Create app.py

app.py

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+# Versión 1.0: Interfaz Modular con Gradio
+import gradio as gr
+import config
+from core import PDFEngine
+
+# Instanciamos el motor (Inyección simple)
+engine = PDFEngine()
+
+def interface_merge(files):
+    if not files:
+        return None
+    # Gradio pasa objetos 'namedtuple' o rutas dependiendo de la config.
+    # Asumimos que files es una lista de rutas de archivo.
+    return engine.merge_pdfs(files)
+
+def interface_split(file):
+    if not file:
+        return None
+    return engine.split_pdf(file)
+
+def interface_protect(file, password):
+    if not file or not password:
+        return None
+    return engine.protect_pdf(file, password)
+
+# Construcción de la UI
+with gr.Blocks(title=config.APP_TITLE, theme=gr.themes.Soft()) as demo:
+    gr.Markdown(f"# {config.APP_TITLE}")
+    gr.Markdown(config.APP_DESCRIPTION)
+    
+    with gr.Tabs():
+        # --- TAB: UNIR PDF ---
+        with gr.TabItem("Unir PDF"):
+            gr.Markdown(config.TXT_MERGE)
+            with gr.Row():
+                with gr.Column():
+                    merge_input = gr.File(
+                        file_count="multiple", 
+                        file_types=[".pdf"], 
+                        label="Sube tus PDFs (en orden)"
+                    )
+                    merge_btn = gr.Button("Unir Archivos", variant="primary")
+                with gr.Column():
+                    merge_output = gr.File(label="PDF Unido")
+            
+            merge_btn.click(
+                fn=interface_merge, 
+                inputs=merge_input, 
+                outputs=merge_output
+            )
+
+        # --- TAB: DIVIDIR PDF ---
+        with gr.TabItem("Dividir PDF"):
+            gr.Markdown(config.TXT_SPLIT)
+            with gr.Row():
+                with gr.Column():
+                    split_input = gr.File(
+                        file_count="single", 
+                        file_types=[".pdf"], 
+                        label="Sube tu PDF"
+                    )
+                    split_btn = gr.Button("Dividir en Páginas", variant="primary")
+                with gr.Column():
+                    # Gradio maneja listas de archivos como salida automáticamente
+                    split_output = gr.File(label="Páginas Extraídas", file_count="multiple")
+            
+            split_btn.click(
+                fn=interface_split, 
+                inputs=split_input, 
+                outputs=split_output
+            )
+
+        # --- TAB: PROTEGER PDF ---
+        with gr.TabItem("Proteger PDF"):
+            gr.Markdown(config.TXT_PROTECT)
+            with gr.Row():
+                with gr.Column():
+                    protect_input = gr.File(label="PDF a proteger")
+                    pass_input = gr.Textbox(label="Contraseña", type="password")
+                    protect_btn = gr.Button("Encriptar", variant="primary")
+                with gr.Column():
+                    protect_output = gr.File(label="PDF Encriptado")
+
+            protect_btn.click(
+                fn=interface_protect,
+                inputs=[protect_input, pass_input],
+                outputs=protect_output
+            )
+
+if __name__ == "__main__":
+    demo.launch()