Added createWebApiKey method

components/webapi.js

@@ -1,49 +1,152 @@
-var SteamCommunity = require('../index.js');
+const SteamCommunity = require('../index.js');
 
 const Helpers = require('./helpers.js');
 
-SteamCommunity.prototype.getWebApiKey = function(domain, callback) {
-	var self = this;
+/**
+ * Retrieves your account's Steam Web API key, if you already have one. If you don't yet have one, this will fail.
+ * To create a Web API key, use `createWebApiKey()`.
+ *
+ * @param {null|function} unused - No longer used, kept for backward compatibility. You can omit this parameter and pass
+ *    your callback directly as the first parameter if you want.
+ * @param {function} callback
+ */
+SteamCommunity.prototype.getWebApiKey = function(unused, callback) {
+	if (typeof unused == 'function') {
+		callback = unused;
+	}
+
 	this.httpRequest({
-		"uri": "https://steamcommunity.com/dev/apikey?l=english",
-		"followRedirect": false
-	}, function(err, response, body) {
+		uri: 'https://steamcommunity.com/dev/apikey?l=english',
+		followRedirect: false
+	}, (err, response, body) => {
 		if (err) {
 			callback(err);
 			return;
 		}
 
-		if(body.match(/<h2>Access Denied<\/h2>/)) {
-			return callback(new Error("Access Denied"));
+		if (body.match(/You must have a validated email address to create a Steam Web API key./)) {
+			return callback(new Error('You must have a validated email address to create a Steam Web API key.'));
 		}
 
-		if(body.match(/You must have a validated email address to create a Steam Web API key./)) {
-			return callback(new Error("You must have a validated email address to create a Steam Web API key."));
+		if (body.match(/Your account requires (<a [^>]+>)?Steam Guard Mobile Authenticator/)) {
+			return callback(new Error('Steam Guard Mobile Authenticator required to create a Steam Web API key'));
 		}
 
-		var match = body.match(/<p>Key: ([0-9A-F]+)<\/p>/);
-		if(match) {
+		if (body.match(/<h2>Access Denied<\/h2>/)) {
+			return callback(new Error('Access Denied'));
+		}
+
+		let match = body.match(/<p>Key: ([0-9A-F]+)<\/p>/);
+		if (match) {
 			// We already have an API key registered
 			callback(null, match[1]);
 		} else {
-			// We need to register a new API key
-			self.httpRequestPost('https://steamcommunity.com/dev/registerkey?l=english', {
-				"form": {
-					"domain": domain,
-					"agreeToTerms": "agreed",
-					"sessionid": self.getSessionID(),
-					"Submit": "Register"
-				}
-			}, function(err, response, body) {
-				if (err) {
-					callback(err);
+			callback(new Error('No API key created for this account'));
+		}
+	}, "steamcommunity");
+};
+
+/**
+ * @typedef CreateApiKeyOptions
+ * @property {string} domain - The domain to associate with your API key
+ * @property {string} [requestID] - If finalizing an existing create request, include the request ID
+ * @property {string|Buffer} [identitySecret] - If you pass your identity_secret here, then steamcommunity will
+ *   internally handle accepting any confirmations.
+ */
+
+/**
+ * @typedef CreateApiKeyResponse
+ * @property {boolean} confirmationRequired
+ * @property {string} [apiKey] - If creating your API key succeeded, this is the new key
+ * @property {CreateApiKeyOptions} [finalizeOptions] - If confirmation is required to create a key, then accept the
+ *   confirmation, then call createWebApiKey again and pass this whole object for the `options` parameter.
+ */
+
+/**
+ * @callback createWebApiKeyCallback
+ * @param {Error|null} err
+ * @param {CreateApiKeyResponse} [result]
+ */
+
+/**
+ * Starts the process to create a Steam Web API key. When the callback is fired, you will need to approve a mobile
+ * confirmation in your app or using getConfirmations().
+ *
+ * @param {CreateApiKeyOptions} options
+ * @param {createWebApiKeyCallback} callback
+ */
+SteamCommunity.prototype.createWebApiKey = function(options, callback) {
+	if (!options.domain) {
+		callback(new Error('Passing a domain is required to register an API key'));
+		return;
+	}
+
+	this.httpRequestPost({
+		uri: 'https://steamcommunity.com/dev/requestkey',
+		form: {
+			domain: options.domain,
+			request_id: options.requestID || '0',
+			sessionid: this.getSessionID(),
+			agreeToTerms: 'true'
+		},
+		json: true
+	}, (err, res, body) => {
+		if (err) {
+			callback(err);
+			return;
+		}
+
+		// body.requires_confirmation is 1/0, but the Steam website doesn't check this value and instead only checks the
+		// value of `success`. So let's just do that.
+
+		// This is a mess. I'm glad we have promises and await now.
+
+		switch (body.success) {
+			case SteamCommunity.EResult.OK:
+				if (body.api_key) {
+					callback(null, {confirmationRequired: false, apiKey: body.api_key});
 					return;
 				}
 
-				self.getWebApiKey(domain, callback);
-			}, "steamcommunity");
+				// It's not been observed that we get result OK without api_key included, but the Steam website doesn't
+				// use this value so let's be safe just in case it disappears in the future.
+				this.getWebApiKey((err, key) => {
+					if (err) {
+						callback(err);
+						return;
+					}
+
+					callback(null, {confirmationRequired: false, apiKey: key});
+				});
+				return;
+
+			case SteamCommunity.EResult.Pending:
+				let finalizeOptions = {
+					domain: options.domain,
+					requestID: body.request_id || options.requestID
+				}
+
+				if (options.identitySecret) {
+					this.acceptConfirmationForObject(options.identitySecret, finalizeOptions.requestID, (err) => {
+						if (err) {
+							callback(err);
+						} else {
+							this.createWebApiKey(finalizeOptions, callback);
+						}
+					});
+					return;
+				}
+
+				callback(null, {
+					confirmationRequired: true,
+					finalizeOptions: finalizeOptions
+				});
+				return;
+
+			default:
+				callback(Helpers.eresultError(body.success));
 		}
-	}, "steamcommunity");
+	});
 };
 
 /**