Huge refactor to api and add batch api

api/s24_coordinates.py

@@ -1,42 +1,11 @@
-from psycopg.rows import dict_row, Row
-from .connection import g_conn_dict as conn
-from .s0_base import *
-from .operation import *
-from .change_set import ChangeSet
+from .operation import read
 
 
 def _to_client_point(coord: str) -> dict[str, float]:
-    coord = coord.removeprefix('(').removesuffix(')').split(',')
-    return { 'x': float(coord[0]), 'y': float(coord[1]) }
+    xy = coord.removeprefix('(').removesuffix(')').split(',')
+    return { 'x': float(xy[0]), 'y': float(xy[1]) }
 
 
-def get_node_coord(name: str, id: str) -> dict[str, float] | None:
-    with conn[name].cursor(row_factory=dict_row) as cur:
-        cur.execute(f"select * from coordinates where node = '{id}'")
-        row = cur.fetchone()
-        if row == None:
-            return None
-        
-        coord = str(row['coord'])
-        return _to_client_point(coord)
-
-'''
-def set_node_coord(name: str, node_type: str, id: str, x: float, y: float) -> ChangeSet:
-    old = get_node_coord(name, id)
-    if old == None:
-        return ChangeSet()
-
-    old_x, old_y = old['x'], old['y']
-
-    with conn[name].cursor() as cur:
-        sql = f"update coordinates set coord = '({x},{y})' where node = '{id}'"
-        cur.execute(sql)
-
-        redo = sql.replace("'", '"')
-        undo = f'update coordinates set coord = "({old_x},{old_y})" where node = "{id}"'
-        add_operation(name, redo, undo)
-
-    change = ChangeSet()
-    change.update(node_type, id, 'coord')
-    return change
-'''
+def get_node_coord(name: str, id: str) -> dict[str, float]:
+    row = read(name, f"select * from coordinates where node = '{id}'")
+    return _to_client_point(row['coord'])