Orderer/run_client.py

from __future__ import print_function

import sys
import time

import requests
from packaging import version as v

import client_controller
import version
from connection import client_request, host
from debug import debug
from lib.print_exc_plus import print_exc_plus
from routes import client_commands
from util import yn_dialog, main_wrapper


def fake_loading_bar(msg, duration=5.):
    if len(msg) >= 60:
        raise AssertionError('Loading bar label too large')
    msg += ': '
    print(msg, end='')
    sys.stdout.flush()
    bar_length = 79 - len(msg)
    for _ in range(bar_length):
        if not debug:
            time.sleep(duration / bar_length)
        print('#', end='')
        sys.stdout.flush()
    print('\n', end='')
    sys.stdout.flush()


def check_for_updates():
    server_version = client_request('server_version')['version']
    client_version = version.__version__
    if v.parse(server_version) != v.parse(client_version):
        print(f'WARNING: You have Orderer version {client_version} installed while the server is running version {server_version}.')
        print(f'         This may or may not lead to problems.')
        print(f'         A recent client version should be available for download at '
              f'         {host}/orderer.zip')


def load():
    print('Loading...')

    fake_loading_bar('Initializing fake loading bars', duration=5)
    fake_loading_bar('Loading data from disk', duration=1)
    fake_loading_bar('Loading available commands', duration=3.5)
    fake_loading_bar('Checking for updates', duration=0.4)
    try:
        check_for_updates()
    except (ConnectionError, requests.exceptions.ConnectionError):
        print('WARNING: There has been a problem connecting when to the server.')
    fake_loading_bar('Updating indices', duration=2)
    fake_loading_bar('Waiting', duration=5)
    print('Done.\n\n')


def welcome():
    print(r'''
    $$$$$$\                   $$\                                         
    $$  __$$\                 $$ |                                        
    $$ /  $$ | $$$$$$\   $$$$$$$ | $$$$$$\   $$$$$$\   $$$$$$\   $$$$$$\  
    $$ |  $$ |$$  __$$\ $$  __$$ |$$  __$$\ $$  __$$\ $$  __$$\ $$  __$$\ 
    $$ |  $$ |$$ |  \__|$$ /  $$ |$$$$$$$$ |$$ |  \__|$$$$$$$$ |$$ |  \__|
    $$ |  $$ |$$ |      $$ |  $$ |$$   ____|$$ |      $$   ____|$$ |      
     $$$$$$  |$$ |      \$$$$$$$ |\$$$$$$$\ $$ |      \$$$$$$$\ $$ |      
     \______/ \__|       \_______| \_______|\__|       \_______|\__|      
                                                                      
                                                                      
                                                                      
To display an overview of available commands type 'help'.

''')


def one_command():
    try:
        cmd = input('*> ').strip()
    except KeyboardInterrupt:
        if yn_dialog('Do you want to exit Orderer?'):
            print('Then type in `exit` :P')
            return
        else:
            return
    cmds = cmd.split(';')
    for cmd in cmds:
        cmd = cmd.split()
        # cmd = [cmd.strip() for cmd in cmd]
        # noinspection PySimplifyBooleanCheck
        if cmd == []:
            continue
        cmd[0] = cmd[0].lower()
        if cmd[0] not in client_commands:
            print('Invalid command:', cmd[0])
        else:
            method_to_call = getattr(client_controller, cmd[0])
            # noinspection PyBroadException
            try:
                method_to_call(*cmd[1:])
            except TypeError:
                print('Invalid command syntax.')
            except (ConnectionError, requests.exceptions.ConnectionError):
                print('There has been a problem connecting when to the server.')
            except KeyboardInterrupt:
                print('Interrupted')
            except Exception as _:
                if debug:
                    print_exc_plus()
                print('An unknown error occurred while executing a command.')


def main():
    load()
    welcome()
    while not client_controller.exiting:
        one_command()


if debug:
    main = main_wrapper(main)

if __name__ == '__main__':
    main()