begin adding static types to backend code

9 files changed, 189 insertions, 153 deletions

diff --git a/backend/browser.py b/backend/browser.py
index ce9b3dd7..358c05f9 100644
--- a/backend/browser.py
+++ b/backend/browser.py
@@ -4,53 +4,70 @@ import json
 # from pprint import pformat
 
 # Partial imports
-from aiohttp import ClientSession, web
-from asyncio import get_event_loop, sleep
-from concurrent.futures import ProcessPoolExecutor
+from aiohttp import ClientSession
+from asyncio import sleep
 from hashlib import sha256
 from io import BytesIO
 from logging import getLogger
-from os import R_OK, W_OK, path, rename, listdir, access, mkdir
+from os import R_OK, W_OK, path, listdir, access, mkdir
 from shutil import rmtree
 from time import time
 from zipfile import ZipFile
 from localplatform import chown, chmod
+from enum import IntEnum
+from typing import Dict, List, TypedDict
 
 # Local modules
-from helpers import get_ssl_context, download_remote_binary_to_path
-from injector import get_gamepadui_tab
+from .loader import Loader, Plugins
+from .helpers import get_ssl_context, download_remote_binary_to_path
+from .settings import SettingsManager
+from .injector import get_gamepadui_tab
 
 logger = getLogger("Browser")
 
+class PluginInstallType(IntEnum):
+    INSTALL = 0
+    REINSTALL = 1
+    UPDATE = 2
+
+class PluginInstallRequest(TypedDict):
+    name: str
+    artifact: str
+    version: str
+    hash: str
+    install_type: PluginInstallType
+
 class PluginInstallContext:
-    def __init__(self, artifact, name, version, hash) -> None:
+    def __init__(self, artifact: str, name: str, version: str, hash: str) -> None:
         self.artifact = artifact
         self.name = name
         self.version = version
         self.hash = hash
 
 class PluginBrowser:
-    def __init__(self, plugin_path, plugins, loader, settings) -> None:
+    def __init__(self, plugin_path: str, plugins: Plugins, loader: Loader, settings: SettingsManager) -> None:
         self.plugin_path = plugin_path
         self.plugins = plugins
         self.loader = loader
         self.settings = settings
-        self.install_requests = {}
+        self.install_requests: Dict[str, PluginInstallContext | List[PluginInstallContext]] = {}
 
-    def _unzip_to_plugin_dir(self, zip, name, hash):
+    def _unzip_to_plugin_dir(self, zip: BytesIO, name: str, hash: str):
         zip_hash = sha256(zip.getbuffer()).hexdigest()
         if hash and (zip_hash != hash):
             return False
         zip_file = ZipFile(zip)
         zip_file.extractall(self.plugin_path)
-        plugin_dir = path.join(self.plugin_path, self.find_plugin_folder(name))
+        plugin_folder = self.find_plugin_folder(name)
+        assert plugin_folder is not None
+        plugin_dir = path.join(self.plugin_path, plugin_folder)
 
         if not chown(plugin_dir) or not chmod(plugin_dir, 555):
             logger.error(f"chown/chmod exited with a non-zero exit code")
             return False
         return True
 
-    async def _download_remote_binaries_for_plugin_with_name(self, pluginBasePath):
+    async def _download_remote_binaries_for_plugin_with_name(self, pluginBasePath: str):
         rv = False
         try:
             packageJsonPath = path.join(pluginBasePath, 'package.json')
@@ -91,7 +108,7 @@ class PluginBrowser:
         return rv
 
     """Return the filename (only) for the specified plugin"""
-    def find_plugin_folder(self, name):
+    def find_plugin_folder(self, name: str) -> str | None:
         for folder in listdir(self.plugin_path):
             try:
                 with open(path.join(self.plugin_path, folder, 'plugin.json'), "r", encoding="utf-8") as f:
@@ -102,11 +119,13 @@ class PluginBrowser:
             except:
                 logger.debug(f"skipping {folder}")
 
-    async def uninstall_plugin(self, name):
+    async def uninstall_plugin(self, name: str):
         if self.loader.watcher:
             self.loader.watcher.disabled = True
         tab = await get_gamepadui_tab()
-        plugin_dir = path.join(self.plugin_path, self.find_plugin_folder(name))
+        plugin_folder = self.find_plugin_folder(name)
+        assert plugin_folder is not None
+        plugin_dir = path.join(self.plugin_path, )
         try:
             logger.info("uninstalling " + name)
             logger.info(" at dir " + plugin_dir)
@@ -133,7 +152,7 @@ class PluginBrowser:
         if self.loader.watcher:
             self.loader.watcher.disabled = False
 
-    async def _install(self, artifact, name, version, hash):
+    async def _install(self, artifact: str, name: str, version: str, hash: str):
         # Will be set later in code
         res_zip = None
 
@@ -185,6 +204,7 @@ class PluginBrowser:
         ret = self._unzip_to_plugin_dir(res_zip, name, hash)
         if ret:
             plugin_folder = self.find_plugin_folder(name)
+            assert plugin_folder is not None
             plugin_dir = path.join(self.plugin_path, plugin_folder)
             ret = await self._download_remote_binaries_for_plugin_with_name(plugin_dir)
             if ret:
@@ -206,14 +226,14 @@ class PluginBrowser:
         if self.loader.watcher:
             self.loader.watcher.disabled = False
 
-    async def request_plugin_install(self, artifact, name, version, hash, install_type):
+    async def request_plugin_install(self, artifact: str, name: str, version: str, hash: str, install_type: PluginInstallType):
         request_id = str(time())
         self.install_requests[request_id] = PluginInstallContext(artifact, name, version, hash)
         tab = await get_gamepadui_tab()
         await tab.open_websocket()
         await tab.evaluate_js(f"DeckyPluginLoader.addPluginInstallPrompt('{name}', '{version}', '{request_id}', '{hash}', {install_type})")
 
-    async def request_multiple_plugin_installs(self, requests):
+    async def request_multiple_plugin_installs(self, requests: List[PluginInstallRequest]):
         request_id = str(time())
         self.install_requests[request_id] = [PluginInstallContext(req['artifact'], req['name'], req['version'], req['hash']) for req in requests]
         js_requests_parameter = ','.join([
@@ -224,17 +244,17 @@ class PluginBrowser:
         await tab.open_websocket()
         await tab.evaluate_js(f"DeckyPluginLoader.addMultiplePluginsInstallPrompt('{request_id}', [{js_requests_parameter}])")
 
-    async def confirm_plugin_install(self, request_id):
+    async def confirm_plugin_install(self, request_id: str):
         requestOrRequests = self.install_requests.pop(request_id)
         if isinstance(requestOrRequests, list):
             [await self._install(req.artifact, req.name, req.version, req.hash) for req in requestOrRequests]
         else:
             await self._install(requestOrRequests.artifact, requestOrRequests.name, requestOrRequests.version, requestOrRequests.hash)
 
-    def cancel_plugin_install(self, request_id):
+    def cancel_plugin_install(self, request_id: str):
         self.install_requests.pop(request_id)
 
-    def cleanup_plugin_settings(self, name):
+    def cleanup_plugin_settings(self, name: str):
         """Removes any settings related to a plugin. Propably called when a plugin is uninstalled.
 
         Args:
diff --git a/backend/helpers.py b/backend/helpers.py
index a1877fb8..4036db85 100644
--- a/backend/helpers.py
+++ b/backend/helpers.py
@@ -2,13 +2,13 @@ import re
 import ssl
 import uuid
 import os
-import sys
 import subprocess
 from hashlib import sha256
 from io import BytesIO
 
 import certifi
-from aiohttp.web import Response, middleware
+from aiohttp.web import Request, Response, middleware
+from aiohttp.typedefs import Handler
 from aiohttp import ClientSession
 import localplatform
 from customtypes import UserType
@@ -31,17 +31,17 @@ def get_csrf_token():
     return csrf_token
 
 @middleware
-async def csrf_middleware(request, handler):
+async def csrf_middleware(request: Request, handler: Handler):
     if str(request.method) == "OPTIONS" or request.headers.get('Authentication') == csrf_token or str(request.rel_url) == "/auth/token" or str(request.rel_url).startswith("/plugins/load_main/") or str(request.rel_url).startswith("/static/") or str(request.rel_url).startswith("/legacy/") or str(request.rel_url).startswith("/steam_resource/") or str(request.rel_url).startswith("/frontend/") or assets_regex.match(str(request.rel_url)) or frontend_regex.match(str(request.rel_url)):
         return await handler(request)
-    return Response(text='Forbidden', status='403')
+    return Response(text='Forbidden', status=403)
 
 # Get the default homebrew path unless a home_path is specified. home_path argument is deprecated
-def get_homebrew_path(home_path = None) -> str:
+def get_homebrew_path() -> str:
     return localplatform.get_unprivileged_path()
 
 # Recursively create path and chown as user
-def mkdir_as_user(path):
+def mkdir_as_user(path: str):
     path = os.path.realpath(path)
     os.makedirs(path, exist_ok=True)
     localplatform.chown(path)
@@ -57,23 +57,18 @@ def get_loader_version() -> str:
 
 # returns the appropriate system python paths
 def get_system_pythonpaths() -> list[str]:
-    extra_args = {}
-
-    if localplatform.ON_LINUX:
-        # run as normal normal user to also include user python paths
-        extra_args["user"] = localplatform.localplatform._get_user_id()
-        extra_args["env"] = {}
-
     try:
+        # run as normal normal user if on linux to also include user python paths
         proc = subprocess.run(["python3" if localplatform.ON_LINUX else "python", "-c", "import sys; print('\\n'.join(x for x in sys.path if x))"],
-                              capture_output=True, **extra_args)
+        # TODO make this less insane
+                              capture_output=True, user=localplatform.localplatform._get_user_id() if localplatform.ON_LINUX else None, env={} if localplatform.ON_LINUX else None) # type: ignore
         return [x.strip() for x in proc.stdout.decode().strip().split("\n")]
     except Exception as e:
         logger.warn(f"Failed to execute get_system_pythonpaths(): {str(e)}")
         return []
 
 # Download Remote Binaries to local Plugin
-async def download_remote_binary_to_path(url, binHash, path) -> bool:
+async def download_remote_binary_to_path(url: str, binHash: str, path: str) -> bool:
     rv = False
     try:
         if os.access(os.path.dirname(path), os.W_OK):
@@ -110,46 +105,42 @@ def set_user_group() -> str:
 
 # Get the user id hosting the plugin loader
 def get_user_id() -> int:
-    return localplatform.localplatform._get_user_id()
+    return localplatform.localplatform._get_user_id() # pyright: ignore [reportPrivateUsage]
 
 # Get the user hosting the plugin loader
 def get_user() -> str:
-    return localplatform.localplatform._get_user()
+    return localplatform.localplatform._get_user() # pyright: ignore [reportPrivateUsage]
 
 # Get the effective user id of the running process
 def get_effective_user_id() -> int:
-    return localplatform.localplatform._get_effective_user_id()
+    return localplatform.localplatform._get_effective_user_id() # pyright: ignore [reportPrivateUsage]
 
 # Get the effective user of the running process
 def get_effective_user() -> str:
-    return localplatform.localplatform._get_effective_user()
+    return localplatform.localplatform._get_effective_user() # pyright: ignore [reportPrivateUsage]
 
 # Get the effective user group id of the running process
 def get_effective_user_group_id() -> int:
-    return localplatform.localplatform._get_effective_user_group_id()
+    return localplatform.localplatform._get_effective_user_group_id() # pyright: ignore [reportPrivateUsage]
 
 # Get the effective user group of the running process
 def get_effective_user_group() -> str:
-    return localplatform.localplatform._get_effective_user_group()
+    return localplatform.localplatform._get_effective_user_group() # pyright: ignore [reportPrivateUsage]
 
 # Get the user owner of the given file path.
-def get_user_owner(file_path) -> str:
-    return localplatform.localplatform._get_user_owner(file_path)
+def get_user_owner(file_path: str) -> str:
+    return localplatform.localplatform._get_user_owner(file_path) # pyright: ignore [reportPrivateUsage]
 
-# Get the user group of the given file path.
-def get_user_group(file_path) -> str:
-    return localplatform.localplatform._get_user_group(file_path)
+# Get the user group of the given file path, or the user group hosting the plugin loader
+def get_user_group(file_path: str | None = None) -> str:
+    return localplatform.localplatform._get_user_group(file_path) # pyright: ignore [reportPrivateUsage]
 
 # Get the group id of the user hosting the plugin loader
 def get_user_group_id() -> int:
-    return localplatform.localplatform._get_user_group_id()
-
-# Get the group of the user hosting the plugin loader
-def get_user_group() -> str:
-    return localplatform.localplatform._get_user_group()
+    return localplatform.localplatform._get_user_group_id() # pyright: ignore [reportPrivateUsage]
 
 # Get the default home path unless a user is specified
-def get_home_path(username = None) -> str:
+def get_home_path(username: str | None = None) -> str:
     return localplatform.get_home_path(UserType.ROOT if username == "root" else UserType.HOST_USER)
 
 async def is_systemd_unit_active(unit_name: str) -> bool:
diff --git a/backend/injector.py b/backend/injector.py
index e3414fee..a217f689 100644
--- a/backend/injector.py
+++ b/backend/injector.py
@@ -2,10 +2,9 @@
 
 from asyncio import sleep
 from logging import getLogger
-from traceback import format_exc
-from typing import List
+from typing import Any, Callable, List, TypedDict, Dict
 
-from aiohttp import ClientSession, WSMsgType
+from aiohttp import ClientSession
 from aiohttp.client_exceptions import ClientConnectorError, ClientOSError
 from asyncio.exceptions import TimeoutError
 import uuid
@@ -14,35 +13,43 @@ BASE_ADDRESS = "http://localhost:8080"
 
 logger = getLogger("Injector")
 
+class _TabResponse(TypedDict):
+    title: str
+    id: str
+    url: str
+    webSocketDebuggerUrl: str
 
 class Tab:
     cmd_id = 0
 
-    def __init__(self, res) -> None:
-        self.title = res["title"]
-        self.id = res["id"]
-        self.url = res["url"]
-        self.ws_url = res["webSocketDebuggerUrl"]
+    def __init__(self, res: _TabResponse) -> None:
+        self.title: str = res["title"]
+        self.id: str = res["id"]
+        self.url: str = res["url"]
+        self.ws_url: str = res["webSocketDebuggerUrl"]
 
         self.websocket = None
         self.client = None
 
     async def open_websocket(self):
         self.client = ClientSession()
-        self.websocket = await self.client.ws_connect(self.ws_url)
+        self.websocket = await self.client.ws_connect(self.ws_url) # type: ignore
 
     async def close_websocket(self):
-        await self.websocket.close()
-        await self.client.close()
+        if self.websocket:
+            await self.websocket.close()
+        if self.client:
+            await self.client.close()
 
     async def listen_for_message(self):
-        async for message in self.websocket:
-            data = message.json()
-            yield data
-        logger.warn(f"The Tab {self.title} socket has been disconnected while listening for messages.")
-        await self.close_websocket()
+        if self.websocket:
+            async for message in self.websocket:
+                data = message.json()
+                yield data
+            logger.warn(f"The Tab {self.title} socket has been disconnected while listening for messages.")
+            await self.close_websocket()
             
-    async def _send_devtools_cmd(self, dc, receive=True):
+    async def _send_devtools_cmd(self, dc: Dict[str, Any], receive: bool = True):
         if self.websocket:
             self.cmd_id += 1
             dc["id"] = self.cmd_id
@@ -54,7 +61,7 @@ class Tab:
             return None
         raise RuntimeError("Websocket not opened")
 
-    async def evaluate_js(self, js, run_async=False, manage_socket=True, get_result=True):
+    async def evaluate_js(self, js: str, run_async: bool | None = False, manage_socket: bool | None = True, get_result: bool = True):
         try:
             if manage_socket:
                 await self.open_websocket()
@@ -73,15 +80,16 @@ class Tab:
                 await self.close_websocket()
         return res
 
-    async def has_global_var(self, var_name, manage_socket=True):
+    async def has_global_var(self, var_name: str, manage_socket: bool = True):
         res = await self.evaluate_js(f"window['{var_name}'] !== null && window['{var_name}'] !== undefined", False, manage_socket)
+        assert res is not None
 
         if not "result" in res or not "result" in res["result"] or not "value" in res["result"]["result"]:
             return False
 
         return res["result"]["result"]["value"]
 
-    async def close(self, manage_socket=True):
+    async def close(self, manage_socket: bool = True):
         try:
             if manage_socket:
                 await self.open_websocket()
@@ -111,7 +119,7 @@ class Tab:
             "method": "Page.disable",
         }, False)
 
-    async def refresh(self, manage_socket=True):
+    async def refresh(self, manage_socket: bool = True):
         try:
             if manage_socket:
                 await self.open_websocket()
@@ -125,7 +133,7 @@ class Tab:
                 await self.close_websocket()
 
         return
-    async def reload_and_evaluate(self, js, manage_socket=True):
+    async def reload_and_evaluate(self, js: str, manage_socket: bool = True):
         """
         Reloads the current tab, with JS to run on load via debugger
         """
@@ -153,11 +161,13 @@ class Tab:
                 }
             }, True)
 
+            assert breakpoint_res is not None
+
             logger.info(breakpoint_res)
             
             # Page finishes loading when breakpoint hits
 
-            for x in range(20):
+            for _ in range(20):
                 # this works around 1/5 of the time, so just send it 8 times.
                 # the js accounts for being injected multiple times allowing only one instance to run at a time anyway
                 await self._send_devtools_cmd({
@@ -176,7 +186,7 @@ class Tab:
                 }
             }, False)
 
-            for x in range(4):
+            for _ in range(4):
                 await self._send_devtools_cmd({
                     "method": "Debugger.resume"
                 }, False)
@@ -190,7 +200,7 @@ class Tab:
                 await self.close_websocket()
         return
 
-    async def add_script_to_evaluate_on_new_document(self, js, add_dom_wrapper=True, manage_socket=True, get_result=True):
+    async def add_script_to_evaluate_on_new_document(self, js: str, add_dom_wrapper: bool = True, manage_socket: bool = True, get_result: bool = True):
         """
         How the underlying call functions is not particularly clear from the devtools docs, so stealing puppeteer's description:
 
@@ -253,7 +263,7 @@ class Tab:
                 await self.close_websocket()
         return res
 
-    async def remove_script_to_evaluate_on_new_document(self, script_id, manage_socket=True):
+    async def remove_script_to_evaluate_on_new_document(self, script_id: str, manage_socket: bool = True):
         """
         Removes a script from a page that was added with `add_script_to_evaluate_on_new_document`
 
@@ -267,7 +277,7 @@ class Tab:
             if manage_socket:
                 await self.open_websocket()
 
-            res = await self._send_devtools_cmd({
+            await self._send_devtools_cmd({
                 "method": "Page.removeScriptToEvaluateOnNewDocument",
                 "params": {
                     "identifier": script_id
@@ -278,15 +288,16 @@ class Tab:
             if manage_socket:
                 await self.close_websocket()
 
-    async def has_element(self, element_name, manage_socket=True):
+    async def has_element(self, element_name: str, manage_socket: bool = True):
         res = await self.evaluate_js(f"document.getElementById('{element_name}') != null", False, manage_socket)
+        assert res is not None
 
         if not "result" in res or not "result" in res["result"] or not "value" in res["result"]["result"]:
             return False
 
         return res["result"]["result"]["value"]
 
-    async def inject_css(self, style, manage_socket=True):
+    async def inject_css(self, style: str, manage_socket: bool = True):
         try:
             css_id = str(uuid.uuid4())
 
@@ -300,6 +311,8 @@ class Tab:
                 }})()
                 """, False, manage_socket)
 
+            assert result is not None
+
             if "exceptionDetails" in result["result"]:
                 return {
                     "success": False,
@@ -316,7 +329,7 @@ class Tab:
                 "result": e
             }
 
-    async def remove_css(self, css_id, manage_socket=True):
+    async def remove_css(self, css_id: str, manage_socket: bool = True):
         try:
             result = await self.evaluate_js(
                 f"""
@@ -328,6 +341,8 @@ class Tab:
                 }})()
                 """, False, manage_socket)
 
+            assert result is not None
+
             if "exceptionDetails" in result["result"]:
                 return {
                     "success": False,
@@ -343,8 +358,9 @@ class Tab:
                 "result": e
             }
 
-    async def get_steam_resource(self, url):
+    async def get_steam_resource(self, url: str):
         res = await self.evaluate_js(f'(async function test() {{ return await (await fetch("{url}")).text() }})()', True)
+        assert res is not None
         return res["result"]["result"]["value"]
 
     def __repr__(self):
@@ -380,14 +396,14 @@ async def get_tabs() -> List[Tab]:
         raise Exception(f"/json did not return 200. {await res.text()}")
 
 
-async def get_tab(tab_name) -> Tab:
+async def get_tab(tab_name: str) -> Tab:
     tabs = await get_tabs()
     tab = next((i for i in tabs if i.title == tab_name), None)
     if not tab:
         raise ValueError(f"Tab {tab_name} not found")
     return tab
 
-async def get_tab_lambda(test) -> Tab:
+async def get_tab_lambda(test: Callable[[Tab], bool]) -> Tab:
     tabs = await get_tabs()
     tab = next((i for i in tabs if test(i)), None)
     if not tab:
@@ -408,7 +424,7 @@ async def get_gamepadui_tab() -> Tab:
         raise ValueError(f"GamepadUI Tab not found")
     return tab
 
-async def inject_to_tab(tab_name, js, run_async=False):
+async def inject_to_tab(tab_name: str, js: str, run_async: bool = False):
     tab = await get_tab(tab_name)
 
     return await tab.evaluate_js(js, run_async)
diff --git a/backend/loader.py b/backend/loader.py
index d07b1c08..89bb0457 100644
--- a/backend/loader.py
+++ b/backend/loader.py
@@ -1,34 +1,40 @@
-from asyncio import Queue, sleep
+from asyncio import AbstractEventLoop, Queue, sleep
 from json.decoder import JSONDecodeError
 from logging import getLogger
 from os import listdir, path
 from pathlib import Path
 from traceback import print_exc
+from typing import Any, Tuple
 
 from aiohttp import web
 from os.path import exists
-from watchdog.events import RegexMatchingEventHandler
-from watchdog.observers import Observer
+from watchdog.events import RegexMatchingEventHandler, DirCreatedEvent, DirModifiedEvent, FileCreatedEvent, FileModifiedEvent # type: ignore
+from watchdog.observers import Observer # type: ignore
 
-from injector import get_tab, get_gamepadui_tab
-from plugin import PluginWrapper
+from backend.main import PluginManager # type: ignore
+
+from .injector import get_tab, get_gamepadui_tab
+from .plugin import PluginWrapper
+
+Plugins = dict[str, PluginWrapper]
+ReloadQueue = Queue[Tuple[str, str, bool | None] | Tuple[str, str]]
 
 class FileChangeHandler(RegexMatchingEventHandler):
-    def __init__(self, queue, plugin_path) -> None:
-        super().__init__(regexes=[r'^.*?dist\/index\.js$', r'^.*?main\.py$'])
+    def __init__(self, queue: ReloadQueue, plugin_path: str) -> None:
+        super().__init__(regexes=[r'^.*?dist\/index\.js$', r'^.*?main\.py$']) # type: ignore
         self.logger = getLogger("file-watcher")
         self.plugin_path = plugin_path
         self.queue = queue
         self.disabled = True
 
-    def maybe_reload(self, src_path):
+    def maybe_reload(self, src_path: str):
         if self.disabled:
             return
         plugin_dir = Path(path.relpath(src_path, self.plugin_path)).parts[0]
         if exists(path.join(self.plugin_path, plugin_dir, "plugin.json")):
             self.queue.put_nowait((path.join(self.plugin_path, plugin_dir, "main.py"), plugin_dir, True))
 
-    def on_created(self, event):
+    def on_created(self, event: DirCreatedEvent | FileCreatedEvent):
         src_path = event.src_path
         if "__pycache__" in src_path:
             return
@@ -42,7 +48,7 @@ class FileChangeHandler(RegexMatchingEventHandler):
         self.logger.debug(f"file created: {src_path}")
         self.maybe_reload(src_path)
 
-    def on_modified(self, event):
+    def on_modified(self, event: DirModifiedEvent | FileModifiedEvent):
         src_path = event.src_path
         if "__pycache__" in src_path:
             return
@@ -57,25 +63,25 @@ class FileChangeHandler(RegexMatchingEventHandler):
         self.maybe_reload(src_path)
 
 class Loader:
-    def __init__(self, server_instance, plugin_path, loop, live_reload=False) -> None:
+    def __init__(self, server_instance: PluginManager, plugin_path: str, loop: AbstractEventLoop, live_reload: bool =False) -> None:
         self.loop = loop
         self.logger = getLogger("Loader")
         self.plugin_path = plugin_path
         self.logger.info(f"plugin_path: {self.plugin_path}")
-        self.plugins : dict[str, PluginWrapper] = {}
+        self.plugins: Plugins = {}
         self.watcher = None
         self.live_reload = live_reload
-        self.reload_queue = Queue()
+        self.reload_queue: ReloadQueue = Queue()
         self.loop.create_task(self.handle_reloads())
 
         if live_reload:
             self.observer = Observer()
             self.watcher = FileChangeHandler(self.reload_queue, plugin_path)
-            self.observer.schedule(self.watcher, self.plugin_path, recursive=True)
+            self.observer.schedule(self.watcher, self.plugin_path, recursive=True) # type: ignore
             self.observer.start()
             self.loop.create_task(self.enable_reload_wait())
             
-        server_instance.add_routes([
+        server_instance.web_app.add_routes([
             web.get("/frontend/{path:.*}", self.handle_frontend_assets),
             web.get("/locales/{path:.*}", self.handle_frontend_locales),
             web.get("/plugins", self.get_plugins),
@@ -93,15 +99,16 @@ class Loader:
     async def enable_reload_wait(self):
         if self.live_reload:
             await sleep(10)
-            self.logger.info("Hot reload enabled")
-            self.watcher.disabled = False
+            if self.watcher:
+                self.logger.info("Hot reload enabled")
+                self.watcher.disabled = False
 
-    async def handle_frontend_assets(self, request):
+    async def handle_frontend_assets(self, request: web.Request):
         file = path.join(path.dirname(__file__), "static", request.match_info["path"])
 
         return web.FileResponse(file, headers={"Cache-Control": "no-cache"})
 
-    async def handle_frontend_locales(self, request):
+    async def handle_frontend_locales(self, request: web.Request):
         req_lang = request.match_info["path"]
         file = path.join(path.dirname(__file__), "locales", req_lang)
         if exists(file):
@@ -110,23 +117,23 @@ class Loader:
             self.logger.info(f"Language {req_lang} not available, returning an empty dictionary")
             return web.json_response(data={}, headers={"Cache-Control": "no-cache"})
 
-    async def get_plugins(self, request):
+    async def get_plugins(self, request: web.Request):
         plugins = list(self.plugins.values())
         return web.json_response([{"name": str(i) if not i.legacy else "$LEGACY_"+str(i), "version": i.version} for i in plugins])
 
-    def handle_plugin_frontend_assets(self, request):
+    async def handle_plugin_frontend_assets(self, request: web.Request):
         plugin = self.plugins[request.match_info["plugin_name"]]
         file = path.join(self.plugin_path, plugin.plugin_directory, "dist/assets", request.match_info["path"])
 
         return web.FileResponse(file, headers={"Cache-Control": "no-cache"})
 
-    def handle_frontend_bundle(self, request):
+    async def handle_frontend_bundle(self, request: web.Request):
         plugin = self.plugins[request.match_info["plugin_name"]]
 
         with open(path.join(self.plugin_path, plugin.plugin_directory, "dist/index.js"), "r", encoding="utf-8") as bundle:
             return web.Response(text=bundle.read(), content_type="application/javascript")
 
-    def import_plugin(self, file, plugin_directory, refresh=False, batch=False):
+    def import_plugin(self, file: str, plugin_directory: str, refresh: bool | None = False, batch: bool | None = False):
         try:
             plugin = PluginWrapper(file, plugin_directory, self.plugin_path)
             if plugin.name in self.plugins:
@@ -146,7 +153,7 @@ class Loader:
             self.logger.error(f"Could not load {file}. {e}")
             print_exc()
 
-    async def dispatch_plugin(self, name, version):
+    async def dispatch_plugin(self, name: str, version: str | None):
         gpui_tab = await get_gamepadui_tab()
         await gpui_tab.evaluate_js(f"window.importDeckyPlugin('{name}', '{version}')")
 
@@ -161,15 +168,15 @@ class Loader:
     async def handle_reloads(self):
         while True:
             args = await self.reload_queue.get()
-            self.import_plugin(*args)
+            self.import_plugin(*args) # type: ignore
 
-    async def handle_plugin_method_call(self, request):
+    async def handle_plugin_method_call(self, request: web.Request):
         res = {}
         plugin = self.plugins[request.match_info["plugin_name"]]
         method_name = request.match_info["method_name"]
         try:
             method_info = await request.json()
-            args = method_info["args"]
+            args: Any = method_info["args"]
         except JSONDecodeError:
             args = {}
         try:
@@ -189,7 +196,7 @@ class Loader:
     can introduce it more smoothly and give people the chance to sample the new features even
     without plugin support. They will be removed once legacy plugins are no longer relevant.
     """
-    async def load_plugin_main_view(self, request):
+    async def load_plugin_main_view(self, request: web.Request):
         plugin = self.plugins[request.match_info["name"]]
         with open(path.join(self.plugin_path, plugin.plugin_directory, plugin.main_view_html), "r", encoding="utf-8") as template:
             template_data = template.read()
@@ -201,7 +208,7 @@ class Loader:
             """
             return web.Response(text=ret, content_type="text/html")
 
-    async def handle_sub_route(self, request):
+    async def handle_sub_route(self, request: web.Request):
         plugin = self.plugins[request.match_info["name"]]
         route_path = request.match_info["path"]
         self.logger.info(path)
@@ -212,14 +219,14 @@ class Loader:
 
         return web.Response(text=ret)
 
-    async def get_steam_resource(self, request):
+    async def get_steam_resource(self, request: web.Request):
         tab = await get_tab("SP")
         try:
             return web.Response(text=await tab.get_steam_resource(f"https://steamloopback.host/{request.match_info['path']}"), content_type="text/html")
         except Exception as e:
             return web.Response(text=str(e), status=400)
 
-    async def handle_backend_reload_request(self, request):
+    async def handle_backend_reload_request(self, request: web.Request):
         plugin_name : str = request.match_info["plugin_name"]
         plugin = self.plugins[plugin_name]
 
diff --git a/backend/localplatformlinux.py b/backend/localplatformlinux.py
index 811db8a6..58b9dbc2 100644
--- a/backend/localplatformlinux.py
+++ b/backend/localplatformlinux.py
@@ -29,21 +29,17 @@ def _get_effective_user_group() -> str:
     return grp.getgrgid(_get_effective_user_group_id()).gr_name
 
 # Get the user owner of the given file path.
-def _get_user_owner(file_path) -> str:
+def _get_user_owner(file_path: str) -> str:
     return pwd.getpwuid(os.stat(file_path).st_uid).pw_name
 
-# Get the user group of the given file path.
-def _get_user_group(file_path) -> str:
-    return grp.getgrgid(os.stat(file_path).st_gid).gr_name
+# Get the user group of the given file path, or the user group hosting the plugin loader
+def _get_user_group(file_path: str | None = None) -> str:
+    return grp.getgrgid(os.stat(file_path).st_gid if file_path is not None else _get_user_group_id()).gr_name
 
 # Get the group id of the user hosting the plugin loader
 def _get_user_group_id() -> int:
     return pwd.getpwuid(_get_user_id()).pw_gid
 
-# Get the group of the user hosting the plugin loader
-def _get_user_group() -> str:
-    return grp.getgrgid(_get_user_group_id()).gr_name
-
 def chown(path : str,  user : UserType = UserType.HOST_USER, recursive : bool = True) -> bool:
     user_str = ""
 
@@ -146,7 +142,7 @@ def get_privileged_path() -> str:
 
     return path
 
-def _parent_dir(path : str) -> str:
+def _parent_dir(path : str | None) -> str | None:
     if path == None:
         return None
 
@@ -166,7 +162,7 @@ def get_unprivileged_path() -> str:
         # Expected path of loader binary is /home/deck/homebrew/service/PluginLoader
         path = _parent_dir(_parent_dir(os.path.realpath(sys.argv[0])))
 
-        if not os.path.exists(path):
+        if path != None and not os.path.exists(path):
             path = None
 
     if path == None:
diff --git a/backend/main.py b/backend/main.py
index ae11b066..433b202f 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -7,16 +7,16 @@ from localplatform import (chmod, chown, service_stop, service_start,
 if hasattr(sys, '_MEIPASS'):
     chmod(sys._MEIPASS, 755) # type: ignore
 # Full imports
-from asyncio import new_event_loop, set_event_loop, sleep
+from asyncio import AbstractEventLoop, new_event_loop, set_event_loop, sleep
 from logging import basicConfig, getLogger
 from os import path
 from traceback import format_exc
 import multiprocessing
 
-import aiohttp_cors
+import aiohttp_cors # type: ignore
 # Partial imports
 from aiohttp import client_exceptions
-from aiohttp.web import Application, Response, get, run_app, static
+from aiohttp.web import Application, Response, get, run_app, static # type: ignore
 from aiohttp_jinja2 import setup as jinja_setup
 
 # local modules
@@ -51,7 +51,7 @@ if get_chown_plugin_path() == True:
     chown_plugin_dir()
 
 class PluginManager:
-    def __init__(self, loop) -> None:
+    def __init__(self, loop: AbstractEventLoop) -> None:
         self.loop = loop
         self.web_app = Application()
         self.web_app.middlewares.append(csrf_middleware)
@@ -62,7 +62,7 @@ class PluginManager:
                 allow_credentials=True
             )
         })
-        self.plugin_loader = Loader(self.web_app, plugin_path, self.loop, get_live_reload())
+        self.plugin_loader = Loader(self, plugin_path, self.loop, get_live_reload())
         self.settings = SettingsManager("loader", path.join(get_privileged_path(), "settings"))
         self.plugin_browser = PluginBrowser(plugin_path, self.plugin_loader.plugins, self.plugin_loader, self.settings) 
         self.utilities = Utilities(self)
diff --git a/backend/plugin.py b/backend/plugin.py
index 026a6b09..781d9f7b 100644
--- a/backend/plugin.py
+++ b/backend/plugin.py
@@ -1,7 +1,6 @@
 import multiprocessing
 from asyncio import (Lock, get_event_loop, new_event_loop,
                      set_event_loop, sleep)
-from concurrent.futures import ProcessPoolExecutor
 from importlib.util import module_from_spec, spec_from_file_location
 from json import dumps, load, loads
 from logging import getLogger
@@ -9,14 +8,14 @@ from traceback import format_exc
 from os import path, environ
 from signal import SIGINT, signal
 from sys import exit, path as syspath
-from time import time
+from typing import Any, Dict
 from localsocket import LocalSocket
 from localplatform import setgid, setuid, get_username, get_home_path
 from customtypes import UserType
 import helpers
 
 class PluginWrapper:
-    def __init__(self, file, plugin_directory, plugin_path) -> None:
+    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
@@ -73,14 +72,17 @@ class PluginWrapper:
             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
-            environ["DECKY_PLUGIN_VERSION"] = self.version
+            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
 
@@ -118,7 +120,8 @@ class PluginWrapper:
             get_event_loop().close()
             raise Exception("Closing message listener")
 
-        d = {"res": None, "success": True}
+        # 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:
@@ -137,17 +140,18 @@ class PluginWrapper:
         if self.passive:
             return
 
-        async def _(self):
+        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, kwargs):
+    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()
+            # reader, writer = 
+            await self.socket.get_socket_connection()
 
             await self.socket.write_single_line(dumps({ "method": method_name, "args": kwargs }, ensure_ascii=False))
 
diff --git a/backend/settings.py b/backend/settings.py
index c00e6a82..26dfc97f 100644
--- a/backend/settings.py
+++ b/backend/settings.py
@@ -1,5 +1,6 @@
 from json import dump, load
 from os import mkdir, path, listdir, rename
+from typing import Any, Dict
 from localplatform import chown, folder_owner, get_chown_plugin_path
 from customtypes import UserType
 
@@ -7,7 +8,7 @@ from helpers import get_homebrew_path
 
 
 class SettingsManager:
-    def __init__(self, name, settings_directory = None) -> None:
+    def __init__(self, name: str, settings_directory: str | None = None) -> None:
         wrong_dir = get_homebrew_path()
         if settings_directory == None:
             settings_directory = path.join(wrong_dir, "settings")
@@ -31,11 +32,11 @@ class SettingsManager:
         if folder_owner(settings_directory) != expected_user:
             chown(settings_directory, expected_user, False)
 
-        self.settings = {}
+        self.settings: Dict[str, Any] = {}
 
         try:
             open(self.path, "x", encoding="utf-8")
-        except FileExistsError as e:
+        except FileExistsError as _:
             self.read()
             pass
 
@@ -51,9 +52,9 @@ class SettingsManager:
         with open(self.path, "w+", encoding="utf-8") as file:
             dump(self.settings, file, indent=4, ensure_ascii=False)
 
-    def getSetting(self, key, default=None):
+    def getSetting(self, key: str, default: Any = None) -> Any:
         return self.settings.get(key, default)
 
-    def setSetting(self, key, value):
+    def setSetting(self, key: str, value: Any) -> Any:
         self.settings[key] = value
         self.commit()
diff --git a/backend/utilities.py b/backend/utilities.py
index bcb35578..72b6f008 100644
--- a/backend/utilities.py
+++ b/backend/utilities.py
@@ -1,26 +1,27 @@
 import uuid
-import os
 from json.decoder import JSONDecodeError
 from os.path import splitext
 import re
 from traceback import format_exc
-from stat import FILE_ATTRIBUTE_HIDDEN
+from stat import FILE_ATTRIBUTE_HIDDEN # type: ignore
 
-from asyncio import sleep, start_server, gather, open_connection
+from asyncio import start_server, gather, open_connection
 from aiohttp import ClientSession, web
+from typing import Dict
 
 from logging import getLogger
+from backend.browser import PluginInstallType
+from backend.main import PluginManager
 from injector import inject_to_tab, get_gamepadui_tab, close_old_tabs, get_tab
 from pathlib import Path
 from localplatform import ON_WINDOWS
 import helpers
-import subprocess
 from localplatform import service_stop, service_start, get_home_path, get_username
 
 class Utilities:
-    def __init__(self, context) -> None:
+    def __init__(self, context: PluginManager) -> None:
         self.context = context
-        self.util_methods = {
+        self.util_methods: Dict[] = {
             "ping": self.ping,
             "http_request": self.http_request,
             "install_plugin": self.install_plugin,
@@ -69,7 +70,7 @@ class Utilities:
             res["success"] = False
         return web.json_response(res)
 
-    async def install_plugin(self, artifact="", name="No name", version="dev", hash=False, install_type=0):
+    async def install_plugin(self, artifact="", name="No name", version="dev", hash=False, install_type=PluginInstallType.INSTALL):
         return await self.context.plugin_browser.request_plugin_install(
             artifact=artifact,
             name=name,