Replace index page by a map where you can optionally start a pad

frontend/.htaccess

@@ -1,3 +1,6 @@
 RewriteEngine on
+
+RewriteRule ^$ build/index.html
+
 RewriteCond %{REQUEST_FILENAME} !-f
 RewriteRule ^.+$ build/index.html

frontend/app/app.js

@@ -29,7 +29,6 @@ var FacilPad = {
 	});
 
 	fp.app.run([ "$rootScope", "fpUtils", function($rootScope, fpUtils) {
-		$rootScope.padId = location.pathname.match(/[^\/]*$/)[0];
 		$rootScope.urlPrefix = location.protocol + "//" + location.host + location.pathname.replace(/[^\/]*$/, "");
 
 		$rootScope.round = fpUtils.round;
@@ -79,14 +78,19 @@ var FacilPad = {
 	};
 
 	fp.app.controller("PadCtrl", function($scope, fpMap, $timeout) {
+		$scope.padId = location.pathname.match(/[^\/]*$/)[0];
+
 		$timeout(function() {
 			var map = fpMap.getMap("map");
 
-			if(map.socket.padData)
-				$scope.padName = map.socket.padData.name;
 			map.socket.$watch("padData.name", function(newVal) {
 				$scope.padName = newVal;
 			});
+
+			map.socket.$watch("padId", function(padId) {
+				if(padId)
+					history.replaceState(null, "", $scope.urlPrefix + padId);
+			});
 		}, 0);
 
 	});

frontend/app/map/map/map.html

@@ -4,7 +4,7 @@
 		<img src="spinner.gif" alt="Loading…">
 	</div>
 </div>
-<div class="fp-map-disabled-cover" ng-show="!loaded || disconnected"></div>
+<div class="fp-map-disabled-cover" ng-show="disconnected || serverError"></div>
-<div class="fp-map-loading" ng-hide="loaded">
+<div class="fp-map-loading" ng-hide="loaded || serverError">
 	Loading...
 </div>

frontend/app/map/map/map.js

@@ -19,20 +19,18 @@
 		};
 
 		ret.initMap = function(el, id, padId) {
-			return maps[id] = new Map(el, id, padId);
+			return maps[id] = new Map(el, padId);
 		};
 
 		return ret;
 
-		function Map(el, id, padId) {
+		function Map(el, padId) {
 			var map = this;
 
 			map.el = el;
 			map.mapEvents = $rootScope.$new(true); /* Event types: click, layerchange */
 			map.socket = fpSocket(padId);
 
-			//map.socket.id = id; // To be in scope for template
-
 			map.layers = { };
 			[
 				L.tileLayer("http://korona.geog.uni-heidelberg.de/tiles/roads/x={x}&y={y}&z={z}", {
@@ -91,9 +89,12 @@
 				direction: "right"
 			};
 
+			var scope = map.socket.$new();
+			scope.loaded = false;
+
 			var tpl = $($templateCache.get("map/map/map.html"));
 			el.append(tpl);
-			$compile(tpl)(map.socket);
+			$compile(tpl)(scope);
 
 			map.map = L.map(el.find(".fp-map")[0]);
 
@@ -268,18 +269,22 @@
 
 			fpMapLegend(map);
 
-			var loadedWatcher = map.socket.$watch("loaded", function(loaded) {
+			if(padId) {
-				if(loaded) {
+				var loadedWatcher = map.socket.$watch("padData", function(padData) {
-					setTimeout(function() {
+					if(padData != null) {
-						map.displayView(map.socket.padData.defaultView);
-					}, 0);
 						loadedWatcher();
+						map.displayView(padData.defaultView);
+						scope.loaded = true;
 					}
 				});
+			} else {
+				map.displayView();
+				scope.loaded = true;
+			}
 
 			var errorMessage = null;
 			map.socket.$watch("disconnected", function(disconnected) {
-				if(disconnected && !errorMessage)
+				if(disconnected && !errorMessage && !map.socket.serverError)
 					errorMessage = map.messages.showMessage("danger", "The connection to the server was lost.");
 				else if(!disconnected && errorMessage) {
 					errorMessage.close();
@@ -287,7 +292,15 @@
 				}
 			});
 
+			map.socket.$watch("serverError", function(serverError) {
+				if(serverError) {
+					errorMessage && errorMessage.close();
+					map.messages.showMessage("danger", serverError);
+				}
+			});
+
 			map.map.on("moveend", function() {
+				if(map.socket.padId)
 					map.socket.updateBbox(fpUtils.leafletToFpBbox(map.map.getBounds(), map.map.getZoom()));
 			});
 		}

frontend/app/map/pad/pad-settings.html

@@ -1,28 +1,38 @@
 <div class="modal-header">
 	<button class="close" ng-click="$dismiss()"><span aria-hidden="true">&times;</span></button>
-	<h3 class="modal-title">Pad settings</h3>
+	<h3 class="modal-title">{{create ? 'Start collaborative map' : 'Pad settings'}}</h3>
 </div>
 <div class="modal-body">
 	<form class="form-horizontal">
 		<div uib-alert class="alert-danger" ng-show="error">{{error}}</div>
 		
 		<div class="form-group">
-			<label for="pad-link-input" class="col-sm-3 control-label">Link</label>
+			<label for="pad-link-input" class="col-sm-3 control-label">Edit-only Link</label>
-			<div class="col-sm-9"><input id="pad-link-input" value="{{urlPrefix}}{{padId}}" class="form-control" readonly /></div>
+			<div class="col-sm-9">
+				<div class="input-group">
+					<span class="input-group-addon">{{urlPrefix}}</span>
+					<input id="pad-link-input" ng-model="writeId" class="form-control" />
+				</div>
+			</div>
 		</div>
 
 		<div class="form-group">
 			<label for="pad-rolink-input" class="col-sm-3 control-label">Read-only link</label>
-			<div class="col-sm-9"><input id="pad-rolink-input" value="{{urlPrefix}}{{padData.id}}" class="form-control" readonly /></div>
+			<div class="col-sm-9">
+				<div class="input-group">
+					<span class="input-group-addon">{{urlPrefix}}</span>
+					<input id="pad-rolink-input" ng-model="readId" class="form-control" />
+				</div>
+			</div>
 		</div>
 
 		<div class="form-group">
 			<label for="pad-name-input" class="col-sm-3 control-label">Pad name</label>
-			<div class="col-sm-9"><input id="pad-name-input" ng-model="padData.name" class="form-control" /></div>
+			<div class="col-sm-9"><input id="pad-name-input" ng-model="padName" class="form-control" /></div>
 		</div>
 	</form>
 </div>
 <div class="modal-footer">
 	<button type="button" class="btn btn-default" ng-click="$dismiss()">Cancel</button>
-	<button type="button" class="btn btn-primary" ng-click="save()">Save</button>
+	<button type="button" class="btn btn-primary" ng-click="save()">{{create ? 'Create' : 'Save'}}</button>
 </div>

frontend/app/map/pad/pad.js

@@ -3,23 +3,30 @@
 	fp.app.factory("fpMapPad", function($uibModal, fpUtils) {
 		return function(map) {
 			var ret = {
-				editPadSettings : function() {
+				createPad : function() {
+					ret.editPadSettings(true);
+				},
+				editPadSettings : function(create) {
 					var dialog = $uibModal.open({
 						templateUrl: "map/pad/pad-settings.html",
 						scope: map.socket,
 						controller: "fpMapPadSettingsCtrl",
 						size: "lg",
 						resolve: {
-							map: function() { return map; }
+							map: function() { return map; },
+							create: function() { return create; }
 						}
 					});
 
+					if(!create) {
+						// TODO: use child scope!
 						var preserve = fpUtils.preserveObject(map.socket, "padData", "padData", function() {
 							dialog.dismiss();
 						});
 
 						dialog.result.then(preserve.leave.bind(preserve), preserve.revert.bind(preserve));
 					}
+				}
 			};
 
 			/*
@@ -43,16 +50,43 @@
 		};
 	});
 
-	fp.app.controller("fpMapPadSettingsCtrl", function($scope, map) {
+	fp.app.controller("fpMapPadSettingsCtrl", function($scope, map, create, fpUtils) {
+		$scope.create = create;
+
+		if(create) {
+			$scope.writeId = fpUtils.generateRandomPadId(14);
+			$scope.readId = fpUtils.generateRandomPadId(12);
+			$scope.padName = "New FacilPad";
+		} else {
+			$scope.writeId = map.socket.padData.writeId;
+			$scope.readId = map.socket.padData.id;
+			$scope.padName = map.socket.padData.name;
+		}
+
 		$scope.save = function() {
-			var padData = $.extend({ }, map.socket.padData);
+			var newData = {
-			delete padData.defaultView;
+				name: $scope.padName,
-			map.socket.emit("editPad", padData, function(err) {
+				id: $scope.readId,
+				writeId: $scope.writeId
+			};
+
+			if(create) {
+				map.socket.emit("createPad", newData, function(err) {
+					if(err)
+						return $scope.error = err;
+
+					map.socket.updateBbox(fpUtils.leafletToFpBbox(map.map.getBounds(), map.map.getZoom()));
+
+					$scope.$close();
+				});
+			} else {
+				map.socket.emit("editPad", newData, function(err) {
 					if(err)
 						return $scope.error = err;
 
 					$scope.$close();
 				});
+			}
 		};
 	});
 

frontend/app/map/toolbox/toolbox.html

@@ -3,7 +3,10 @@
 	<nav class="navbar navbar-default" ng-class="{'hidden-xs': !showXs}">
 		<div class="container-fluid" id="fp-toolbox-content">
 			<ul class="nav navbar-nav">
-				<li role="presentation" uib-dropdown ng-if="!readonly">
+				<li role="presentation" ng-if="!padId">
+					<a href="javascript:" ng-click="startPad()">Start collaborative map</a>
+				</li>
+				<li role="presentation" uib-dropdown ng-if="!readonly && padId">
 					<a href="javascript:" id="toolbox-add-dropdown" uib-dropdown-toggle role="button">Add <span class="caret"></span></a>
 					<ul uib-dropdown-menu aria-labelledby="toolbox-add-dropdown">
 						<li ng-repeat="type in types"><a href="javascript:" ng-click="addObject(type)">{{type.name}}</a></li>
@@ -11,7 +14,7 @@
 						<li><a href="javascript:" ng-click="editObjectTypes()">Manage types</a></li>
 					</ul>
 				</li>
-				<li role="presentation" uib-dropdown>
+				<li role="presentation" uib-dropdown ng-if="padId">
 					<a href="javascript:" id="toolbox-views-dropdown" uib-dropdown-toggle role="button">Saved views <span class="caret"></span></a>
 					<ul uib-dropdown-menu aria-labelledby="toolbox-views-dropdown">
 						<li ng-repeat="(id, view) in views"><a href="javascript:" ng-click="displayView(view)">{{view.name}}</a></li>
@@ -36,9 +39,9 @@
 					<ul uib-dropdown-menu aria-labelledby="toolbox-layers-dropdown" class="dropdown-menu-right">
 						<!--<li ng-if="!readonly"><a href="javascript:" ng-click="openDialog('copy-pad-dialog')">Copy pad</a></li>-->
 						<!--<li><a href="javascript:" ng-click="importFile()">Import File</a></li>-->
-						<li><a href="javascript:" ng-click="exportGpx()">Export GPX</a></li>
+						<li ng-if="padId"><a href="javascript:" ng-click="exportGpx()">Export GPX</a></li>
-						<li><a href="javascript:" ng-click="showTable()">View as table</a></li>
+						<li ng-if="padId"><a href="javascript:" ng-click="showTable()">View as table</a></li>
-						<li ng-if="!readonly"><a href="javascript:" ng-click="editPadSettings()">Settings</a></li>
+						<li ng-if="!readonly && padId"><a href="javascript:" ng-click="editPadSettings()">Settings</a></li>
 						<li><a href="javascript:" ng-click="showAbout()">About FacilPad</a></li>
 					</ul>
 				</li>

frontend/app/map/toolbox/toolbox.js

@@ -43,6 +43,10 @@
 				map.aboutUi.showAbout();
 			};
 
+			scope.startPad = function() {
+				map.padUi.createPad();
+			};
+
 			var ret = {
 				div: $($templateCache.get("map/toolbox/toolbox.html"))
 			};

frontend/app/socket/socket.js

@@ -5,7 +5,6 @@
 		return function(padId) {
 			var scope = $rootScope.$new();
 
-			scope.padId = padId;
 			scope.padData = null;
 			scope.readonly = null;
 			scope.markers = { };
@@ -41,16 +40,21 @@
 				return socket.emit.apply(socket, arguments);
 			};
 
+			scope.on("serverError", function(data) {
+				scope.serverError = data;
+			});
+
 			scope.on("padData", function(data) {
 				scope.padData = data;
 
 				if(data.writable != null)
 					scope.readonly = !data.writable;
 
-				scope.disconnected = false;
+				var id = scope.readonly ? data.id : data.writeId;
+				if(id != null)
+					scope.padId = id;
 
-				if(!scope.loaded)
+				scope.disconnected = false;
-					scope.loaded = true;
 			});
 
 			scope.on("marker", function(data) {
@@ -128,17 +132,31 @@
 			});
 
 			scope.on("reconnect", function() {
+				if(scope.padId)
 					scope.emit("setPadId", scope.padId);
+				else
+					scope.disconnected = false; // Otherwise it gets set when padData arrives
+
+				if(scope.bbox)
 					scope.emit("updateBbox", scope.bbox);
 			});
 
+			scope.setPadId = function(padId) {
+				if(scope.padId != null)
+					return;
+
+				scope.padId = padId;
+				scope.emit("setPadId", padId);
+			};
+
 			scope.updateBbox = function(bbox) {
 				scope.emit("updateBbox", bbox);
 
 				scope.bbox = bbox;
 			};
 
-			scope.emit("setPadId", scope.padId);
+			if(padId)
+				scope.setPadId(padId);
 
 			scope.$on("$destroy", function() {
 				socket.removeAllListeners();

frontend/app/utils/utils.js

@@ -7,9 +7,12 @@
 		var LETTERS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
 		var LENGTH = 12;
 
-		fpUtils.generateRandomPadId = function() {
+		fpUtils.generateRandomPadId = function(length) {
+			if(length == null)
+				length = LENGTH;
+
 			var randomPadId = "";
-			for(var i=0; i<LENGTH; i++) {
+			for(var i=0; i<length; i++) {
 				randomPadId += LETTERS[Math.floor(Math.random() * LETTERS.length)];
 			}
 			return randomPadId;

frontend/index.html

@@ -2,7 +2,7 @@
 <html ng-controller="PadCtrl">
 	<head>
 		<meta charset="utf-8">
-		<title fp-title="padName + ' – FacilPad'">FacilPad</title>
+		<title fp-title="padName ? padName + ' – FacilPad' : 'FacilPad'">FacilPad</title>
 		<meta name="robots" content="index,nofollow" />
 		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
 		<link rel="shortcut icon" href="assets/img/favicon.png">
@@ -20,61 +20,17 @@
 		</style>
 	</head>
 	<body>
-		<div id="introContainer">
-			<h1>FacilPad</h1>
-			<p>Welcome to FacilPad.</p>
 		<noscript><p><strong>FacilPad requires JavaScript to work.</strong></p></noscript>
-			<p><a id="create-pad-link" rel="nofollow">Create a new pad</a></p>
+		<div id="loading" ng-if="false">Loading...</div>
-		</div>
-		<div id="loading" style="display:none">Loading...</div>
-		<div id="mapContainer" style="display:none">
 		<div id="map" fp-map fp-pad-id="{{padId}}"></div>
-		</div>
 
 		<script>
-			(function() {
+			var interval = setInterval(function() {
-				var loaded = 0;
+				if(window.angular != null && window.io != null) {
-
-				var l = document.getElementById("create-pad-link");
-
-				var LETTERS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
-				var LENGTH = 12;
-
-				var randomPadId = "";
-				for(var i=0; i<LENGTH; i++) {
-					randomPadId += LETTERS[Math.floor(Math.random() * LETTERS.length)];
-				}
-
-				l.href = randomPadId;
-
-				l.onclick = function() {
-					if(window.history && history.pushState) {
-						history.pushState(null, null, randomPadId);
-						check();
-						return false;
-					}
-				};
-
-				var interval = setInterval(check, 100);
-
-				function check() {
-					if(loaded == 0 && !location.pathname.match(/\/$/)) {
-						document.getElementById("introContainer").style.display = "none";
-						document.getElementById("loading").style.display = "";
-
-						loaded = 1;
-					}
-					if(loaded == 1 && window.FacilPad != null && window.io != null && $("#map").css("height") == "100%") {
-						$("#introContainer,#loading").remove();
-						$("#map").unwrap();
-						angular.bootstrap(document, [ "facilpad" ]);
-						loaded = 2;
 					clearInterval(interval);
+					angular.bootstrap(document, [ "facilpad" ]);
 				}
-				}
+			}, 100);
-
-				check();
-			})();
 		</script>
 
 		<!-- inject:js -->

server/lib/database.js

@@ -16,22 +16,29 @@ function getPadData(padId, callback) {
 		if(err)
 			return callback(err);
 		else if(data != null)
-			return callback(null, utils.extend(JSON.parse(JSON.stringify(data)), { writable: true, writeId: null }));
+			return callback(null, utils.extend(JSON.parse(JSON.stringify(data)), { writable: true }));
 
 		backend.getPadData(padId, function(err, data) {
-			if(err || data != null)
+			if(err)
-				return callback(err, utils.extend(JSON.parse(JSON.stringify(data)), { writable: false, writeId: null }));
+				return callback(err);
 
-			backend.createPad(utils.generateRandomId(10), padId, function(err, data) {
+			if(data == null)
+				return callback("This pad does not exist.");
+
+			return callback(null, utils.extend(JSON.parse(JSON.stringify(data)), { writable: false, writeId: null }));
+		});
+	});
+}
+
+function createPad(data, callback) {
+	backend.createPad(data, function(err, data) {
 		if(err)
 			return callback(err);
 
 		async.each(DEFAULT_TYPES, function(it, next) {
 			backend.createType(data.id, it, next);
 		}, function(err) {
-					callback(err, utils.extend(JSON.parse(JSON.stringify(data)), { writable: true, writeId: null }));
+			callback(err, utils.extend(JSON.parse(JSON.stringify(data)), { writable: true }));
-				});
-			});
 		});
 	});
 }
@@ -41,7 +48,17 @@ function updatePadData(padId, data, callback) {
 		if(err)
 			return callback(err);
 
-		listeners.notifyPadListeners(padId, "padData", data);
+		listeners.notifyPadListeners(padId, "padData", function(listener) {
+			var dataClone = JSON.parse(JSON.stringify(data));
+			if(!listener.writable)
+				dataClone.writeId = null;
+
+			return dataClone;
+		});
+
+		if(data.id && data.id != padId)
+			listeners.changePadId(padId, data.id);
+
 		callback(null, data);
 	});
 }
@@ -350,8 +367,8 @@ function _setLinePoints(padId, lineId, trackPoints, callback) {
 		if(err)
 			return callback(err);
 
-		listeners.notifyPadListeners(padId, "linePoints", function(bboxWithZoom) {
+		listeners.notifyPadListeners(padId, "linePoints", function(listener) {
-			return { reset: true, id: lineId, trackPoints : (bboxWithZoom ? routing.prepareForBoundingBox(trackPoints, bboxWithZoom) : [ ]) };
+			return { reset: true, id: lineId, trackPoints : (listener && listener.bbox ? routing.prepareForBoundingBox(trackPoints, listener.bbox) : [ ]) };
 		});
 
 		callback(null);
@@ -478,8 +495,8 @@ function _calculateRouting(line, callback) {
 }
 
 function _getMarkerDataFunc(marker) {
-	return function(bbox) {
+	return function(listener) {
-		if(!bbox || !utils.isInBbox(marker, bbox))
+		if(!listener || !listener.bbox || !utils.isInBbox(marker, listener.bbox))
 			return null;
 
 		return marker;
@@ -513,6 +530,7 @@ function _getLinePoints(lineId, bboxWithZoom, callback) {
 module.exports = {
 	connect : backend.connect,
 	getPadData : getPadData,
+	createPad : createPad,
 	updatePadData : updatePadData,
 	getViews : getViews,
 	createView : createView,

server/lib/databaseBackendSequelize.js

@@ -62,9 +62,9 @@ function _makeNotNullForeignKey(type, field, error) {
 /* Pads */
 
 var Pad = conn.define("Pad", {
-	id : { type: Sequelize.STRING, allowNull: false, unique: "padId", primaryKey: true },
+	id : { type: Sequelize.STRING, allowNull: false, unique: "padId", primaryKey: true, validate: { is: /^.+$/ } },
 	name: { type: Sequelize.TEXT, allowNull: true, get: function() { return this.getDataValue("name") || "New FacilPad"; } },
-	writeId: { type: Sequelize.STRING, allowNull: false, unique: "padId" }
+	writeId: { type: Sequelize.STRING, allowNull: false, unique: "padId", validate: { is: /^.+$/ } }
 });
 
 
@@ -262,8 +262,8 @@ function getPadDataByWriteId(writeId, callback) {
 	_promiseComplete(Pad.findOne({ where: { writeId: writeId }, include: [ { model: View, as: "defaultView" } ] }), callback);
 }
 
-function createPad(padId, writeId, callback) {
+function createPad(data, callback) {
-	_promiseComplete(Pad.create({ id: padId, writeId: writeId }), callback);
+	_promiseComplete(Pad.create(data), callback);
 }
 
 function updatePadData(padId, data, callback) {
@@ -272,7 +272,7 @@ function updatePadData(padId, data, callback) {
 			_promiseComplete(Pad.update(data, { where: { id: padId } }), next);
 		},
 		function(affectedNumber, next) {
-			getPadData(padId, next);
+			getPadData(data.id || padId, next);
 		}
 	], callback);
 }

server/lib/listeners.js

@@ -7,7 +7,7 @@ function notifyPadListeners(padId, eventType, getData) {
 	var isFunc = (typeof getData == "function");
 
 	( listeners[padId] || [ ]).forEach(function(listener) {
-		var data = isFunc ? getData(listener.bbox) : getData;
+		var data = isFunc ? getData(listener) : getData;
 		if(data == null)
 			return;
 
@@ -34,8 +34,21 @@ function removePadListener(listener) {
 	listeners[listener.padId] = l.slice(0, idx).concat(l.slice(idx+1));
 }
 
+function changePadId(oldPadId, newPadId) {
+	if(oldPadId == newPadId)
+		return;
+
+	listeners[newPadId] = listeners[oldPadId];
+	delete listeners[oldPadId];
+
+	listeners[newPadId].forEach(function(listener) {
+		listener.padId = newPadId;
+	});
+}
+
 module.exports = {
 	notifyPadListeners : notifyPadListeners,
 	addPadListener : addPadListener,
-	removePadListener: removePadListener
+	removePadListener: removePadListener,
+	changePadId: changePadId
 };

server/lib/server.js

@@ -66,19 +66,7 @@ database.connect(function(err) {
 					if(err)
 						return _sendData(socket, "padData", err);
 
-					socket.padId = data.id;
+					_setPadId(socket, data);
-					socket.writable = data.writable;
-					listeners.addPadListener(socket);
-
-					_sendData(socket, "padData", null, data);
-					_sendStreamData(socket, "view", database.getViews(socket.padId));
-					_sendStreamData(socket, "type", database.getTypes(socket.padId));
-					_sendStreamData(socket, "line", database.getPadLines(socket.padId));
-
-					if(socket.bbox) { // In case bbox is set while fetching pad data
-						_sendStreamData(socket, "marker", database.getPadMarkers(socket.padId, socket.bbox));
-						_sendStreamData(socket, "linePoints", database.getLinePoints(socket.padId, socket.bbox));
-					}
 				});
 			},
 
@@ -103,8 +91,25 @@ database.connect(function(err) {
 					listeners.removePadListener(socket);
 			},
 
+			createPad : function(data, callback) {
+				if(!utils.stripObject(data, { name: "string", defaultViewId: "number", id: "string", writeId: "string" }))
+					return callback("Invalid parameters.");
+
+				if(socket.padId)
+					return callback("Pad already loaded.");
+
+				database.createPad(data, function(err, padData) {
+					if(err)
+						return callback(err);
+
+					_setPadId(socket, padData);
+
+					callback(null, padData);
+				});
+			},
+
 			editPad : function(data, callback) {
-				if(!utils.stripObject(data, { name: "string", defaultViewId: "number" }))
+				if(!utils.stripObject(data, { name: "string", defaultViewId: "number", id: "string", writeId: "string" }))
 					return callback("Invalid parameters.");
 
 				if(!socket.writable)
@@ -241,6 +246,9 @@ database.connect(function(err) {
 			},
 
 			exportGpx : function(data, callback) {
+				if(socket.padId == null)
+					return callback("No pad ID set.");
+
 				gpx.exportGpx(socket.padId, data.useTracks, callback);
 			},
 
@@ -278,7 +286,9 @@ database.connect(function(err) {
 function _sendData(socket, eventName, err, data) {
 	if(err) {
 		console.warn("_sendData", err, err.stack);
-		return socket.emit("error", err);
+		socket.emit("serverError", err);
+		socket.disconnect();
+		return;
 	}
 
 	socket.emit(eventName, data);
@@ -293,3 +303,19 @@ function _sendStreamData(socket, eventName, stream) {
 		socket.emit("error", err);
 	})
 }
+
+function _setPadId(socket, data) {
+	socket.padId = data.id;
+	socket.writable = data.writable;
+	listeners.addPadListener(socket);
+
+	_sendData(socket, "padData", null, data);
+	_sendStreamData(socket, "view", database.getViews(socket.padId));
+	_sendStreamData(socket, "type", database.getTypes(socket.padId));
+	_sendStreamData(socket, "line", database.getPadLines(socket.padId));
+
+	if(socket.bbox) { // In case bbox is set while fetching pad data
+		_sendStreamData(socket, "marker", database.getPadMarkers(socket.padId, socket.bbox));
+		_sendStreamData(socket, "linePoints", database.getLinePoints(socket.padId, socket.bbox));
+	}
+}