frontend password change functionality

- refactor clientManager.js to allow configuration parsing as a serparate
  function.
  - refactor clientManager.js to add configuration writing function.
  - add server.js changes to allow for new password-change functionality
  - add password change ui to "settings" screen
  - refactor client.js to use new clientManager functionality for saving
    the configuration files

client/css/style.css

@@ -1116,6 +1116,19 @@ button,
 	line-height: 1.8;
 }
 
+#settings #change-password .error,
+#settings #change-password .success {
+	margin-bottom: 1em;
+}
+
+#settings #change-password .error {
+	color: #e74c3c;
+}
+
+#settings #change-password .success {
+	color: #2ecc40;
+}
+
 #form {
 	background: #eee;
 	border-top: 1px solid #ddd;

client/index.html

@@ -265,6 +265,31 @@
 									Enable notification for all messages
 								</label>
 							</div>
+							<% if (!public) { %>
+							<div id="change-password">
+								<form action="" method="post">
+									<div class="col-sm-12">
+										<h2>Change password</h2>
+									</div>
+									<div class="col-sm-12">
+										<label for="old_password" class="sr-only">Enter current password</label>
+										<input type="password" name="old_password" class="input" placeholder="Enter current password">
+									</div>
+									<div class="col-sm-12">
+										<label for="new_password" class="sr-only">Enter desired new password</label>
+										<input type="password" name="new_password" class="input" placeholder="Enter desired new password">
+									</div>
+									<div class="col-sm-12">
+										<label for="verify_password" class="sr-only">Repeat new password</label>
+										<input type="password" name="verify_password" class="input" placeholder="Repeat new password">
+									</div>
+									<div class="col-sm-12 feedback"></div>
+									<div class="col-sm-12">
+										<button type="submit" class="btn">Change password</button>
+									</div>
+								</form>
+							</div>
+							<% } %>
 							<div class="col-sm-12">
 								<h2>About The Lounge</h2>
 							</div>

client/js/lounge.js

@@ -112,6 +112,31 @@ $(function() {
 			.show();
 	});
 
+	socket.on("change-password", function(data) {
+		var passwordForm = $("#change-password");
+		if (data.error || data.success) {
+			var message = data.success ? data.success : data.error;
+			var feedback = passwordForm.find(".feedback");
+
+			if (data.success) {
+				feedback.addClass("success").removeClass("error");
+			} else {
+				feedback.addClass("error").removeClass("success");
+			}
+
+			feedback.text(message).show();
+			feedback.closest("form").one("submit", function() {
+				feedback.hide();
+			});
+		}
+		passwordForm
+			.find("input")
+			.val("")
+			.end()
+			.find(".btn")
+			.prop("disabled", false);
+	});
+
 	socket.on("init", function(data) {
 		if (data.networks.length === 0) {
 			$("#footer").find(".connect").trigger("click");
@@ -734,7 +759,7 @@ $(function() {
 	});
 
 	var windows = $("#windows");
-	var forms = $("#sign-in, #connect");
+	var forms = $("#sign-in, #connect, #change-password");
 
 	windows.on("show", "#sign-in", function() {
 		var self = $(this);
@@ -761,6 +786,8 @@ $(function() {
 			.end();
 		if (form.closest(".window").attr("id") === "connect") {
 			event = "conn";
+		} else if (form.closest("div").attr("id") === "change-password") {
+			event = "change-password";
 		}
 		var values = {};
 		$.each(form.serializeArray(), function(i, obj) {

src/client.js

@@ -1,7 +1,6 @@
 var _ = require("lodash");
 var Chan = require("./models/chan");
 var crypto = require("crypto");
-var fs = require("fs");
 var identd = require("./identd");
 var log = require("./log");
 var net = require("net");
@@ -51,14 +50,15 @@ var inputs = [
 	"whois"
 ];
 
-function Client(sockets, name, config) {
+function Client(manager, name, config) {
 	_.merge(this, {
 		activeChannel: -1,
 		config: config,
 		id: id++,
 		name: name,
 		networks: [],
-		sockets: sockets
+		sockets: manager.sockets,
+		manager: manager
 	});
 	var client = this;
 	crypto.randomBytes(48, function(err, buf) {
@@ -221,6 +221,21 @@ Client.prototype.connect = function(args) {
 	});
 };
 
+Client.prototype.setPassword = function(hash) {
+	var client = this;
+	client.manager.updateUser(client.name, {password:hash});
+	// re-read the hash off disk to ensure we use whatever is saved. this will
+	// prevent situations where the password failed to save properly and so
+	// a restart of the server would forget the change and use the old
+	// password again.
+	var user = client.manager.readUserConfig(client.name);
+	if (user.password === hash) {
+		client.config.password = hash;
+		return true;
+	}
+	return false;
+};
+
 Client.prototype.input = function(data) {
 	var client = this;
 	var text = data.text.trim();
@@ -353,9 +368,6 @@ Client.prototype.save = function(force) {
 		return;
 	}
 
-	var name = this.name;
-	var path = Helper.HOME + "/users/" + name + ".json";
-
 	var networks = _.map(
 		this.networks,
 		function(n) {
@@ -364,29 +376,6 @@ Client.prototype.save = function(force) {
 	);
 
 	var json = {};
-	fs.readFile(path, "utf-8", function(err, data) {
-		if (err) {
-			console.log(err);
-			return;
-		}
-
-		try {
-			json = JSON.parse(data);
-			json.networks = networks;
-		} catch (e) {
-			console.log(e);
-			return;
-		}
-
-		fs.writeFile(
-			path,
-			JSON.stringify(json, null, "  "),
-			{mode: "0777"},
-			function(err) {
-				if (err) {
-					console.log(err);
-				}
-			}
-		);
-	});
+	json.networks = networks;
+	client.manager.updateUser(client.name, json);
 };

src/clientManager.js

@@ -29,18 +29,14 @@ ClientManager.prototype.loadUsers = function() {
 
 ClientManager.prototype.loadUser = function(name) {
 	try {
-		var json = fs.readFileSync(
-			Helper.HOME + "/users/" + name + ".json",
-			"utf-8"
-		);
-		json = JSON.parse(json);
+		var json = this.readUserConfig(name);
 	} catch (e) {
 		console.log(e);
 		return;
 	}
 	if (!this.findClient(name)) {
 		this.clients.push(new Client(
-			this.sockets,
+			this,
 			name,
 			json
 		));
@@ -93,6 +89,50 @@ ClientManager.prototype.addUser = function(name, password) {
 	return true;
 };
 
+ClientManager.prototype.updateUser = function(name, opts) {
+	var users = this.getUsers();
+	if (users.indexOf(name) === -1) {
+		return false;
+	}
+	if (typeof opts === "undefined") {
+		return false;
+	}
+	var path = Helper.HOME + "/users/" + name + ".json";
+	var user = {};
+
+	try {
+		user = this.readUserConfig(name);
+		_.merge(user, opts);
+	} catch (e) {
+		console.log(e);
+		return;
+	}
+
+	fs.writeFileSync(
+		path,
+		JSON.stringify(user, null, " "),
+		{mode: "0777"},
+		function(err) {
+			if (err) {
+				console.log(err);
+			}
+		}
+	);
+	return true;
+};
+
+ClientManager.prototype.readUserConfig = function(name) {
+	var users = this.getUsers();
+	if (users.indexOf(name) === -1) {
+		return false;
+	}
+	var path = Helper.HOME + "/users/" + name + ".json";
+	var user = {};
+	var data = fs.readFileSync(path, "utf-8");
+	user = JSON.parse(data);
+	return user;
+};
+
 ClientManager.prototype.removeUser = function(name) {
 	var users = this.getUsers();
 	if (users.indexOf(name) === -1) {

src/server.js

@@ -107,6 +107,51 @@ function init(socket, client, token) {
 				client.connect(data);
 			}
 		);
+		if (!config.public) {
+			socket.on(
+				"change-password",
+				function(data) {
+					var old = data.old_password;
+					var p1 = data.new_password;
+					var p2 = data.verify_password;
+					if (typeof old === "undefined" || old === "") {
+						socket.emit("change-password", {
+							error: "Please enter your current password"
+						});
+						return;
+					}
+					if (typeof p1 === "undefined" || p1 === "") {
+						socket.emit("change-password", {
+							error: "Please enter a new password"
+						});
+						return;
+					}
+					if (p1 !== p2) {
+						socket.emit("change-password", {
+							error: "Both new password fields must match"
+						});
+						return;
+					}
+					if (!bcrypt.compareSync(old || "", client.config.password)) {
+						socket.emit("change-password", {
+							error: "The current password field does not match your account password"
+						});
+						return;
+					}
+					var salt = bcrypt.genSaltSync(8);
+					var hash = bcrypt.hashSync(p1, salt);
+					if (client.setPassword(hash)) {
+						socket.emit("change-password", {
+							success: "Successfully updated your password"
+						});
+						return;
+					}
+					socket.emit("change-password", {
+						error: "Failed to update your password"
+					});
+				}
+			);
+		}
 		socket.on(
 			"open",
 			function(data) {