graph.js

var GraphNodeType = { OPEN: 0, WALL: 1 };
function Graph(grid) {
  this.elements = grid;
  this.nodes = [];

  for (var x = 0, len = grid.length; x < len; ++x) {
    var row = grid[x];
    this.nodes[x] = [];
    for (var y = 0, l = row.length; y < l; ++y) {
      this.nodes[x].push(new GraphNode(x, y, row[y]));
    }
  }
}
Graph.prototype.toString = function() {
  var graphString = "\n";
  var nodes = this.nodes;
  for (var x = 0, len = nodes.length; x < len; ++x) {
    var rowDebug = "";
    var row = nodes[x];
    for (var y = 0, l = row.length; y < l; ++y) {
      rowDebug += row[y].type + " ";
    }
    graphString = graphString + rowDebug + "\n";
  }
  return graphString;
};

function GraphNode(x, y, type) {
  this.data = {};
  this.x = x;
  this.y = y;
  this.pos = { x: x, y: y };
  this.type = type;
}
GraphNode.prototype.toString = function() {
  return "[" + this.x + " " + this.y + "]";
};
GraphNode.prototype.isWall = function() {
  return this.type == GraphNodeType.WALL;
};