152 lines
5.8 KiB
Python
152 lines
5.8 KiB
Python
import os
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import psycopg as pg
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from psycopg.rows import dict_row
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from .connection import g_conn_dict as conn
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# no undo/redo
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_server_databases = ['template0', 'template1', 'postgres', 'project']
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def list_project() -> list[str]:
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ps = []
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with pg.connect(conninfo="dbname=postgres host=127.0.0.1", autocommit=True) as conn:
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with conn.cursor(row_factory=dict_row) as cur:
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for p in cur.execute(f"select datname from pg_database where datname <> 'postgres' and datname <> 'template0' and datname <> 'template1' and datname <> 'project'"):
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ps.append(p['datname'])
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return ps
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def have_project(name: str) -> bool:
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with pg.connect(conninfo="dbname=postgres host=127.0.0.1", autocommit=True) as conn:
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with conn.cursor() as cur:
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cur.execute(f"select * from pg_database where datname = '{name}'")
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return cur.rowcount > 0
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def copy_project(source: str, new: str) -> None:
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with pg.connect(conninfo="dbname=postgres host=127.0.0.1", autocommit=True) as conn:
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with conn.cursor() as cur:
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cur.execute(f'create database "{new}" with template = {source}')
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# 2025-02-07, WMH
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# copyproject会把pg中operation这个表的全部内容也加进去，我们实际项目运行一周后operation这个表会变得特别大，导致CopyProject花费的时间很长，CopyProjectEx把operation的在复制时没有一块复制过去，节省时间
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class CopyProjectEx:
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@ staticmethod
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def create_database(connection, new_db):
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with connection.cursor() as cursor:
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cursor.execute(f'create database "{new_db}"')
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connection.commit()
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@staticmethod
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def execute_pg_dump(hostname, source_db, exclude_table_list):
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dump_command_structure = (
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f'pg_dump -h {hostname} -F c -s -f source_db_structure.dump {source_db}'
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)
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os.system(dump_command_structure)
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if exclude_table_list is not None:
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exclude_table = ' '.join(['-T {}'.format(i) for i in exclude_table_list])
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dump_command_db = (
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f'pg_dump -h {hostname} -F c -a {exclude_table} -f source_db.dump {source_db}'
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)
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else:
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dump_command_db = (
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f'pg_dump -h {hostname} -F c -a -f source_db.dump {source_db}'
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)
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os.system(dump_command_db)
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@staticmethod
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def execute_pg_restore(hostname, new_db):
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restore_command_structure = (
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f'pg_restore -h {hostname} -d {new_db} source_db_structure.dump'
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)
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os.system(restore_command_structure)
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restore_command_db = (
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f'pg_restore -h {hostname} -d {new_db} source_db.dump'
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)
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os.system(restore_command_db)
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@staticmethod
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def init_operation_table(connection, excluded_table):
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with connection.cursor() as cursor:
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if 'operation' in excluded_table:
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insert_query \
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= "insert into operation (id, redo, undo, redo_cs, undo_cs) values (0, '', '', '', '')"
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cursor.execute(insert_query)
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if 'current_operation' in excluded_table:
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insert_query \
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= "insert into current_operation (id) values (0)"
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cursor.execute(insert_query)
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if 'restore_operation' in excluded_table:
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insert_query \
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= "insert into restore_operation (id) values (0)"
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cursor.execute(insert_query)
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if 'batch_operation' in excluded_table:
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insert_query \
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= "insert into batch_operation (id, redo, undo, redo_cs, undo_cs) values (0, '', '', '', '')"
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cursor.execute(insert_query)
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if 'operation_table' in excluded_table:
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insert_query \
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= "insert into operation_table (option) values ('operation')"
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cursor.execute(insert_query)
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connection.commit()
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def __call__(self, source: str, new: str, excluded_table: [str] = None) -> None:
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connection = pg.connect(conninfo="dbname=postgres host=127.0.0.1", autocommit=True)
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self.create_database(connection, new)
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self.execute_pg_dump('127.0.0.1', source, excluded_table)
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self.execute_pg_restore('127.0.0.1', new)
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connection = pg.connect(conninfo=f"dbname='{new}' host=127.0.0.1", autocommit=True)
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self.init_operation_table(connection, excluded_table)
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def create_project(name: str) -> None:
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return copy_project('project', name)
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def delete_project(name: str) -> None:
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with pg.connect(conninfo="dbname=postgres host=127.0.0.1", autocommit=True) as conn:
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with conn.cursor() as cur:
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cur.execute(f"select pg_terminate_backend(pid) from pg_stat_activity where datname = '{name}'")
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cur.execute(f'drop database "{name}"')
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def clean_project(excluded: list[str] = []) -> None:
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projects = list_project()
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with pg.connect(conninfo="dbname=postgres host=127.0.0.1", autocommit=True) as conn:
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with conn.cursor(row_factory=dict_row) as cur:
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row = cur.execute(f"select current_database()").fetchone()
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if row != None:
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current_db = row['current_database']
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if current_db in projects:
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projects.remove(current_db)
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for project in projects:
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if project in _server_databases or project in excluded:
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continue
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cur.execute(f"select pg_terminate_backend(pid) from pg_stat_activity where datname = '{project}'")
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cur.execute(f'drop database "{project}"')
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def open_project(name: str) -> None:
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if name not in conn:
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conn[name] = pg.connect(conninfo=f"dbname={name} host=127.0.0.1", autocommit=True)
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def is_project_open(name: str) -> bool:
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return name in conn
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def close_project(name: str) -> None:
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if name in conn:
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conn[name].close()
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del conn[name]
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