capsul-flask/capsulflask/shared.py

import re

import traceback

from datetime import datetime, timedelta
from flask import current_app
from typing import List

class OnlineHost:
  def __init__(self, id: str, url: str):
    self.id = id
    self.url = url

# I decided to just use dict everywhere instead because I have to use dict to read it from json 
# class SSHHostKey:
#   def __init__(self, key_type=None, content=None, sha256=None):
#     self.key_type = key_type
#     self.content = content
#     self.sha256 = sha256

class VirtualMachine:
  def __init__(self, id, host, ipv4=None, ipv6=None, state="unknown", ssh_host_keys: List[dict] = list()):
    self.id = id
    self.host = host
    self.ipv4 = ipv4
    self.ipv6 = ipv6
    self.state = state
    self.ssh_host_keys = ssh_host_keys

class VirtualizationInterface:
  def capacity_avaliable(self, additional_ram_bytes: int) -> bool:
    pass

  def get(self, id: str) -> VirtualMachine:
    pass

  def get_all_by_id(self) -> dict:
    pass

  def create(self, email: str, id: str, template_image_file_name: str, vcpus: int, memory: int, ssh_authorized_keys: list):
    pass

  def destroy(self, email: str, id: str):
    pass

  def vm_state_command(self, email: str, id: str, command: str):
    pass

  def net_set_dhcp(self, email: str, host_id: str, network_name: str, macs: list, remove_ipv4: str, add_ipv4: str):
    pass


def validate_capsul_id(id):
  if not re.match(r"^(cvm|capsul)-[a-z0-9]{10}$", id):
    raise ValueError(f"vm id \"{id}\" must match \"^capsul-[a-z0-9]{{10}}$\"")

def authorized_as_hub(headers):
  if headers.get('Authorization'):
    auth_header_value = headers.get('Authorization').replace("Bearer ", "")
    return auth_header_value == current_app.config["HUB_TOKEN"]
  return False

def get_account_balance(vms, payments, as_of):

  vm_cost_dollars = 0.0
  for vm in vms:
    vm_months = get_vm_months_float(vm, as_of)
    vm_cost_dollars += vm_months * float(vm["dollars_per_month"])

  payment_dollars_total = float( sum(map(lambda x: 0 if x["invalidated"] else x["dollars"], payments)) )

  return payment_dollars_total - vm_cost_dollars


average_number_of_days_in_a_month = 30.44

def get_vm_months_float(vm, as_of):
  end_datetime = vm["deleted"] if vm["deleted"] else as_of
  days = float((end_datetime - vm["created"]).total_seconds())/float(60*60*24)
  
  # y / m / d
  date_when_minimum_run_time_was_changed_to_one_hour = datetime(2022, 2, 7)

  if vm["created"] >  date_when_minimum_run_time_was_changed_to_one_hour:
    one_hour_in_days = float(1)/float(24)
    if days < one_hour_in_days:
      days = one_hour_in_days
  else:
    if days < 1:
      days = float(1)
  
  return days / average_number_of_days_in_a_month

def btcpay_invoice_is_paid(btcpay_invoice, pending_confirmation_as_paid):
  is_paid = pending_confirmation_as_paid and btcpay_invoice['status'] == "paid"
  is_complete = btcpay_invoice['status'] == "complete"
  is_confirmed = btcpay_invoice['status'] == "confirmed"
  is_paid_late = btcpay_invoice['status'] == "expired" and btcpay_invoice['exceptionStatus'] == "paidLate" 

  return is_paid or is_complete or is_confirmed or is_paid_late

def get_warnings_list():

  delete_at_account_balance_dollars = -10

  return [
    dict(
      id='zero_1w',
      get_active=lambda balance_1w, balance_1d, balance_now: balance_1w  < 0,
      get_subject=lambda _: "Capsul One Week Payment Reminder",
      get_body=lambda base_url, pluralize_capsul: (
        f"{get_warning_headline('zero_1w', pluralize_capsul)}"
        f"Log in now to re-fill your account! {base_url}/console/account-balance\n\n"
        "If you believe you have recieved this message in error, please let us know: support@cyberia.club"
      )
    ),
    dict(
      id='zero_1d',
      get_active=lambda balance_1w, balance_1d, balance_now: balance_1d  < 0,
      get_subject=lambda _: "Capsul One Day Payment Reminder",
      get_body=lambda base_url, pluralize_capsul: (
        f"{get_warning_headline('zero_1d', pluralize_capsul)}"
        f"Log in now to re-fill your account! {base_url}/console/account-balance\n\n"
        "If you believe you have recieved this message in error, please let us know: support@cyberia.club"
      )
    ),
    dict(
      id='zero_now',
      get_active=lambda balance_1w, balance_1d, balance_now: balance_now < 0,
      get_subject=lambda _: "Your Capsul Account is No Longer Funded",
      get_body=lambda base_url, pluralize_capsul: (
        f"{get_warning_headline('zero_now', pluralize_capsul)}"
        f"Log in now to re-fill your account! {base_url}/console/account-balance\n\n"
        f"If you need help decomissioning your Capsul{pluralize_capsul}, "
          "would like to request backups, or de-activate your account, please contact: support@cyberia.club"
      )
    ),
    dict(
      id='delete_1w',
      get_active=lambda balance_1w, balance_1d, balance_now: balance_1w  < delete_at_account_balance_dollars,
      get_subject=lambda pluralize_capsul: f"Your Capsul{pluralize_capsul} Will be Deleted In Less Than a Week",
      get_body=lambda base_url, pluralize_capsul: (
        f"{get_warning_headline('delete_1w', pluralize_capsul)}"
        f"Log in now to re-fill your account! {base_url}/console/account-balance\n\n"
        f"If you need help decomissioning your Capsul{pluralize_capsul}, "
          "would like to request backups, or de-activate your account, please contact: support@cyberia.club"
      ) 
    ),
    dict(
      id='delete_1d',
      get_active=lambda balance_1w, balance_1d, balance_now: balance_1d  < delete_at_account_balance_dollars,
      get_subject=lambda pluralize_capsul: f"Last Chance to Save your Capsul{pluralize_capsul}: Gone Tomorrow",
      get_body=lambda base_url, pluralize_capsul: (
        f"{get_warning_headline('delete_1d', pluralize_capsul)}"
        f"{base_url}/console/account-balance"
      ) 
    ),
    dict(
      id='delete_now',
      get_active=lambda balance_1w, balance_1d, balance_now: balance_now < delete_at_account_balance_dollars,
      get_subject=lambda pluralize_capsul: f"Capsul{pluralize_capsul} Deleted",
      get_body=lambda base_url, pluralize_capsul: (
        f"{get_warning_headline('delete_now', pluralize_capsul)}"
      ) 
    )
  ]

def get_warning_headline(warning_id, pluralize_capsul):
  return dict(
    zero_1w= (
      "According to our calculations, your Capsul account will run out of funds before this time next week.\n\n"
    ),
    zero_1d= (
      "According to our calculations, your Capsul account will run out of funds by this time tomorrow.\n\n"
    ),
    zero_now= (
        f"You have run out of funds! You will no longer be able to create Capsuls.\n\n"
        f"As a courtesy, we'll let your existing Capsul{pluralize_capsul} keep running until your account "
        "reaches a -$10 balance, at which point they will be deleted.\n\n"  
    ),
    delete_1w= (
        "You have run out of funds and have not refilled your account.\n\n"
        f"As a courtesy, we've let your existing Capsul{pluralize_capsul} keep running. "
        f"However, your account will reach a -$10 balance some time next week and your Capsul{pluralize_capsul} "
        "will be deleted.\n\n"
    ),
    delete_1d= (
        "You have run out of funds and have not refilled your account.\n\n"
        f"As a courtesy, we have let your existing Capsul{pluralize_capsul} keep running. "
        f"However, your account will reach a -$10 balance by this time tomorrow and "
        f"your Capsul{pluralize_capsul} will be deleted.\n\n"
        f"Last chance to deposit funds now and keep your Capsul{pluralize_capsul} running! "
    ),
    delete_now= (
        f"Your account reached a -$10 balance and your Capsul{pluralize_capsul} will be deleted by ops shortly unless we hear from you."
    )
  )[warning_id]

def reset_account_balance_warning(email, model):
  
  vms = model.list_vms_for_account(email)
  payments = model.list_payments_for_account(email)
  balance_1w = get_account_balance(vms, payments, datetime.utcnow() + timedelta(days=7)) 
  balance_1d = get_account_balance(vms, payments, datetime.utcnow() + timedelta(days=1)) 
  balance_now = get_account_balance(vms, payments, datetime.utcnow())

  warnings = get_warnings_list()
  next_warning = 0
  for i in range(0, len(warnings)):
    if warnings[i]['get_active'](balance_1w, balance_1d, balance_now):
      next_warning = i
  
  # inserting a null warning element at the beginning of the list moves the next_warning index back by one element 
  # thats desired because we want to set the warning back to whatever goes before the current warning 
  warnings.insert(0, dict(id=None))

  model.set_account_balance_warning(email, warnings[next_warning]['id'])




def my_exec_info_message(exec_info):
  traceback_result = traceback.format_tb(exec_info[2])
  if isinstance(traceback_result, list):
    traceback_result = "\n".join(traceback_result)
    
  return f"{exec_info[0].__module__}.{exec_info[0].__name__}: {exec_info[1]}: {traceback_result}"