New command: list.

For admin users, lists all users.
For other users, only list connected users.

config.py

@@ -55,6 +55,11 @@ class UserDB:
         except Exception:
             return None
 
+    def user_list(self):
+        result = list(self.users.keys())
+        result.sort()
+        return result
+
 
 def load_userdb_from_content(content):
     userdb = UserDB()

server.py

@@ -45,5 +45,20 @@ class Server:
             else:
                 return False, "You are not currently logged in"
 
+        elif command == "list":
+            if context.current_user:
+                logins = self.users.user_list()
+                result = []
+                for l in logins:
+                    relevant_contexts = filter(lambda context: context.check_current_user(l), self.contexts)
+                    connected = list(relevant_contexts) != []
+                    if connected:
+                        result.append("* %s" % l)
+                    elif context.current_user['admin']:
+                        result.append("  %s" % l)
+                return True, "\n".join(result)
+            else:
+                return False, "You are not currently logged in"
+
         else:
             return False, "Invalid command"

test_server.py

@@ -74,7 +74,6 @@ def test_whoami():
 
 
 
-
 # Invalid command
 
 def test_invalid_command():
@@ -85,3 +84,33 @@ def test_invalid_command():
     result, answer = s.execute(context, "invalid")
     assert result == False
     assert answer == "Invalid command"
+
+
+
+# List
+
+def test_list_users_from_admin():
+    c = config.Config()
+    s = server.Server(c)
+    context = s.new_context()
+    result, answer = s.execute(context, "login admin admin")
+
+    result, answer = s.execute(context, "list")
+    assert result == True
+    assert answer == "* admin\n  guest"
+
+
+def test_list_users_from_guest():
+    c = config.Config()
+    s = server.Server(c)
+    context = s.new_context()
+
+    result, answer = s.execute(context, "list")
+    assert result == False
+    assert answer == "You are not currently logged in"
+
+    result, answer = s.execute(context, "login guest guest")
+
+    result, answer = s.execute(context, "list")
+    assert result == True
+    assert answer == "* guest"