VersaWhiteboard/s_whiteboard.js

//This file is only for saving the whiteboard. (Not to a file, only to RAM atm. Whiteboard is gone after server restart)

var savedBoards = {};
module.exports = {
	handleEventsAndData : function(content) {
		var tool = content["t"]; //Tool witch is used
		var wid = content["wid"]; //whiteboard ID
		var username = content["username"];
		if(tool==="clear") { //Clear the whiteboard
			delete savedBoards[wid];
		} else if(tool==="undo") { //Undo an action
			if(savedBoards[wid]) {
				for(var i=savedBoards[wid].length-1;i>=0;i--){
					if(savedBoards[wid][i]["username"]==username) {
						var drawId = savedBoards[wid][i]["drawId"];
						for(var i=savedBoards[wid].length-1;i>=0;i--){
							if(savedBoards[wid][i]["drawId"]==drawId && savedBoards[wid][i]["username"]==username) {
								savedBoards[wid].splice(i, 1);
							}
						}
						break;
					}
				}
			}
		} else if(["line", "pen", "rect", "circle", "eraser", "addImgBG", "recSelect", "eraseRec", "addTextBox", "setTextboxText", "removeTextbox"].includes(tool)) { //Save all this actions
			if(!savedBoards[wid]) {
				savedBoards[wid] = [];
			}
			delete content["wid"]; //Delete id from content so we don't store it twice
			if(tool==="setTextboxText") {
				for(var i=savedBoards[wid].length-1;i>=0;i--){ //Remove old textbox tex -> dont store it twice
					if(savedBoards[wid][i]["t"]==="setTextboxText" && savedBoards[wid][i]["d"][0]===content["d"][0]) {
						savedBoards[wid].splice(i,1);
					}
				}
			}
			savedBoards[wid].push(content);
		}
	},
	loadStoredData : function(wid) { //Load saved whiteboard
		return savedBoards[wid] ? savedBoards[wid] : [];
	}
}