Add pattern api and test

api/s11_patterns.py

@@ -0,0 +1,44 @@
+from .operation import *
+from .s0_base import *
+
+
+def get_pattern_schema(name: str) -> dict[str, dict[str, Any]]:
+    return { 'id'      : {'type': 'str'        , 'optional': False , 'readonly': True },
+             'factors' : {'type': 'float_list' , 'optional': False , 'readonly': False } }
+
+
+def get_pattern(name: str, id: str) -> dict[str, Any]:
+    pas = read_all(name, f"select * from patterns where id = '{id}'")
+    ps = []
+    for r in pas:
+        ps.append(float(r['factor']))
+    return { 'id': id, 'factors': ps }
+
+
+def set_pattern(name: str, cs: ChangeSet) -> ChangeSet:
+    id = cs.operations[0]['id']
+
+    old = get_pattern(name, id)
+    new = { 'id': id, 'factors': [] }
+
+    f_id = f"'{id}'"
+
+    # TODO: transaction ?
+    redo_sql = f"delete from patterns where id = {f_id};"
+    redo_sql += f"\ndelete from _pattern where id = {f_id};"
+    redo_sql += f"\ninsert into _pattern (id) values ({f_id});"
+    for factor in cs.operations[0]['factors']:
+        f_factor = float(factor)
+        redo_sql += f"\ninsert into patterns (id, factor) values ({f_id}, {f_factor});"
+        new['factors'].append(f_factor)
+
+    undo_sql = f"delete from patterns where id = {f_id};"
+    undo_sql += f"\ndelete from _pattern where id = {f_id};"
+    undo_sql += f"\ninsert into _pattern (id) values ({f_id});"
+    for f_factor in old['factors']:
+        undo_sql += f"\ninsert into patterns (id, factor) values ({f_id}, {f_factor});"
+
+    redo_cs = g_update_prefix | { 'type': 'pattern' } | new
+    undo_cs = g_update_prefix | { 'type': 'pattern' } | old
+
+    return execute_command(name, redo_sql, undo_sql, redo_cs, undo_cs)