132 lines
4.7 KiB
JavaScript
132 lines
4.7 KiB
JavaScript
//This file is only for saving the whiteboard.
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const fs = require("fs");
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const config = require("./config/config");
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var savedBoards = {};
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var savedUndos = {};
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var saveDelay = false;
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if (config.backend.enableFileDatabase) {
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//read saved boards from file
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fs.readFile("savedBoards.json", (err, data) => {
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if (err) {
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return console.log(
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"No persistend Whiteboard Datafile found... this is not a problem on the first start!"
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);
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}
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savedBoards = JSON.parse(data);
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});
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}
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module.exports = {
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handleEventsAndData: function (content) {
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var tool = content["t"]; //Tool witch is used
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var wid = content["wid"]; //whiteboard ID
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var username = content["username"];
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if (tool === "clear") {
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//Clear the whiteboard
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delete savedBoards[wid];
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delete savedUndos[wid];
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} else if (tool === "undo") {
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//Undo an action
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if (!savedUndos[wid]) {
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savedUndos[wid] = [];
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}
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if (savedBoards[wid]) {
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for (var i = savedBoards[wid].length - 1; i >= 0; i--) {
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if (savedBoards[wid][i]["username"] == username) {
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var drawId = savedBoards[wid][i]["drawId"];
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for (var i = savedBoards[wid].length - 1; i >= 0; i--) {
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if (
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savedBoards[wid][i]["drawId"] == drawId &&
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savedBoards[wid][i]["username"] == username
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) {
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savedUndos[wid].push(savedBoards[wid][i]);
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savedBoards[wid].splice(i, 1);
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}
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}
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break;
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}
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}
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if (savedUndos[wid].length > 1000) {
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savedUndos[wid].splice(0, savedUndos[wid].length - 1000);
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}
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}
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} else if (tool === "redo") {
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if (!savedUndos[wid]) {
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savedUndos[wid] = [];
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}
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if (!savedBoards[wid]) {
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savedBoards[wid] = [];
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}
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for (var i = savedUndos[wid].length - 1; i >= 0; i--) {
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if (savedUndos[wid][i]["username"] == username) {
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var drawId = savedUndos[wid][i]["drawId"];
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for (var i = savedUndos[wid].length - 1; i >= 0; i--) {
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if (
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savedUndos[wid][i]["drawId"] == drawId &&
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savedUndos[wid][i]["username"] == username
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) {
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savedBoards[wid].push(savedUndos[wid][i]);
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savedUndos[wid].splice(i, 1);
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}
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}
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break;
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}
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}
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} else if (
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[
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"line",
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"pen",
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"rect",
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"circle",
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"eraser",
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"addImgBG",
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"recSelect",
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"eraseRec",
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"addTextBox",
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"setTextboxText",
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"removeTextbox",
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"setTextboxPosition",
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"setTextboxFontSize",
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"setTextboxFontColor",
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].includes(tool)
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) {
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//Save all this actions
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savedBoards[wid] = savedBoards[wid] ? savedBoards[wid] : [];
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delete content["wid"]; //Delete id from content so we don't store it twice
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if (tool === "setTextboxText") {
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for (var i = savedBoards[wid].length - 1; i >= 0; i--) {
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//Remove old textbox tex -> dont store it twice
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if (
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savedBoards[wid][i]["t"] === "setTextboxText" &&
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savedBoards[wid][i]["d"][0] === content["d"][0]
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) {
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savedBoards[wid].splice(i, 1);
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}
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}
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}
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savedBoards[wid].push(content);
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}
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if (config.backend.enableFileDatabase) {
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//Save whiteboard to file
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if (!saveDelay) {
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saveDelay = true;
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setTimeout(function () {
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saveDelay = false;
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fs.writeFile("savedBoards.json", JSON.stringify(savedBoards), (err) => {
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if (err) {
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return console.log(err);
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}
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});
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}, 1000 * 10); //Save after 10 sec
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}
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}
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},
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loadStoredData: function (wid) {
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//Load saved whiteboard
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return savedBoards[wid] ? savedBoards[wid] : [];
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},
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};
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