Track / expose a list of registered users.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3949 ed5197a5-7fde-0310-b194-c3ffbd925b24

core/auth.js

@@ -101,6 +101,19 @@ function handler(request, response) {
 				if (formData.register == "1") {
 					if (!account &&
 						formData.password == formData.confirm) {
+						let users = new Set();
+						let users_original = gDatabase.get('users');
+						try {
+							users = new Set(JSON.parse(users_original));
+						} catch {
+						}
+						if (!users.has(formData.name)) {
+							users.add(formData.name);
+						}
+						users = JSON.stringify([...users].sort());
+						if (users !== users_original) {
+							gDatabase.set('users', users);
+						}
 						writeSession(session, {name: formData.name});
 						account = {password: hashPassword(formData.password)};
 						gDatabase.set("user:" + formData.name, JSON.stringify(account));

core/core.js

@@ -172,6 +172,13 @@ async function getProcessBlob(blobId, key, options) {
 						}
 					},
 					'user': getUser(process, process),
+					'users': function() {
+						try {
+							return JSON.parse(new Database('auth').get('users'));
+						} catch {
+							return [];
+						}
+					},
 					'apps': user => getApps(user, process),
 					'getSockets': getSockets,
 					'permissionTest': function(permission) {