114 lines
3.6 KiB
Python
114 lines
3.6 KiB
Python
from typing import Any
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from psycopg.rows import Row
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from .s0_base import *
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from .change_set import ChangeSet
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from .s24_coordinates import *
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from .utility import *
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from .schema import *
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schema: dict[str, dict[str, Any]] = { \
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'id' : define_property(str_type, False, True), \
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'node1' : define_property(str_type), \
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'node2' : define_property(str_type)}
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def get_pump_schema(name: str) -> dict[str, dict[str, Any]]:
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return schema
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def _query_pump(name: str, id: str) -> Row | None:
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return read(name, f"select * from pumps where id = '{id}'")
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def _get_pump_node1(name: str, id: str) -> str | None:
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row = _query_pump(name, id)
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return row['node1'] if row != None else None
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def _get_pump_node2(name: str, id: str) -> str | None:
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row = _query_pump(name, id)
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return row['node2'] if row != None else None
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def add_pump(name: str, id: str, node1: str, node2: str) -> ChangeSet:
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if is_pump(name, id):
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return ChangeSet()
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if not is_node(name, node1):
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return ChangeSet()
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if not is_node(name, node2):
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return ChangeSet()
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if node1 == node2:
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return ChangeSet()
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sql = f"insert into _link (id, type) values ('{id}', '{PUMP}');"
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sql += f"\ninsert into pumps (id, node1, node2) values ('{id}', '{node1}', '{node2}');"
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undo = f"delete from pumps where id = ''{id}'';"
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undo += f"\ndelete from _link where id = ''{id}'';"
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write(name, sql)
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add_operation(name, sql.replace("'", "''"), undo, 'add_pump', API_ADD, PUMP, id)
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return get_current_change_set(name)
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def get_pump(name: str, id: str) -> dict[str, Any] | None:
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row = _query_pump(name, id)
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if row == None:
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return None
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ps: dict[str, str] = {}
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ps['id'] = id
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ps['node1'] = row['node1']
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ps['node2'] = row['node2']
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return ps
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def set_pump(name: str, id: str, properties: dict[str, Any]) -> ChangeSet:
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if not is_pump(name, id):
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return ChangeSet()
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if 'node1' in properties:
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if not is_node(name, properties['node1']) or _get_pump_node2(name, id) == properties['node1']:
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return ChangeSet()
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if 'node2' in properties:
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if not is_node(name, properties['node2']) or _get_pump_node1(name, id) == properties['node2']:
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return ChangeSet()
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if 'node1' in properties and 'node2' in properties:
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if properties['node1'] == properties['node2']:
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return ChangeSet()
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old = Serialize(get_pump(name, id), schema).to_storage()
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new = get_pump(name, id)
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ps: list[str] = []
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for key in properties:
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if key in schema and schema[key]['readonly'] == False:
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new[key] = properties[key]
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ps.append(key)
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new = Serialize(new, schema).to_execution()
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sql = f"update pumps set node1 = {new['node1']}, node2 = {new['node2']} where id = '{id}';"
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undo = f"update pumps set node1 = {old['node1']}, node2 = {old['node2']} where id = ''{id}'';"
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write(name, sql)
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add_operation(name, sql.replace("'", "''"), undo, 'set_pump', API_UPDATE, PUMP, id, ps)
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return get_current_change_set(name)
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def delete_pump(name: str, id: str) -> ChangeSet:
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row = get_pump(name, id)
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if row == None:
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return ChangeSet()
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old = Serialize(get_pump(name, id), schema).to_storage()
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sql = f"delete from pumps where id = '{id}';"
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sql += f"\ndelete from _link where id = '{id}';"
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undo = f"insert into _link (id, type) values (''{id}'', ''{PUMP}'');"
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undo += f"\ninsert into pumps (id, node1, node2) values (''{id}'', {old['node1']}, {old['node2']});"
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write(name, sql)
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add_operation(name, sql.replace("'", "''"), undo, 'delete_pump', API_DELETE, PUMP, id)
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return get_current_change_set(name)
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