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import multiprocessing
from asyncio import (Lock, get_event_loop, new_event_loop,
set_event_loop, sleep)
from importlib.util import module_from_spec, spec_from_file_location
from json import dumps, load, loads
from logging import getLogger
from traceback import format_exc
from os import path, environ
from signal import SIGINT, signal
from sys import exit, path as syspath
from typing import Any, Dict
from .localsocket import LocalSocket
from .localplatform import setgid, setuid, get_username, get_home_path
from .customtypes import UserType
from . import helpers
class PluginWrapper:
def __init__(self, file: str, plugin_directory: str, plugin_path: str) -> None:
self.file = file
self.plugin_path = plugin_path
self.plugin_directory = plugin_directory
self.method_call_lock = Lock()
self.socket: LocalSocket = LocalSocket(self._on_new_message)
self.version = None
json = load(open(path.join(plugin_path, plugin_directory, "plugin.json"), "r", encoding="utf-8"))
if path.isfile(path.join(plugin_path, plugin_directory, "package.json")):
package_json = load(open(path.join(plugin_path, plugin_directory, "package.json"), "r", encoding="utf-8"))
self.version = package_json["version"]
self.legacy = False
self.main_view_html = json["main_view_html"] if "main_view_html" in json else ""
self.tile_view_html = json["tile_view_html"] if "tile_view_html" in json else ""
self.legacy = self.main_view_html or self.tile_view_html
self.name = json["name"]
self.author = json["author"]
self.flags = json["flags"]
self.log = getLogger("plugin")
self.passive = not path.isfile(self.file)
def __str__(self) -> str:
return self.name
def _init(self):
try:
signal(SIGINT, lambda s, f: exit(0))
set_event_loop(new_event_loop())
if self.passive:
return
setgid(UserType.ROOT if "root" in self.flags else UserType.HOST_USER)
setuid(UserType.ROOT if "root" in self.flags else UserType.HOST_USER)
# export a bunch of environment variables to help plugin developers
environ["HOME"] = get_home_path(UserType.ROOT if "root" in self.flags else UserType.HOST_USER)
environ["USER"] = "root" if "root" in self.flags else get_username()
environ["DECKY_VERSION"] = helpers.get_loader_version()
environ["DECKY_USER"] = get_username()
environ["DECKY_USER_HOME"] = helpers.get_home_path()
environ["DECKY_HOME"] = helpers.get_homebrew_path()
environ["DECKY_PLUGIN_SETTINGS_DIR"] = path.join(environ["DECKY_HOME"], "settings", self.plugin_directory)
helpers.mkdir_as_user(path.join(environ["DECKY_HOME"], "settings"))
helpers.mkdir_as_user(environ["DECKY_PLUGIN_SETTINGS_DIR"])
environ["DECKY_PLUGIN_RUNTIME_DIR"] = path.join(environ["DECKY_HOME"], "data", self.plugin_directory)
helpers.mkdir_as_user(path.join(environ["DECKY_HOME"], "data"))
helpers.mkdir_as_user(environ["DECKY_PLUGIN_RUNTIME_DIR"])
environ["DECKY_PLUGIN_LOG_DIR"] = path.join(environ["DECKY_HOME"], "logs", self.plugin_directory)
helpers.mkdir_as_user(path.join(environ["DECKY_HOME"], "logs"))
helpers.mkdir_as_user(environ["DECKY_PLUGIN_LOG_DIR"])
environ["DECKY_PLUGIN_DIR"] = path.join(self.plugin_path, self.plugin_directory)
environ["DECKY_PLUGIN_NAME"] = self.name
if self.version:
environ["DECKY_PLUGIN_VERSION"] = self.version
environ["DECKY_PLUGIN_AUTHOR"] = self.author
# append the plugin's `py_modules` to the recognized python paths
syspath.append(path.join(environ["DECKY_PLUGIN_DIR"], "py_modules"))
spec = spec_from_file_location("_", self.file)
assert spec is not None
module = module_from_spec(spec)
assert spec.loader is not None
spec.loader.exec_module(module)
self.Plugin = module.Plugin
if hasattr(self.Plugin, "_migration"):
get_event_loop().run_until_complete(self.Plugin._migration(self.Plugin))
if hasattr(self.Plugin, "_main"):
get_event_loop().create_task(self.Plugin._main(self.Plugin))
get_event_loop().create_task(self.socket.setup_server())
get_event_loop().run_forever()
except:
self.log.error("Failed to start " + self.name + "!\n" + format_exc())
exit(0)
async def _unload(self):
try:
self.log.info("Attempting to unload with plugin " + self.name + "'s \"_unload\" function.\n")
if hasattr(self.Plugin, "_unload"):
await self.Plugin._unload(self.Plugin)
self.log.info("Unloaded " + self.name + "\n")
else:
self.log.info("Could not find \"_unload\" in " + self.name + "'s main.py" + "\n")
except:
self.log.error("Failed to unload " + self.name + "!\n" + format_exc())
exit(0)
async def _on_new_message(self, message : str) -> str|None:
data = loads(message)
if "stop" in data:
self.log.info("Calling Loader unload function.")
await self._unload()
get_event_loop().stop()
while get_event_loop().is_running():
await sleep(0)
get_event_loop().close()
raise Exception("Closing message listener")
# TODO there is definitely a better way to type this
d: Dict[str, Any] = {"res": None, "success": True}
try:
d["res"] = await getattr(self.Plugin, data["method"])(self.Plugin, **data["args"])
except Exception as e:
d["res"] = str(e)
d["success"] = False
finally:
return dumps(d, ensure_ascii=False)
def start(self):
if self.passive:
return self
multiprocessing.Process(target=self._init).start()
return self
def stop(self):
if self.passive:
return
async def _(self: PluginWrapper):
await self.socket.write_single_line(dumps({ "stop": True }, ensure_ascii=False))
await self.socket.close_socket_connection()
get_event_loop().create_task(_(self))
async def execute_method(self, method_name: str, kwargs: Dict[Any, Any]):
if self.passive:
raise RuntimeError("This plugin is passive (aka does not implement main.py)")
async with self.method_call_lock:
# reader, writer =
await self.socket.get_socket_connection()
await self.socket.write_single_line(dumps({ "method": method_name, "args": kwargs }, ensure_ascii=False))
line = await self.socket.read_single_line()
if line != None:
res = loads(line)
if not res["success"]:
raise Exception(res["res"])
return res["res"]
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