Changed the PeriodChooser utility from abstract to real, and replaced the various trivial subclasses with the get_url callable as the parameter.

src/accounting/report/reports/balance_sheet.py

@@ -31,7 +31,7 @@ from .utils.base_page_params import BasePageParams
 from .utils.base_report import BaseReport
 from .utils.csv_export import BaseCSVRow, csv_download, period_spec
 from .utils.option_link import OptionLink
-from .utils.period_choosers import BalanceSheetPeriodChooser
+from .utils.period_choosers import PeriodChooser
 from .utils.report_chooser import ReportChooser
 from .utils.report_type import ReportType
 from .utils.urls import ledger_url, balance_sheet_url, income_statement_url
@@ -317,8 +317,8 @@ class PageParams(BasePageParams):
         """The liabilities."""
         self.owner_s_equity: Section = owner_s_equity
         """The owner's equity."""
-        self.period_chooser: BalanceSheetPeriodChooser \
+        self.period_chooser: PeriodChooser = PeriodChooser(
-            = BalanceSheetPeriodChooser(currency)
+            lambda x: balance_sheet_url(currency, x))
         """The period chooser."""
 
     @property

src/accounting/report/reports/income_expenses.py

@@ -34,7 +34,7 @@ from .utils.base_page_params import BasePageParams
 from .utils.base_report import BaseReport
 from .utils.csv_export import BaseCSVRow, csv_download, period_spec
 from .utils.option_link import OptionLink
-from .utils.period_choosers import IncomeExpensesPeriodChooser
+from .utils.period_choosers import PeriodChooser
 from .utils.report_chooser import ReportChooser
 from .utils.report_type import ReportType
 from .utils.urls import income_expenses_url
@@ -289,8 +289,8 @@ class PageParams(BasePageParams):
         """The report entries."""
         self.total: ReportEntry | None = total
         """The total entry."""
-        self.period_chooser: IncomeExpensesPeriodChooser \
+        self.period_chooser: PeriodChooser = PeriodChooser(
-            = IncomeExpensesPeriodChooser(currency, account)
+            lambda x: income_expenses_url(currency, account, x))
         """The period chooser."""
 
     @property

src/accounting/report/reports/income_statement.py

@@ -31,7 +31,7 @@ from .utils.base_page_params import BasePageParams
 from .utils.base_report import BaseReport
 from .utils.csv_export import BaseCSVRow, csv_download, period_spec
 from .utils.option_link import OptionLink
-from .utils.period_choosers import IncomeStatementPeriodChooser
+from .utils.period_choosers import PeriodChooser
 from .utils.report_chooser import ReportChooser
 from .utils.report_type import ReportType
 from .utils.urls import ledger_url, income_statement_url
@@ -160,8 +160,8 @@ class PageParams(BasePageParams):
         """True if there is any data, or False otherwise."""
         self.sections: list[Section] = sections
         """The sections in the income statement."""
-        self.period_chooser: IncomeStatementPeriodChooser \
+        self.period_chooser: PeriodChooser = PeriodChooser(
-            = IncomeStatementPeriodChooser(currency)
+            lambda x: income_statement_url(currency, x))
         """The period chooser."""
 
     @property

src/accounting/report/reports/journal.py

@@ -31,9 +31,10 @@ from accounting.utils.pagination import Pagination
 from .utils.base_page_params import BasePageParams
 from .utils.base_report import BaseReport
 from .utils.csv_export import BaseCSVRow, csv_download, period_spec
-from .utils.period_choosers import JournalPeriodChooser
+from .utils.period_choosers import PeriodChooser
 from .utils.report_chooser import ReportChooser
 from .utils.report_type import ReportType
+from .utils.urls import journal_url
 
 
 class ReportEntry:
@@ -122,8 +123,8 @@ class PageParams(BasePageParams):
         """The pagination."""
         self.entries: list[JournalEntry] = entries
         """The entries."""
-        self.period_chooser: JournalPeriodChooser \
+        self.period_chooser: PeriodChooser = PeriodChooser(
-            = JournalPeriodChooser()
+            lambda x: journal_url(x))
         """The period chooser."""
 
     @property

src/accounting/report/reports/ledger.py

@@ -33,7 +33,7 @@ from .utils.base_page_params import BasePageParams
 from .utils.base_report import BaseReport
 from .utils.csv_export import BaseCSVRow, csv_download, period_spec
 from .utils.option_link import OptionLink
-from .utils.period_choosers import LedgerPeriodChooser
+from .utils.period_choosers import PeriodChooser
 from .utils.report_chooser import ReportChooser
 from .utils.report_type import ReportType
 from .utils.urls import ledger_url
@@ -264,8 +264,8 @@ class PageParams(BasePageParams):
         """The entries."""
         self.total: ReportEntry | None = total
         """The total entry."""
-        self.period_chooser: LedgerPeriodChooser \
+        self.period_chooser: PeriodChooser = PeriodChooser(
-            = LedgerPeriodChooser(currency, account)
+            lambda x: ledger_url(currency, account, x))
         """The period chooser."""
 
     @property

src/accounting/report/reports/trial_balance.py

@@ -30,7 +30,7 @@ from .utils.base_page_params import BasePageParams
 from .utils.base_report import BaseReport
 from .utils.csv_export import BaseCSVRow, csv_download, period_spec
 from .utils.option_link import OptionLink
-from .utils.period_choosers import TrialBalancePeriodChooser
+from .utils.period_choosers import PeriodChooser
 from .utils.report_chooser import ReportChooser
 from .utils.report_type import ReportType
 from .utils.urls import ledger_url, trial_balance_url
@@ -121,8 +121,8 @@ class PageParams(BasePageParams):
         """The accounts in the trial balance."""
         self.total: Total = total
         """The total of the trial balance."""
-        self.period_chooser: TrialBalancePeriodChooser \
+        self.period_chooser: PeriodChooser = PeriodChooser(
-            = TrialBalancePeriodChooser(currency)
+            lambda x: trial_balance_url(currency, x))
         """The period chooser."""
 
     @property

src/accounting/report/reports/utils/period_choosers.py

@@ -20,42 +20,45 @@ This file is largely taken from the NanoParma ERP project, first written in
 2021/9/16 by imacat (imacat@nanoparma.com).
 
 """
-from abc import ABC, abstractmethod
+import typing as t
 from datetime import date
 
-from accounting.models import Currency, Account, Transaction
+from accounting.models import Transaction
-from accounting.report.income_expense_account import IncomeExpensesAccount
 from accounting.report.period import YearPeriod, Period, ThisMonth, \
     LastMonth, SinceLastMonth, ThisYear, LastYear, Today, Yesterday, \
     TemplatePeriod
-from .urls import journal_url, ledger_url, income_expenses_url, \
-    trial_balance_url, income_statement_url, balance_sheet_url
 
 
-class PeriodChooser(ABC):
+class PeriodChooser:
     """The period chooser."""
 
-    def __init__(self):
+    def __init__(self, get_url: t.Callable[[Period], str]):
-        """Constructs a period chooser."""
+        """Constructs a period chooser.
+
+        :param get_url: The callback to return the URL of the current report in
+            a period.
+        """
+        self.__get_url: t.Callable[[Period], str] = get_url
+        """The callback to return the URL of the current report in a period."""
 
         # Shortcut periods
-        self.this_month_url: str = self._url_for(ThisMonth())
+        self.this_month_url: str = get_url(ThisMonth())
         """The URL for this month."""
-        self.last_month_url: str = self._url_for(LastMonth())
+        self.last_month_url: str = get_url(LastMonth())
         """The URL for last month."""
-        self.since_last_month_url: str = self._url_for(SinceLastMonth())
+        self.since_last_month_url: str = get_url(SinceLastMonth())
         """The URL since last mint."""
-        self.this_year_url: str = self._url_for(ThisYear())
+        self.this_year_url: str = get_url(ThisYear())
         """The URL for this year."""
-        self.last_year_url: str = self._url_for(LastYear())
+        self.last_year_url: str = get_url(LastYear())
         """The URL for last year."""
-        self.today_url: str = self._url_for(Today())
+        self.today_url: str = get_url(Today())
         """The URL for today."""
-        self.yesterday_url: str = self._url_for(Yesterday())
+        self.yesterday_url: str = get_url(Yesterday())
         """The URL for yesterday."""
-        self.all_url: str = self._url_for(Period(None, None))
+        self.all_url: str = get_url(Period(None, None))
         """The URL for all period."""
-        self.url_template: str = self._url_for(TemplatePeriod())
+        self.url_template: str = get_url(TemplatePeriod())
         """The URL template."""
 
         first: Transaction | None \
@@ -85,95 +88,10 @@ class PeriodChooser(ABC):
                 self.available_years \
                     = reversed(range(start.year, today.year - 1))
 
-    @abstractmethod
-    def _url_for(self, period: Period) -> str:
-        """Returns the URL for a period.
-
-        :param period: The period.
-        :return: The URL for the period.
-        """
-        pass
-
     def year_url(self, year: int) -> str:
         """Returns the period URL of a year.
 
         :param year: The year
         :return: The period URL of the year.
         """
-        return self._url_for(YearPeriod(year))
+        return self.__get_url(YearPeriod(year))
-
-
-class JournalPeriodChooser(PeriodChooser):
-    """The journal period chooser."""
-
-    def _url_for(self, period: Period) -> str:
-        return journal_url(period)
-
-
-class LedgerPeriodChooser(PeriodChooser):
-    """The ledger period chooser."""
-
-    def __init__(self, currency: Currency, account: Account):
-        """Constructs the ledger period chooser."""
-        self.currency: Currency = currency
-        """The currency."""
-        self.account: Account = account
-        """The account."""
-        super().__init__()
-
-    def _url_for(self, period: Period) -> str:
-        return ledger_url(self.currency, self.account, period)
-
-
-class IncomeExpensesPeriodChooser(PeriodChooser):
-    """The income and expenses log period chooser."""
-
-    def __init__(self, currency: Currency, account: IncomeExpensesAccount):
-        """Constructs the income and expenses log period chooser."""
-        self.currency: Currency = currency
-        """The currency."""
-        self.account: IncomeExpensesAccount = account
-        """The account."""
-        super().__init__()
-
-    def _url_for(self, period: Period) -> str:
-        return income_expenses_url(self.currency, self.account, period)
-
-
-class TrialBalancePeriodChooser(PeriodChooser):
-    """The trial balance period chooser."""
-
-    def __init__(self, currency: Currency):
-        """Constructs the trial balance period chooser."""
-        self.currency: Currency = currency
-        """The currency."""
-        super().__init__()
-
-    def _url_for(self, period: Period) -> str:
-        return trial_balance_url(self.currency, period)
-
-
-class IncomeStatementPeriodChooser(PeriodChooser):
-    """The income statement period chooser."""
-
-    def __init__(self, currency: Currency):
-        """Constructs the income statement period chooser."""
-        self.currency: Currency = currency
-        """The currency."""
-        super().__init__()
-
-    def _url_for(self, period: Period) -> str:
-        return income_statement_url(self.currency, period)
-
-
-class BalanceSheetPeriodChooser(PeriodChooser):
-    """The balance sheet period chooser."""
-
-    def __init__(self, currency: Currency):
-        """Constructs the balance sheet period chooser."""
-        self.currency: Currency = currency
-        """The currency."""
-        super().__init__()
-
-    def _url_for(self, period: Period) -> str:
-        return balance_sheet_url(self.currency, period)