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"use strict"; |
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var Position = require('./position'); |
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// Expose `Grid` |
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module.exports = Grid; |
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/** |
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* Set up Grid with `topRightPos` |
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* |
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* Parameters: |
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* |
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* - `topRightPos` coordinates of the cell at the top right of the grid. ({x:1,y:1}) |
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* |
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* @param {Object} topRightPos |
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* @api public |
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*/ |
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function Grid(topRightPos) { |
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this.width = topRightPos.x; |
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this.height = topRightPos.y; |
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this.occupation = {}; |
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this.isValid(); |
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} |
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/** |
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* Types validator |
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* |
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* @api public |
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*/ |
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Grid.prototype.isValid = function() { |
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if(!isCoordinates(this.width,this.height)) { |
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throw new Error('Coordinates are not valid'); |
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} |
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}; |
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/** |
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* Save item's position inside the grid |
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* |
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* @param {Number} id |
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* @param {Object} position |
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* @api public |
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*/ |
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Grid.prototype.setItemPosition = function(id, position) { |
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this.occupation[id] = position; |
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}; |
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/** |
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* Get cell occupation as a boolean |
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* |
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* @param {Object} position |
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* @api public |
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*/ |
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Grid.prototype.getCellOccupation = function(position) { |
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if(isPosition(position)){ |
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for(var id in this.occupation){ |
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if(this.occupation[id].x === position.x && this.occupation[id].y === position.y){ |
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return parseInt(id); |
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} |
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} |
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return null; |
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} |
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else { |
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throw new Error('Position is not valid'); |
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} |
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}; |
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/** |
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* Coordinates validator helper |
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* |
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* @param {Number} x |
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* @param {Number} y |
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* @api protected |
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*/ |
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85
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function isCoordinates(x,y) { |
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return (x === parseInt(x, 10) && x > -1) && (y === parseInt(y, 10) && y > -1); |
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} |
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90
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/** |
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* Position validator helper |
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* |
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* @param {Object} position |
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* @api protected |
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*/ |
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97
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function isPosition(position) { |
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return position instanceof Position; |
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} |
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Huljo /
MowItNow
