Added the account management.

src/accounting/__init__.py

@@ -18,16 +18,65 @@
 
 """
 import typing as t
+from abc import ABC, abstractmethod
 
+import sqlalchemy as sa
 from flask import Flask, Blueprint
+from flask_sqlalchemy.model import Model
+
+T = t.TypeVar("T", bound=Model)
 
 
-def init_app(app: Flask, url_prefix: str = "/accounting",
+class AbstractUserUtils(t.Generic[T], ABC):
+    """The abstract user utilities."""
+
+    @property
+    @abstractmethod
+    def cls(self) -> t.Type[T]:
+        """Returns the user class.
+
+        :return: The user class.
+        """
+
+    @property
+    @abstractmethod
+    def pk_column(self) -> sa.Column:
+        """Returns the primary key column.
+
+        :return: The primary key column.
+        """
+
+    @property
+    @abstractmethod
+    def current_user(self) -> T:
+        """Returns the current user.
+
+        :return: The current user.
+        """
+
+    @abstractmethod
+    def get_by_username(self, username: str) -> T | None:
+        """Returns the user by her username.
+
+        :return: The user by her username, or None if the user was not found.
+        """
+
+    @abstractmethod
+    def get_pk(self, user: T) -> int:
+        """Returns the primary key of the user.
+
+        :return: The primary key of the user.
+        """
+
+
+def init_app(app: Flask, user_utils: AbstractUserUtils,
+             url_prefix: str = "/accounting",
              can_view_func: t.Callable[[], bool] | None = None,
              can_edit_func: t.Callable[[], bool] | None = None) -> None:
     """Initialize the application.
 
     :param app: The Flask application.
+    :param user_utils: The user utilities.
     :param url_prefix: The URL prefix of the accounting application.
     :param can_view_func: A callback that returns whether the current user can
         view the accounting data.
@@ -38,7 +87,7 @@ def init_app(app: Flask, url_prefix: str = "/accounting",
     # The database instance must be set before loading everything
     # in the application.
     from .database import set_db
-    set_db(app.extensions["sqlalchemy"])
+    set_db(app.extensions["sqlalchemy"], user_utils)
 
     bp: Blueprint = Blueprint("accounting", __name__,
                               url_prefix=url_prefix,
@@ -54,4 +103,7 @@ def init_app(app: Flask, url_prefix: str = "/accounting",
     from . import base_account
     base_account.init_app(app, bp)
 
+    from . import account
+    account.init_app(app, bp)
+
     app.register_blueprint(bp)

src/accounting/account/__init__.py

@@ -0,0 +1,37 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/1/30
+
+#  Copyright (c) 2023 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The account management.
+
+"""
+from flask import Flask, Blueprint
+
+
+def init_app(app: Flask, bp: Blueprint) -> None:
+    """Initialize the application.
+
+    :param bp: The blueprint of the accounting application.
+    :param app: The Flask application.
+    :return: None.
+    """
+    from .converters import AccountConverter
+    app.url_map.converters["account"] = AccountConverter
+
+    from .views import bp as account_bp
+    bp.register_blueprint(account_bp, url_prefix="/accounts")
+
+    from .commands import init_accounts_command
+    app.cli.add_command(init_accounts_command)

src/accounting/account/commands.py

@@ -0,0 +1,128 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/1/30
+
+#  Copyright (c) 2023 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The console commands for the account management.
+
+"""
+import os
+import re
+from secrets import randbelow
+
+import click
+from flask.cli import with_appcontext
+
+from accounting.database import db, user_utils
+from .models import Account, AccountL10n
+from ..base_account import BaseAccount
+
+AccountData = tuple[int, str, int, str, str, str, bool]
+"""The format of the account data, as a list of (ID, base account code, number,
+English, Traditional Chinese, Simplified Chinese, is-offset-needed) tuples."""
+
+
+def __validate_username(ctx: click.core.Context, param: click.core.Option,
+                        value: str) -> str:
+    """Validates the username for the click console command.
+
+    :param ctx: The console command context.
+    :param param: The console command option.
+    :param value: The username.
+    :raise click.BadParameter: When validation fails.
+    :return: The username.
+    """
+    value = value.strip()
+    if value == "":
+        raise click.BadParameter("Username empty.")
+    user: user_utils.cls | None = user_utils.get_by_username(value)
+    if user is None:
+        raise click.BadParameter(f"User {value} does not exist.")
+    return value
+
+
+@click.command("accounting-init-accounts")
+@click.option("-u", "--username", metavar="USERNAME", prompt=True,
+              help="The username.", callback=__validate_username,
+              default=lambda: os.getlogin())
+@with_appcontext
+def init_accounts_command(username: str) -> None:
+    """Initializes the accounts."""
+    creator_pk: int = user_utils.get_pk(user_utils.get_by_username(username))
+
+    bases: list[BaseAccount] = BaseAccount.query\
+        .filter(db.func.length(BaseAccount.code) == 4)\
+        .order_by(BaseAccount.code).all()
+    if len(bases) == 0:
+        click.echo("Please initialize the base accounts with "
+                   "\"flask accounting-init-base\" first.")
+        raise click.Abort
+
+    existing: list[Account] = Account.query.all()
+
+    existing_base_code: set[str] = {x.base_code for x in existing}
+    bases_to_add: list[BaseAccount] = [x for x in bases
+                                       if x.code not in existing_base_code]
+    if len(bases_to_add) == 0:
+        click.echo("No more account to import.")
+        return
+
+    existing_id: set[int] = {x.id for x in existing}
+
+    def get_new_id() -> int:
+        """Returns a new random account ID.
+
+        :return: The newly-generated random account ID.
+        """
+        while True:
+            new_id: int = 100000000 + randbelow(900000000)
+            if new_id not in existing_id:
+                existing_id.add(new_id)
+                return new_id
+
+    data: list[AccountData] = []
+    for base in bases_to_add:
+        l10n: dict[str, str] = {x.locale: x.title for x in base.l10n}
+        is_offset_needed: bool = True if re.match("^[12]1[34]", base.code) \
+            else False
+        data.append((get_new_id(), base.code, 1, base.title_l10n,
+                     l10n["zh_Hant"], l10n["zh_Hans"], is_offset_needed))
+    __add_accounting_accounts(data, creator_pk)
+    click.echo(F"{len(data)} added.  Accounting accounts initialized.")
+
+
+def __add_accounting_accounts(data: list[AccountData], creator_pk: int)\
+        -> None:
+    """Adds the accounts.
+
+    :param data: A list of (base code, number, title) tuples.
+    :param creator_pk: The primary key of the creator.
+    :return: None.
+    """
+    accounts: list[Account] = [Account(id=x[0],
+                                       base_code=x[1],
+                                       no=x[2],
+                                       title_l10n=x[3],
+                                       is_offset_needed=x[6],
+                                       created_by_id=creator_pk,
+                                       updated_by_id=creator_pk)
+                               for x in data]
+    l10n: list[AccountL10n] = [AccountL10n(account_id=x[0],
+                                           locale=y[0],
+                                           title=y[1])
+                               for x in data
+                               for y in (("zh_Hant", x[4]), ("zh_Hans", x[5]))]
+    db.session.bulk_save_objects(accounts)
+    db.session.bulk_save_objects(l10n)
+    db.session.commit()

src/accounting/account/converters.py

@@ -0,0 +1,47 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/1/31
+
+#  Copyright (c) 2023 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The path converters for the account management.
+
+"""
+from flask import abort
+from werkzeug.routing import BaseConverter
+
+from .models import Account
+
+
+class AccountConverter(BaseConverter):
+    """The account converter to convert the account code and to the
+    corresponding account in the routes."""
+
+    def to_python(self, value: str) -> Account:
+        """Converts a username to a user account.
+
+        :param value: The username.
+        :return: The corresponding user account.
+        """
+        account: Account | None = Account.find_by_code(value)
+        if account is None:
+            abort(404)
+        return account
+
+    def to_url(self, value: Account) -> str:
+        """Converts an account to its code.
+
+        :param value: The account.
+        :return: The code.
+        """
+        return value.code

src/accounting/account/forms.py

@@ -0,0 +1,130 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/2/1
+
+#  Copyright (c) 2023 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The forms for the account management.
+
+"""
+import sqlalchemy as sa
+from flask_wtf import FlaskForm
+from wtforms import StringField, BooleanField
+from wtforms.validators import DataRequired, ValidationError
+
+from accounting.base_account import BaseAccount
+from accounting.database import db, user_utils
+from accounting.locale import lazy_gettext
+from accounting.utils.random_id import new_id
+from accounting.utils.strip_text import strip_text
+from .models import Account
+
+
+class BaseAccountExists:
+    """The validator to check if the base account code exists."""
+
+    def __call__(self, form: FlaskForm, field: StringField) -> None:
+        if field.data == "":
+            return
+        if db.session.get(BaseAccount, field.data) is None:
+            raise ValidationError(lazy_gettext(
+                "The base account does not exist."))
+
+
+class AccountForm(FlaskForm):
+    """The form to create or edit an account."""
+    base_code = StringField(
+        filters=[strip_text],
+        validators=[
+            DataRequired(lazy_gettext("Please select the base account.")),
+            BaseAccountExists()])
+    """The code of the base account."""
+    title = StringField(
+        filters=[strip_text],
+        validators=[DataRequired(lazy_gettext("Please fill in the title"))])
+    """The title."""
+    is_offset_needed = BooleanField()
+    """Whether the the entries of this account need offsets."""
+
+    def populate_obj(self, obj: Account) -> None:
+        """Populates the form data into an account object.
+
+        :param obj: The account object.
+        :return: None.
+        """
+        is_new: bool = obj.id is None
+        prev_base_code: str | None = obj.base_code
+        if is_new:
+            obj.id = new_id(Account)
+        obj.base_code = self.base_code.data
+        if prev_base_code != self.base_code.data:
+            last_same_base: Account = Account.query\
+                .filter(Account.base_code == self.base_code.data)\
+                .order_by(Account.base_code.desc()).first()
+            obj.no = 1 if last_same_base is None else last_same_base.no + 1
+        obj.title = self.title.data
+        obj.is_offset_needed = self.is_offset_needed.data
+        if is_new:
+            current_user_pk: int = user_utils.get_pk(user_utils.current_user)
+            obj.created_by_id = current_user_pk
+            obj.updated_by_id = current_user_pk
+        if prev_base_code is not None \
+                and prev_base_code != self.base_code.data:
+            setattr(self, "__post_update",
+                    lambda: sort_accounts_in(prev_base_code, obj.id))
+
+    def post_update(self, obj) -> None:
+        """The post-processing after the update.
+
+        :return: None
+        """
+        current_user_pk: int = user_utils.get_pk(user_utils.current_user)
+        obj.updated_by_id = current_user_pk
+        obj.updated_at = sa.func.now()
+        if hasattr(self, "__post_update"):
+            getattr(self, "__post_update")()
+
+    @property
+    def selected_base(self) -> BaseAccount | None:
+        """The selected base account in the form.
+
+        :return: The selected base account in the form.
+        """
+        return db.session.get(BaseAccount, self.base_code.data)
+
+    @property
+    def base_options(self) -> list[BaseAccount]:
+        """The selectable base accounts.
+
+        :return: The selectable base accounts.
+        """
+        return BaseAccount.query\
+            .filter(sa.func.char_length(BaseAccount.code) == 4)\
+            .order_by(BaseAccount.code).all()
+
+
+def sort_accounts_in(base_code: str, exclude: int) -> None:
+    """Sorts the accounts under a base account after changing the base
+    account or deleting an account.
+
+    :param base_code: The code of the base account.
+    :param exclude: The account ID to exclude.
+    :return: None.
+    """
+    accounts: list[Account] = Account.query\
+        .filter(Account.base_code == base_code,
+                Account.id != exclude)\
+        .order_by(Account.no).all()
+    for i in range(len(accounts)):
+        if accounts[i].no != i + 1:
+            accounts[i].no = i + 1

src/accounting/account/models.py

@@ -0,0 +1,259 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/1/30
+
+#  Copyright (c) 2023 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The data models for the account management.
+
+"""
+import re
+import typing as t
+
+import sqlalchemy as sa
+from flask import current_app
+from flask_babel import get_locale
+from sqlalchemy import text
+
+from accounting.base_account import BaseAccount
+from accounting.database import db, user_utils
+
+user_cls: db.Model = user_utils.cls
+user_pk_column: db.Column = user_utils.pk_column
+
+
+class Account(db.Model):
+    """An account."""
+    __tablename__ = "accounting_accounts"
+    """The table name."""
+    id = db.Column(db.Integer, nullable=False, primary_key=True)
+    """The account ID."""
+    base_code = db.Column(db.String, db.ForeignKey(BaseAccount.code,
+                                                   ondelete="CASCADE"),
+                          nullable=False)
+    """The code of the base account."""
+    base = db.relationship(BaseAccount)
+    """The base account."""
+    no = db.Column(db.Integer, nullable=False, default=text("1"))
+    """The account number under the base account."""
+    title_l10n = db.Column("title", db.String, nullable=False)
+    """The title."""
+    is_offset_needed = db.Column(db.Boolean, nullable=False, default=False)
+    """Whether the entries of this account need offsets."""
+    created_at = db.Column(db.DateTime(timezone=True), nullable=False,
+                           server_default=db.func.now())
+    """The time of creation."""
+    created_by_id = db.Column(db.Integer, db.ForeignKey(user_pk_column),
+                              nullable=False)
+    """The ID of the creator."""
+    created_by = db.relationship(user_cls, foreign_keys=created_by_id)
+    """The creator."""
+    updated_at = db.Column(db.DateTime(timezone=True), nullable=False,
+                           server_default=db.func.now())
+    """The time of last update."""
+    updated_by_id = db.Column(db.Integer, db.ForeignKey(user_pk_column),
+                              nullable=False)
+    """The ID of the updator."""
+    updated_by = db.relationship(user_cls, foreign_keys=updated_by_id)
+    """The updator."""
+    l10n = db.relationship("AccountL10n", back_populates="account",
+                           lazy=False)
+    """The localized titles."""
+    db.UniqueConstraint(base_code, no)
+
+    __CASH = "1111-001"
+    """The code of the cash account,"""
+    __RECEIVABLE = "1141-001"
+    """The code of the receivable account,"""
+    __PAYABLE = "2141-001"
+    """The code of the payable account,"""
+    __ACCUMULATED_CHANGE = "3351-001"
+    """The code of the accumulated-change account,"""
+    __BROUGHT_FORWARD = "3352-001"
+    """The code of the brought-forward account,"""
+    __NET_CHANGE = "3353-001"
+    """The code of the net-change account,"""
+
+    def __str__(self) -> str:
+        """Returns the string representation of this account.
+
+        :return: The string representation of this account.
+        """
+        return F"{self.base_code}-{self.no:03d} {self.title}"
+
+    @property
+    def code(self) -> str:
+        """Returns the code.
+
+        :return: The code.
+        """
+        return F"{self.base_code}-{self.no:03d}"
+
+    @property
+    def title(self) -> str:
+        """Returns the title in the current locale.
+
+        :return: The title in the current locale.
+        """
+        current_locale = str(get_locale())
+        if current_locale == current_app.config["BABEL_DEFAULT_LOCALE"]:
+            return self.title_l10n
+        for l10n in self.l10n:
+            if l10n.locale == current_locale:
+                return l10n.title
+        return self.title_l10n
+
+    @title.setter
+    def title(self, value: str) -> None:
+        """Sets the title in the current locale.
+
+        :param value: The new title.
+        :return: None.
+        """
+        if self.title_l10n is None:
+            self.title_l10n = value
+            return
+        current_locale = str(get_locale())
+        if current_locale == current_app.config["BABEL_DEFAULT_LOCALE"]:
+            self.title_l10n = value
+            return
+        for l10n in self.l10n:
+            if l10n.locale == current_locale:
+                l10n.title = value
+                return
+        self.l10n.append(AccountL10n(
+            locale=current_locale, title=value))
+
+    @classmethod
+    def find_by_code(cls, code: str) -> t.Self | None:
+        """Finds an accounting account by its code.
+
+        :param code: The code.
+        :return: The accounting account, or None if this account does not
+            exist.
+        """
+        m = re.match("^([1-9]{4})-([0-9]{3})$", code)
+        if m is None:
+            return None
+        return cls.query.filter(cls.base_code == m.group(1),
+                                cls.no == int(m.group(2))).first()
+
+    @classmethod
+    def debit(cls) -> list[t.Self]:
+        """Returns the debit accounts.
+
+        :return: The debit accounts.
+        """
+        return cls.query.filter(sa.or_(cls.base_code.startswith("1"),
+                                       cls.base_code.startswith("2"),
+                                       cls.base_code.startswith("3"),
+                                       cls.base_code.startswith("5"),
+                                       cls.base_code.startswith("6"),
+                                       cls.base_code.startswith("75"),
+                                       cls.base_code.startswith("76"),
+                                       cls.base_code.startswith("77"),
+                                       cls.base_code.startswith("78"),
+                                       cls.base_code.startswith("8"),
+                                       cls.base_code.startswith("9")),
+                                cls.base_code != "3351",
+                                cls.base_code != "3353")\
+            .order_by(cls.base_code, cls.no).all()
+
+    @classmethod
+    def credit(cls) -> list[t.Self]:
+        """Returns the debit accounts.
+
+        :return: The debit accounts.
+        """
+        return cls.query.filter(sa.or_(cls.base_code.startswith("1"),
+                                       cls.base_code.startswith("2"),
+                                       cls.base_code.startswith("3"),
+                                       cls.base_code.startswith("4"),
+                                       cls.base_code.startswith("71"),
+                                       cls.base_code.startswith("72"),
+                                       cls.base_code.startswith("73"),
+                                       cls.base_code.startswith("74"),
+                                       cls.base_code.startswith("8"),
+                                       cls.base_code.startswith("9")),
+                                cls.base_code != "3351",
+                                cls.base_code != "3353")\
+            .order_by(cls.base_code, cls.no).all()
+
+    @classmethod
+    def cash(cls) -> t.Self:
+        """Returns the cash account.
+
+        :return: The cash account
+        """
+        return cls.find_by_code(cls.__CASH)
+
+    @classmethod
+    def receivable(cls) -> t.Self:
+        """Returns the receivable account.
+
+        :return: The receivable account
+        """
+        return cls.find_by_code(cls.__RECEIVABLE)
+
+    @classmethod
+    def payable(cls) -> t.Self:
+        """Returns the payable account.
+
+        :return: The payable account
+        """
+        return cls.find_by_code(cls.__PAYABLE)
+
+    @classmethod
+    def accumulated_change(cls) -> t.Self:
+        """Returns the accumulated-change account.
+
+        :return: The accumulated-change account
+        """
+        return cls.find_by_code(cls.__ACCUMULATED_CHANGE)
+
+    @classmethod
+    def brought_forward(cls) -> t.Self:
+        """Returns the brought-forward account.
+
+        :return: The brought-forward account
+        """
+        return cls.find_by_code(cls.__BROUGHT_FORWARD)
+
+    @classmethod
+    def net_change(cls) -> t.Self:
+        """Returns the net-change account.
+
+        :return: The net-change account
+        """
+        return cls.find_by_code(cls.__NET_CHANGE)
+
+    def delete(self) -> None:
+        """Deletes this accounting account.
+
+        :return: None.
+        """
+        AccountL10n.query.filter(AccountL10n.account == self).delete()
+        cls: t.Type[t.Self] = self.__class__
+        cls.query.filter(cls.id == self.id).delete()
+
+
+class AccountL10n(db.Model):
+    """A localized account title."""
+    __tablename__ = "accounting_accounts_l10n"
+    account_id = db.Column(db.Integer, db.ForeignKey(Account.id,
+                                                     ondelete="CASCADE"),
+                           nullable=False, primary_key=True)
+    account = db.relationship(Account, back_populates="l10n")
+    locale = db.Column(db.String, nullable=False, primary_key=True)
+    title = db.Column(db.String, nullable=False)
+    db.UniqueConstraint(account_id, locale)

src/accounting/account/query.py

@@ -0,0 +1,50 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/1/30
+
+#  Copyright (c) 2023 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The account query.
+
+"""
+import sqlalchemy as sa
+from flask import request
+
+from accounting.utils.query import parse_query_keywords
+from .models import Account, AccountL10n
+
+
+def get_account_query() -> list[Account]:
+    """Returns the accounts, optionally filtered by the query.
+
+    :return: The accounts.
+    """
+    keywords: list[str] = parse_query_keywords(request.args.get("q"))
+    if len(keywords) == 0:
+        return Account.query.order_by(Account.base_code, Account.no).all()
+    code: sa.BinaryExpression = Account.base_code + "-" \
+        + sa.func.substr("000" + sa.cast(Account.no, sa.String),
+                         sa.func.char_length(sa.cast(Account.no,
+                                                     sa.String)) + 1)
+    conditions: list[sa.BinaryExpression] = []
+    for k in keywords:
+        l10n: list[AccountL10n] = AccountL10n.query\
+            .filter(AccountL10n.title.contains(k)).all()
+        l10n_matches: set[str] = {x.account_id for x in l10n}
+        conditions.append(sa.or_(Account.base_code.contains(k),
+                                 Account.title_l10n.contains(k),
+                                 code.contains(k),
+                                 Account.id.in_(l10n_matches)))
+
+    return Account.query.filter(*conditions)\
+        .order_by(Account.base_code, Account.no).all()

src/accounting/account/views.py

@@ -0,0 +1,160 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/1/30
+
+#  Copyright (c) 2023 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The views for the account management.
+
+"""
+from urllib.parse import parse_qsl, urlencode
+
+from flask import Blueprint, render_template, session, redirect, flash, \
+    url_for, request
+from werkzeug.datastructures import ImmutableMultiDict
+
+from accounting.database import db
+from accounting.locale import lazy_gettext
+from accounting.utils.pagination import Pagination
+from accounting.utils.permission import can_view, has_permission, can_edit
+from .forms import AccountForm, sort_accounts_in
+from .models import Account
+
+bp: Blueprint = Blueprint("account", __name__)
+"""The view blueprint for the account management."""
+
+
+@bp.get("", endpoint="list")
+@has_permission(can_view)
+def list_accounts() -> str:
+    """Lists the base accounts.
+
+    :return: The account list.
+    """
+    from .models import BaseAccount
+    from .query import get_account_query
+    accounts: list[BaseAccount] = get_account_query()
+    pagination: Pagination = Pagination[BaseAccount](accounts)
+    return render_template("accounting/account/list.html",
+                           list=pagination.list, pagination=pagination)
+
+
+@bp.get("/create", endpoint="create")
+@has_permission(can_edit)
+def show_add_account_form() -> str:
+    """Shows the form to add an account.
+
+    :return: The form to add an account.
+    """
+    if "form" in session:
+        form = AccountForm(ImmutableMultiDict(parse_qsl(session["form"])))
+        del session["form"]
+        form.validate()
+    else:
+        form = AccountForm()
+    return render_template("accounting/account/create.html",
+                           form=form)
+
+
+@bp.post("/store", endpoint="store")
+@has_permission(can_edit)
+def add_account() -> redirect:
+    """Adds an account.
+
+    :return: The redirection to the account detail on success, or the account
+        creation form on error.
+    """
+    form = AccountForm(request.form)
+    if not form.validate():
+        for key in form.errors:
+            for error in form.errors[key]:
+                flash(error, "error")
+        session["form"] = urlencode(list(request.form.items()))
+        return redirect(url_for("accounting.account.create"))
+    account: Account = Account()
+    form.populate_obj(account)
+    db.session.add(account)
+    db.session.commit()
+    flash(lazy_gettext("The account is added successfully"), "success")
+    return redirect(url_for("accounting.account.detail", account=account))
+
+
+@bp.get("/<account:account>", endpoint="detail")
+@has_permission(can_view)
+def show_account_detail(account: Account) -> str:
+    """Shows the account detail.
+
+    :return: The account detail.
+    """
+    return render_template("accounting/account/detail.html", obj=account)
+
+
+@bp.get("/<account:account>/edit", endpoint="edit")
+@has_permission(can_edit)
+def show_account_edit_form(account: Account) -> str:
+    """Shows the form to edit an account.
+
+    :return: The form to edit an account.
+    """
+    form: AccountForm
+    if "form" in session:
+        form = AccountForm(ImmutableMultiDict(parse_qsl(session["form"])))
+        del session["form"]
+        form.validate()
+    else:
+        form = AccountForm(obj=account)
+    return render_template("accounting/account/edit.html",
+                           account=account, form=form)
+
+
+@bp.post("/<account:account>/update", endpoint="update")
+@has_permission(can_edit)
+def update_account(account: Account) -> redirect:
+    """Updates an account.
+
+    :return: The redirection to the account detail on success, or the account
+        edit form on error.
+    """
+    form = AccountForm(request.form)
+    if not form.validate():
+        for key in form.errors:
+            for error in form.errors[key]:
+                flash(error, "error")
+        session["form"] = urlencode(list(request.form.items()))
+        return redirect(url_for("accounting.account.edit", account=account))
+    with db.session.no_autoflush:
+        form.populate_obj(account)
+    if not db.session.is_modified(account):
+        flash(lazy_gettext("The account was not modified."), "success")
+        return redirect(url_for("accounting.account.detail", account=account))
+    form.post_update(account)
+    db.session.commit()
+    flash(lazy_gettext("The account is updated successfully."), "success")
+    return redirect(url_for("accounting.account.detail", account=account))
+
+
+@bp.post("/<account:account>/delete", endpoint="delete")
+@has_permission(can_edit)
+def delete_account(account: Account) -> redirect:
+    """Deletes an account.
+
+    :return: The redirection to the account list on success, or the account
+        detail on error.
+    """
+    for l10n in account.l10n:
+        db.session.delete(l10n)
+    db.session.delete(account)
+    sort_accounts_in(account.base_code, account.id)
+    db.session.commit()
+    flash(lazy_gettext("The account is deleted successfully."), "success")
+    return redirect(url_for("accounting.account.list"))

src/accounting/base_account/__init__.py

@@ -19,6 +19,8 @@
 """
 from flask import Flask, Blueprint
 
+from .models import BaseAccount
+
 
 def init_app(app: Flask, bp: Blueprint) -> None:
     """Initialize the application.

src/accounting/database.py

@@ -22,17 +22,24 @@ initialized at compile time, but as a submodule it is only available at run
 time.
 
 """
+
 from flask_sqlalchemy import SQLAlchemy
 
+from accounting import AbstractUserUtils
+
 db: SQLAlchemy
 """The database instance."""
+user_utils: AbstractUserUtils
+"""The user utilities."""
 
 
-def set_db(new_db: SQLAlchemy) -> None:
+def set_db(new_db: SQLAlchemy, new_user_utils: AbstractUserUtils) -> None:
     """Sets the database instance.
 
     :param new_db: The database instance.
+    :param new_user_utils: The user utilities.
     :return: None.
     """
-    global db
+    global db, user_utils
     db = new_db
+    user_utils = new_user_utils

src/accounting/static/css/style.css

@@ -0,0 +1,96 @@
+/* The Mia! Accounting Flask Project
+ * style.css: The style sheet for the accounting application.
+ */
+
+/*  Copyright (c) 2023 imacat.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+/* Author: imacat@mail.imacat.idv.tw (imacat)
+ * First written: 2023/2/1
+ */
+
+.clickable {
+    cursor: pointer;
+}
+
+/** The account management */
+.account {
+    padding: 2em 1.5em;
+    margin: 1em;
+    background-color: #E9ECEF;
+    border-radius: 0.3em;
+    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
+}
+.account .account-title {
+    font-size: 1.8rem;
+    font-weight: bolder;
+}
+.account .account-code {
+    font-size: 1.4rem;
+    color: #373b3e;
+}
+.list-base-selector {
+    height: 20rem;
+    overflow-y: scroll;
+}
+
+/* The Material Design text field (floating form control in Bootstrap) */
+.material-text-field {
+    position: relative;
+    min-height: calc(3.5rem + 2px);
+    padding-top: 1.625rem;
+}
+.material-text-field > .form-label {
+    position: absolute;
+    top: 0;
+    left: 0;
+    height: calc(3.5rem + 2px);
+    padding: 1rem 0.75rem;
+    transform-origin: 0 0;
+    transition: opacity .1s ease-in-out,transform .1s ease-in-out;
+}
+.material-text-field.not-empty > .form-label {
+    opacity: 0.65;
+    transform: scale(.85) translateY(-.5rem) translateX(.15rem);
+}
+
+/* The Material Design floating action buttons */
+.material-fab {
+    position: fixed;
+    right: 2rem;
+    bottom: 1rem;
+    z-index: 10;
+    flex-direction: column-reverse;
+}
+.material-fab .btn {
+    border-radius: 50%;
+    transform: scale(1.5);
+    box-shadow: 0 3px 5px -1px rgba(0, 0, 0, 0.2), 0 6px 10px 0 rgba(0, 0, 0, 0.14), 0 1px 18px 0 rgba(0,0,0,.12);
+    display: block;
+    margin-top: 2.5rem;
+}
+.material-fab .btn:hover, .material-fab .btn:focus {
+    box-shadow: 0 5px 5px -3px rgba(0, 0, 0, 0.2), 0 8px 10px 1px rgba(0, 0, 0, 0.14), 0 3px 14px 2px rgba(0,0,0,.12);
+}
+
+/* The Material Design form switch */
+@media(max-width:767px) {
+    .form-switch {
+        display: flex;
+        flex-direction: row-reverse;
+        justify-content: space-between;
+        padding-left: 0;
+    }
+}

src/accounting/static/js/account-form.js

@@ -0,0 +1,136 @@
+/* The Mia! Accounting Flask Project
+ * account-form.js: The JavaScript for the account form
+ */
+
+/*  Copyright (c) 2023 imacat.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+/* Author: imacat@mail.imacat.idv.tw (imacat)
+ * First written: 2023/2/1
+ */
+
+// Initializes the page JavaScript.
+document.addEventListener("DOMContentLoaded", function () {
+    initializeBaseAccountSelector()
+    document.getElementById("account-base-code")
+        .onchange = validateBase;
+    document.getElementById("account-title")
+        .onchange = validateTitle;
+    document.getElementById("account-form")
+        .onsubmit = validateForm;
+});
+
+/**
+ * Initializes the base account selector.
+ *
+ * @private
+ */
+function initializeBaseAccountSelector() {
+    const selector = document.getElementById("select-base-modal");
+    const base = document.getElementById("account-base");
+    const baseCode = document.getElementById("account-base-code");
+    const baseContent = document.getElementById("account-base-content");
+    const options = Array.from(document.getElementsByClassName("list-group-item-base"));
+    const btnClear = document.getElementById("btn-clear-base");
+    selector.addEventListener("show.bs.modal", function () {
+        base.classList.add("not-empty");
+        options.forEach(function (item) {
+            item.classList.remove("active");
+        });
+        const selected = document.getElementById("list-group-item-base-" + baseCode.value);
+        if (selected !== null) {
+            selected.classList.add("active");
+        }
+    });
+    selector.addEventListener("hidden.bs.modal", function () {
+        if (baseCode.value === "") {
+            base.classList.remove("not-empty");
+        }
+    });
+    options.forEach(function (option) {
+        option.onclick = function () {
+            baseCode.value = option.dataset.code;
+            baseContent.innerText = option.dataset.content;
+            btnClear.classList.add("btn-danger");
+            btnClear.classList.remove("btn-secondary")
+            btnClear.disabled = false;
+            validateBase();
+            bootstrap.Modal.getInstance(selector).hide();
+        };
+    });
+    btnClear.onclick = function () {
+        baseCode.value = "";
+        baseContent.innerText = "";
+        btnClear.classList.add("btn-secondary")
+        btnClear.classList.remove("btn-danger");
+        btnClear.disabled = true;
+        validateBase();
+        bootstrap.Modal.getInstance(selector).hide();
+    }
+}
+
+/**
+ * Validates the form.
+ *
+ * @returns {boolean} true if valid, or false otherwise
+ * @private
+ */
+function validateForm() {
+    let isValid = true;
+    isValid = validateBase() && isValid;
+    isValid = validateTitle() && isValid;
+    return isValid;
+}
+
+/**
+ * Validates the base account.
+ *
+ * @returns {boolean} true if valid, or false otherwise
+ * @private
+ */
+function validateBase() {
+    const field = document.getElementById("account-base-code");
+    const error = document.getElementById("account-base-code-error");
+    const displayField = document.getElementById("account-base");
+    field.value = field.value.trim();
+    if (field.value === "") {
+        displayField.classList.add("is-invalid");
+        error.innerText = A_("Please select the base account.");
+        return false;
+    }
+    displayField.classList.remove("is-invalid");
+    error.innerText = "";
+    return true;
+}
+
+/**
+ * Validates the title.
+ *
+ * @returns {boolean} true if valid, or false otherwise
+ * @private
+ */
+function validateTitle() {
+    const field = document.getElementById("account-title");
+    const error = document.getElementById("account-title-error");
+    field.value = field.value.trim();
+    if (field.value === "") {
+        field.classList.add("is-invalid");
+        error.innerText = A_("Please fill in the title.");
+        return false;
+    }
+    field.classList.remove("is-invalid");
+    error.innerText = "";
+    return true;
+}

src/accounting/templates/accounting/account/create.html

@@ -0,0 +1,28 @@
+{#
+The Mia! Accounting Flask Project
+create.html: The account creation form
+
+ Copyright (c) 2023 imacat.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+Author: imacat@mail.imacat.idv.tw (imacat)
+First written: 2023/2/1
+#}
+{% extends "accounting/account/include/form.html" %}
+
+{% block header %}{% block title %}{{ A_("Add a New Account") }}{% endblock %}{% endblock %}
+
+{% block back_url %}{{ request.args.get("next") or url_for("accounting.account.list") }}{% endblock %}
+
+{% block action_url %}{{ url_for("accounting.account.store") }}{% endblock %}

src/accounting/templates/accounting/account/detail.html

@@ -0,0 +1,85 @@
+{#
+The Mia! Accounting Flask Project
+detail.html: The account detail
+
+ Copyright (c) 2023 imacat.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+Author: imacat@mail.imacat.idv.tw (imacat)
+First written: 2023/1/31
+#}
+{% extends "accounting/base.html" %}
+
+{% block header %}{% block title %}{{ obj }}{% endblock %}{% endblock %}
+
+{% block content %}
+
+<div class="btn-group mb-3">
+  <a class="btn btn-primary" href="{{ request.args.get("next") or url_for("accounting.account.list") }}">
+    <i class="fa-solid fa-circle-chevron-left"></i>
+    {{ A_("Back") }}
+  </a>
+  {% if can_edit_accounting() %}
+    <a class="btn btn-primary d-none d-md-inline" href="{{ url_for("accounting.account.edit", account=obj) + ("?next=" + request.args["next"] if "next" in request.args else "") }}">
+      <i class="fa-solid fa-gear"></i>
+      {{ A_("Settings") }}
+    </a>
+    <button class="btn btn-danger" type="button" data-bs-toggle="modal" data-bs-target="#delete-modal">
+      <i class="fa-solid fa-trash"></i>
+      {{ A_("Delete") }}
+    </button>
+  {% endif %}
+</div>
+
+{% if can_edit_accounting() %}
+  <div class="d-md-none material-fab">
+    <a class="btn btn-primary" href="{{ url_for("accounting.account.edit", account=obj) + ("?next=" + request.args["next"] if "next" in request.args else "") }}">
+      <i class="fa-solid fa-pen-to-square"></i>
+    </a>
+  </div>
+{% endif %}
+
+{% if can_edit_accounting() %}
+  <form id="delete-form" action="{{ url_for("accounting.account.delete", account=obj) }}" method="post">
+    <input id="csrf_token" type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+    <div class="modal fade" id="delete-modal" tabindex="-1" aria-labelledby="delete-model-label" aria-hidden="true">
+      <div class="modal-dialog">
+        <div class="modal-content">
+          <div class="modal-header">
+            <h1 class="modal-title fs-5" id="delete-model-label">{{ A_("Delete Account Confirmation") }}</h1>
+            <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+          </div>
+          <div class="modal-body">
+            {{ A_("Do you really want to delete this account?") }}
+          </div>
+          <div class="modal-footer">
+            <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">{{ A_("Cancel") }}</button>
+            <button type="submit" class="btn btn-danger">{{ A_("Confirm") }}</button>
+          </div>
+        </div>
+      </div>
+    </div>
+  </form>
+{% endif %}
+
+<div class="account col-sm-6">
+  <div class="account-title">{{ obj.title }}</div>
+  <div class="account-code">{{ obj.code }}</div>
+  <div class="small text-secondary fst-italic">
+    <div>{{ A_("Created") }} {{ obj.created_at }} {{ obj.created_by }}</div>
+    <div>{{ A_("Updated") }} {{ obj.updated_at }} {{ obj.updated_by }}</div>
+  </div>
+</div>
+
+{% endblock %}

src/accounting/templates/accounting/account/edit.html

@@ -0,0 +1,28 @@
+{#
+The Mia! Accounting Flask Project
+edit.html: The account edit form
+
+ Copyright (c) 2023 imacat.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+Author: imacat@mail.imacat.idv.tw (imacat)
+First written: 2023/2/1
+#}
+{% extends "accounting/account/include/form.html" %}
+
+{% block header %}{% block title %}{{ A_("%(account)s Settings", account=account) }}{% endblock %}{% endblock %}
+
+{% block back_url %}{{ url_for("accounting.account.detail", account=account) + ("?next=" + request.args["next"] if "next" in request.args else "") }}{% endblock %}
+
+{% block action_url %}{{ url_for("accounting.account.update", account=account) }}{% endblock %}

src/accounting/templates/accounting/account/include/form.html

@@ -0,0 +1,115 @@
+{#
+The Mia! Accounting Flask Project
+form.html: The account form
+
+ Copyright (c) 2023 imacat.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+Author: imacat@mail.imacat.idv.tw (imacat)
+First written: 2023/2/1
+#}
+{% extends "accounting/base.html" %}
+
+{% block accounting_scripts %}
+  <script src="{{ url_for("accounting.static", filename="js/account-form.js") }}"></script>
+{% endblock %}
+
+{% block content %}
+
+<div class="btn-group btn-actions mb-3">
+  <a class="btn btn-primary" role="button" href="{% block back_url %}{% endblock %}">
+    <i class="fa-solid fa-circle-chevron-left"></i>
+    {{ A_("Back") }}
+  </a>
+</div>
+
+<form id="account-form" action="{% block action_url %}{% endblock %}" method="post">
+  {{ form.csrf_token }}
+  {% if "next" in request.args %}
+    <input type="hidden" name="next" value="{{ request.args["next"] }}">
+  {% endif %}
+  <div class="form-floating mb-3">
+    <input id="account-base-code" type="hidden" name="base_code" value="{{ "" if form.base_code.data is none else form.base_code.data }}">
+    <div id="account-base" class="form-control clickable material-text-field {% if form.base_code.data %} not-empty {% endif %} {% if form.base_code.errors %} is-invalid {% endif %}" data-bs-toggle="modal" data-bs-target="#select-base-modal">
+      <label id="account-base-label" class="form-label" for="account-base">{{ A_("Base account") }}</label>
+      <div id="account-base-content">
+        {% if form.base_code.data %}
+          {% if form.base_code.errors %}
+            {{ A_("(Unknown)") }}
+          {% else %}
+            {{ form.selected_base }}
+          {% endif %}
+        {% endif %}
+      </div>
+    </div>
+    <div id="account-base-code-error" class="invalid-feedback">{% if form.base_code.errors %}{{ form.base_code.errors[0] }}{% endif %}</div>
+  </div>
+
+  <div class="form-floating mb-3">
+    <input id="account-title" class="form-control {% if form.title.errors %} is-invalid {% endif %}" type="text" name="title" value="{{ "" if form.title.data is none else form.title.data }}" placeholder=" " required="required">
+    <label class="form-label" for="account-title">{{ A_("Title") }}</label>
+    <div id="account-title-error" class="invalid-feedback">{% if form.title.errors %}{{ form.title.errors[0] }}{% endif %}</div>
+  </div>
+
+  <div class="d-none d-md-block">
+    <button class="btn btn-primary" type="submit">
+      <i class="fa-solid fa-floppy-disk"></i>
+      {{ A_("Save") }}
+    </button>
+  </div>
+
+  <div class="d-md-none material-fab">
+    <button class="btn btn-primary" type="submit">
+      <i class="fa-solid fa-floppy-disk"></i>
+    </button>
+  </div>
+</form>
+
+<div class="modal fade" id="select-base-modal" tabindex="-1" aria-labelledby="select-base-model-label" aria-hidden="true">
+  <div class="modal-dialog">
+    <div class="modal-content">
+      <div class="modal-header">
+        <h1 class="modal-title fs-5" id="base-selector-model-label">{{ A_("Select Base Account") }}</h1>
+        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+      </div>
+      <div class="modal-body">
+        <div class="input-group mb-2">
+          <input id="select-base-query" class="form-control form-control-sm" type="search" placeholder=" " required="required" aria-label="Search">
+          <label class="input-group-text" for="select-base-query">
+            <i class="fa-solid fa-magnifying-glass"></i>
+            {{ A_("Search") }}
+          </label>
+        </div>
+
+        <ul class="list-group list-base-selector">
+          {% for base in form.base_options %}
+          <li id="list-group-item-base-{{ base.code }}" class="list-group-item list-group-item-base clickable" data-code="{{ base.code }}" data-content="{{ base }}">
+            {{ base }}
+          </li>
+          {% endfor %}
+        </ul>
+      </div>
+      <div class="modal-footer">
+        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">{{ A_("Cancel") }}</button>
+        {% if form.base_code.data %}
+          <button id="btn-clear-base" type="button" class="btn btn-danger">{{ A_("Clear") }}</button>
+        {% else %}
+          <button id="btn-clear-base" type="button" class="btn btn-secondary" disabled="disabled">{{ A_("Clear") }}</button>
+        {% endif %}
+      </div>
+    </div>
+  </div>
+</div>
+
+{% endblock %}

src/accounting/templates/accounting/account/list.html

@@ -0,0 +1,73 @@
+{#
+The Mia! Accounting Flask Project
+list.html: The account list
+
+ Copyright (c) 2023 imacat.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+Author: imacat@mail.imacat.idv.tw (imacat)
+First written: 2023/1/30
+#}
+{% extends "accounting/base.html" %}
+
+{% block header %}{% block title %}{{ A_("Accounts") }}{% endblock %}{% endblock %}
+
+{% block content %}
+
+{% if can_edit_accounting() %}
+  <div class="btn-group mb-3 d-none d-md-block">
+    <a class="btn btn-primary" href="{{ url_for("accounting.account.create") }}">
+      <i class="fa-solid fa-user-plus"></i>
+      {{ A_("New") }}
+    </a>
+  </div>
+
+  <div class="d-md-none material-fab">
+    <a class="btn btn-primary" href="{{ url_for("accounting.account.create") }}">
+      <i class="fa-solid fa-plus"></i>
+    </a>
+  </div>
+{% endif %}
+
+<form action="{{ url_for("accounting.account.list") }}" method="get" role="search">
+  <div class="row">
+    <div class="col-sm-3">
+      <div class="input-group mb-2">
+        <input id="query" class="form-control form-control-sm" type="search" name="q" value="{{ request.args["q"] if "q" in request.args else "" }}" placeholder=" " required="required" aria-label="Search">
+        <button class="input-group-text" type="submit">
+          <label for="query">
+            <i class="fa-solid fa-magnifying-glass"></i>
+            {{ A_("Search") }}
+          </label>
+        </button>
+      </div>
+    </div>
+  </div>
+</form>
+
+{% if list %}
+  {% include "accounting/include/pagination.html" %}
+
+  <div class="list-group">
+  {% for item in list %}
+    <a class="list-group-item list-group-item-action" href="{{ url_for("accounting.account.detail", account=item) }}">
+      {{ item }}
+    </a>
+  {% endfor %}
+  </div>
+{% else %}
+  <p>{{ A_("There is no data.") }}</p>
+{% endif %}
+
+{% endblock %}

src/accounting/templates/accounting/base.html

@@ -21,6 +21,10 @@ First written: 2023/1/27
 #}
 {% extends "base.html" %}
 
+{% block styles %}
+  <link rel="stylesheet" type="text/css" href="{{ url_for("accounting.static", filename="css/style.css") }}">
+{% endblock %}
+
 {% block scripts %}
   <script src="{{ url_for("accounting.babel_catalog") }}"></script>
   {% block accounting_scripts %}{% endblock %}

src/accounting/templates/accounting/include/nav.html

@@ -26,6 +26,12 @@ First written: 2023/1/26
       {{ A_("Accounting") }}
     </span>
     <ul class="dropdown-menu">
+      <li>
+        <a class="dropdown-item {% if request.endpoint.startswith("accounting.account.") %} active {% endif %}" href="{{ url_for("accounting.account.list") }}">
+          <i class="fa-solid fa-list"></i>
+          {{ A_("Accounts") }}
+        </a>
+      </li>
       <li>
         <a class="dropdown-item {% if request.endpoint.startswith("accounting.base-account.") %} active {% endif %}" href="{{ url_for("accounting.base-account.list") }}">
           <i class="fa-solid fa-list"></i>

src/accounting/utils/permission.py

@@ -98,3 +98,4 @@ def init_app(app: Flask, can_view_func: t.Callable[[], bool] | None = None,
     if can_edit_func is not None:
         __can_edit_func = can_edit_func
     app.jinja_env.globals["can_view_accounting"] = __can_view_func
+    app.jinja_env.globals["can_edit_accounting"] = __can_edit_func

src/accounting/utils/random_id.py

@@ -0,0 +1,37 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/1/30
+
+#  Copyright (c) 2023 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The random ID mixin for the data models.
+
+This module should not import any other module from the application.
+
+"""
+import typing as t
+from secrets import randbelow
+
+from accounting.database import db
+
+
+def new_id(cls: t.Type):
+    """Returns a new random ID for the data model.
+
+    :param cls: The data model.
+    :return: The generated new random ID.
+    """
+    while True:
+        new: int = 100000000 + randbelow(900000000)
+        if db.session.get(cls, new) is None:
+            return new

src/accounting/utils/strip_text.py

@@ -0,0 +1,32 @@
+# The Mia! Accounting Flask Project.
+# Author: imacat@mail.imacat.idv.tw (imacat), 2023/2/1
+
+#  Copyright (c) 2023 imacat.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+"""The text stripper for the form fields.
+
+This module should not import any other module from the application.
+
+"""
+
+
+def strip_text(s: str | None) -> str | None:
+    """The filter to strip the leading and trailing white spaces of text.
+
+    :param s: The text input string.
+    :return: The filtered string.
+    """
+    if s is None:
+        return None
+    return s.strip()

tests/testsite/__init__.py

@@ -26,6 +26,7 @@ from flask.cli import with_appcontext
 from flask_babel_js import BabelJS
 from flask_sqlalchemy import SQLAlchemy
 from flask_wtf import CSRFProtect
+from sqlalchemy import Column
 
 bp: Blueprint = Blueprint("home", __name__)
 babel_js: BabelJS = BabelJS()
@@ -51,6 +52,7 @@ def create_app(is_testing: bool = False) -> Flask:
     })
     if is_testing:
         app.config["TESTING"] = True
+    app.config["SQLALCHEMY_ECHO"] = True
 
     babel_js.init_app(app)
     csrf.init_app(app)
@@ -65,11 +67,33 @@ def create_app(is_testing: bool = False) -> Flask:
     from . import auth
     auth.init_app(app)
 
+    class UserUtils(accounting.AbstractUserUtils[auth.User]):
+
+        @property
+        def cls(self) -> t.Type[auth.User]:
+            return auth.User
+
+        @property
+        def pk_column(self) -> Column:
+            return auth.User.id
+
+        @property
+        def current_user(self) -> auth.User:
+            return auth.current_user()
+
+        def get_by_username(self, username: str) -> auth.User | None:
+            return auth.User.query\
+                .filter(auth.User.username == username).first()
+
+        def get_pk(self, user: auth.User) -> int:
+            return user.id
+
     can_view: t.Callable[[], bool] = lambda: auth.current_user() is not None \
         and auth.current_user().username in ["viewer", "editor"]
     can_edit: t.Callable[[], bool] = lambda: auth.current_user() is not None \
         and auth.current_user().username == "editor"
-    accounting.init_app(app, can_view_func=can_view, can_edit_func=can_edit)
+    accounting.init_app(app, user_utils=UserUtils(),
+                        can_view_func=can_view, can_edit_func=can_edit)
 
     return app
 

tests/testsite/auth.py

@@ -35,6 +35,13 @@ class User(db.Model):
     username = db.Column(db.String, nullable=False, unique=True)
     """The username."""
 
+    def __str__(self) -> str:
+        """Returns the string representation of the user.
+
+        :return: The string representation of the user.
+        """
+        return self.username
+
 
 @bp.get("login", endpoint="login-form")
 def show_login_form() -> str: