From f4950c5033ac821d80c89edb0e46c682ea7f0a2d Mon Sep 17 00:00:00 2001
From: Frederik Jaeckel <frederik.jaeckel@m-ds.de>
Date: Mon, 31 Oct 2022 18:48:20 +0100
Subject: [PATCH] =?UTF-8?q?evaluation=20-=20werte=20f=C3=BCr=20currency+te?=
 =?UTF-8?q?st?=
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---
 evaluation.py        | 41 ++++++++++++++++++++++++++++++++++++++---
 tests/test_report.py |  9 +++++++++
 2 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/evaluation.py b/evaluation.py
index 16077c1..33aa59e 100644
--- a/evaluation.py
+++ b/evaluation.py
@@ -310,7 +310,7 @@ class EvaluationTypeRel(RelFieldsMixin, ModelSQL):
 
     @fields.depends('evaluation', 'eval_currency', 'currency_digits', 'dtype')
     def on_change_with_balance(self, name=None):
-        """ get balanceof bookings in cashbooks by 'type',
+        """ get balance of bookings in cashbooks by 'type',
             converted to currency of evaluation
         """
         pool = Pool()
@@ -389,9 +389,44 @@ class EvaluationCurrencyRel(RelFieldsMixin, ModelSQL):
         if self.currency:
             return self.currency.rec_name
 
+    @fields.depends('evaluation', 'eval_currency', 'currency_digits', 'currency')
     def on_change_with_balance(self, name=None):
-        """ balance of cashbook
+        """ get balance of bookings in cashbooks by 'currency',
+            converted to currency of evaluation
         """
-        return None
+        pool = Pool()
+        Lines = pool.get('cashbook.line')
+        Currency = pool.get('currency.currency')
+        tab_line = Lines.__table__()
+        cursor = Transaction().connection.cursor()
+
+        if (self.evaluation is None) or (self.currency is None) or \
+            (self.eval_currency is None) or (self.currency_digits is None):
+            return None
+
+        lines = Lines.search([
+            ('cashbook.currency.id', '=', self.currency.id),
+            ('cashbook.state', '=', 'open'),
+            ('cashbook.owner.id', '=', Transaction().user),
+            ], query=True)
+
+        query = lines.join(tab_line, condition=lines.id==tab_line.id,
+            ).select(
+                Sum(tab_line.credit - tab_line.debit).as_('balance'),
+            )
+        cursor.execute(*query)
+        balances = cursor.fetchall()
+
+        total_amount = Decimal('0.0')
+        for balance in balances:
+            (bal1,) = balance
+
+            total_amount += Currency.compute(
+                    self.currency,
+                    bal1,
+                    self.eval_currency,
+                )
+        exp = Decimal(Decimal(1) / 10 ** self.currency_digits)
+        return total_amount.quantize(exp)
 
 # end EvaluationCurrencyRel
diff --git a/tests/test_report.py b/tests/test_report.py
index de924a8..d5fceb6 100644
--- a/tests/test_report.py
+++ b/tests/test_report.py
@@ -398,7 +398,16 @@ class ReportTestCase(CashbookTestCase):
             self.assertEqual(evaluation.posted, False)
             self.assertEqual(evaluation.maincolor, 'default')
             self.assertEqual(evaluation.bgcolor, '#ffffc0')
+            self.assertEqual(evaluation.currency.code, 'EUR')
 
             self.assertEqual(len(evaluation.currencies), 2)
+            self.assertEqual(evaluation.currencies[0].code, 'EUR')
+            self.assertEqual(evaluation.currencies[1].code, 'usd')
+
+            self.assertEqual(len(evaluation.currency_values), 2)
+            self.assertEqual(evaluation.currency_values[0].name, 'Euro')
+            self.assertEqual(evaluation.currency_values[0].balance, Decimal('23.0'))
+            self.assertEqual(evaluation.currency_values[1].name, 'usd')
+            self.assertEqual(evaluation.currency_values[1].balance, Decimal('35.71'))
 
 # end ReportTestCase