Remove dead code from project

src/app/buttons.py

@@ -1,16 +0,0 @@
-from fsm_base import FSMBase
-
-
-class Buttons(FSMBase):
-    states = ['A', 'B', 'C']
-    transitions = [
-        {'trigger': 'anchor_a', 'source': 'A', 'dest': 'B'},
-        {'trigger': 'anchor_b', 'source': 'B', 'dest': 'C'},
-        {'trigger': 'anchor_c', 'source': 'C', 'dest': 'A'},
-    ]
-
-    def __init__(self):
-        super().__init__('A')
-
-
-fsm = Buttons()

src/event_handlers/event_handler_main.py

@@ -1,92 +1,9 @@
-import codecs
-import sqlite3
-from functools import partial
-
-import source_code
-from event_handler_base import EventHandlerBase
 from source_code_event_handler import SourceCodeEventHandler
 from terminado_event_handler import TerminadoEventHandler
 from tornado.ioloop import IOLoop
 
-from login_component import authorize_login
-from util import create_source_code_response_data
-
-login_component_py_response = partial(
-    create_source_code_response_data, filename='login_component.py', language='python'
-)
-
-
-class EchoHandler(EventHandlerBase):
-    def handle_event(self, anchor, data_json):
-        return data_json
-
-
-class Rot13Handler(EventHandlerBase):
-    def handle_event(self, anchor, data_json):
-        data_json['data'] = codecs.encode(data_json['data'], 'rot13')
-        return data_json
-
-
-class ChangeCaseHandler(EventHandlerBase):
-    def handle_event(self, anchor, data_json):
-        data_json['data'] = data_json['data'].upper() if data_json['data'].islower() else data_json['data'].lower()
-        return data_json
-
-
-class ReverseHandler(EventHandlerBase):
-    def handle_event(self, anchor, data_json):
-        data_json['data'] = data_json['data'][::-1]
-        return data_json
-
-
-class LoginHandler(EventHandlerBase):
-    def handle_event(self, anchor, data_json):
-        email, password = data_json['data']['email'], data_json['data']['password']
-        try:
-            sql_statement = source_code.find_local_variable_value(authorize_login, 'sql_statement')
-            yield (
-                'anchor_logger',
-                'The SQL statement executed by the server will look like this:\n `{}`'.format(sql_statement)
-            )
-
-            yield ('anchor_webide',
-                   login_component_py_response(content=source_code.get_source_code(authorize_login, strip_comments=False)))
-
-            sql_statement_with_values = sql_statement.format(email, password)
-            yield (
-                'anchor_logger',
-                'After the submitted parameters are substituted it looks like this:\n `{}`'.format(
-                    sql_statement_with_values
-                )
-            )
-
-            logged_in_email, is_admin = authorize_login(email, password)
-
-            yield (
-                'anchor_logger',
-                'After the query is executed, it returns _{}_ as email address, and _{}_ for is_admin'.format(
-                    logged_in_email, is_admin
-                )
-            )
-
-            if logged_in_email is not None:
-                response = 'Logged in as _{}_. You __{}have__ admin privileges.'.format(
-                    logged_in_email,
-                    '' if is_admin else 'don\'t '
-                )
-            else:
-                response = 'Bad username/password!'
-        except sqlite3.Warning:
-            response = 'Invalid request!'
-
-        yield ('anchor_login', '# Login page\n' + response)
-
 
 if __name__ == '__main__':
-    anchor_a = ChangeCaseHandler('anchor_a')
-    anchor_b = Rot13Handler('anchor_b')
-    anchor_c = ReverseHandler('anchor_c')
     anchor_webide = SourceCodeEventHandler('anchor_webide', 'login_component.py', 'login')
     anchor_terminado = TerminadoEventHandler('anchor_terminado', 'terminado')
     IOLoop.instance().start()
-

src/event_handlers/stateful_event_handler.py

@@ -1,43 +0,0 @@
-import json
-
-from event_handler_base import EventHandlerBase
-
-
-class StatefulEventHandler(EventHandlerBase):
-    def __init__(self, anchor, event_handler_function):
-        super().__init__(anchor)
-        self.event_handler_function = event_handler_function
-        self.generator = None
-        self.subscribe('reset')
-
-        def event_handler_callback(msg_parts):
-            anchor, message = msg_parts
-            if anchor == b'reset':
-                self.reset()
-                return
-            data_json = json.loads(message)
-            if self.generator is None:
-                self.generator = self.event_handler_function(data_json)
-            try:
-                response_anchor, response_data = next(self.generator)
-            except StopIteration:
-                self.reset()
-                return
-            self.subscribe(response_anchor)
-            response_data = json.dumps({
-                'anchor': response_anchor,
-                'data': response_data,
-            })
-            response = [r.encode('utf-8') for r in (response_anchor, response_data)]
-            self.server_connector.send(*response)
-
-        self.server_connector.register_callback(event_handler_callback)
-
-    def unsubscribe_all(self):
-        super().unsubscribe_all()
-        self.subscribe('reset')
-
-    def reset(self):
-        self.generator = None
-        self.unsubscribe_all()
-        self.subscribe(self.anchor)