Add support for downloading all document libraries on a site

- New get_all_drives() fetches all drives from a SharePoint site
- main() loops over all drives when DOCUMENT_LIBRARY is empty, placing
  each library in its own subfolder under LOCAL_PATH
- MSAL force_refresh now catches TypeError/ValueError for compatibility
  with older MSAL versions that don't support the parameter
- GUI: "Download alle biblioteker" checkbox disables Library Navn and
  Mapper fields; load_settings restores checkbox state from config

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sharepoint_gui.py

@@ -47,19 +47,15 @@ class SharepointApp(ctk.CTk):
         self.logo_label.grid(row=0, column=0, padx=20, pady=(20, 10))
 
         self.entries = {}
-        fields = [
+
+        # Felter før DOCUMENT_LIBRARY
+        fields_before = [
             ("TENANT_ID", "Tenant ID"),
             ("CLIENT_ID", "Client ID"),
             ("CLIENT_SECRET", "Client Secret"),
             ("SITE_URL", "Site URL"),
-            ("DOCUMENT_LIBRARY", "Library Navn"),
-            ("FOLDERS_TO_DOWNLOAD", "Mapper (komma-sep)"),
-            ("LOCAL_PATH", "Lokal Sti"),
-            ("ENABLE_HASH_VALIDATION", "Valider Hash (True/False)"),
-            ("HASH_THRESHOLD_MB", "Hash Grænse (MB)")
         ]
-
-        for i, (key, label) in enumerate(fields):
+        for i, (key, label) in enumerate(fields_before):
             lbl = ctk.CTkLabel(self.sidebar_frame, text=label)
             lbl.grid(row=i*2+1, column=0, padx=20, pady=(5, 0), sticky="w")
             entry = ctk.CTkEntry(self.sidebar_frame, width=280)
@@ -67,6 +63,36 @@ class SharepointApp(ctk.CTk):
             entry.grid(row=i*2+2, column=0, padx=20, pady=(0, 5))
             self.entries[key] = entry
 
+        # DOCUMENT_LIBRARY med "Alle biblioteker"-afkrydsningsfelt
+        lbl_lib = ctk.CTkLabel(self.sidebar_frame, text="Library Navn")
+        lbl_lib.grid(row=9, column=0, padx=20, pady=(5, 0), sticky="w")
+        self.library_entry = ctk.CTkEntry(self.sidebar_frame, width=280)
+        self.library_entry.grid(row=10, column=0, padx=20, pady=(0, 2))
+        self.entries["DOCUMENT_LIBRARY"] = self.library_entry
+
+        self.all_libraries_var = ctk.BooleanVar(value=False)
+        self.all_libraries_cb = ctk.CTkCheckBox(
+            self.sidebar_frame, text="Download alle biblioteker",
+            variable=self.all_libraries_var,
+            command=self.toggle_library_entry
+        )
+        self.all_libraries_cb.grid(row=11, column=0, padx=20, pady=(0, 5), sticky="w")
+
+        # Felter efter DOCUMENT_LIBRARY
+        fields_after = [
+            ("FOLDERS_TO_DOWNLOAD", "Mapper (komma-sep)"),
+            ("LOCAL_PATH", "Lokal Sti"),
+            ("ENABLE_HASH_VALIDATION", "Valider Hash (True/False)"),
+            ("HASH_THRESHOLD_MB", "Hash Grænse (MB)")
+        ]
+        for i, (key, label) in enumerate(fields_after):
+            base_row = 12 + i * 2
+            lbl = ctk.CTkLabel(self.sidebar_frame, text=label)
+            lbl.grid(row=base_row, column=0, padx=20, pady=(5, 0), sticky="w")
+            entry = ctk.CTkEntry(self.sidebar_frame, width=280)
+            entry.grid(row=base_row+1, column=0, padx=20, pady=(0, 5))
+            self.entries[key] = entry
+
         self.browse_button = ctk.CTkButton(self.sidebar_frame, text="Vælg Mappe", command=self.browse_folder, height=32)
         self.browse_button.grid(row=20, column=0, padx=20, pady=10)
 
@@ -104,6 +130,16 @@ class SharepointApp(ctk.CTk):
         handler.setFormatter(logging.Formatter('%(asctime)s: %(message)s', datefmt='%H:%M:%S'))
         download_sharepoint.logger.addHandler(handler)
 
+    def toggle_library_entry(self):
+        if self.all_libraries_var.get():
+            self.library_entry.configure(state="normal")
+            self.library_entry.delete(0, "end")
+            self.library_entry.configure(state="disabled")
+            self.entries["FOLDERS_TO_DOWNLOAD"].configure(state="disabled")
+        else:
+            self.library_entry.configure(state="normal")
+            self.entries["FOLDERS_TO_DOWNLOAD"].configure(state="normal")
+
     def browse_folder(self):
         path = filedialog.askdirectory()
         if path:
@@ -116,6 +152,10 @@ class SharepointApp(ctk.CTk):
             for key, entry in self.entries.items():
                 val = config.get(key, "")
                 entry.insert(0, val)
+            if not config.get("DOCUMENT_LIBRARY", ""):
+                self.all_libraries_cb.select()
+                self.library_entry.configure(state="disabled")
+                self.entries["FOLDERS_TO_DOWNLOAD"].configure(state="disabled")
 
     def save_settings(self):
         config_lines = [f'{k} = "{v.get()}"' for k, v in self.entries.items()]