Support cascade deletion

api/s5_pipes.py

@@ -1,4 +1,4 @@
-from .operation import *
+from .database import *
 from .s0_base import *
 
 
@@ -61,7 +61,7 @@ class Pipe(object):
         return { 'type': self.type, 'id': self.id }
 
 
-def set_pipe_cache(name: str, cs: ChangeSet) -> DbChangeSet:
+def set_pipe_cmd(name: str, cs: ChangeSet) -> DbChangeSet:
     old = Pipe(get_pipe(name, cs.operations[0]['id']))
     raw_new = get_pipe(name, cs.operations[0]['id'])
 
@@ -82,10 +82,10 @@ def set_pipe_cache(name: str, cs: ChangeSet) -> DbChangeSet:
 
 
 def set_pipe(name: str, cs: ChangeSet) -> ChangeSet:
-    return execute_command(name, set_pipe_cache(name, cs))
+    return execute_command(name, set_pipe_cmd(name, cs))
 
 
-def add_pipe_cache(name: str, cs: ChangeSet) -> DbChangeSet:
+def add_pipe_cmd(name: str, cs: ChangeSet) -> DbChangeSet:
     new = Pipe(cs.operations[0])
 
     redo_sql = f"insert into _link (id, type) values ({new.f_id}, {new.f_type});"
@@ -101,10 +101,10 @@ def add_pipe_cache(name: str, cs: ChangeSet) -> DbChangeSet:
 
 
 def add_pipe(name: str, cs: ChangeSet) -> ChangeSet:
-    return execute_command(name, add_pipe_cache(name, cs))
+    return execute_command(name, add_pipe_cmd(name, cs))
 
 
-def delete_pipe_cache(name: str, cs: ChangeSet) -> DbChangeSet:
+def delete_pipe_cmd(name: str, cs: ChangeSet) -> DbChangeSet:
     old = Pipe(get_pipe(name, cs.operations[0]['id']))
 
     redo_sql = f"delete from pipes where id = {old.f_id};"
@@ -120,7 +120,7 @@ def delete_pipe_cache(name: str, cs: ChangeSet) -> DbChangeSet:
 
 
 def delete_pipe(name: str, cs: ChangeSet) -> ChangeSet:
-    return execute_command(name, delete_pipe_cache(name, cs))
+    return execute_command(name, delete_pipe_cmd(name, cs))
 
 
 class InpPipe:
@@ -169,3 +169,13 @@ def inp_out_pipe(name: str) -> list[str]:
         desc = ';'
         lines.append(f'{id} {node1} {node2} {length} {diameter} {roughness} {minor_loss} {status} {desc}')
     return lines
+
+
+'''def delete_pipe_by_node(name: str, node: str) -> ChangeSet:
+    cs = ChangeSet()
+
+    rows = read_all(name, f"select id from pipes where node1 = '{node}' or node2 = '{node}'")
+    for row in rows:
+        cs.append(g_delete_prefix | {'type': 'pipe', 'id': row['id']})
+
+    return cs'''