Add status api and test

api/__init__.py

@@ -40,4 +40,7 @@ from .s7_valves import get_valve_schema, add_valve, get_valve, set_valve, delete
 
 from .s9_demands import get_demand_schema, get_demand, set_demand
 
+from .s10_status import LINK_STATUS_OPEN, LINK_STATUS_CLOSED, LINK_STATUS_ACTIVE
+from .s10_status import get_status_schema, get_status, set_status
+
 from .s24_coordinates import get_node_coord

api/command.py

@@ -6,6 +6,7 @@ from .s5_pipes import *
 from .s6_pumps import *
 from .s7_valves import *
 from .s9_demands import *
+from .s10_status import *
 
 
 def execute_add_command(name: str, cs: ChangeSet) -> ChangeSet:
@@ -46,6 +47,8 @@ def execute_update_command(name: str, cs: ChangeSet) -> ChangeSet:
         return set_valve(name, cs)
     elif type == 'demand':
         return set_demand(name, cs)
+    elif type == 'status':
+        return set_status(name, cs)
 
     return ChangeSet()
 

api/operation.py

@@ -57,6 +57,12 @@ def read_all(name: str, sql: str) -> list[Row]:
         return cur.fetchall()
 
 
+def try_read(name: str, sql: str) -> Row | None:
+    with conn[name].cursor(row_factory=dict_row) as cur:
+        cur.execute(sql)
+        return cur.fetchone()
+
+
 def write(name: str, sql: str) -> None:
     with conn[name].cursor() as cur:
         cur.execute(sql)

api/s10_status.py

@@ -0,0 +1,64 @@
+from .operation import *
+from .s0_base import *
+
+
+LINK_STATUS_OPEN = 'OPEN'
+LINK_STATUS_CLOSED = 'CLOSED'
+LINK_STATUS_ACTIVE = 'ACTIVE'
+
+
+def get_status_schema(name: str) -> dict[str, dict[str, Any]]:
+    return { 'link'    : {'type': 'str'   , 'optional': False , 'readonly': True },
+             'status'  : {'type': 'str'   , 'optional': True  , 'readonly': False},
+             'setting' : {'type': 'float' , 'optional': True  , 'readonly': False} }
+
+
+def get_status(name: str, link: str) -> dict[str, Any]:
+    s = try_read(name, f"select * from status where link = '{link}'")
+    if s == None:
+        return { 'link': link, 'status': None, 'setting': None }
+    d = {}
+    d['link'] = str(s['link'])
+    d['status'] = str(s['status']) if s['status'] != None else None
+    d['setting'] = float(s['setting']) if s['setting'] != None else None
+    return d
+
+
+class Status(object):
+    def __init__(self, input: dict[str, Any]) -> None:
+        self.type = 'status'
+        self.link = str(input['link'])
+        self.status = str(input['status']) if 'status' in input and input['status'] != None else None
+        self.setting = float(input['setting']) if 'setting' in input and input['setting'] != None else None
+
+        self.f_type = f"'{self.type}'"
+        self.f_link = f"'{self.link}'"
+        self.f_status = f"'{self.status}'" if self.status != None else 'null'
+        self.f_setting = self.setting if self.setting != None else 'null'
+
+    def as_dict(self) -> dict[str, Any]:
+        return { 'type': self.type, 'link': self.link, 'status': self.status, 'setting': self.setting }
+
+
+def set_status(name: str, cs: ChangeSet) -> ChangeSet:
+    old = Status(get_status(name, cs.operations[0]['link']))
+    raw_new = get_status(name, cs.operations[0]['link'])
+
+    new_dict = cs.operations[0]
+    schema = get_status_schema(name)
+    for key, value in schema.items():
+        if key in new_dict and not value['readonly']:
+            raw_new[key] = new_dict[key]
+    new = Status(raw_new)
+
+    redo_sql = f"delete from status where link = {new.f_link};"
+    redo_sql += f"\ninsert into status (link, status, setting) values ({new.f_link}, {new.f_status}, {new.f_setting});"
+
+    undo_sql = f"delete from status where link = {old.f_link};"
+    if old.status != None or old.setting != None:
+        undo_sql += f"\ninsert into status (link, status, setting) values ({old.f_link}, {old.f_status}, {old.f_setting});"
+
+    redo_cs = g_update_prefix | new.as_dict()
+    undo_cs = g_update_prefix | old.as_dict()
+
+    return execute_command(name, redo_sql, undo_sql, redo_cs, undo_cs)