Inicial, descargar y conversion basicas

gui/tab_youtube.py

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+import os
+from PyQt6.QtWidgets import (QWidget, QVBoxLayout, QHBoxLayout,QLabel, QLineEdit, QPushButton, QFileDialog, QMessageBox)
+from utils.downloader import VideoDownloader
+
+class YoutubeTab(QWidget):
+    def __init__(self):
+        super().__init__()
+        self.downloader_thread = None
+        self.initUI()
+
+    def initUI(self):
+        layout = QVBoxLayout()
+
+        # Input URL
+        layout.addWidget(QLabel("URL del vídeo:"))
+        self.url_input = QLineEdit()
+        self.url_input.setPlaceholderText("https://www.youtube.com/watch?v=...")
+        layout.addWidget(self.url_input)
+
+        # Input Ruta de destino
+        layout.addWidget(QLabel("Ruta de destino:"))
+        path_layout = QHBoxLayout()
+        self.path_input = QLineEdit()
+        # Carpeta por defecto: Descargas del usuario
+        default_path = os.path.join(os.path.expanduser("~"), "Downloads")
+        self.path_input.setText(default_path)
+        path_layout.addWidget(self.path_input)
+        
+        self.browse_btn = QPushButton("Examinar")
+        self.browse_btn.clicked.connect(self.browse_folder)
+        path_layout.addWidget(self.browse_btn)
+        layout.addLayout(path_layout)
+
+        # Botón de Descarga
+        self.download_btn = QPushButton("Descargar Vídeo MP4")
+        self.download_btn.clicked.connect(self.start_download)
+        layout.addWidget(self.download_btn)
+
+        # Label de Estado local
+        self.status_label = QLabel("")
+        layout.addWidget(self.status_label)
+        
+        layout.addStretch()
+        self.setLayout(layout)
+
+    def browse_folder(self):
+        folder = QFileDialog.getExistingDirectory(self, "Seleccionar carpeta de destino")
+        if folder:
+            self.path_input.setText(folder)
+
+    def start_download(self):
+        url = self.url_input.text().strip()
+        save_path = self.path_input.text().strip()
+
+        if not url:
+            QMessageBox.warning(self, "Atención", "Por favor, introduce una URL válida.")
+            return
+
+        if not os.path.exists(save_path):
+            QMessageBox.warning(self, "Atención", "La ruta de destino seleccionada no existe.")
+            return
+
+        # Bloquear controles para evitar descargas simultáneas
+        self.set_inputs_enabled(False)
+        self.status_label.setText("Iniciando proceso...")
+
+        # Iniciar hilo en segundo plano
+        self.downloader_thread = VideoDownloader(url, save_path)
+        self.downloader_thread.progress_signal.connect(self.update_status)
+        self.downloader_thread.finished_signal.connect(self.on_download_finished)
+        self.downloader_thread.start()
+
+    def update_status(self, message):
+        self.status_label.setText(message)
+
+    def on_download_finished(self, success, message):
+        self.set_inputs_enabled(True)
+        self.status_label.setText("")
+        
+        if success:
+            QMessageBox.information(self, "Éxito", message)
+            self.url_input.clear()
+        else:
+            QMessageBox.critical(self, "Error", message)
+
+    def set_inputs_enabled(self, enabled: bool):
+        self.url_input.setEnabled(enabled)
+        self.path_input.setEnabled(enabled)
+        self.browse_btn.setEnabled(enabled)
+        self.download_btn.setEnabled(enabled)