#!/usr/bin/env python # coding: utf-8 import json import logging import os import shlex import shutil from base64 import b64decode from datetime import datetime from random import choice as randchoice from requests.exceptions import HTTPError from typing import List from legendary.api.egs import EPCAPI from legendary.downloader.manager import DLManager from legendary.lfs.egl import EPCLFS from legendary.lfs.lgndry import LGDLFS from legendary.lfs.utils import clean_filename, delete_folder from legendary.models.downloading import AnalysisResult, ConditionCheckResult from legendary.models.exceptions import * from legendary.models.game import * from legendary.models.json_manifest import JSONManifest from legendary.models.manifest import Manifest, ManifestMeta # ToDo: instead of true/false return values for success/failure actually raise an exception that the CLI/GUI # can handle to give the user more details. (Not required yet since there's no GUI so log output is fine) class LegendaryCore: """ LegendaryCore handles most of the lower level interaction with the downloader, lfs, and api components to make writing CLI/GUI code easier and cleaner and avoid duplication. """ def __init__(self): self.log = logging.getLogger('Core') self.egs = EPCAPI() self.lgd = LGDLFS() # epic lfs only works on Windows right now if os.name == 'nt': self.egl = EPCLFS() else: self.egl = None def auth(self, username, password): """ Attempts direct non-web login, raises CaptchaError if manual login is required :param username: :param password: :return: """ raise NotImplementedError def auth_code(self, code) -> bool: """ Handles authentication via exchange code (either retrieved manually or automatically) """ try: self.lgd.userdata = self.egs.start_session(exchange_token=code) return True except Exception as e: self.log.error(f'Logging in failed with {e!r}, please try again.') return False def auth_import(self) -> bool: """Import refresh token from EGL installation and use it for logging in""" self.egl.read_config() remember_me_data = self.egl.config.get('RememberMe', 'Data') re_data = json.loads(b64decode(remember_me_data))[0] if 'Token' not in re_data: raise ValueError('No login session in config') refresh_token = re_data['Token'] try: self.lgd.userdata = self.egs.start_session(refresh_token=refresh_token) return True except Exception as e: self.log.error(f'Logging in failed with {e!r}, please try again.') return False def login(self) -> bool: """ Attempts logging in with existing credentials. raises ValueError if no existing credentials or InvalidCredentialsError if the API return an error """ if not self.lgd.userdata: raise ValueError('No saved credentials') if self.lgd.userdata['expires_at']: dt_old = datetime.fromisoformat(self.lgd.userdata['expires_at'][:-1]) dt_now = datetime.utcnow() td = dt_now - dt_old # if session still has at least 10 minutes left we can re-use it. if td.total_seconds() < (self.lgd.userdata['expires_in'] - 600): self.log.debug('Reusing existing login session...') self.egs.resume_session(self.lgd.userdata) return True try: userdata = self.egs.start_session(self.lgd.userdata['refresh_token']) except InvalidCredentialsError: self.log.error('Stored credentials are no longer valid! Please login again.') self.lgd.invalidate_userdata() return False except HTTPError as e: self.log.error(f'HTTP request for login failed: {e!r}, please try again later.') return False self.lgd.userdata = userdata return True def get_assets(self, update_assets=False) -> List[GameAsset]: if not self.lgd.assets or update_assets: self.lgd.assets = [GameAsset.from_egs_json(a) for a in self.egs.get_game_assets()] return self.lgd.assets def get_asset(self, app_name, update=False) -> GameAsset: if update: self.get_assets(update_assets=True) return next(i for i in self.lgd.assets if i.app_name == app_name) def get_game(self, app_name, update_meta=False) -> Game: if update_meta: self.get_game_list(True) return self.lgd.get_game_meta(app_name) def get_game_list(self, update_assets=True) -> List[Game]: _ret = [] for ga in self.get_assets(update_assets=update_assets): if ga.namespace == 'ue': # skip UE demo content continue game = self.lgd.get_game_meta(ga.app_name) if not game or (game and game.app_version != ga.build_version): if game and game.app_version != ga.build_version: self.log.info(f'Updating meta for {game.app_name} due to build version mismatch') eg_meta = self.egs.get_game_info(ga.namespace, ga.catalog_item_id) game = Game(app_name=ga.app_name, app_version=ga.build_version, app_title=eg_meta['title'], asset_info=ga, metadata=eg_meta) self.lgd.set_game_meta(game.app_name, game) _ret.append(game) return _ret def get_installed_list(self) -> List[InstalledGame]: return self.lgd.get_installed_list() def get_installed_game(self, app_name) -> InstalledGame: return self.lgd.get_installed_game(app_name) def get_launch_parameters(self, app_name: str, offline: bool = False, user: str = None, extra_args: list = None) -> (list, str, dict): install = self.lgd.get_installed_game(app_name) game_token = '' if not offline: self.log.info('Getting authentication token...') game_token = self.egs.get_game_token()['code'] user_name = self.lgd.userdata['displayName'] account_id = self.lgd.userdata['account_id'] if user: user_name = user game_exe = os.path.join(install.install_path, install.executable) working_dir = os.path.split(game_exe)[0] params = [] if os.name != 'nt': params.append(self.lgd.config.get(app_name, 'wine_executable', fallback='wine')) params.append(game_exe) if install.launch_parameters: params.extend(shlex.split(install.launch_parameters)) params.extend([ '-AUTH_LOGIN=unused', f'-AUTH_PASSWORD={game_token}', '-AUTH_TYPE=exchangecode', f'-epicapp={app_name}', '-epicenv=Prod', '-EpicPortal', f'-epicusername={user_name}', f'-epicuserid={account_id}', '-epiclocale=en' ]) if extra_args: params.extend(extra_args) if config_args := self.lgd.config.get(app_name, 'start_params', fallback=None): params.extend(shlex.split(config_args.strip())) # get environment overrides from config env = None if f'{app_name}.env' in self.lgd.config: env = dict(self.lgd.config[f'{app_name}.env']) return params, working_dir, env def is_offline_game(self, app_name: str) -> bool: return self.lgd.config.getboolean(app_name, 'offline', fallback=False) def is_noupdate_game(self, app_name: str) -> bool: return self.lgd.config.getboolean(app_name, 'skip_update_check', fallback=False) def is_latest(self, app_name: str) -> bool: installed = self.lgd.get_installed_game(app_name) for ass in self.get_assets(True): if ass.app_name == app_name: if ass.build_version != installed.version: return False else: return True # if we get here something is very wrong raise ValueError(f'Could not find {app_name} in asset list!') def is_installed(self, app_name: str) -> bool: return self.lgd.get_installed_game(app_name) is not None @staticmethod def load_manfiest(data: bytes) -> Manifest: if data[0:1] == b'{': return JSONManifest.read_all(data) else: return Manifest.read_all(data) def prepare_download(self, game: Game, base_path: str = '', max_shm: int = 0, max_workers: int = 0, force: bool = False, disable_patching: bool = False, override_manifest: str = '', override_base_url: str = '') -> (DLManager, AnalysisResult, ManifestMeta): # load old manifest old_manifest = None new_manifest_data = b'' # load old manifest if we have one if not disable_patching and not force and self.is_installed(game.app_name): if old_bytes := self.lgd.get_manifest(game.app_name): old_manifest = self.load_manfiest(old_bytes) base_urls = list(game.base_urls) # copy list for manipulation if override_manifest: if override_manifest.startswith('http'): r = self.egs.unauth_session.get(override_manifest) r.raise_for_status() new_manifest_data = r.content base_urls = [r.url.rpartition('/')[0]] else: with open(override_manifest, 'rb') as f: new_manifest_data = f.read() else: # get latest manifest from API m_api_r = self.egs.get_game_manifest(game.asset_info.namespace, game.asset_info.catalog_item_id, game.app_name) # never seen this outside the launcher itself, but if it happens: PANIC! if len(m_api_r['elements']) > 1: raise ValueError('Manifest response has more than one element!') manifest_info = m_api_r['elements'][0] for manifest in manifest_info['manifests']: base_url = manifest['uri'].rpartition('/')[0] if base_url not in base_urls: base_urls.append(base_url) if 'queryParams' in manifest: continue self.log.debug(f'Downloading manifest from {manifest["uri"]} ...') r = self.egs.unauth_session.get(manifest['uri']) r.raise_for_status() new_manifest_data = r.content if override_base_url: base_urls = [override_base_url] self.log.debug(f'Base urls: {base_urls}') new_manifest = self.load_manfiest(new_manifest_data) self.lgd.save_manifest(game.app_name, new_manifest_data) # save manifest with version name in "old" folder as well for testing/downgrading/etc. self.lgd.save_manifest(game.app_name, new_manifest_data, filename=f'old/{game.app_name}_{new_manifest.meta.build_version}') if not base_path: base_path = self.get_default_install_dir() install_path = os.path.join( base_path, game.metadata.get('customAttributes', {}).get('FolderName', {}).get('value', game.app_name) ) if not os.path.exists(install_path): os.makedirs(install_path) self.log.info(f'Install path: {install_path}') if not force: filename = clean_filename(f'{game.app_name}_{new_manifest.meta.build_version}.resume') resume_file = os.path.join(self.lgd.get_tmp_path(), filename) else: resume_file = None # randomly select one CDN base_url = randchoice(base_urls) self.log.debug(f'Using base URL: {base_url}') if not max_shm: max_shm = self.lgd.config.getint('Legendary', 'max_memory', fallback=1024) dlm = DLManager(install_path, base_url, resume_file=resume_file, max_shared_memory=max_shm * 1024 * 1024, max_workers=max_workers) anlres = dlm.run_analysis(manifest=new_manifest, old_manifest=old_manifest, patch=not disable_patching, resume=not force) prereq = None if new_manifest.meta.prereq_ids: prereq = dict(ids=new_manifest.meta.prereq_ids, name=new_manifest.meta.prereq_name, path=new_manifest.meta.prereq_path, args=new_manifest.meta.prereq_args) igame = InstalledGame(app_name=game.app_name, title=game.app_title, version=game.app_version, prereq_info=prereq, manifest_path=override_manifest, base_urls=base_urls, install_path=install_path, executable=new_manifest.meta.launch_exe, launch_parameters=new_manifest.meta.launch_command) return dlm, anlres, igame @staticmethod def check_installation_conditions(analysis: AnalysisResult, install: InstalledGame) -> ConditionCheckResult: # ToDo add more checks in the future results = ConditionCheckResult(failures=list(), warnings=list()) # if on linux, check for eac in the files if os.name != 'nt': for f in analysis.manifest_comparison.added: if 'easyanticheat' in f.lower(): results.warnings.append('(Linux) The game uses EasyAntiCheat and may not run on linux') break # check if enough disk space is free (dl size is the approximate amount the installation will grow) min_disk_space = analysis.uncompressed_dl_size + analysis.biggest_file_size _, _, free = shutil.disk_usage(install.install_path) if free < min_disk_space: free_mib = free / 1024 / 1024 required_mib = min_disk_space / 1024 / 1024 results.failures.append(f'Not enough available disk space! {free_mib:.02f} MiB < {required_mib:.02f} MiB') return results def get_default_install_dir(self): return self.lgd.config.get('Legendary', 'install_dir', fallback=os.path.expanduser('~/legendary')) def install_game(self, installed_game: InstalledGame) -> dict: # todo class for result? """Save game metadata and info to mark it "installed" and also show the user the prerequisites""" self.lgd.set_installed_game(installed_game.app_name, installed_game) if installed_game.prereq_info: if not installed_game.prereq_info.get('installed', False): return installed_game.prereq_info return dict() def uninstall_game(self, installed_game: InstalledGame, delete_files=True): self.lgd.remove_installed_game(installed_game.app_name) if delete_files: delete_folder(installed_game.install_path, recursive=True) def prereq_installed(self, app_name): igame = self.lgd.get_installed_game(app_name) igame.prereq_info['installed'] = True self.lgd.set_installed_game(app_name, igame) def exit(self): """ Do cleanup, config saving, and exit. """ # self.lgd.clean_tmp_data() self.lgd.save_config()