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backend.py
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backend.py
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from cursepy import CurseClient
from tree_generator import gentree
from urllib.parse import unquote
from clint.textui import progress
from PyQt5.QtWidgets import QProgressBar
from time import perf_counter as now
import zipfile
import tempfile
import os
import json
import shutil
import requests
class ModPack:
def __init__(self, path: str, **kwargs) -> None:
self.log = kwargs.get("log_func")
self.secondry_log = kwargs.get("secondry_log")
# Set up the progress bar
self.progressbar = kwargs.get("pbar")
self.progressbar.setValue(0)
self.sec_progressbar = QProgressBar(kwargs.get("pbar2"))
self.output_dir = kwargs.get("output_dir")
self.download_optional = kwargs.get("download_optional_mods")
self.keep_config = kwargs.get("keep_config")
self.ini = False
self.path = path
def step(self, pbar: QProgressBar, value: int):
# Send the signal to the progress bar instead of directly updating it to avoid the progress bar from freezing
def init(self):
self.log("Initializing Curse client...", "info")
start = now()
self.c = CurseClient()
stop = now()
self.log(
"Successfully initialized Curse client in %s seconds" % str(stop - start),
"info",
)
del stop, start
self.log("Initializing ModPack...", "info")
start = now()
if self.path.endswith(".zip"):
self.tempdir = tempfile.mkdtemp(prefix="CMPDL")
self.log("Extracting modpack to %s" % self.tempdir, "info")
with zipfile.ZipFile(self.path, "r") as z:
z.extractall(self.tempdir)
self.log("Successfully extracted modpack", "info")
self.log("ModPack file structure:\n%s" % gentree(self.tempdir), "info")
self.manifest_path = os.path.join(self.tempdir, "manifest.json")
self.meth = "ZIP"
elif self.path.endswith(".json"):
self.manifest_path = self.path
self.meth = "JSON"
try:
self.log("Manifest path set to %s" % self.manifest_path, "info")
except AttributeError:
self.log("Manifest path not set", "info")
self.log("Loading manifest...", "info")
with open(self.manifest_path, "r") as f:
mani = json.load(f)
self.manifest = mani["files"]
self.log("Minecraft version: %s" % mani["minecraft"]["version"], "info")
self.log("Modpack version: %s" % mani["version"], "info")
self.log("Modpack name: %s" % mani["name"], "info")
self.log("Modpack author(s): %s" % mani["author"], "info")
self.log("Modpack description: %s" % mani.get("description"), "info")
self.log("Modpack website: %s" % mani.get("website"), "info")
self.log(
"Modpack modloader: %s" % mani["minecraft"]["modLoaders"][0]["id"], "info"
)
self.log("Modpack config/overrides: %s" % mani["overrides"], "info")
self.log("Successfully loaded manifest", "info")
if self.meth == "ZIP":
self.override_folder = os.path.join(self.tempdir, mani["overrides"])
del mani
stop = now()
self.log(
"Successfully initialized ModPack in %s seconds" % str(stop - start), "info"
)
del stop, start
self.ini = True
def install(self):
global mods_folder
self.log("Installing ModPack...", "info")
start = now()
if self.meth == "ZIP" and os.path.isdir(self.override_folder):
self.log("Extracting overrides to %s" % self.output_dir, "info")
for file in os.listdir(self.override_folder):
if os.path.isfile(os.path.join(self.override_folder, file)):
shutil.copyfile(
os.path.join(self.override_folder, file), self.output_dir
)
else:
try:
shutil.copytree(
os.path.join(self.override_folder, file),
os.path.join(self.output_dir, file),
)
except FileExistsError:
shutil.rmtree(os.path.join(self.output_dir, file))
shutil.copytree(
os.path.join(self.override_folder, file),
os.path.join(self.output_dir, file),
)
self.log("Successfully extracted overrides", "info")
mods_folder = os.path.join(self.output_dir, "mods")
try:
os.makedirs(mods_folder)
except FileExistsError:
shutil.rmtree(mods_folder)
os.makedirs(mods_folder)
mods_folder = self.output_dir
self.log("Downloading mods to %s" % mods_folder, "info")
# Adjust the progress bar(s)
self.progressbar.setValue(0)
self.progressbar.setMaximum(len(self.manifest))
self.sec_progressbar.setValue(0)
for i, mod_ in enumerate(self.manifest):
mod = self.c.addon(mod_["projectID"])
self.log("Downloading mod %s out of %s" % (i, len(self.manifest)), "info")
self.log("Mod name: %s" % mod.name, "info")
self.log("Mod url: %s" % mod.url, "info")
self.log("Mod author(s): %s" % str(mod.authors), "info")
if mod_["required"]:
self.log("Mod is required", "info")
file = mod.file(mod_["fileID"])
save_path = os.path.join(
mods_folder, unquote(file.download_url.split("/")[-1])
)
self.download_raw(file.download_url, save_path, self.sec_progressbar)
else:
self.log("Mod is optional", "info")
if self.download_optional:
file = mod.file(mod_["fileID"])
save_path = os.path.join(
mods_folder, unquote(file.download_url.split["/"][-1])
)
self.download_raw(
file.download_url, save_path, self.sec_progressbar
)
self.sec_progressbar.setValue(0)
self.step(self.progressbar, 1)
self.secondry_log("%s" % mod.name)
stop = now()
self.log(
"Successfully installed ModPack in %s seconds" % str(stop - start), "info"
)
self.clean()
def download_raw(self, link: str, path: str, pbar: QProgressBar):
if not self.ini:
raise Exception("ModPack not initialized")
r = requests.get(link, stream=True)
with open(path, "wb") as f:
self.log("LINK: %s" % link, "debug")
self.log("PATH: %s" % path, "debug")
self.log("HEADERS: %s" % r.headers, "debug")
total_length = int(r.headers.get("content-length"))
self.log("TOTAL LENGTH: %s" % total_length, "debug")
for chunk in progress.bar(
r.iter_content(chunk_size=1024), expected_size=(total_length / 1024) + 1
):
if chunk:
f.write(chunk)
f.flush()
self.step(pbar, 1)
self.log(f"Downloaded {link} to %s" % path.replace("\\", "/"), "debug")
def clean(self):
self.log("Cleaning up...", "info")
if self.meth == "ZIP":
shutil.rmtree(self.tempdir, ignore_errors=True)
self.log("Successfully cleaned up", "info")
self.ini = False