room.js

function Room(roomName, outside, obstacles, entryPoint, exitPoint, cols, rows) {
    this.rows = rows;
    this.cols = cols;
    /* name of the room */
    this.roomName = roomName;
    let chestCounter = 0;
    let chests = [];

    /* if true sets background to grass else to stone */
    this.outside = outside;

    /* arraz of trees and stones */
    this.obstacles = obstacles;

    /* start and exitPoint of room  */
    this.entryPoint = entryPoint;
    this.exitPoint = exitPoint;
   /* this.checkIfChestIsOpened = function (chest) {
        return chest.opened;
    } */
    function checkIfChestIsOpened(chest) {
        // console.log(chest.opened);
        return chest.opened;
    }

    getTreeImg = function () {
        return document.getElementById("tree");
    }
    getStoneImg = function () {
        return document.getElementById("stone");
    }
    getChestImg = function (chest) {
        if (typeof chest == "undefined") {
            return document.getElementById("chest");
        } else {
            if (checkIfChestIsOpened(chest)) {
                return document.getElementById("chestOpened");
            } else {
                return document.getElementById("chest");
            }
        }
    }


    /* creates Obstacles */
    this.generateObstacles = function (squareSize, bool) {
        for (let i = 0; i < this.obstacles.length; i++) {
            for (let j = 1; j < this.obstacles[i].length; j++) {
                for (let k = 0; k < this.obstacles[i][j].length; k++) {
                    if (this.obstacles[i][0] === "tree") {
                        let treeIMG = getTreeImg();
                        ctx.drawImage(treeIMG, this.obstacles[i][j][0] * squareSize, this.obstacles[i][j][1] * squareSize, squareSize, squareSize);
                    } else if (this.obstacles[i][0] === "stone") {
                        // ctx.fillStyle = "grey";
                        let stoneIMG = getStoneImg();
                        ctx.drawImage(stoneIMG, this.obstacles[i][j][0] * squareSize, this.obstacles[i][j][1] * squareSize, squareSize, squareSize);
                    } else {
                        if (k != 1) {
                            if (!bool) {
                                let chest = new Chest(this.obstacles[i][j][0], this.obstacles[i][j][1]);
                                chests.push(chest);
                                chestCounter++;
                            }
                            let chestIMG = getChestImg(chest);
                            ctx.drawImage(chestIMG, this.obstacles[i][j][0] * squareSize, this.obstacles[i][j][1] * squareSize, squareSize, squareSize);

                        }
                    }
                }
            }
        }

    }

    // returns chests to Player
    this.getChests = function () {
        return chests;
    }

    /* creates Start and Exit */
    this.getStartEnd = function (squareSize) {
        let startIMG = document.getElementById("start");
        ctx.drawImage(startIMG, this.entryPoint[0] * squareSize, this.entryPoint[1] * squareSize, squareSize, squareSize);
        let doorIMG = document.getElementById("door");
        ctx.drawImage(doorIMG, this.exitPoint[0] * squareSize, this.exitPoint[1] * squareSize, squareSize, squareSize);
    }

    this.openDoor = function () {
        // console.log("You open the door!");
        mapCounter++;
        swapRoom = true;
        loadRoom();
    }

    /* creates every object in the room */
    this.generateRoom = function (squareSize, bool) {
        this.showBackground(squareSize);
        this.getStartEnd(squareSize);
        this.generateObstacles(squareSize, bool);
    }

    // shows background
    this.showBackground = function (squareSize) {
        if (this.outside == false) {
            background = document.getElementById("ground");
        } else {
            background = document.getElementById("grass");
        }
        for (let i = 0; i < cols; i++) {
            for (let j = 0; j < rows; j++) {
                let x = i * squareSize;
                let y = j * squareSize;
                ctx.drawImage(background, x, y, squareSize - 1, squareSize - 1);
            }
        }
    }

}