357 lines
14 KiB
Python
357 lines
14 KiB
Python
# The Mia! Accounting Demonstration Website.
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# Author: imacat@mail.imacat.idv.tw (imacat), 2023/4/13
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# Copyright (c) 2023 imacat.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""The common library for the Mia! Accounting demonstration website.
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"""
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from __future__ import annotations
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import datetime as dt
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from abc import ABC, abstractmethod
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from decimal import Decimal
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from secrets import randbelow
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from typing import Any
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import sqlalchemy as sa
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from flask import Flask
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from . import db
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from .auth import User
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class Accounts:
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"""The shortcuts to the common accounts."""
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CASH: str = "1111-001"
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BANK: str = "1113-001"
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RECEIVABLE: str = "1141-001"
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MACHINERY: str = "1441-001"
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PAYABLE: str = "2141-001"
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SERVICE: str = "4611-001"
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RENT_EXPENSE: str = "6252-001"
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MEAL: str = "6272-001"
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class JournalEntryLineItemData:
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"""The journal entry line item data."""
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def __init__(self, account: str, description: str | None, amount: str,
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original_line_item: JournalEntryLineItemData | None = None):
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"""Constructs the journal entry line item data.
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:param account: The account code.
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:param description: The description.
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:param amount: The amount.
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:param original_line_item: The original journal entry line item.
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"""
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self.journal_entry: JournalEntryData | None = None
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"""The journal entry data."""
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self.id: int = -1
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"""The journal entry line item ID."""
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self.no: int = -1
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"""The line item number under the journal entry and debit or credit."""
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self.original_line_item: JournalEntryLineItemData | None \
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= original_line_item
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"""The original journal entry line item."""
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self.account: str = account
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"""The account code."""
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self.description: str | None = description
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"""The description."""
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self.amount: Decimal = Decimal(amount)
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"""The amount."""
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def form(self, prefix: str, debit_credit: str, index: int,
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is_update: bool) -> dict[str, str]:
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"""Returns the line item as form data.
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:param prefix: The prefix of the form fields.
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:param debit_credit: Either "debit" or "credit".
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:param index: The line item index.
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:param is_update: True for an update operation, or False otherwise
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:return: The form data.
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"""
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prefix = f"{prefix}-{debit_credit}-{index}"
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form: dict[str, str] = {f"{prefix}-account_code": self.account,
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f"{prefix}-description": self.description,
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f"{prefix}-amount": str(self.amount)}
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if is_update and self.id != -1:
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form[f"{prefix}-id"] = str(self.id)
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form[f"{prefix}-no"] = str(index) if self.no == -1 else str(self.no)
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if self.original_line_item is not None:
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assert self.original_line_item.id != -1
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form[f"{prefix}-original_line_item_id"] \
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= str(self.original_line_item.id)
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return form
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class JournalEntryCurrencyData:
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"""The journal entry currency data."""
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def __init__(self, currency: str, debit: list[JournalEntryLineItemData],
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credit: list[JournalEntryLineItemData]):
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"""Constructs the journal entry currency data.
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:param currency: The currency code.
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:param debit: The debit line items.
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:param credit: The credit line items.
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"""
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self.code: str = currency
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"""The currency code."""
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self.debit: list[JournalEntryLineItemData] = debit
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"""The debit line items."""
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self.credit: list[JournalEntryLineItemData] = credit
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"""The credit line items."""
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def form(self, index: int, is_update: bool) -> dict[str, str]:
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"""Returns the currency as form data.
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:param index: The currency index.
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:param is_update: True for an update operation, or False otherwise
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:return: The form data.
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"""
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prefix: str = f"currency-{index}"
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form: dict[str, str] = {f"{prefix}-code": self.code}
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for i in range(len(self.debit)):
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form.update(self.debit[i].form(prefix, "debit", i + 1, is_update))
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for i in range(len(self.credit)):
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form.update(self.credit[i].form(prefix, "credit", i + 1,
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is_update))
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return form
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class JournalEntryData:
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"""The journal entry data."""
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def __init__(self, days: int, currencies: list[JournalEntryCurrencyData]):
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"""Constructs a journal entry.
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:param days: The number of days before today.
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:param currencies: The journal entry currency data.
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"""
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self.id: int = -1
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"""The journal entry ID."""
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self.days: int = days
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"""The number of days before today."""
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self.currencies: list[JournalEntryCurrencyData] = currencies
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"""The journal entry currency data."""
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self.note: str | None = None
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"""The note."""
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for currency in self.currencies:
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for line_item in currency.debit:
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line_item.journal_entry = self
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for line_item in currency.credit:
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line_item.journal_entry = self
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def new_form(self, csrf_token: str, encoded_next_uri: str) \
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-> dict[str, str]:
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"""Returns the journal entry as a creation form.
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:param csrf_token: The CSRF token.
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:param encoded_next_uri: The encoded next URI.
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:return: The journal entry as a creation form.
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"""
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return self.__form(csrf_token, encoded_next_uri, is_update=False)
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def update_form(self, csrf_token: str, encoded_next_uri: str) \
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-> dict[str, str]:
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"""Returns the journal entry as an update form.
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:param csrf_token: The CSRF token.
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:param encoded_next_uri: The encoded next URI.
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:return: The journal entry as an update form.
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"""
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return self.__form(csrf_token, encoded_next_uri, is_update=True)
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def __form(self, csrf_token: str, encoded_next_uri: str,
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is_update: bool = False) -> dict[str, str]:
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"""Returns the journal entry as a form.
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:param csrf_token: The CSRF token.
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:param encoded_next_uri: The encoded next URI.
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:param is_update: True for an update operation, or False otherwise
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:return: The journal entry as a form.
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"""
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date: dt.date = dt.date.today() - dt.timedelta(days=self.days)
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form: dict[str, str] = {"csrf_token": csrf_token,
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"next": encoded_next_uri,
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"date": date.isoformat()}
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for i in range(len(self.currencies)):
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form.update(self.currencies[i].form(i + 1, is_update))
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if self.note is not None:
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form["note"] = self.note
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return form
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class BaseTestData(ABC):
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"""The base test data."""
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def __init__(self, app: Flask, username: str):
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"""Constructs the test data.
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:param app: The Flask application.
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:param username: The username.
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"""
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self._app: Flask = app
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"""The Flask application."""
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with self._app.app_context():
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current_user: User | None = User.query\
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.filter(User.username == username).first()
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assert current_user is not None
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self.__current_user_id: int = current_user.id
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"""The current user ID."""
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self.__journal_entries: list[dict[str, Any]] = []
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"""The data of the journal entries."""
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self.__line_items: list[dict[str, Any]] = []
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"""The data of the journal entry line items."""
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self._init_data()
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@abstractmethod
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def _init_data(self) -> None:
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"""Initializes the test data.
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:return: None
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"""
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def populate(self) -> None:
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"""Populates the data into the database.
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:return: None
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"""
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from accounting.models import JournalEntry, JournalEntryLineItem
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with self._app.app_context():
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db.session.execute(sa.insert(JournalEntry), self.__journal_entries)
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db.session.execute(sa.insert(JournalEntryLineItem),
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self.__line_items)
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db.session.commit()
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@staticmethod
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def _couple(description: str, amount: str, debit: str, credit: str) \
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-> tuple[JournalEntryLineItemData, JournalEntryLineItemData]:
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"""Returns a couple of debit-credit line items.
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:param description: The description.
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:param amount: The amount.
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:param debit: The debit account code.
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:param credit: The credit account code.
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:return: The debit line item and credit line item.
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"""
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return JournalEntryLineItemData(debit, description, amount),\
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JournalEntryLineItemData(credit, description, amount)
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def _add_journal_entry(self, journal_entry_data: JournalEntryData) -> None:
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"""Adds a journal entry.
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:param journal_entry_data: The journal entry data.
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:return: None.
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"""
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from accounting.models import Account
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existing_j_id: set[int] = {x["id"] for x in self.__journal_entries}
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existing_l_id: set[int] = {x["id"] for x in self.__line_items}
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journal_entry_data.id = self.__new_id(existing_j_id)
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date: dt.date \
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= dt.date.today() - dt.timedelta(days=journal_entry_data.days)
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self.__journal_entries.append(
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{"id": journal_entry_data.id,
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"date": date,
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"no": self.__next_j_no(date),
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"note": journal_entry_data.note,
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"created_by_id": self.__current_user_id,
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"updated_by_id": self.__current_user_id})
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debit_no: int = 0
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credit_no: int = 0
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for currency in journal_entry_data.currencies:
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for line_item in currency.debit:
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account: Account | None \
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= Account.find_by_code(line_item.account)
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assert account is not None
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debit_no = debit_no + 1
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line_item.id = self.__new_id(existing_l_id)
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data: dict[str, Any] \
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= {"id": line_item.id,
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"journal_entry_id": journal_entry_data.id,
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"is_debit": True,
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"no": debit_no,
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"account_id": account.id,
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"currency_code": currency.code,
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"description": line_item.description,
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"amount": line_item.amount}
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if line_item.original_line_item is not None:
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data["original_line_item_id"] \
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= line_item.original_line_item.id
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self.__line_items.append(data)
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for line_item in currency.credit:
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account: Account | None \
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= Account.find_by_code(line_item.account)
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assert account is not None
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credit_no = credit_no + 1
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line_item.id = self.__new_id(existing_l_id)
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data: dict[str, Any] \
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= {"id": line_item.id,
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"journal_entry_id": journal_entry_data.id,
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"is_debit": False,
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"no": credit_no,
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"account_id": account.id,
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"currency_code": currency.code,
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"description": line_item.description,
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"amount": line_item.amount}
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if line_item.original_line_item is not None:
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data["original_line_item_id"] \
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= line_item.original_line_item.id
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self.__line_items.append(data)
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@staticmethod
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def __new_id(existing_id: set[int]) -> int:
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"""Generates and returns a new random unique ID.
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:param existing_id: The existing ID.
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:return: The newly-generated random unique ID.
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"""
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while True:
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obj_id: int = 100000000 + randbelow(900000000)
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if obj_id not in existing_id:
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existing_id.add(obj_id)
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return obj_id
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def __next_j_no(self, date: dt.date) -> int:
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"""Returns the next journal entry number in a day.
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:param date: The journal entry date.
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:return: The next journal entry number.
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"""
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existing: set[int] = {x["no"] for x in self.__journal_entries
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if x["date"] == date}
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return 1 if len(existing) == 0 else max(existing) + 1
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def _add_simple_journal_entry(
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self, days: int, currency: str, description: str, amount: str,
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debit: str, credit: str) \
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-> tuple[JournalEntryLineItemData, JournalEntryLineItemData]:
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"""Adds a simple journal entry.
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:param days: The number of days before today.
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:param currency: The currency code.
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:param description: The description.
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:param amount: The amount.
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:param debit: The debit account code.
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:param credit: The credit account code.
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:return: The debit line item and credit line item.
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"""
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debit_item, credit_item = self._couple(
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description, amount, debit, credit)
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self._add_journal_entry(JournalEntryData(
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days, [JournalEntryCurrencyData(
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currency, [debit_item], [credit_item])]))
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return debit_item, credit_item
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