParts[2];
  35                 // Turn (human) marks into coordinates
  36                 markArray = doubleArray(sizeX, sizeY, false);
  37                 let marks = marks_str.split(",");
  38                 for (let i=0; i<marks.length; i++)
  39                 {
  40                     var res = /^([a-z]+)([0-9]+)$/i.exec(marks[i]);
  41                     let x = sizeX - parseInt(res[2]); //white at bottom, so counting is reversed
  42                     let y = res[1].charCodeAt(0)-97; //always one char: max 26, big enough
  43                     markArray[x][y] = true;
  44                 }
  45             }
  46             let boardDiv = "";
  47             let [startX,startY,inc] = orientation == 'w'
  48                 ? [0, 0, 1]
  49                 : [sizeX-1, sizeY-1, -1];
  50             for (let i=startX; i>=0 && i<sizeX; i+=inc)
  51             {
  52                 boardDiv += "<div class='row'>";
  53                 for (let j=startY; j>=0 && j<sizeY; j+=inc)
  54                 {
  55                     boardDiv += "<div class='board board" + sizeY + " " +
  56                         ((i+j)%2==0 ? "light-square-diag" : "dark-square-diag") + "'>";
  57                     if (board[i][j] != VariantRules.EMPTY)
  58                     {
  59                         boardDiv += "<img src='/images/pieces/" +
  60                             VariantRules.getPpath(board[i][j]) + ".svg' class='piece'/>";
  61                     }
  62                     if (markArray.length>0 && markArray[i][j])
  63                         boardDiv += "<img src='/images/mark.svg' class='mark-square'/>";
  64                     boardDiv += "</div>";
  65                 }
  66                 boardDiv += "</div>";
  67             }
  68             return boardDiv;
  69         },
  70     },
  71 })