[IMP] prepare_locals_dict (#199)

mis_builder/models/mis_report.py

@@ -797,6 +797,17 @@ class MisReport(models.Model):
         aep.done_parsing()
         return aep
 
+    def prepare_locals_dict(self):
+        return {
+            'sum': _sum,
+            'min': _min,
+            'max': _max,
+            'len': len,
+            'avg': _avg,
+            'AccountingNone': AccountingNone,
+            'SimpleArray': SimpleArray,
+        }
+
     @api.multi
     def _fetch_queries(self, date_from, date_to,
                        get_additional_query_filter=None):
@@ -874,7 +885,8 @@ class MisReport(models.Model):
                                    target_move,
                                    subkpis_filter=None,
                                    get_additional_move_line_filter=None,
-                                   get_additional_query_filter=None):
+                                   get_additional_query_filter=None,
+                                   locals_dict=None):
         """ Evaluate a report for a given period, populating a KpiMatrix.
 
         :param kpi_matrix: the KpiMatrix object to be populated created
@@ -892,18 +904,16 @@ class MisReport(models.Model):
                                             query argument and returns a
                                             domain compatible with the query
                                             underlying model
+        :param locals_dict: personalized locals dictionary used as evaluation
+                            context for the KPI expressions
         """
         self.ensure_one()
 
-        locals_dict = {
-            'sum': _sum,
-            'min': _min,
-            'max': _max,
-            'len': len,
-            'avg': _avg,
-            'AccountingNone': AccountingNone,
-            'SimpleArray': SimpleArray,
-        }
+        # prepare the localsdict
+        if locals_dict is None:
+            locals_dict = {}
+
+        locals_dict.update(self.prepare_locals_dict())
 
         # fetch non-accounting queries
         locals_dict.update(self._fetch_queries(