Code refactor for demand

api/s9_demands.py

@@ -21,7 +21,7 @@ def get_demand(name: str, junction: str) -> dict[str, Any]:
     return { 'junction': junction, 'demands': ds }
 
 
-def set_demand_cache(name: str, cs: ChangeSet) -> BatchSqlChangeSet:
+def set_demand_cache(name: str, cs: ChangeSet) -> DbChangeSet:
     junction = cs.operations[0]['junction']
     old = get_demand(name, junction)
     new = { 'junction': junction, 'demands': [] }
@@ -40,7 +40,6 @@ def set_demand_cache(name: str, cs: ChangeSet) -> BatchSqlChangeSet:
         redo_sql += f"\ninsert into demands (junction, demand, pattern, category) values ({f_junction}, {f_demand}, {f_pattern}, {f_category});"
         new['demands'].append({ 'demand': demand, 'pattern': pattern, 'category': category })
 
-    undo_sql = ''
     _undo_sql = f"delete from demands where junction = {f_junction};"
     for r in old['demands']:
         demand = float(r['demand'])
@@ -56,7 +55,7 @@ def set_demand_cache(name: str, cs: ChangeSet) -> BatchSqlChangeSet:
     undo_cs = []
     undo_cs.append(g_update_prefix | { 'type': 'demand' } | old)
 
-    cache = None | SqlChangeSet
+    cache = None
     if len(cs.operations[0]['demands']) > 0:
         r = cs.operations[0]['demands'][0]
         demand = float(r['demand'])
@@ -65,6 +64,7 @@ def set_demand_cache(name: str, cs: ChangeSet) -> BatchSqlChangeSet:
     else:
         cache = set_junction_cache(name, ChangeSet({'id': junction, 'demand': None, 'pattern': None}))
 
+    undo_sql = ''
     if cache != None:
         redo_sql += '\n'
         redo_sql += cache.redo_sql
@@ -78,12 +78,11 @@ def set_demand_cache(name: str, cs: ChangeSet) -> BatchSqlChangeSet:
         undo_cs.append(cache.undo_cs)
         undo_cs.reverse()
 
-    return BatchSqlChangeSet(redo_sql, undo_sql, redo_cs, undo_cs)
+    return DbChangeSet(redo_sql, undo_sql, redo_cs, undo_cs)
 
 
 def set_demand(name: str, cs: ChangeSet) -> ChangeSet:
-    css = set_demand_cache(name, cs)
-    return execute_batch(name, css.redo_sql, css.undo_sql, css.redo_cs, css.undo_cs)
+    return execute_command(name, set_demand_cache(name, cs))
 
 
 class InpDemand: