From a1ede237404f9300f203cdc7e306d86fa7bbf65f Mon Sep 17 00:00:00 2001
From: Frederik Jaeckel <frederik.jaeckel@m-ds.de>
Date: Tue, 14 Feb 2023 23:03:12 +0100
Subject: [PATCH] add: query for gain/loss

---
 line.py | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 56 insertions(+), 6 deletions(-)

diff --git a/line.py b/line.py
index d1203a2..7990f65 100644
--- a/line.py
+++ b/line.py
@@ -123,12 +123,62 @@ class Line(SecondUomMixin, metaclass=PoolMeta):
             'invisible': Eval('feature', '') != 'asset',
         }, depends=['currency_digits', 'feature']),
         'get_yield_data', searcher='search_asset_dividend')
-    # ~ asset_gainloss = fields.Function(fields.Numeric(string='Profit/Loss',
-        # ~ readonly=True, digits=(16, Eval('currency_digits', 2)),
-        # ~ states = {
-            # ~ 'invisible': Eval('feature', '') != 'asset',
-        # ~ }, depends=['currency_digits', 'feature']),
-        # ~ 'get_yield_data')
+    asset_gainloss = fields.Function(fields.Numeric(string='Profit/Loss',
+        readonly=True, digits=(16, Eval('currency_digits', 2)),
+        states = {
+            'invisible': Eval('feature', '') != 'asset',
+        }, depends=['currency_digits', 'feature']),
+        'get_gainloss_data')
+
+    @classmethod
+    def get_gainloss_data_sql(cls):
+        """ query for gain/loss on sell of shares
+        """
+        pool = Pool()
+        AssetSetting = pool.get('cashbook.assetconf')
+        SplitLine = pool.get('cashbook.split')
+        tab_line = cls.__table__()
+        tab_mv_counterpart1 = cls.__table__()
+        tab_mv_counterpart2 = cls.__table__()
+        tab_mv_spline = SplitLine.__table__()
+
+        cfg1 = AssetSetting.get_singleton()
+
+        tab_assetline = cls.search([
+            ('cashbook.btype.feature', '=', 'asset'),
+            ], query=True)
+
+        query = tab_line.join(tab_assetline,
+                condition=(tab_assetline.id==tab_line.id),
+            ).join(tab_mv_counterpart1,
+                # [MV] transfer booking, select counterpart [1] - a split-booking
+                condition=tab_line.bookingtype.in_(['mvin', 'mvout']) & \
+                    ((tab_line.reference == tab_mv_counterpart1.id) | \
+                     (tab_line.id == tab_mv_counterpart1.reference)) & \
+                    (tab_mv_counterpart1.bookingtype.in_(['spin', 'spout'])),
+                type_ = 'LEFT OUTER',
+            ).join(tab_mv_spline,
+                # [MV] fee-line is linked to split-booking-line of counterpart [1]
+                condition=(tab_mv_spline.line == tab_mv_counterpart1.id) & \
+                    (tab_mv_spline.splittype == 'tr') & \
+                    (tab_mv_spline.booktransf != None) & \
+                    (tab_mv_spline.booktransf == getattr(cfg1.gainloss_book, 'id', None)),
+                type_ = 'LEFT OUTER',
+            ).join(tab_mv_counterpart2,
+                condition=tab_line.bookingtype.in_(['mvin', 'mvout']) & \
+                    ((tab_mv_counterpart2.reference == tab_line.id) | \
+                     (tab_mv_counterpart2.id == tab_line.reference))
+            ).select(
+                tab_line.id,
+                Coalesce(
+                    tab_mv_counterpart2.credit - tab_mv_counterpart2.debit,
+                    Case(
+                        (tab_line.bookingtype == 'spin', tab_mv_spline.amount),
+                        (tab_line.bookingtype == 'spout', tab_mv_spline.amount * Decimal('-1.0')),
+                    ),
+                ).as_('gainloss'),
+            )
+        return (tab_line, query)
 
     @classmethod
     def get_yield_data_sql(cls):