hooks.ledger_entry: Improve date handling.

Check that we have the date field used in the payee line, and not just
'date'.
Allow other date fields to be None since they may not be used by the
template.

import2ledger/hooks/ledger_entry.py

@@ -224,7 +224,7 @@ class AccountSplitter:
 class Template:
     ACCOUNT_SPLIT_RE = re.compile(r'(?:\t|  )\s*')
     DATE_FMT = '%Y/%m/%d'
-    PAYEE_LINE_RE = re.compile(r'\{(\w*_)*date\}')
+    PAYEE_LINE_RE = re.compile(r'^\{(\w*_)*date\}\s')
     SIGNED_CURRENCY_FMT = '¤#,##0.###;¤-#,##0.###'
     UNSIGNED_CURRENCY_FMT = '#,##0.### ¤¤'
 
@@ -234,6 +234,7 @@ class Template:
                  unsigned_currency_fmt=UNSIGNED_CURRENCY_FMT,
                  template_name='<template>'):
         self.date_fmt = date_fmt
+        self.date_field = 'date'
         self.splitter = AccountSplitter(
             signed_currencies, signed_currency_fmt, unsigned_currency_fmt, template_name)
 
@@ -273,7 +274,9 @@ class Template:
             line1 = next(lines)
         except StopIteration:
             return
-        if self.PAYEE_LINE_RE.match(line1):
+        match = self.PAYEE_LINE_RE.match(line1)
+        if match:
+            self.date_field = match.group(0)[1:-2]
             yield '\n' + line1
         else:
             yield '\n{date} {payee}'
@@ -293,16 +296,16 @@ class Template:
         # template_vars must have these keys.  Raise a KeyError if not.
         template_vars['currency']
         template_vars['payee']
-        try:
-            date = template_vars['date']
-        except KeyError:
-            date = datetime.date.today()
+        if template_vars.get(self.date_field) is None:
+            raise errors.UserInputConfigurationError(
+                "entry needs {} field but that's not set by the importer".format(
+                    self.date_field,
+                ), self.splitter.template_name)
         render_vars = {
             'amount': strparse.currency_decimal(template_vars['amount']),
-            'date': date.strftime(self.date_fmt),
         }
         for key, value in template_vars.items():
-            if key.endswith('_date'):
+            if value is not None and (key == 'date' or key.endswith('_date')):
                 render_vars[key] = value.strftime(self.date_fmt)
         all_vars = collections.ChainMap(render_vars, template_vars)
         return ''.join(f(all_vars) for f in self.format_funcs)

setup.py

@@ -30,7 +30,7 @@ REQUIREMENTS['tests_require'] = [
 setup(
     name='import2ledger',
     description="Import different sources of financial data to Ledger",
-    version='0.10.0',
+    version='0.10.1',
     author='Brett Smith',
     author_email='brettcsmith@brettcsmith.org',
     license='GNU AGPLv3+',

tests/test_hook_ledger_entry.py

@@ -182,6 +182,18 @@ def test_line1_not_custom_payee():
         "  Income:Donations  -15.00 USD",
     ]
 
+def test_custom_date_missing():
+    render_vars = template_vars('YY', '20.00')
+    with pytest.raises(errors.UserInputConfigurationError):
+        render_lines(render_vars, 'Custom Payee')
+
+def test_custom_date_is_none():
+    render_vars = template_vars('YZ', '25.00', other_vars={
+        'custom_date': None,
+    })
+    with pytest.raises(errors.UserInputConfigurationError):
+        render_lines(render_vars, 'Custom Payee')
+
 @pytest.mark.parametrize('amount,expect_fee', [
     (40, 3),
     (80, 6),