Added document tool to upload images

client-data/board.html

@@ -94,6 +94,7 @@
 	<script src="../tools/text/text.js"></script>
 	<script src="../tools/eraser/eraser.js"></script>
 	<script src="../tools/hand/hand.js"></script>
+	<script src="../tools/document/document.js"></script>
 	<script src="../tools/grid/grid.js"></script>
 	<script src="../tools/zoom/zoom.js"></script>
 	<script src="../js/canvascolor/canvascolor.min.js"></script>

client-data/tools/document/document.js

@@ -0,0 +1,103 @@
+(function documents() { //Code isolation
+
+
+    var xlinkNS = "http://www.w3.org/1999/xlink";
+    var imgCount = 1;
+
+    function assert_count() {
+        if (Tools.svg.querySelectorAll("image").length >= Tools.server_config.MAX_DOCUMENT_COUNT) {
+            alert("Too many documents exist already");
+            throw new Error("Too many documents exist already");
+        }
+    }
+
+    function onstart() {
+        var fileInput = document.createElement("input");
+        fileInput.type = "file";
+        fileInput.accept = "image/*";
+        fileInput.click();
+        fileInput.addEventListener("change", () => {
+            assert_count();
+
+            var reader = new FileReader();
+            reader.readAsDataURL(fileInput.files[0]);
+
+            reader.onload = function (e) {
+                // use canvas to compress image
+                var image = new Image();
+                image.src = e.target.result;
+                image.onload = function () {
+
+                    assert_count();
+
+                    var uid = Tools.generateUID("doc"); // doc for document
+
+                    var ctx, size;
+                    var scale = 1;
+
+                    do {
+                        // Todo give feedback of processing effort
+
+                        ctx = document.createElement("canvas").getContext("2d");
+                        ctx.canvas.width = image.width * scale;
+                        ctx.canvas.height = image.height * scale;
+                        ctx.drawImage(image, 0, 0, image.width * scale, image.height * scale);
+                        var dataURL = ctx.canvas.toDataURL("image/webp", 0.7);
+
+                        // Compressed file size as data url, approximately 1/3 larger than as bytestream
+                        size = dataURL.length;
+
+                        // attempt again with an image that is at least 10% smaller
+                        scale = scale * Math.sqrt(Math.min(
+                                0.9,
+                                Tools.server_config.MAX_DOCUMENT_SIZE / size
+                        ));
+                    } while (size > Tools.server_config.MAX_DOCUMENT_SIZE);
+
+                    var msg = {
+                        id: uid,
+                        type: "doc",
+                        data: dataURL,
+                        size: size,
+                        w: this.width * scale || 300,
+                        h: this.height * scale || 300,
+                        x: (100 + document.documentElement.scrollLeft) / Tools.scale + 10 * imgCount,
+                        y: (100 + document.documentElement.scrollTop) / Tools.scale + 10 * imgCount
+                        //fileType: fileInput.files[0].type
+                    };
+
+                    assert_count();
+
+                    draw(msg);
+                    Tools.send(msg,"Document");
+                    imgCount++;
+                };
+            };
+            // Tools.change(Tools.prevToolName);
+        });
+    }
+
+    function draw(msg) {
+        var aspect = msg.w/msg.h;
+        var img = Tools.createSVGElement("image");
+        img.id=msg.id;
+        img.setAttribute("class", "layer-"+Tools.layer);
+        img.setAttributeNS(xlinkNS, "href", msg.data);
+        img.x.baseVal.value = msg['x'];
+        img.y.baseVal.value = msg['y'];
+        img.setAttribute("width", 400*aspect);
+        img.setAttribute("height", 400);
+        Tools.drawingArea.appendChild(img);
+
+    }
+
+    Tools.add({
+        "name": "Document",
+        //"shortcut": "",
+        "draw": draw,
+        "onstart": onstart,
+        "oneTouch":true,
+        "icon": "/tools/document/icon.svg",
+    });
+
+})(); //End of code isolation

server/boardData.js

@@ -228,7 +228,11 @@ BoardData.load = async function loadBoard(name) {
 	try {
 		data = await fs.promises.readFile(boardData.file);
 		boardData.board = JSON.parse(data);
-		for (id in boardData.board) boardData.validate(boardData.board[id]);
+		boardData.existingDocuments = 0;
+		for (id in boardData.board) {
+			boardData.validate(boardData.board[id]);
+			if (boardData.board[id].type === "doc") existingDocuments += 1;
+		}
 		log('disk load', { 'board': boardData.name });
 	} catch (e) {
 		log('empty board creation', {

server/client_configuration.js

@@ -2,6 +2,8 @@ const config = require("./configuration");
 
 /** Settings that should be handed through to the clients  */
 module.exports = {
+    "MAX_DOCUMENT_SIZE": config.MAX_DOCUMENT_SIZE,
+    "MAX_DOCUMENT_COUNT": config.MAX_DOCUMENT_COUNT,
     "MAX_BOARD_SIZE": config.MAX_BOARD_SIZE,
     "MAX_EMIT_COUNT": config.MAX_EMIT_COUNT,
     "MAX_EMIT_COUNT_PERIOD": config.MAX_EMIT_COUNT_PERIOD,

server/configuration.js

@@ -26,6 +26,12 @@ module.exports = {
     /** Maximum value for any x or y on the board */
     MAX_BOARD_SIZE: parseInt(process.env['WBO_MAX_BOARD_SIZE']) || 65536,
 
+    /** Maximum size of uploaded documents default 1MB */
+    MAX_DOCUMENT_SIZE: parseInt(process.env['WBO_MAX_DOCUMENT_SIZE']) || 1048576,
+
+    /** Maximum number of documents allowed */
+    MAX_DOCUMENT_COUNT: parseInt(process.env['WBO_MAX_DOCUMENT_COUNT']) || 5,
+
     /** Maximum messages per user over the given time period before banning them  */
     MAX_EMIT_COUNT: parseInt(process.env['WBO_MAX_EMIT_COUNT']) || 128,
 

server/sockets.js

@@ -49,6 +49,7 @@ function socketConnection(socket) {
 		var board = await getBoard(name);
 		board.users.add(socket.id);
 		log('board joined', { 'board': board.name, 'users': board.users.size });
+
 		return board;
 	}
 
@@ -66,7 +67,7 @@ function socketConnection(socket) {
 
 	var lastEmitSecond = Date.now() / config.MAX_EMIT_COUNT_PERIOD | 0;
 	var emitCount = 0;
-	socket.on('broadcast', noFail(function onBroadcast(message) {
+	socket.on('broadcast', noFail(async function onBroadcast(message) {
 		var currentSecond = Date.now() / config.MAX_EMIT_COUNT_PERIOD | 0;
 		if (currentSecond === lastEmitSecond) {
 			emitCount++;
@@ -96,6 +97,28 @@ function socketConnection(socket) {
 			return;
 		}
 
+		var boardData;
+		if (message.data.type === "doc") {
+			boardData = await getBoard(boardName);
+
+			if (boardData.existingDocuments >= config.MAX_DOCUMENT_COUNT) {
+				console.warn("Received too many documents");
+				return;
+			}
+
+			if (message.data.data.length > config.MAX_DOCUMENT_SIZE) {
+				console.warn("Received too large file");
+				return;
+			}
+
+			boardData.existingDocuments += 1;
+		} else if (message.data.type === "delete") {
+			boardData = await getBoard(boardName);
+
+			if (boardData.board[message.data.id].type === "doc") {
+				boardData.existingDocuments -= 1;
+			}
+		}
 
 		// Save the message in the board
 		handleMessage(boardName, data, socket);