Add download video and save playlist support.

.gitignore

@@ -2,3 +2,9 @@
 /temp/
 /main.build/
 /main.dist/
+/build/
+/dist/
+/*.egg-info/
+/.idea/
+__pycache__/
+*.py[cod]

PlaylistSaver.spec

@@ -0,0 +1,87 @@
+from pathlib import Path
+import platform
+
+
+project_dir = Path(SPEC).resolve().parent
+
+
+def data_tree(source: Path, destination: str):
+    """Return PyInstaller data tuples while retaining the directory tree."""
+    return [
+        (str(path), str(Path(destination) / path.relative_to(source).parent))
+        for path in source.rglob("*")
+        if path.is_file()
+    ]
+
+
+def bundled_mpv_dir() -> Path:
+    system = platform.system().lower()
+    machine = platform.machine().lower()
+
+    if system == "windows":
+        os_dir = "nt"
+    elif system in {"darwin", "linux"}:
+        os_dir = system
+    else:
+        raise SystemExit(f"Unsupported build platform: {platform.system()}")
+
+    if machine in {"amd64", "x86_64"}:
+        arch_dir = "x64"
+    elif machine in {"arm64", "aarch64"}:
+        arch_dir = "arm"
+    elif machine in {"x86", "i386", "i686"}:
+        arch_dir = "x86"
+    else:
+        raise SystemExit(f"Unsupported build architecture: {platform.machine()}")
+
+    return project_dir / "bin" / "mpv" / os_dir / arch_dir
+
+
+mpv_dir = bundled_mpv_dir()
+if not mpv_dir.is_dir():
+    raise SystemExit(f"Bundled mpv directory does not exist: {mpv_dir}")
+
+datas = data_tree(project_dir / "assets", "assets")
+datas += data_tree(
+    mpv_dir,
+    str(Path("bin") / "mpv" / mpv_dir.parent.name / mpv_dir.name),
+)
+
+a = Analysis(
+    [str(project_dir / "main.py")],
+    pathex=[str(project_dir)],
+    binaries=[],
+    datas=datas,
+    hiddenimports=[],
+    hookspath=[],
+    hooksconfig={},
+    runtime_hooks=[],
+    excludes=["customtkinter", "PIL"],
+    noarchive=False,
+    optimize=1,
+)
+pyz = PYZ(a.pure)
+
+exe = EXE(
+    pyz,
+    a.scripts,
+    [],
+    exclude_binaries=True,
+    name="PlaylistSaver",
+    debug=False,
+    bootloader_ignore_signals=False,
+    strip=False,
+    upx=False,
+    console=False,
+    icon=str(project_dir / "assets" / "icon.ico"),
+)
+
+coll = COLLECT(
+    exe,
+    a.binaries,
+    a.datas,
+    strip=False,
+    upx=False,
+    name="PlaylistSaver",
+)
+

PlaylistSaverHelper/background.js

@@ -1,34 +1,127 @@
+function bytesToBase64Url(bytes) {
+    let binary = "";
+    for (let offset = 0; offset < bytes.length; offset += 8192) {
+        binary += String.fromCharCode(...bytes.subarray(offset, offset + 8192));
+    }
+    return btoa(binary).replaceAll("+", "-").replaceAll("/", "_").replace(/=+$/, "");
+}
+
+function base64UrlToBytes(value) {
+    const padded = value.replaceAll("-", "+").replaceAll("_", "/")
+        + "=".repeat((4 - value.length % 4) % 4);
+    return Uint8Array.from(atob(padded), character => character.charCodeAt(0));
+}
+
+async function hmacSha256(keyBytes, data) {
+    const key = await crypto.subtle.importKey(
+        "raw", keyBytes, { name: "HMAC", hash: "SHA-256" }, false, ["sign"]
+    );
+    return new Uint8Array(await crypto.subtle.sign("HMAC", key, data));
+}
+
+function joinBytes(...arrays) {
+    const result = new Uint8Array(arrays.reduce((size, array) => size + array.length, 0));
+    let offset = 0;
+    for (const array of arrays) {
+        result.set(array, offset);
+        offset += array.length;
+    }
+    return result;
+}
+
+async function encryptCookies(plaintext, secretKey) {
+    const masterKey = base64UrlToBytes(secretKey);
+    if (masterKey.length !== 32) {
+        throw new Error("The Helper secret key is invalid.");
+    }
+
+    const encoder = new TextEncoder();
+    const encryptionKey = await hmacSha256(masterKey, encoder.encode("PlaylistSaver cookie encryption"));
+    const authenticationKey = await hmacSha256(masterKey, encoder.encode("PlaylistSaver cookie authentication"));
+    const nonce = crypto.getRandomValues(new Uint8Array(16));
+    const plaintextBytes = encoder.encode(plaintext);
+    const ciphertext = new Uint8Array(plaintextBytes.length);
+
+    for (let offset = 0; offset < plaintextBytes.length; offset += 32) {
+        const counter = new Uint8Array(4);
+        new DataView(counter.buffer).setUint32(0, offset / 32, false);
+        const stream = await hmacSha256(encryptionKey, joinBytes(nonce, counter));
+        const blockLength = Math.min(32, plaintextBytes.length - offset);
+        for (let index = 0; index < blockLength; index++) {
+            ciphertext[offset + index] = plaintextBytes[offset + index] ^ stream[index];
+        }
+    }
+
+    const signedData = joinBytes(Uint8Array.of(1), nonce, ciphertext);
+    const tag = await hmacSha256(authenticationKey, signedData);
+    return bytesToBase64Url(joinBytes(signedData, tag));
+}
+
+async function launchPlaylistSaver() {
+    const { secretKey } = await chrome.storage.local.get("secretKey");
+    if (!secretKey) {
+        await chrome.storage.local.set({ showMissingKeyAlert: true });
+        await chrome.runtime.openOptionsPage();
+        return;
+    }
+
+    const cookies = await chrome.cookies.getAll({ domain: ".youtube.com" });
+    let output = "# Netscape HTTP Cookie File\n";
+    for (const cookie of cookies) {
+        const rawDomain = cookie.domain;
+        const domain = cookie.httpOnly ? `#HttpOnly_${rawDomain}` : rawDomain;
+        output += [
+            domain,
+            rawDomain.startsWith(".") ? "TRUE" : "FALSE",
+            cookie.path,
+            cookie.secure ? "TRUE" : "FALSE",
+            cookie.expirationDate ? Math.floor(cookie.expirationDate) : 0,
+            cookie.name,
+            cookie.value
+        ].join("\t") + "\n";
+    }
+
+    const encrypted = await encryptCookies(output, secretKey.trim());
+    const tabs = await chrome.tabs.query({ active: true, currentWindow: true });
+    if (!tabs[0]?.id) {
+        throw new Error("No active tab is available to launch PlaylistSaver.");
+    }
+    await chrome.tabs.update(tabs[0].id, {
+        url: `playlistsaver://open?encryptedcookies=${encrypted}`
+    });
+}
+
+async function openHelperSettings() {
+    await chrome.runtime.openOptionsPage();
+}
+
 chrome.commands.onCommand.addListener((command) => {
     if (command === "openPLKey") {
-
-        chrome.cookies.getAll({ domain: ".youtube.com" }, (cookies) => {
-            let output = "# Netscape HTTP Cookie File\n";
-
-            cookies.forEach(c => {
-                const domain = c.domain;
-                const flag = domain.startsWith('.') ? "TRUE" : "FALSE";
-                const path = c.path;
-                const secure = c.secure ? "TRUE" : "FALSE";
-                const expiration = c.expirationDate ? Math.floor(c.expirationDate) : 0;
-
-                output += [
-                    domain,
-                    flag,
-                    path,
-                    secure,
-                    expiration,
-                    c.name,
-                    c.value
-                ].join("\t") + "\n";
-            });
-
-            const encoded = btoa(output);
-
-            chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
-                chrome.tabs.update(tabs[0].id, {
-                    url: `PlaylistSaver://open?base64cookies=${encoded}`
-                });
-            });
-        });
+        launchPlaylistSaver().catch(error => console.error("Unable to launch PlaylistSaver:", error));
+    } else if (command === "openPLSettingPageKey") {
+        openHelperSettings().catch(error => console.error("Unable to open Helper settings:", error));
     }
-});
+});
+
+chrome.runtime.onInstalled.addListener(() => {
+    chrome.contextMenus.removeAll(() => {
+        chrome.contextMenus.create({
+            id: "openPlaylistSaver",
+            title: "Open PlaylistSaver",
+            contexts: ["page"]
+        });
+        chrome.contextMenus.create({
+            id: "openHelperSettings",
+            title: "PlaylistSaver Helper Settings",
+            contexts: ["page"]
+        });
+    });
+});
+
+chrome.contextMenus.onClicked.addListener((info) => {
+    if (info.menuItemId === "openPlaylistSaver") {
+        launchPlaylistSaver().catch(error => console.error("Unable to launch PlaylistSaver:", error));
+    } else if (info.menuItemId === "openHelperSettings") {
+        openHelperSettings().catch(error => console.error("Unable to open Helper settings:", error));
+    }
+});

PlaylistSaverHelper/manifest.json

@@ -4,9 +4,10 @@
   "version": "1.0",
 
   "permissions": [
-  "scripting",
   "activeTab",
-  "cookies"
+  "contextMenus",
+  "cookies",
+  "storage"
 ],
 "host_permissions": [
   "*://*.youtube.com/*"
@@ -16,12 +17,22 @@
     "service_worker": "background.js"
   },
 
+  "options_page": "options.html",
+  "icons": {
+    "128": "icon.png"
+  },
   "commands": {
-    "openPLKey": {
+    "openPLSettingPageKey": {
       "suggested_key": {
         "default": "Alt+Z"
       },
+      "description": "Open settings page"
+    },
+    "openPLKey": {
+      "suggested_key": {
+        "default": "Alt+Y"
+      },
       "description": "Launch PlaylistSaver"
     }
   }
-}
+}

README.md

@@ -1,3 +1,30 @@
 # PlaylistSaver
 
-A tool to save your youtube playlist. **VERY UNSTABLE**
+A tool to save your youtube playlist. **VERY UNSTABLE**
+
+## Development
+
+Create a virtual environment and install the project with its build tools:
+
+```powershell
+python -m venv .venv
+.\.venv\Scripts\python.exe -m pip install -e ".[build]"
+```
+
+Run from source:
+
+```powershell
+.\.venv\Scripts\playlist-saver.exe
+```
+
+## Build
+
+Build the application with PyInstaller:
+
+```powershell
+.\build.ps1 -Clean
+```
+
+The application is written to `dist\PlaylistSaver`. The build includes only the
+bundled mpv files matching the operating system and CPU architecture on which the
+build is performed. Build each target platform on that platform.

app.py

@@ -0,0 +1,390 @@
+# Qt
+import logging
+import os
+import secrets
+import threading
+import webbrowser
+from concurrent.futures import ThreadPoolExecutor
+from pathlib import Path
+
+from PySide6.QtWidgets import QApplication, QMessageBox
+from PySide6.QtCore import QSize
+
+from yt_dlp import YoutubeDL
+
+from constant import PROGRAM_DIR
+from window import PlaylistMainWindow
+from yt_lib import sanitize_filename, fetch_playlists_data, PlaylistFetchException, resolve_video_page_url
+from utils import save_json, read_json
+from pl_lib import messagebox
+
+logger = logging.getLogger(__name__)
+logger.setLevel(logging.INFO)
+
+class PlaylistSaver(QApplication):
+    DEFAULT_PROFILE_NAME = "default"
+    THUMBNAIL_SIZE = QSize(144, 81)
+    mpv_processes = {}
+
+    def __init__(self, work_dir: Path, url_schema=None, cookie_file: str | Path | None = None):
+        super().__init__()
+        self.setApplicationName("PlaylistSaver")
+
+        self.url_schema = url_schema
+        self.cookie_file = Path(cookie_file) if cookie_file else None
+
+        # Path
+        self.work_dir = work_dir
+        self.save_path = Path( self.work_dir, "save")
+        self.temp_path = Path( self.work_dir, "temp")
+        self.profiles_meta_path = Path(self.save_path, "profiles.json")
+        self.profiles_path = Path(self.save_path, "profiles")
+        self.cookie_path = Path(self.profiles_path, self.DEFAULT_PROFILE_NAME, "cookies.txt")
+        self.secret_key_path = Path(self.save_path, "helper-secret.key")
+        self.secret_key = self.load_or_create_secret_key()
+
+        # Profile
+        self.active_profile_name = self.DEFAULT_PROFILE_NAME
+
+        # Data
+        self.playlists: dict[str, list] = {
+            "entries": []
+        }
+
+        self.main_window = PlaylistMainWindow(
+            self
+        )
+
+        # Lock
+        self.fetch_playlist_lock = threading.Lock()
+        self.download_pool = ThreadPoolExecutor(max_workers=4, thread_name_prefix="video-download")
+        self.download_tasks = set()
+        self.download_tasks_lock = threading.Lock()
+        self.download_cancel_event = threading.Event()
+        self.aboutToQuit.connect(lambda: self.download_pool.shutdown(wait=False, cancel_futures=False))
+
+        # flags
+        self.use_custom_cookie_file_path = self.cookie_file is not None
+
+        if self.use_custom_cookie_file_path:
+            cookie_path = self.cookie_file
+
+            if not cookie_path.exists() or not cookie_path.is_file():
+                self.main_window.signals.error.emit(
+                    "Cookie file does not exist or is not a file."
+                )
+            else:
+                self.cookie_path = cookie_path
+
+        self.init()
+        self.main_window.show()
+
+    def init(self):
+        self.initialize_profiles()
+        # Start background thread after root is ready for UI callbacks.
+        self.reload_playlists()
+
+    def reload_playlists(self):
+        self.main_window.loading_label.setText("Loading playlists...")
+
+        threading.Thread(
+            target=fetch_playlists_data,
+            args=(self.url_schema,
+                  self.get_profile_cookie_path(self.active_profile_name),
+                  self.get_ydl_opts(),
+                  self.on_data_ready,
+                  self.work_dir,
+                  self.fetch_playlist_lock,
+                  PROGRAM_DIR / "main.py",
+                  self.secret_key,
+                  ),
+            daemon=True,
+        ).start()
+
+    #
+    # Profile
+    #
+    def load_or_create_secret_key(self):
+        try:
+            if self.secret_key_path.exists():
+                key = self.secret_key_path.read_text(encoding="utf-8").strip()
+                if key:
+                    return key
+
+            self.secret_key_path.parent.mkdir(parents=True, exist_ok=True)
+            key = secrets.token_urlsafe(32)
+            self.secret_key_path.write_text(key, encoding="utf-8")
+            return key
+        except OSError as e:
+            logger.error("Unable to load or create Helper secret key: %s", e)
+            return None
+
+    def initialize_profiles(self):
+        try:
+            self.profiles_path.parent.mkdir(parents=True, exist_ok=True)
+        except Exception as e:
+            logger.error("Unable to create profiles folder:", e)
+            QMessageBox.critical(self.main_window, "Error",
+                                 "Unable to create profiles folder.\n"
+                                 f"At path: {self.profiles_path.as_posix()}\n"
+                                 f"Reason: {e}\n"
+                                 f"Solution: Try to remove profiles folder manually and try again.")
+
+        active_name = self.get_active_profile_name()
+        self.ensure_profile_exists(active_name)
+        self.set_active_profile(active_name)
+
+    def ensure_profile_exists(self, profile_name: str):
+        meta = self.load_profiles_meta()
+        profiles = meta["profiles"]
+
+        if profile_name not in profiles:
+            profiles.append(profile_name)
+            meta["profiles"] = profiles
+            self.save_profiles_meta(meta)
+
+        self.get_profile_dir(profile_name).parent.mkdir(parents=True, exist_ok=True)
+
+    def get_active_profile_name(self):
+        meta = self.load_profiles_meta()
+        self.active_profile_name = meta.get("active_profile", None)
+        return self.active_profile_name
+
+    def load_profiles_meta(self):
+        meta = read_json(self.profiles_meta_path)
+        if not meta:
+            return {
+                "active_profile": self.DEFAULT_PROFILE_NAME,
+                "profiles": [self.DEFAULT_PROFILE_NAME],
+            }
+
+        profiles = meta.get("profiles") or [self.DEFAULT_PROFILE_NAME]
+        active_profile = meta.get("active_profile") or profiles[0]
+
+        if active_profile not in profiles:
+            profiles.insert(0, active_profile)
+
+        return {
+            "active_profile": active_profile,
+            "profiles": profiles,
+        }
+
+    def set_active_profile(self, profile_name: str):
+        meta = self.load_profiles_meta()
+        profiles = meta["profiles"]
+
+        if profile_name not in profiles:
+            profiles.append(profile_name)
+
+        meta["profiles"] = profiles
+        meta["active_profile"] = profile_name
+        self.save_profiles_meta(meta)
+
+        self.active_profile_name = profile_name
+        self.cookie_path = self.get_profile_cookie_path(profile_name)
+        self.cookie_path.parent.mkdir(parents=True, exist_ok=True)
+
+    def save_profiles_meta(self, meta: dict):
+        save_json(meta, self.profiles_meta_path)
+
+    def delete_profile(self, profile_name: str):
+        meta = self.load_profiles_meta()
+
+        if not profile_name in meta["profiles"]:
+            return
+
+        meta["profiles"].remove(profile_name)
+
+        self.save_profiles_meta(meta)
+
+    #
+    # Path
+    #
+    def get_profile_cookie_path(self, profile_name: str):
+        if self.use_custom_cookie_file_path:
+            return self.cookie_file
+
+        return Path(self.get_profile_dir(profile_name), "cookies.txt")
+
+    def get_profile_dir(self, profile_name: str):
+        return Path(self.profiles_path, sanitize_filename(profile_name))
+
+    def get_profile_temp_dir(self, profile_name: str | None = None):
+        profile_name = profile_name or self.active_profile_name
+        return self.temp_path / "profiles" / sanitize_filename(profile_name)
+
+    def get_playlist_cache_path(self, playlist_id: str):
+        safe_id = sanitize_filename(playlist_id or "unknown")
+        return self.get_profile_temp_dir() / "playlists" / f"{safe_id}.json"
+
+    #
+    # PlaylistData
+    #
+    def on_data_ready(self, data, error):
+        if isinstance(error, PlaylistFetchException):
+            self.main_window.signals.playlist_fetch_error.emit(error)
+        if data is None:
+            data = {"entries": []}
+
+        self.playlists["entries"] = data.get("entries", [])
+        self.main_window.signals.playlists_ready.emit(self.playlists)
+
+    def load_playlist_videos(self, playlist_id: str):
+        cache_path = self.get_playlist_cache_path(playlist_id)
+        if os.path.exists(cache_path):
+            return read_json(cache_path)
+        return None
+
+    def fetch_playlist_videos(self, playlist: dict):
+        playlist_id = playlist.get("id")
+        playlist_url = playlist.get("url") or playlist.get("webpage_url")
+
+        if not playlist_url and playlist_id and not str(playlist_id).startswith("VL"):
+            playlist_url = f"https://www.youtube.com/playlist?list={playlist_id}"
+
+        if not playlist_url:
+            raise ValueError("Playlist URL not found.")
+
+        cached_data = self.load_playlist_videos(playlist_id)
+        if cached_data:
+            return cached_data
+
+        opts = self.get_ydl_opts()
+
+        opts.update({"extract_flat": True,
+                     "skip_download": True,
+                     "quiet": True, })
+
+        with self.fetch_playlist_lock:
+            with YoutubeDL(opts) as ydl:
+                data = ydl.extract_info(playlist_url, download=False)
+
+        self.save_playlist_videos(playlist_id, data)
+        return data
+
+    def save_playlist_videos(self, playlist_id: str, data: dict):
+        save_json(data, self.get_playlist_cache_path(playlist_id))
+
+    def get_ydl_opts(self):
+        return {
+            'cookiefile': self.get_profile_cookie_path(self.active_profile_name),
+            'verbose': True,
+            'download': False,
+            'js_runtimes': {"node": {}},
+            'extract_flat': False,
+            'lazy_playlist': False,
+            "ignoreerrors": False
+        }
+
+    def get_download_dir(self, playlist_name: str | None = None):
+        directory = self.temp_path / "downloads"
+        if playlist_name:
+            safe_playlist_name = sanitize_filename(playlist_name).strip(" .") or "Unnamed Playlist"
+            directory = directory / "playlists" / safe_playlist_name
+        directory.mkdir(parents=True, exist_ok=True)
+        return directory
+
+    def _download_video_worker(self, video: dict, playlist_name: str | None = None):
+        video_id = str(video.get("id") or "unknown")
+        video_url = resolve_video_page_url(video, video_id)
+        video_name = sanitize_filename(str(video.get("title") or "Unnamed Video")).strip(" .") or "Unnamed Video"
+        output_base = self.get_download_dir(playlist_name) / f"{video_name}-{sanitize_filename(video_id)}"
+
+        opts = self.get_ydl_opts()
+        opts.update({
+            "download": True,
+            "skip_download": False,
+            "quiet": True,
+            "noplaylist": True,
+            "format": "bv*[ext=mp4]+ba[ext=m4a]/b[ext=mp4]/bv*+ba/b",
+            "merge_output_format": "mp4",
+            "outtmpl": f"{output_base}.%(ext)s",
+            "postprocessors": [{"key": "FFmpegVideoRemuxer", "preferedformat": "mp4"}],
+            "progress_hooks": [self._check_download_cancelled],
+        })
+        with YoutubeDL(opts) as ydl:
+            ydl.download([video_url])
+        return Path(f"{output_base}.mp4")
+
+    def _check_download_cancelled(self, _status):
+        if self.download_cancel_event.is_set():
+            raise RuntimeError("Download cancelled because the application is closing.")
+
+    def _submit_download_task(self, function, *args):
+        future = self.download_pool.submit(function, *args)
+        with self.download_tasks_lock:
+            self.download_tasks.add(future)
+        future.add_done_callback(self._forget_download_task)
+        return future
+
+    def _forget_download_task(self, future):
+        with self.download_tasks_lock:
+            self.download_tasks.discard(future)
+
+    def has_active_download_tasks(self):
+        with self.download_tasks_lock:
+            return any(not future.done() for future in self.download_tasks)
+
+    def cancel_download_tasks(self):
+        self.download_cancel_event.set()
+        with self.download_tasks_lock:
+            for future in self.download_tasks:
+                future.cancel()
+
+    def download_video(self, video: dict, playlist_name: str | None = None,
+                       callback=None, reset_cancel=True):
+        if reset_cancel:
+            self.download_cancel_event.clear()
+        future = self._submit_download_task(self._download_video_worker, video, playlist_name)
+        if callback:
+            future.add_done_callback(
+                lambda result: callback(result, video, playlist_name)
+            )
+        return future
+
+    def download_playlist(self, playlist: dict, playlist_data: dict | None = None,
+                          callback=None, queued_callback=None, producer_callback=None,
+                          reset_cancel=True):
+        def queue_videos():
+            try:
+                data = playlist_data or self.fetch_playlist_videos(playlist)
+                entries = [entry for entry in data.get("entries", []) if entry]
+                if self.download_cancel_event.is_set():
+                    return
+                if queued_callback:
+                    queued_callback(len(entries))
+                title = str(playlist.get("title") or playlist.get("id") or "Unnamed Playlist")
+                for video in entries:
+                    if self.download_cancel_event.is_set():
+                        break
+                    self.download_video(video, title, callback, reset_cancel=False)
+            except Exception as error:
+                if queued_callback:
+                    queued_callback(1)
+                if callback:
+                    callback(error, None, playlist.get("title"))
+            finally:
+                if producer_callback:
+                    producer_callback()
+
+        if reset_cancel:
+            self.download_cancel_event.clear()
+        return self._submit_download_task(queue_videos)
+
+    def download_all_playlists(self, callback=None, queued_callback=None,
+                               producer_callback=None):
+        self.download_cancel_event.clear()
+        for playlist in (item for item in self.playlists.get("entries", []) if item):
+            self.download_playlist(
+                playlist, callback=callback, queued_callback=queued_callback,
+                producer_callback=producer_callback, reset_cancel=False
+            )
+
+    def open_download_folder(self):
+        download_dir = self.temp_path / "downloads"
+
+        if not download_dir.is_dir():
+            messagebox.error(self.main_window, title="Error", message="The download folder does not exist.")
+            return
+
+        webbrowser.open(download_dir.as_posix())

build.ps1

@@ -0,0 +1,40 @@
+[CmdletBinding()]
+param(
+    [switch]$Clean
+)
+
+$ErrorActionPreference = "Stop"
+$ProjectDir = $PSScriptRoot
+$VenvPython = Join-Path $ProjectDir ".venv\Scripts\python.exe"
+$Python = if (Test-Path -LiteralPath $VenvPython) { $VenvPython } else { "python" }
+
+if ($Clean) {
+    $BuildDir = Join-Path $ProjectDir "build"
+    $DistDir = Join-Path $ProjectDir "dist"
+
+    if (Test-Path -LiteralPath $BuildDir) {
+        Remove-Item -LiteralPath $BuildDir -Recurse -Force
+    }
+    if (Test-Path -LiteralPath $DistDir) {
+        Remove-Item -LiteralPath $DistDir -Recurse -Force
+    }
+}
+
+& $Python -c "import PyInstaller" 2>$null
+if ($LASTEXITCODE -ne 0) {
+    throw 'PyInstaller is not installed. Run: .\.venv\Scripts\python.exe -m pip install -e ".[build]"'
+}
+
+Push-Location $ProjectDir
+try {
+    & $Python -m PyInstaller --noconfirm "PlaylistSaver.spec"
+    if ($LASTEXITCODE -ne 0) {
+        throw "PyInstaller exited with code $LASTEXITCODE."
+    }
+}
+finally {
+    Pop-Location
+}
+
+Write-Host "Build completed: $ProjectDir\dist\PlaylistSaver"
+

constant.py

@@ -0,0 +1,5 @@
+from pathlib import Path
+
+VERSION = "0.0.3"
+YT_PLAYLISTS_URL = "https://www.youtube.com/feed/playlists"
+PROGRAM_DIR = Path(__file__).parent

deprecated/main_ctk.py

@@ -1006,7 +1006,7 @@ def main(url_schema, cookie_file: str):
 
                     thumbnail_path = Path(
                         ROOT_DIR,
-                        "temp",
+                        "../temp",
                         "thumbnails",
                         f"thumbnail_{video.id}_{thumbnail_resolution}.jpg"
                     )

dialog.py

@@ -0,0 +1,615 @@
+import logging
+import subprocess
+import threading
+from pathlib import Path
+
+from PySide6.QtCore import Signal, QObject, QTimer
+from PySide6.QtWidgets import (
+    QDialog,
+    QLabel, QPushButton, QProgressDialog,
+    QVBoxLayout, QFrame, QHBoxLayout, QMessageBox, QInputDialog, QScrollArea
+)
+
+from constant import PROGRAM_DIR
+from pl_lib.messagebox import ask_yes_no_with_plain_text
+from utils import find_mpv_path, download_file
+from widgets import VideoItem
+from yt_lib import resolve_video_page_url
+
+
+logger = logging.getLogger("PlayerDialog")
+logger.setLevel(logging.INFO)
+
+
+class DownloadProgressDialog(QProgressDialog):
+    tasks_added = Signal(int)
+    task_finished = Signal(str, bool)
+    producer_finished = Signal()
+
+    def __init__(self, title: str, total: int, parent=None, producers: int = 0):
+        super().__init__("Preparing downloads...", "Hide", 0, total, parent)
+        self.completed_count = 0
+        self.failed_count = 0
+        self.failed_videos = []
+        self.remaining_producers = producers
+        self.summary_shown = False
+        self.setWindowTitle(title)
+        self.setFixedWidth(540)
+        self.setMinimumDuration(0)
+        self.setAutoClose(False)
+        self.setAutoReset(False)
+        if total == 0:
+            self.setRange(0, 0)
+        else:
+            self.setValue(0)
+        self.tasks_added.connect(self.add_tasks)
+        self.task_finished.connect(self.update_task)
+        self.producer_finished.connect(self.finish_producer)
+
+        status_label = self.findChild(QLabel)
+        if status_label is not None:
+            status_label.setWordWrap(True)
+            status_label.setMaximumWidth(500)
+        self.show()
+
+    def add_tasks(self, count: int):
+        if self.maximum() == 0:
+            self.setRange(0, count)
+        else:
+            self.setMaximum(self.maximum() + count)
+        self.setValue(self.completed_count)
+        self.setLabelText(f"Downloaded {self.completed_count}/{self.maximum()} videos")
+
+    def finish_future(self, result, video=None, playlist_name=None):
+        video_title = (video or {}).get("title") or "Unknown video"
+        video_id = (video or {}).get("id") or "unknown"
+        display_name = f"{video_title} [{video_id}]"
+        if playlist_name:
+            display_name = f"{playlist_name} / {display_name}"
+        if isinstance(result, Exception):
+            self.task_finished.emit(f"{display_name}\n{result}", False)
+            return
+        try:
+            path = result.result()
+        except Exception as error:
+            self.task_finished.emit(f"{display_name}\n{error}", False)
+            return
+        self.task_finished.emit(path.name, True)
+
+    def update_task(self, message: str, succeeded: bool):
+        self.completed_count += 1
+        if not succeeded:
+            self.failed_count += 1
+            self.failed_videos.append(message)
+        self.setValue(self.completed_count)
+        status = f"Downloaded {self.completed_count}/{self.maximum()} videos"
+        if self.failed_count:
+            status += f" ({self.failed_count} failed)"
+        self.setLabelText(f"{status}\n{message}")
+        self.show_failure_summary_if_finished()
+
+    def finish_producer(self):
+        self.remaining_producers = max(0, self.remaining_producers - 1)
+        self.show_failure_summary_if_finished()
+
+    def show_failure_summary_if_finished(self):
+        if self.summary_shown or self.remaining_producers > 0:
+            return
+        if self.maximum() == 0 or self.completed_count < self.maximum():
+            return
+        self.summary_shown = True
+        if not self.failed_videos:
+            return
+
+        def show_summary():
+            should_close = ask_yes_no_with_plain_text(
+                self.parentWidget(),
+                "Download failures",
+                f"{len(self.failed_videos)} video(s) could not be downloaded. "
+                "Close the download progress window?",
+                "\n\n".join(self.failed_videos),
+            )
+            if should_close:
+                self.hide()
+
+        QTimer.singleShot(0, show_summary)
+
+class PlayerDialog(QDialog):
+    status_changed = Signal(str)
+
+    def __init__(self, app, video: dict, /, parent):
+        QDialog.__init__(self, parent)
+        self.app = app
+        self.parent = parent
+        self.video = video
+        self.video_url = resolve_video_page_url(video)
+        self.process = None
+        self.setWindowTitle(video.get("title", "Video"))
+        self.resize(440, 190)
+
+        self.status_changed.connect(self.set_status)
+
+        self.layout = QVBoxLayout(self)
+        self.layout.setContentsMargins(16, 16, 16, 16)
+        self.layout.setSpacing(10)
+
+        self.title_label = QLabel(video.get("title", "Video"), self)
+        self.title_label.setWordWrap(True)
+
+        self.status_label = QLabel("Launching mpv...", self)
+        self.url_label = QLabel(self.video_url or "", self)
+        self.url_label.setWordWrap(True)
+
+        self.close_btn = QPushButton("Close Player", self)
+        self.close_btn.clicked.connect(self.close)
+
+        self.layout.addWidget(self.title_label)
+        self.layout.addWidget(self.status_label)
+        self.layout.addWidget(self.url_label)
+        self.layout.addWidget(self.close_btn)
+
+        self.setStyleSheet("""
+            QDialog {
+                background-color: #202020;
+            }
+
+            QLabel {
+                background-color: transparent;
+                color: #f0f0f0;
+            }
+
+            QPushButton {
+                background-color: #3a3a3a;
+                color: #f0f0f0;
+                border: 1px solid #505050;
+                border-radius: 6px;
+                padding: 7px 10px;
+            }
+
+            QPushButton:hover {
+                background-color: #464646;
+            }
+        """)
+
+        threading.Thread(target=self.run_mpv, daemon=True).start()
+
+    def set_status(self, message: str):
+        self.status_label.setText(message)
+
+    def run_mpv(self):
+        mpv_path = find_mpv_path(PROGRAM_DIR)
+        if not mpv_path:
+            self.status_changed.emit("mpv not found in bin/ or PATH.")
+            return
+
+        try:
+            self.process = subprocess.Popen(
+                [
+                    mpv_path,
+                    # "--force-window=immediate",
+                    "--focus-on=open",
+                    self.video_url,
+                ],
+                stdout=subprocess.DEVNULL,
+                stderr=subprocess.DEVNULL,
+                creationflags=getattr(subprocess, "CREATE_NO_WINDOW", 0),
+            )
+        except Exception as e:
+            logger.error("Unable to start mpv: %s", e)
+            self.status_changed.emit(f"Unable to start mpv: {e}")
+            return
+
+        self.app.mpv_processes[self] = self.process
+        self.status_changed.emit("Playing in mpv...")
+        self.process.wait()
+        self.app.mpv_processes.pop(self, None)
+        self.status_changed.emit("Playback finished.")
+
+    def closeEvent(self, event):
+        process = self.app.mpv_processes.pop(self, None)
+        if process and process.poll() is None:
+            process.terminate()
+        event.accept()
+
+
+class SwitchProfileDialog(QDialog):
+    profile_changed = Signal(str)
+
+    def __init__(self, app, /, parent):
+        QDialog.__init__(self, parent)
+        self.app = app
+        self.setWindowTitle("Switch Profile")
+        self.resize(420, 420)
+
+        # Layout
+        self.layout = QVBoxLayout(self)
+        self.layout.setContentsMargins(16, 16, 16, 16)
+        self.layout.setSpacing(12)
+
+        # Items
+        self.current_profile_label = QLabel(f"Current: {self.app.get_active_profile_name()}")
+        self.current_profile_label.setWordWrap(True)
+        self.current_profile_label.setObjectName("currentProfile")
+
+        # Scroll are and frame (for profile item)
+        self.scroll_area = QScrollArea(self)
+        self.scroll_area.setWidgetResizable(True)
+        self.scroll_area.setFrameShape(QFrame.Shape.NoFrame)
+
+        self.list_frame = QFrame(self.scroll_area)
+        self.list_frame.setObjectName("profileList")
+        self.list_layout = QVBoxLayout(self.list_frame)
+        self.list_layout.setContentsMargins(8, 8, 8, 8)
+        self.list_layout.setSpacing(8)
+        self.scroll_area.setWidget(self.list_frame)
+
+        self.create_profile_btn = QPushButton("Create Profile")
+        self.create_profile_btn.setMinimumHeight(34)
+        self.create_profile_btn.clicked.connect(self.create_profile)
+
+        self.layout.addWidget(self.current_profile_label)
+        self.layout.addWidget(self.scroll_area, 1)
+        self.layout.addWidget(self.create_profile_btn)
+
+        self.render_profiles()
+
+        self.setStyleSheet("""
+            QDialog {
+                background-color: #202020;
+            }
+
+            QScrollArea, #profileList {
+                background-color: #242424;
+            }
+
+            #currentProfile {
+                background-color: transparent;
+                color: #f0f0f0;
+                font-weight: 600;
+                padding-bottom: 4px;
+            }
+
+            QFrame#profileRow {
+                background-color: #2b2b2b;
+                border: 1px solid #3c3c3c;
+                border-radius: 8px;
+            }
+
+            QLabel {
+                background-color: transparent;
+                color: #f0f0f0;
+            }
+
+            QPushButton {
+                background-color: #3a3a3a;
+                color: #f0f0f0;
+                border: 1px solid #505050;
+                border-radius: 6px;
+                padding: 7px 10px;
+            }
+
+            QPushButton:hover {
+                background-color: #464646;
+            }
+
+            QPushButton:disabled {
+                color: #999999;
+                background-color: #303030;
+            }
+        """)
+
+    def clear_profiles(self):
+        while self.list_layout.count():
+            item = self.list_layout.takeAt(0)
+            widget = item.widget()
+            if widget:
+                widget.deleteLater()
+
+    class ProfileRow(QFrame):
+        def __init__(self, parent, profile_name: str, active_profile: str,
+                     switch_profile, delete_profile):
+            QFrame.__init__(self, parent)
+            self.setObjectName("profileRow")
+
+            self.row_layout = QHBoxLayout(self)
+            self.row_layout.setContentsMargins(10, 8, 10, 8)
+            self.row_layout.setSpacing(8)
+
+            self.name_label = QLabel(profile_name)
+            self.name_label.setWordWrap(True)
+
+            self.switch_btn = QPushButton("Current" if profile_name == active_profile else "Switch")
+            self.switch_btn.setMinimumWidth(88)
+            self.switch_btn.setEnabled(profile_name != active_profile)
+            self.switch_btn.clicked.connect(lambda _checked=False, name=profile_name: switch_profile(name))
+
+            self.delete_btn = QPushButton("Delete")
+            self.delete_btn.setMinimumWidth(88)
+            self.delete_btn.setDisabled(profile_name == "Default")
+            self.delete_btn.clicked.connect(lambda _checked=False, name=profile_name: delete_profile(name))
+
+            self.row_layout.addWidget(self.name_label, 1)
+            self.row_layout.addWidget(self.switch_btn)
+            self.row_layout.addWidget(self.delete_btn)
+
+    def render_profiles(self):
+        self.clear_profiles()
+
+        meta = self.app.load_profiles_meta()
+        active_profile = meta["active_profile"]
+
+        for profile_name in meta["profiles"]:
+            row = self.ProfileRow(self, profile_name, active_profile, self.switch_profile, self.delete_profile)
+            self.list_layout.addWidget(row)
+
+        self.list_layout.addStretch(1)
+
+    def switch_profile(self, profile_name: str):
+        self.profile_changed.emit(profile_name)
+        self.accept()
+
+    def delete_profile(self, profile_name: str):
+        meta = self.app.load_profiles_meta()
+
+        if profile_name == meta["active_profile"]:
+            QMessageBox.critical(self, "Error", "Cannot delete the active profile.")
+            return
+
+        if profile_name == self.app.DEFAULT_PROFILE_NAME:
+            QMessageBox.critical(self, "Error", "Cannot delete the default profile.")
+            return
+
+        reply = QMessageBox.question(
+            self,
+            "Delete Profile",
+            f"Delete profile '{profile_name}'?",
+            QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
+            QMessageBox.StandardButton.No,
+        )
+
+        if reply != QMessageBox.StandardButton.Yes:
+            return
+
+        meta["profiles"] = [
+            name for name in meta["profiles"]
+            if name != profile_name
+        ]
+
+        self.app.save_profiles_meta(meta)
+        self.render_profiles()
+
+    def create_profile(self):
+        profile_name, ok = QInputDialog.getText(self, "Create Profile", "Profile name:")
+
+        if not ok:
+            return
+
+        profile_name = profile_name.strip()
+        if not profile_name:
+            QMessageBox.critical(self, "Error", "Profile name cannot be empty.")
+            return
+
+        self.app.ensure_profile_exists(profile_name)
+        self.render_profiles()
+
+
+class PlaylistWindow(QDialog):
+    class LoadSignals(QObject):
+        playlist_ready = Signal(dict)
+        error = Signal(str)
+        download_status = Signal(str)
+
+    def __init__(self, app, playlist: dict, /, parent=None,
+                 open_player_callback=None):
+        QDialog.__init__(self, parent)
+        self.app = app
+        self.playlist = playlist
+        self.setWindowTitle(playlist.get("title", "Playlist"))
+        self.resize(760, 640)
+        self.signals = self.LoadSignals()
+        self.signals.playlist_ready.connect(self.render_videos)
+        self.signals.error.connect(self.show_error)
+
+        self.open_player_callback = open_player_callback
+
+        # Layout
+        self.layout = QVBoxLayout(self)
+        self.layout.setContentsMargins(16, 16, 16, 16)
+        self.layout.setSpacing(12)
+
+        self.header_label = QLabel(playlist.get("title", "Playlist"), self)
+        self.header_label.setObjectName("playlistTitle")
+        self.header_label.setWordWrap(True)
+
+        self.info_label = QLabel("Loading playlist videos...", self)
+        self.info_label.setObjectName("playlistInfo")
+        self.signals.download_status.connect(self.info_label.setText)
+
+        self.content_layout = QHBoxLayout()
+        self.content_layout.setSpacing(12)
+
+        # Scroll area and frame for video items
+        self.scroll_area = QScrollArea(self)
+        self.scroll_area.setWidgetResizable(True)
+        self.scroll_area.setFrameShape(QFrame.Shape.NoFrame)
+
+        self.list_frame = QFrame(self.scroll_area)
+        self.list_frame.setObjectName("playlistFrame")
+        self.list_layout = QVBoxLayout(self.list_frame)
+        self.list_layout.setContentsMargins(8, 8, 8, 8)
+        self.list_layout.setSpacing(8)
+        self.scroll_area.setWidget(self.list_frame)
+
+        self.control_panel = QFrame(self)
+        self.control_panel.setObjectName("playlistControls")
+        self.control_panel.setFixedWidth(150)
+        self.control_layout = QVBoxLayout(self.control_panel)
+        self.control_layout.setContentsMargins(12, 12, 12, 12)
+        self.control_layout.setSpacing(10)
+
+        self.reload_playlist_btn = QPushButton("Reload")
+        self.save_playlist_btn = QPushButton("Save Playlist")
+        self.reload_playlist_btn.setMinimumHeight(34)
+        self.reload_playlist_btn.clicked.connect(self.render_playlist)
+        self.save_playlist_btn.clicked.connect(self.save_playlist)
+
+        self.control_layout.addWidget(self.reload_playlist_btn)
+        self.control_layout.addWidget(self.save_playlist_btn)
+        self.control_layout.addStretch(1)
+
+        self.content_layout.addWidget(self.scroll_area, 1)
+        self.content_layout.addWidget(self.control_panel)
+
+        self.layout.addWidget(self.header_label)
+        self.layout.addWidget(self.info_label)
+        self.layout.addLayout(self.content_layout, 1)
+
+        self.render_playlist()
+
+        self.setStyleSheet("""
+            QDialog {
+                background-color: #202020;
+            }
+
+            QScrollArea, #playlistFrame {
+                background-color: #242424;
+            }
+
+            #playlistTitle {
+                color: #f0f0f0;
+                font-size: 20px;
+                font-weight: 700;
+            }
+
+            #playlistInfo {
+                color: #a8a8a8;
+            }
+
+            #playlistControls {
+                background-color: #2b2b2b;
+                border: 1px solid #3c3c3c;
+                border-radius: 8px;
+            }
+
+            QLabel {
+                background-color: transparent;
+                color: #f0f0f0;
+            }
+
+            QPushButton {
+                background-color: #3a3a3a;
+                color: #f0f0f0;
+                border: 1px solid #505050;
+                border-radius: 6px;
+                padding: 7px 10px;
+            }
+
+            QPushButton:hover {
+                background-color: #464646;
+            }
+
+            QPushButton:disabled {
+                color: #999999;
+                background-color: #303030;
+            }
+        """)
+
+    def render_playlist(self):
+        self.reload_playlist_btn.setEnabled(False)
+        self.info_label.setText("Loading playlist videos...")
+        self.app.main_window.clear_layout(self.list_layout)
+
+        threading.Thread(target=self.load_playlist_worker, daemon=True).start()
+
+    def load_playlist_worker(self):
+        try:
+            playlist_data = self.app.fetch_playlist_videos(self.playlist)
+        except Exception as e:
+            logger.error("Unable to load playlist videos: %s", e)
+            self.signals.error.emit(str(e))
+            return
+
+        if playlist_data is None:
+            playlist_data = {"entries": []}
+
+        self.signals.playlist_ready.emit(playlist_data)
+
+    def render_videos(self, playlist_data: dict):
+        self.playlist_data = playlist_data
+        self.app.main_window.clear_layout(self.list_layout)
+        self.reload_playlist_btn.setEnabled(True)
+
+        entries = [entry for entry in playlist_data.get("entries", []) if entry is not None]
+        self.info_label.setText(f"{len(entries)} videos")
+
+        if not entries:
+            self.list_layout.addWidget(QLabel("No videos found.", self.list_frame))
+            self.list_layout.addStretch(1)
+            return
+
+        for index, video in enumerate(entries, start=1):
+            thumbnail_path = self.get_video_thumbnail_path(video)
+            item = VideoItem(
+                self.list_frame, video, index, thumbnail_path,
+                thumbnail_size=self.app.THUMBNAIL_SIZE,
+                download_video_callback=lambda _checked=False, current=video: self.download_video(current),
+            )
+            item.clicked.connect(self.open_player_callback)
+            self.list_layout.addWidget(item)
+
+        self.list_layout.addStretch(1)
+
+    def save_playlist(self):
+        data = getattr(self, "playlist_data", None)
+        total = len([entry for entry in data.get("entries", []) if entry]) if data else 0
+        self.progress_dialog = DownloadProgressDialog(
+            "Save Playlist", total, self.app.main_window, producers=1
+        )
+        queued_callback = None if data else self.progress_dialog.tasks_added.emit
+        self.app.download_playlist(
+            self.playlist, data, self.progress_dialog.finish_future, queued_callback,
+            self.progress_dialog.producer_finished.emit,
+        )
+
+    def download_video(self, video: dict):
+        self.progress_dialog = DownloadProgressDialog("Download Video", 1, self.app.main_window)
+        self.app.download_video(video, callback=self.progress_dialog.finish_future)
+
+    def on_download_done(self, result, video=None, playlist_name=None):
+        if isinstance(result, Exception):
+            self.signals.error.emit(f"Download failed: {result}")
+            return
+        try:
+            path = result.result()
+        except Exception as error:
+            self.signals.error.emit(f"Download failed: {error}")
+            return
+        self.signals.download_status.emit(f"Downloaded: {path.name}")
+
+    def show_error(self, message: str):
+        self.reload_playlist_btn.setEnabled(True)
+        self.info_label.setText("Unable to load playlist.")
+        QMessageBox.critical(self, "Error", f"Unable to load playlist: {message}")
+
+    def get_video_thumbnail_path(self, video: dict):
+        thumbnails = video.get("thumbnails") or []
+        if not thumbnails:
+            return None
+
+        thumbnail = thumbnails[0]
+        thumbnail_url = thumbnail.get("url")
+        if not thumbnail_url:
+            return None
+
+        thumbnail_resolution = thumbnail.get("resolution", "unknown")
+        video_id = video.get("id") or "unknown"
+        thumbnail_path = Path(self.app.temp_path, "thumbnails",
+                              f"thumbnail_{video_id}_{thumbnail_resolution}.jpg")
+
+        if thumbnail_path.exists():
+            return thumbnail_path
+
+        if download_file(thumbnail_url, thumbnail_path):
+            return thumbnail_path
+
+        return None

pl_lib/messagebox.py

@@ -0,0 +1,108 @@
+from PySide6.QtWidgets import QMessageBox, QMainWindow, QWidget, QDialog, QVBoxLayout, QLabel, QPlainTextEdit, \
+    QDialogButtonBox, QSizePolicy
+
+
+def create_messagebox(parent: QWidget | None, title: str, message: str,
+                      icon: QMessageBox.Icon = QMessageBox.Icon.Information,
+                      button: QMessageBox.StandardButton = QMessageBox.StandardButton.Ok) -> QMessageBox:
+    msg = QMessageBox(parent)
+    msg.setWindowTitle(title)
+    msg.setText(message)
+    msg.setIcon(icon)
+    msg.setStandardButtons(button)
+    return msg
+
+
+def error(parent: QWidget | None, title: str, message: str,
+          button: QMessageBox.StandardButton = QMessageBox.StandardButton.Ok) -> None:
+    create_messagebox(
+        parent,
+        title=title,
+        message=message,
+        icon=QMessageBox.Icon.Critical,
+        button=button
+    ).exec()
+
+
+def info(parent: QWidget | None, title: str, message: str,
+         button: QMessageBox.StandardButton = QMessageBox.StandardButton.Ok) -> None:
+    create_messagebox(
+        parent,
+        title=title,
+        message=message,
+        icon=QMessageBox.Icon.Information,
+        button=button
+    ).exec()
+
+
+def warning(parent: QWidget | None, title: str, message: str,
+            button: QMessageBox.StandardButton = QMessageBox.StandardButton.Ok) -> None:
+    create_messagebox(
+        parent,
+        title=title,
+        message=message,
+        icon=QMessageBox.Icon.Warning,
+        button=button
+    ).exec()
+
+
+def error_with_plain_text(
+    parent: QWidget | None,
+    title: str,
+    message: str,
+    content: str,
+) -> None:
+    dialog = QDialog(parent)
+    dialog.setWindowTitle(title)
+    dialog.resize(720, 420)
+
+    layout = QVBoxLayout(dialog)
+
+    label = QLabel(message)
+    label.setWordWrap(True)
+
+    details_box = QPlainTextEdit()
+    details_box.setReadOnly(True)
+    details_box.setPlainText(content)
+    details_box.setSizePolicy(
+        QSizePolicy.Policy.Expanding,
+        QSizePolicy.Policy.Expanding,
+    )
+
+    buttons = QDialogButtonBox(QDialogButtonBox.StandardButton.Ok)
+    buttons.accepted.connect(dialog.accept)
+
+    layout.addWidget(label)
+    layout.addWidget(details_box, 1)
+    layout.addWidget(buttons)
+    dialog.exec()
+
+
+def ask_yes_no_with_plain_text(parent: QWidget | None, title: str, message: str, content: str):
+    dialog = QDialog(parent)
+    dialog.setWindowTitle(title)
+    dialog.resize(720, 420)
+
+    layout = QVBoxLayout(dialog)
+
+    label = QLabel(message)
+    label.setWordWrap(True)
+    label.setWordWrap(True)
+
+    details_box = QPlainTextEdit()
+    details_box.setReadOnly(True)
+    details_box.setPlainText(content)
+    details_box.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding)
+
+    buttons = QDialogButtonBox(
+        QDialogButtonBox.StandardButton.Yes |
+        QDialogButtonBox.StandardButton.No
+    )
+    buttons.button(QDialogButtonBox.StandardButton.Yes).clicked.connect(dialog.accept)
+    buttons.button(QDialogButtonBox.StandardButton.No).clicked.connect(dialog.reject)
+
+    layout.addWidget(label)
+    layout.addWidget(details_box, 1)
+    layout.addWidget(buttons)
+
+    return dialog.exec() == QDialog.DialogCode.Accepted

pl_lib/progress_dialog.py

@@ -0,0 +1,171 @@
+from PySide6.QtCore import Qt, Slot, QTimer
+from PySide6.QtWidgets import (
+    QDialog,
+    QLabel,
+    QProgressBar,
+    QPushButton,
+    QScrollArea,
+    QSizePolicy,
+    QVBoxLayout,
+    QWidget,
+)
+
+
+class ProgressRow(QWidget):
+    def __init__(self, name: str, parent=None):
+        super().__init__(parent)
+
+        self.setSizePolicy(
+            QSizePolicy.Policy.Expanding,
+            QSizePolicy.Policy.Fixed,
+        )
+
+        self.name_label = QLabel(name, self)
+        self.name_label.setWordWrap(True)
+        self.name_label.setTextInteractionFlags(
+            Qt.TextInteractionFlag.TextSelectableByMouse
+        )
+
+        self.status_label = QLabel("Preparing...", self)
+        self.status_label.setWordWrap(True)
+        self.status_label.setTextInteractionFlags(
+            Qt.TextInteractionFlag.TextSelectableByMouse
+        )
+
+        self.progress_bar = QProgressBar(self)
+        self.progress_bar.setRange(0, 100)
+        self.progress_bar.setValue(0)
+
+        # Flags
+        self.finished = False
+
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(8, 8, 8, 8)
+        layout.setSpacing(4)
+        layout.addWidget(self.name_label)
+        layout.addWidget(self.status_label)
+        layout.addWidget(self.progress_bar)
+
+
+class ProgressDialog(QDialog):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+
+        self.setWindowTitle("Downloads")
+        self.resize(500, 300)
+        self.setMinimumSize(360, 220)
+
+        self.rows: dict[str, ProgressRow] = {}
+
+        self.scroll_area = QScrollArea(self)
+        self.download_widget = QWidget(self.scroll_area)
+        self.download_layout = QVBoxLayout(self.download_widget)
+        self.download_layout.setContentsMargins(4, 4, 4, 4)
+        self.download_layout.setSpacing(8)
+        self.download_layout.setAlignment(Qt.AlignmentFlag.AlignTop)
+
+        self.scroll_area.setWidget(self.download_widget)
+        self.scroll_area.setWidgetResizable(True)
+        self.scroll_area.setHorizontalScrollBarPolicy(
+            Qt.ScrollBarPolicy.ScrollBarAlwaysOff
+        )
+
+        self.close_button = QPushButton("Close", self)
+        self.close_button.clicked.connect(self.hide)
+
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(8, 8, 8, 8)
+        layout.setSpacing(8)
+        layout.addWidget(self.scroll_area, 1)
+        layout.addWidget(
+            self.close_button,
+            0,
+            Qt.AlignmentFlag.AlignRight,
+        )
+
+        self.close_timer = QTimer(self)
+        self.close_timer.setSingleShot(True)
+        self.close_timer.timeout.connect(self.cleanup)
+
+    @Slot(str, str)
+    def add_task(self, task_id: str, name: str):
+        # Prevent new tasks from being deleted by cleanup timer
+        if task_id in self.rows:
+            return
+
+        row = ProgressRow(name, self.download_widget)
+        self.rows[task_id] = row
+
+        self.download_layout.addWidget(row)
+
+        if not self.isVisible():
+            self.show()
+
+    @Slot(str, str, float)
+    def update_task(
+        self,
+        task_id: str,
+        status: str,
+        percent: float,
+    ):
+        row = self.rows.get(task_id)
+        if row is None:
+            # Prevent started、progress missing due to timing issues
+            self.add_task(task_id, task_id)
+            row = self.rows[task_id]
+
+        value = max(0, min(100, round(percent)))
+        row.status_label.setText(status)
+        row.progress_bar.setValue(value)
+
+    @Slot(str)
+    def finish_task(self, task_id: str):
+        row = self.rows.get(task_id)
+        if row is None:
+            return
+
+        row.status_label.setText("Completed")
+        row.progress_bar.setValue(100)
+        row.finished = True
+
+        if self.all_tasks_finished():
+            self.close_timer.start(600)
+
+    def all_tasks_finished(self):
+        return bool(self.rows) and all(
+            row.finished
+            for row in self.rows.values()
+        )
+
+    def cleanup(self):
+        """
+        If you want to use this function with a timer. use self.close_timer.start(TIMEOUT)
+        :return:
+        """
+        for task_id in list(self.rows):
+            self.remove_task(task_id)
+
+        self.hide()
+
+    @Slot(str, str)
+    def fail_task(self, task_id: str, error: str):
+        row = self.rows.get(task_id)
+        if row is None:
+            self.add_task(task_id, task_id)
+            row = self.rows[task_id]
+
+        row.status_label.setText(f"Failed: {error}")
+        row.progress_bar.setStyleSheet(
+            "QProgressBar::chunk { background-color: #c62828; }"
+        )
+        # Move to top
+        self.download_layout.removeWidget(row)
+        self.download_layout.insertWidget(0, row)
+
+    @Slot(str)
+    def remove_task(self, task_id: str):
+        row = self.rows.pop(task_id, None)
+        if row is not None:
+            self.download_layout.removeWidget(row)
+            row.setParent(None)
+            row.deleteLater()

pyproject.toml

@@ -0,0 +1,46 @@
+[build-system]
+requires = ["setuptools>=77"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "playlist-saver"
+dynamic = ["version"]
+description = "A desktop tool for saving YouTube playlists."
+readme = "README.md"
+requires-python = ">=3.10"
+license = "MIT"
+dependencies = [
+    "click>=8.1",
+    "platformdirs>=4.0",
+    "PySide6>=6.8",
+    "requests>=2.31",
+    "yt-dlp>=2025.1.15",
+]
+
+[project.optional-dependencies]
+build = [
+    "pyinstaller>=6.11",
+]
+
+[project.scripts]
+playlist-saver = "main:main"
+
+[tool.setuptools]
+py-modules = [
+    "app",
+    "constant",
+    "dialog",
+    "main",
+    "utils",
+    "widgets",
+    "window",
+    "yt_lib",
+]
+
+[tool.setuptools.packages.find]
+include = ["pl_lib*"]
+namespaces = true
+
+[tool.setuptools.dynamic]
+version = {attr = "constant.VERSION"}
+

utils.py

@@ -1,15 +1,20 @@
 import base64
 import binascii
+import hashlib
+import hmac
 import json
 import platform
 import shutil
 import urllib
-import winreg
+try:
+    import winreg
+except ImportError:  # Windows-only standard library module
+    winreg = None
 from pathlib import Path
-from urllib.parse import unquote
 import sys
 import os
 import logging
+import requests
 
 logger = logging.getLogger("PlaylistSaver.Utils")
 logger.setLevel(logging.INFO)
@@ -20,6 +25,9 @@ def set_info(target_logger):
     logger = target_logger
 
 def key_exists(hive, sub_key):
+    if winreg is None:
+        return False
+
     try:
         # Attempt to open the key for reading
         with winreg.OpenKey(hive, sub_key, 0, winreg.KEY_READ) as key:
@@ -42,9 +50,9 @@ def create_url_scheme(main_file_path, work_dir):
         command_key = winreg.CreateKey(open_key, "command")
 
         if getattr(sys, 'frozen', False):
-            command = f"\"{sys.executable}\" --new-work-dir \"{work_dir}\" \"%1\""
+            command = f"\"{sys.executable}\" --work-dir \"{work_dir}\" \"%1\""
         else:
-            command = f"\"{sys.executable}\" \"{main_file_path}\" --new-work-dir \"{work_dir}\" \"%1\""
+            command = f"\"{sys.executable}\" \"{main_file_path}\" --work-dir \"{work_dir}\" \"%1\""
 
         winreg.SetValueEx(command_key, None, 0, winreg.REG_SZ, command)
 
@@ -53,12 +61,15 @@ def create_url_scheme(main_file_path, work_dir):
     except OSError as e:
         logger.error("Unable to create URL scheme: %s", e)
 
-def check_url_scheme(main_file_path, work_dir):
+def check_url_scheme(executable_path, work_dir):
+    if winreg is None:
+        return
+
     try:
-        if not key_exists(winreg.HKEY_LOCAL_MACHINE, "PlaylistSaver"):
-            create_url_scheme(main_file_path, work_dir)
+        if not key_exists(winreg.HKEY_CURRENT_USER, r"Software\Classes\PlaylistSaver"):
+            create_url_scheme(executable_path, work_dir)
     except FileNotFoundError:
-        create_url_scheme(main_file_path, work_dir)
+        create_url_scheme(executable_path, work_dir)
 
 def read_cookies(cookie_path):
     try:
@@ -84,19 +95,54 @@ def save_base64_netscape_cookie(cookies_encoded, cookie_path):
         logger.error("Unable to decode base64 cookie: %s", cookies_encoded)
         return
 
-    logger.debug("==== COOKIE FILE ====")
-    for line in cookies.split("\n"):
-        print(line, "=>", len(line.split("\t")))
-    logger.debug("=====================")
-
     save_cookies(cookies, cookie_path)
 
-def parser_url_scheme(url, cookie_path: Path):
+def _decode_urlsafe(value: str) -> bytes:
+    return base64.urlsafe_b64decode(value + "=" * (-len(value) % 4))
+
+
+def decrypt_cookie_payload(payload: str, secret_key: str) -> str:
+    raw = _decode_urlsafe(payload)
+    if len(raw) < 49 or raw[0] != 1:
+        raise ValueError("Unsupported encrypted cookie payload.")
+
+    master_key = _decode_urlsafe(secret_key)
+    if len(master_key) != 32:
+        raise ValueError("Invalid PlaylistSaver secret key.")
+
+    signed_data, supplied_tag = raw[:-32], raw[-32:]
+    nonce, ciphertext = raw[1:17], raw[17:-32]
+    encryption_key = hmac.new(master_key, b"PlaylistSaver cookie encryption", hashlib.sha256).digest()
+    authentication_key = hmac.new(master_key, b"PlaylistSaver cookie authentication", hashlib.sha256).digest()
+    expected_tag = hmac.new(authentication_key, signed_data, hashlib.sha256).digest()
+    if not hmac.compare_digest(supplied_tag, expected_tag):
+        raise ValueError("Cookie payload authentication failed. Check the Helper secret key.")
+
+    plaintext = bytearray(len(ciphertext))
+    for offset in range(0, len(ciphertext), 32):
+        counter = (offset // 32).to_bytes(4, "big")
+        stream = hmac.new(encryption_key, nonce + counter, hashlib.sha256).digest()
+        block = ciphertext[offset:offset + 32]
+        plaintext[offset:offset + len(block)] = bytes(a ^ b for a, b in zip(block, stream))
+
+    return plaintext.decode("utf-8")
+
+
+def parser_url_scheme(url, cookie_path: Path, secret_key: str | None = None):
     logger.debug("Parsing URL scheme: %s", url)
 
-    url = urllib.parse.urlparse(unquote(url))
+    # parse_qs performs percent-decoding itself. Decoding the whole URL first
+    # would turn an encoded Base64 "+" into a query-string space.
+    url = urllib.parse.urlparse(url)
     parameters = urllib.parse.parse_qs(url.query)
 
+    if "encryptedcookies" in parameters:
+        if not secret_key:
+            raise ValueError("PlaylistSaver secret key is unavailable.")
+        cookies = decrypt_cookie_payload(parameters["encryptedcookies"][0], secret_key)
+        save_cookies(cookies, cookie_path)
+        return
+
     func_map = {
         "base64cookies": {
             "func": save_base64_netscape_cookie,
@@ -133,27 +179,33 @@ def find_mpv_path(program_dir: Path):
     platform_name = platform.system().lower()
     machine = platform.machine().lower()
 
-    if platform.system().lower() == "windows"  and ("amd64" in machine or "x86_64" in machine):
+    if platform_name == "windows"  and ("amd64" in machine or "x86_64" in machine):
         local_candidates.append(Path(program_dir, "bin", "mpv", "nt", "x64", "mpv.exe"))
-    elif platform.system().lower() == "windows" and ("arm64" in machine or "aarch64" in machine):
+    elif platform_name == "windows" and ("arm64" in machine or "aarch64" in machine):
         local_candidates.append(Path(program_dir, "bin", "mpv", "nt", "arm", "mpv.exe"))
-    elif platform.system().lower() == "windows" and machine in {"x86", "i386", "i686"}:
+    elif platform_name == "windows" and machine in {"x86", "i386", "i686"}:
         local_candidates.append(Path(program_dir, "bin", "mpv", "nt", "x86", "mpv.exe"))
 
-    if platform.system().lower() == "darwin" and ("amd64" in machine or "x86_64" in machine):
+    if platform_name == "darwin" and ("amd64" in machine or "x86_64" in machine):
         local_candidates.append(Path(program_dir, "bin", "mpv", "darwin", "x64", "mpv"))
-    elif platform.system() == "darwin" and ("arm64" in machine or "aarch64" in machine):
+    elif platform_name == "darwin" and ("arm64" in machine or "aarch64" in machine):
         local_candidates.append(Path(program_dir, "bin", "mpv", "darwin", "arm", "mpv"))
 
-    if platform.system().lower() == "linux" and ("amd64" in machine or "x86_64" in machine):
+    if platform_name == "linux" and ("amd64" in machine or "x86_64" in machine):
         local_candidates.append(Path(program_dir, "bin", "mpv", "linux", "x64", "mpv"))
-    elif platform.system().lower() == "linux" and ("arm64" in machine or "aarch64" in machine):
+    elif platform_name == "linux" and ("arm64" in machine or "aarch64" in machine):
         local_candidates.append(Path(program_dir, "bin", "mpv", "linux", "arm", "mpv"))
-    elif platform.system().lower() == "linux" and machine in {"x86", "i386", "i686"}:
-        local_candidates.append(Path(program_dir, "bin", "mpv", "linux", "x86", "mpv.exe"))
+    elif platform_name == "linux" and machine in {"x86", "i386", "i686"}:
+        local_candidates.append(Path(program_dir, "bin", "mpv", "linux", "x86", "mpv"))
 
     for candidate in local_candidates:
         if candidate.exists() and candidate.is_file():
+            if os.name != "nt" and not os.access(candidate, os.X_OK):
+                try:
+                    candidate.chmod(candidate.stat().st_mode | 0o111)
+                except OSError as exc:
+                    logger.warning("Unable to make bundled mpv executable: %s", exc)
+                    continue
             return candidate
 
     # failback to PATH mpv (if available)
@@ -201,4 +253,18 @@ def cookie_string_to_netscape(cookie_str):
             value.strip()
         ]))
 
-    return "\n".join(lines)
+    return "\n".join(lines)
+
+
+def download_file(url, dest: Path):
+    try:
+        dest.parent.mkdir(parents=True, exist_ok=True)
+        with requests.get(url, stream=True, timeout=30) as r:
+            r.raise_for_status()
+            with dest.open(mode="wb") as f:
+                for chunk in r.iter_content(chunk_size=8192):
+                    f.write(chunk)
+        return True
+    except Exception as e:
+        logger.error("Unable to download file: %s", e)
+        return False

widgets.py

@@ -0,0 +1,252 @@
+import datetime
+from pathlib import Path
+from typing import Callable
+
+from PySide6.QtWidgets import QLabel, QFrame, QHBoxLayout, QSizePolicy, QPushButton, QVBoxLayout
+from PySide6.QtCore import Qt, Signal, QSize
+from PySide6.QtGui import QPixmap
+
+from yt_lib import resolve_video_page_url
+
+
+class PlaylistItem(QFrame):
+    clicked = Signal(dict)
+
+    def __init__(self,
+                 parent,
+                 data,
+                 title: str = "",
+                 thumbnail_path: str | Path | None = None,
+                 thumbnail_size: QSize = None):
+        super().__init__(parent)
+        self.setObjectName("playlistItem")
+        self.original_thumbnail = None
+
+        self.layout = QHBoxLayout(self)
+        self.layout.setContentsMargins(12, 10, 12, 10)
+        self.layout.setSpacing(12)
+
+        self.setMinimumHeight(92)
+        self.setMaximumHeight(120)
+        self.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Fixed)
+
+        # item
+        self.title_label = QLabel(title, self)
+        self.title_label.setObjectName("playlistTitle")
+        self.title_label.setWordWrap(True)
+        self.title_label.setAlignment(Qt.AlignmentFlag.AlignVCenter | Qt.AlignmentFlag.AlignLeft)
+        self.title_label.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Preferred)
+
+        self.thumbnail_label = QLabel(self)
+        self.thumbnail_label.setObjectName("thumbnailLabel")
+        self.thumbnail_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        self.thumbnail_label.setFixedSize(thumbnail_size)
+        self.thumbnail_label.setSizePolicy(QSizePolicy.Policy.Fixed, QSizePolicy.Policy.Fixed)
+
+        # bind
+        self.layout.addWidget(self.title_label, 1)
+        self.layout.addWidget(self.thumbnail_label)
+
+        if thumbnail_path:
+            self.set_thumbnail(thumbnail_path)
+
+        self.setStyleSheet("""
+            QFrame#playlistItem {
+                background-color: #2b2b2b;
+                border: 1px solid #3c3c3c;
+                border-radius: 8px;
+            }
+
+            QFrame#playlistItem:hover {
+                background-color: #4f0202;
+                border-color: #555555;
+            }
+
+            QLabel {
+                background-color: transparent;
+                border: none;
+                color: #f0f0f0;
+            }
+
+            #playlistTitle {
+                font-weight: 600;
+            }
+
+            #thumbnailLabel {
+                background-color: #1f1f1f;
+                border: 1px solid #3a3a3a;
+                border-radius: 6px;
+            }
+        """)
+
+        # Playlist data
+        self.data = data
+
+    def set_thumbnail(self, thumbnail_path: str | Path):
+        pixmap = QPixmap(str(thumbnail_path))
+        if pixmap.isNull():
+            self.thumbnail_label.hide()
+            return
+
+        self.original_thumbnail = pixmap
+        self.thumbnail_label.show()
+        self.update_thumbnail_size()
+
+    def update_thumbnail_size(self):
+        if not self.original_thumbnail:
+            return
+
+        scaled = self.original_thumbnail.scaled(
+            self.thumbnail_label.size(),
+            Qt.AspectRatioMode.KeepAspectRatio,
+            Qt.TransformationMode.SmoothTransformation,
+        )
+        self.thumbnail_label.setPixmap(scaled)
+
+    def resizeEvent(self, event):
+        super().resizeEvent(event)
+        self.update_thumbnail_size()
+
+    def mousePressEvent(self, event):
+        if event.button() == Qt.MouseButton.LeftButton:
+            self.clicked.emit(self.data)
+        super().mousePressEvent(event)
+
+
+class VideoItem(QFrame):
+    clicked = Signal(dict)
+
+    def __init__(self, parent, video: dict,
+                 index: int = 0, thumbnail_path: str | Path | None = None,
+                 thumbnail_size: QSize = None,
+                 download_video_callback: Callable = None):
+        super().__init__(parent)
+        self.setObjectName("videoItem")
+        self.original_thumbnail = None
+        self.video = video
+        self.id = video.get("id")
+        self.url = resolve_video_page_url(video)
+
+        title = video.get("title", "Unnamed Video")
+        if index:
+            title = f"{index}. {title}"
+
+        if video.get("duration"):
+            duration = str(datetime.timedelta(seconds=video.get("duration")))
+        else:
+            duration = "Fetching duration..."
+
+        self.layout = QHBoxLayout(self)
+        self.layout.setContentsMargins(12, 10, 12, 10)
+        self.layout.setSpacing(12)
+
+        self.setMinimumHeight(92)
+        self.setMaximumHeight(120)
+        self.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Fixed)
+
+        # item
+        self.title_label = QLabel(title, self)
+        self.title_label.setObjectName("videoTitle")
+        self.title_label.setWordWrap(True)
+        self.title_label.setAlignment(Qt.AlignmentFlag.AlignVCenter | Qt.AlignmentFlag.AlignLeft)
+        self.title_label.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Preferred)
+
+        self.duration_label = QLabel(duration, self)
+        self.duration_label.setObjectName("durationLabel")
+        self.duration_label.setAlignment(Qt.AlignmentFlag.AlignBottom | Qt.AlignmentFlag.AlignLeft)
+
+        self.download_button = QPushButton("Download Video", self)
+        self.download_button.setObjectName("downloadButton")
+
+        self.thumbnail_label = QLabel(self)
+        self.thumbnail_label.setObjectName("thumbnailLabel")
+        self.thumbnail_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        self.thumbnail_label.setFixedSize(thumbnail_size)
+        self.thumbnail_label.setSizePolicy(QSizePolicy.Policy.Fixed, QSizePolicy.Policy.Fixed)
+        self.thumbnail_label.hide()
+
+        # bind
+        self.text_layout = QVBoxLayout()
+        self.text_layout.setContentsMargins(0, 0, 0, 0)
+        self.text_layout.setSpacing(6)
+        self.text_layout.addWidget(self.title_label, 1)
+        self.text_layout.addWidget(self.duration_label)
+        self.text_layout.addWidget(self.download_button, 1,
+                                   Qt.AlignmentFlag.AlignBottom | Qt.AlignmentFlag.AlignLeft)
+
+        self.layout.addLayout(self.text_layout, 1)
+        self.layout.addWidget(self.thumbnail_label)
+
+        if callable(download_video_callback):
+            self.download_button.clicked.connect(download_video_callback)
+
+        if thumbnail_path:
+            self.set_thumbnail(thumbnail_path)
+
+        self.setStyleSheet("""
+            QFrame#videoItem {
+                background-color: #2b2b2b;
+                border: 1px solid #3c3c3c;
+                border-radius: 8px;
+            }
+
+            QFrame#videoItem:hover {
+                background-color: #333333;
+                border-color: #555555;
+            }
+
+            QLabel {
+                background-color: transparent;
+                border: none;
+                color: #f0f0f0;
+            }
+
+            #videoTitle {
+                font-weight: 600;
+            }
+
+            #thumbnailLabel {
+                background-color: #1f1f1f;
+                border: 1px solid #3a3a3a;
+                border-radius: 6px;
+            }
+
+            #downloadButton {
+                max-height: 30px;
+            }
+        """)
+
+        self.setCursor(Qt.CursorShape.PointingHandCursor)
+
+    def set_thumbnail(self, thumbnail_path: str | Path):
+        pixmap = QPixmap(str(thumbnail_path))
+        if pixmap.isNull():
+            self.thumbnail_label.hide()
+            return
+
+        self.original_thumbnail = pixmap
+        self.thumbnail_label.show()
+        self.update_thumbnail_size()
+
+    def update_thumbnail_size(self):
+        if not self.original_thumbnail:
+            return
+
+        scaled = self.original_thumbnail.scaled(
+            self.thumbnail_label.size(),
+            Qt.AspectRatioMode.KeepAspectRatio,
+            Qt.TransformationMode.SmoothTransformation,
+        )
+        self.thumbnail_label.setPixmap(scaled)
+
+    def resizeEvent(self, event):
+        super().resizeEvent(event)
+        self.update_thumbnail_size()
+
+    def mousePressEvent(self, event):
+        if event.button() == Qt.MouseButton.LeftButton:
+            self.clicked.emit(self.video)
+        super().mousePressEvent(event)
+
+    def set_duration(self, duration: str):
+        self.duration_label.setText(duration)

window.py

@@ -0,0 +1,332 @@
+import logging
+import subprocess
+from pathlib import Path
+
+from PySide6.QtWidgets import (
+    QMainWindow, QWidget,
+    QLabel, QPushButton, QFrame, QScrollArea,
+    QVBoxLayout, QHBoxLayout,
+    QMessageBox, QLineEdit, QDialog, QApplication, )
+from PySide6.QtCore import Qt, Signal, QObject
+
+from constant import VERSION
+from dialog import DownloadProgressDialog, PlayerDialog, SwitchProfileDialog, PlaylistWindow
+from utils import download_file
+from widgets import PlaylistItem
+from yt_lib import PlaylistFetchException, resolve_video_page_url
+
+logger = logging.getLogger("MainWindow")
+
+
+class PlaylistMainWindow(QMainWindow):
+    def __init__(self, app):
+        super(PlaylistMainWindow, self).__init__()
+        self.app = app
+        self.child_windows = []
+        self.setWindowTitle("PlaylistSaver")
+        self.resize(700, 800)
+
+        # Central widget
+        self.central_widget = QWidget(self)
+        self.setCentralWidget(self.central_widget)
+
+        # Layouts
+        self.main_layout = QHBoxLayout(self.central_widget)
+        self.main_layout.setContentsMargins(12, 12, 12, 12)
+        self.main_layout.setSpacing(12)
+
+        self.right_layout = QVBoxLayout()
+        self.right_layout.setContentsMargins(12, 12, 12, 12)
+        self.right_layout.setSpacing(10)
+
+        self.playlists_layout = QVBoxLayout()
+        self.playlists_layout.setContentsMargins(10, 10, 10, 10)
+        self.playlists_layout.setSpacing(8)
+
+        # Frame
+        self.playlists_scroll = QScrollArea(self)
+        self.playlists_scroll.setWidgetResizable(True)
+        self.playlists_scroll.setFrameShape(QFrame.Shape.NoFrame)
+
+        self.playlists_frame = QFrame(self.playlists_scroll)
+        self.playlists_frame.setLayout(self.playlists_layout)
+        self.playlists_scroll.setWidget(self.playlists_frame)
+
+        self.playlists_scroll.setMinimumWidth(400)
+
+        self.right_panel = QFrame(self.central_widget)
+        self.right_panel.setObjectName("rightPanel")
+        self.right_panel.setFixedWidth(190)
+        self.right_panel.setLayout(self.right_layout)
+
+        # Items
+        self.profile_label = QLabel(f"Current Profile: {self.app.get_active_profile_name()}" ,)
+        self.profile_label.setObjectName("profileLabel")
+        self.profile_label.setWordWrap(True)
+
+        self.loading_label = QLabel("Loading...")
+        self.loading_label.setObjectName("loadingLabel")
+        self.loading_label.setAlignment(Qt.AlignmentFlag.AlignCenter | Qt.AlignmentFlag.AlignBottom)
+
+        self.switch_profile_btn = QPushButton("Switch Profile")
+        self.helper_key_btn = QPushButton("Helper Secret Key")
+        self.refresh_playlists_btn = QPushButton("Refresh playlists")
+        self.save_all_playlists_btn = QPushButton("Save All Playlists")
+        self.open_download_folder_btn = QPushButton("Open Download Folder")
+        self.switch_profile_btn.setMinimumHeight(34)
+        self.helper_key_btn.setMinimumHeight(34)
+        self.refresh_playlists_btn.setMinimumHeight(34)
+        self.save_all_playlists_btn.setMinimumHeight(34)
+
+        self.version_label = QLabel(f"v{VERSION}")
+        self.version_label.setObjectName("versionLabel")
+
+        self.playlist_items_layout = QVBoxLayout()
+        self.playlist_items_layout.setContentsMargins(0, 0, 0, 0)
+        self.playlist_items_layout.setSpacing(8)
+
+        self.playlists_layout.addLayout(self.playlist_items_layout)
+        self.playlists_layout.addWidget(self.loading_label, 0, Qt.AlignmentFlag.AlignHCenter)
+
+        # Bind item
+        self.left_layout = QVBoxLayout()
+        self.left_layout.setContentsMargins(0, 0, 0, 0)
+        self.left_layout.setSpacing(10)
+        self.left_layout.addWidget(self.playlists_scroll, 1)
+
+        self.right_layout.addWidget(self.profile_label)
+        self.right_layout.addWidget(self.switch_profile_btn)
+        self.right_layout.addWidget(self.helper_key_btn)
+        self.right_layout.addWidget(self.refresh_playlists_btn)
+        self.right_layout.addWidget(self.save_all_playlists_btn)
+        self.right_layout.addWidget(self.open_download_folder_btn)
+        self.right_layout.addStretch(1)
+        self.right_layout.addWidget(self.version_label, 0, Qt.AlignmentFlag.AlignBottom | Qt.AlignmentFlag.AlignHCenter)
+
+        self.main_layout.addLayout(self.left_layout, 1)
+        self.main_layout.addWidget(self.right_panel)
+
+        self.setStyleSheet("""
+            QMainWindow {
+                background-color: #202020;
+            }
+
+            QScrollArea, QFrame {
+                background-color: #242424;
+            }
+
+            QLabel {
+                background-color: transparent;
+            }
+
+            #rightPanel {
+                background-color: #2b2b2b;
+                border: 1px solid #3c3c3c;
+                border-radius: 8px;
+            }
+
+            #profileLabel {
+                color: #f0f0f0;
+                font-weight: 600;
+                padding-bottom: 6px;
+            }
+
+            #loadingLabel {
+                color: #a8a8a8;
+                padding: 4px;
+            }
+
+            QPushButton {
+                background-color: #3a3a3a;
+                color: #f0f0f0;
+                border: 1px solid #505050;
+                border-radius: 6px;
+                padding: 7px 10px;
+            }
+
+            QPushButton:hover {
+                background-color: #464646;
+            }
+
+            QPushButton:pressed {
+                background-color: #303030;
+            }
+        """)
+
+        # Bind signals function
+        self.signals = self.PlaylistWorkerSignals()
+        self.signals.playlists_ready.connect(self.build_ui)
+        self.signals.error.connect(self.show_error)
+        self.signals.playlist_fetch_error.connect(self.show_playlist_fetch_error)
+        self.signals.download_status.connect(self.loading_label.setText)
+
+        self.switch_profile_btn.clicked.connect(self.open_switch_profile_dialog)
+        self.helper_key_btn.clicked.connect(self.show_helper_secret_key)
+        self.refresh_playlists_btn.clicked.connect(self.app.reload_playlists)
+        self.save_all_playlists_btn.clicked.connect(self.save_all_playlists)
+        self.open_download_folder_btn.clicked.connect(self.app.open_download_folder)
+
+    class PlaylistWorkerSignals(QObject):
+        # Signals
+        playlists_ready = Signal(dict)
+        profile_delete = Signal(str)
+
+        # playlist
+        playlist_clicked = Signal(dict)
+        video_clicked = Signal(str)
+
+        # error
+        error = Signal(str)
+        playlist_fetch_error = Signal(object)
+        download_status = Signal(str)
+
+    def build_ui(self, playlists: dict[str, list]):
+        self.clear_layout(self.playlist_items_layout)
+
+        playlists = playlists.get("entries", [])
+
+        playlists = [playlist for playlist in playlists if playlist is not None]  # ignore None item
+
+        for playlist in playlists:
+            plist_id = playlist.get("id", None)
+            title = playlist.get("title", "Title not found")
+
+            item = PlaylistItem(
+                self.playlists_frame,
+                playlist,
+                title=title,
+                thumbnail_size=self.app.THUMBNAIL_SIZE
+            )
+
+            if len(playlist.get("thumbnails", [])) > 0:
+                thumbnail_url = playlist.get("thumbnails", [])[0].get('url', None)
+                thumbnail_resolution = playlist.get("thumbnails", [])[0].get('resolution', None)
+
+                thumbnail_path = Path(self.app.temp_path, "thumbnails",
+                                      f"thumbnail_{plist_id}_{thumbnail_resolution}.jpg")
+
+                result = download_file(thumbnail_url, thumbnail_path)
+
+                if result or (thumbnail_path.exists() and thumbnail_path.is_file()):
+                    item.set_thumbnail(thumbnail_path)
+
+            item.clicked.connect(self.open_playlist_window)
+            self.playlist_items_layout.addWidget(item)
+
+        self.loading_label.setText("Done")
+
+    def save_all_playlists(self):
+        playlists = [item for item in self.app.playlists.get("entries", []) if item]
+        if not playlists:
+            QMessageBox.information(self, "Download", "No playlists loaded.")
+            return
+        self.progress_dialog = DownloadProgressDialog(
+            "Save All Playlists", 0, self, producers=len(playlists)
+        )
+        self.app.download_all_playlists(
+            self.progress_dialog.finish_future,
+            self.progress_dialog.tasks_added.emit,
+            self.progress_dialog.producer_finished.emit,
+        )
+
+    def on_download_done(self, result, video=None, playlist_name=None):
+        if isinstance(result, Exception):
+            self.signals.error.emit(f"Download failed: {result}")
+            return
+        try:
+            path = result.result()
+        except Exception as error:
+            self.signals.error.emit(f"Download failed: {error}")
+            return
+        self.signals.download_status.emit(f"Downloaded: {path.name}")
+
+    def clear_layout(self, layout):
+        while layout.count():
+            item = layout.takeAt(0)
+            child_layout = item.layout()
+            widget = item.widget()
+            if child_layout:
+                self.clear_layout(child_layout)
+            if widget:
+                widget.deleteLater()
+
+    def open_playlist_window(self, playlist: dict):
+        window = PlaylistWindow(self.app, playlist, parent=self,
+                                open_player_callback=self.open_video_player)
+        self.child_windows.append(window)
+
+        window.destroyed.connect(
+            lambda _obj=None, w=window: self.child_windows.remove(w) if w in self.child_windows else None
+        )
+
+        window.show()
+
+    def show_error(self, message: str):
+        QMessageBox.critical(self, "Error", message)
+
+    def show_playlist_fetch_error(self, error: PlaylistFetchException):
+        error.create_messagebox(self)
+
+    def open_video_player(self, video: dict):
+        video_url = resolve_video_page_url(video)
+        if not video_url:
+            QMessageBox.critical(self, "Error", "Unable to resolve video URL.")
+            return
+
+        dialog = PlayerDialog(self.app, video, parent=self)
+        self.child_windows.append(dialog)
+        dialog.destroyed.connect(
+            lambda _obj=None, w=dialog: self.child_windows.remove(w) if w in self.child_windows else None)
+        dialog.show()
+
+    def open_switch_profile_dialog(self):
+        dialog = SwitchProfileDialog(self.app, parent=self)
+        dialog.profile_changed.connect(self.apply_profile_switch)
+        dialog.exec()
+
+    def show_helper_secret_key(self):
+        dialog = QDialog(self)
+        dialog.setWindowTitle("Helper Secret Key")
+        layout = QVBoxLayout(dialog)
+        layout.addWidget(QLabel("Copy this key into the PlaylistSaver Helper settings page:"))
+
+        key_field = QLineEdit(self.app.secret_key or "")
+        key_field.setReadOnly(True)
+        key_field.setEchoMode(QLineEdit.EchoMode.Password)
+        layout.addWidget(key_field)
+
+        buttons = QHBoxLayout()
+        reveal_btn = QPushButton("Show")
+        copy_btn = QPushButton("Copy")
+        close_btn = QPushButton("Close")
+        reveal_btn.clicked.connect(lambda: key_field.setEchoMode(QLineEdit.EchoMode.Normal))
+        copy_btn.clicked.connect(lambda: QApplication.clipboard().setText(key_field.text()))
+        close_btn.clicked.connect(dialog.accept)
+        buttons.addWidget(reveal_btn)
+        buttons.addWidget(copy_btn)
+        buttons.addWidget(close_btn)
+        layout.addLayout(buttons)
+        dialog.resize(540, 140)
+        dialog.exec()
+
+    def apply_profile_switch(self, profile_name: str):
+        self.app.set_active_profile(profile_name)
+        self.profile_label.setText(f"Current Profile: {profile_name}")
+
+    def closeEvent(self, event):
+        if not self.app.has_active_download_tasks():
+            event.accept()
+            return
+
+        answer = QMessageBox.question(
+            self,
+            "Downloads in progress",
+            "Downloads are still running. Close the application and cancel them?",
+            QMessageBox.StandardButton.Yes | QMessageBox.StandardButton.No,
+            QMessageBox.StandardButton.No,
+        )
+        if answer == QMessageBox.StandardButton.Yes:
+            self.app.cancel_download_tasks()
+            event.accept()
+        else:
+            event.ignore()

yt_lib.py

@@ -0,0 +1,169 @@
+import copy
+import logging
+import os
+import threading
+import traceback
+import webbrowser
+from pathlib import Path
+from typing import Callable
+
+from PySide6.QtWidgets import QMessageBox
+from yt_dlp import YoutubeDL
+
+from constant import YT_PLAYLISTS_URL
+from utils import check_url_scheme, parser_url_scheme, find_http_status
+
+logger = logging.getLogger("PLib")
+
+def sanitize_filename(value: str):
+    invalid_chars = '<>:"/\\|?*'
+    return "".join("_" if char in invalid_chars else char for char in value)
+
+
+def fetch_video_details(video_url: str, opts):
+    opts = copy.deepcopy(opts)
+    opts.update({"extract_flat": True, })
+
+    try:
+        with YoutubeDL(opts) as ydl:
+            info = ydl.extract_info(video_url, download=False)
+    except Exception as e:
+        logger.error(f"Unable to fetch video details: {e}\nURL:{video_url}")
+        return None
+
+    return info
+
+
+def resolve_video_page_url(video: dict | None=None, video_id: str=None) -> str:
+    if not video and not video_id:
+        raise Exception("No video id provided")
+
+    if isinstance(video_id, str):
+        return f"https://www.youtube.com/watch?v={video_id}"
+
+    return (
+            video.get("webpage_url")
+            or video.get("url")
+            or (f"https://www.youtube.com/watch?v={video.get('id')}" if video.get("id") else None)
+    )
+
+def fetch_playlists_data(url_schema,
+                         cookie_file_path: Path, opts, callback: Callable,
+                         work_dir: Path, fetch_lock: threading.Lock,
+                         main_filepath: Path, secret_key: str | None = None):
+    check_url_scheme(main_filepath.absolute().as_posix(), work_dir)
+
+    error = None
+
+    if url_schema is not None:
+        try:
+            parser_url_scheme(url_schema, cookie_path=cookie_file_path, secret_key=secret_key)
+        except Exception as e:
+            logger.error("Unable to parse URL scheme: %s", e)
+
+    playlists_data = None
+
+    with fetch_lock:
+        opts = copy.deepcopy(opts)
+        opts.update({
+            'extract_flat': True,
+            'skip_download': True,
+        })
+
+        try:
+            with YoutubeDL(opts) as ydl:
+                playlists_data = ydl.extract_info(YT_PLAYLISTS_URL, download=False)
+        except Exception as e:
+            status_code = find_http_status(e)
+            if status_code == 401:
+                error = "Cookie are expired. Reopen the tool again in browser!", None
+            elif status_code == 403:
+                error = "Server forbidden. Did you logged in?", None
+            elif status_code == 429:
+                error = "Too many requests. Try again later.", None
+            elif status_code == 503:
+                error = "Server unavailable. Try again later.", None
+            elif status_code == 522:
+                error = "Connection timed out.", None
+            else:
+                error = (f"Unexpected error: {e} (Type: {type(e)})\n"
+                         f"Traceback: {traceback.format_exc()}", None)
+
+    if playlists_data is None:
+        logger.error(f"Unable to fetch playlists: {error[0]}")
+        playlists_data = {"entries": []}
+
+    pf_exec = None
+    if error is not None:
+        reason = error[0] if isinstance(error, tuple) else error
+        pf_exec = PlaylistFetchException(
+            url=YT_PLAYLISTS_URL,
+            title="Playlists Fetch Error",
+            reason=reason,
+            enable_option=True,
+            options=[
+                {"label": "Reopen browser",
+                 "action": lambda: webbrowser.open(YT_PLAYLISTS_URL)},
+            ],
+        )
+
+    callback(playlists_data, pf_exec)
+
+
+class PlaylistFetchException(Exception):
+    def __init__(self, url, title, reason, enable_option=False, options=None, no_cancel=False):
+        super().__init__()
+        self.url = url
+        self.title = title
+        self.reason = reason
+        self.qt_options = {
+            "enable": enable_option,
+            "options": options,
+            "noCancelOption": no_cancel,
+        }
+
+    def create_messagebox(self, master):
+        box = QMessageBox(master)
+        box.setWindowTitle(self.title)
+        box.setText(self.reason or self.title)
+        box.setIcon(QMessageBox.Icon.Critical)
+
+        is_custom_option_enabled = self.qt_options["enable"] is True and type(self.qt_options["options"]) is list
+
+        if is_custom_option_enabled:
+            for option in self.qt_options["options"]:
+                label = option.get("label", None)
+                action_func = option.get("action", None)
+                role = option.get("role", QMessageBox.ButtonRole.AcceptRole)
+
+                # Some type check
+                if label is None or (action_func is None or not callable(action_func)):
+                    logger.warning(f"Skipping {option} ({action_func}) because its label or action is not set yet or not callable.")
+                    continue
+
+                if not isinstance(role, QMessageBox.ButtonRole):
+                    logger.warning(f"Skipping {option} ({role}) because its role type is not QMessageBox.ButtonRole.")
+                    continue
+
+                btn = box.addButton(label, role)
+                option["button"] = btn
+
+        if not self.qt_options["noCancelOption"]:
+            box.addButton("Cancel", QMessageBox.ButtonRole.RejectRole)
+        elif not is_custom_option_enabled:
+            box.addButton(QMessageBox.StandardButton.Ok)
+
+        box.exec()
+
+        clicked = box.clickedButton()
+
+        # If the option's button is clicked, Call the target action function
+        if is_custom_option_enabled:
+            for option in self.qt_options["options"]:
+                btn = option.get("button")
+                action_func = option.get("action")
+
+                if clicked == btn:
+                    return action_func()
+
+        return None