add basic ncurses funcionality

this commit adds the basic functionality of curses. The output however doesn't
get displayed in the window yet.

borg_interface/interface_functions.py

@@ -3,16 +3,39 @@ import sys
 import configparser
 import subprocess
 import interface_variables
+import curses
 
 int_vars = interface_variables
 
+def get_param(prompt_string):
+     screen.clear()
+     screen.border(0)
+     screen.addstr(2, 2, prompt_string)
+     screen.refresh()
+     input = screen.getstr(10, 10, 60)
+     return input
+
+def draw_screen():
+     screen = curses.initscr()
+     screen.clear()
+     screen.border(0)
+     screen.addstr(2, 2, "Please enter a number...")
+     screen.addstr(4, 4, "1 - List archives in repository")
+     screen.addstr(5, 4, "2 - Show archive details")
+     screen.addstr(6, 4, "3 - Mount archive")
+     screen.addstr(7, 4, "4 - Restore an archive to specific location")
+     screen.addstr(8, 4, "0 - Exit")
+     screen.refresh()
+
 def list_archives():
+    curses.endwin()
     borg_list = subprocess.Popen(['borg', 'list'], stdout=subprocess.PIPE)
     less_output = subprocess.Popen(['less'], stdin=borg_list.stdout)
     borg_list.wait()
     less_output.wait()
 
 def show_info():
+    curses.endwin()
     prompt_archive_name()
     os.system('clear')
     p = subprocess.Popen(['borg', 'info', '::' + int_vars.archive_name])
@@ -21,6 +44,7 @@ def show_info():
     pause()
 
 def mount_archive():
+    curses.endwin()
     prompt_archive_name()
     int_vars.mount_point = "/tmp/" + int_vars.archive_name
     if not os.path.exists(int_vars.mount_point):
@@ -35,6 +59,7 @@ def mount_archive():
     pause()
 
 def restore_archive():
+    curses.endwin()
     prompt_archive_name()
     restore_path = input("Please enter the path where you want to "
                          "restore to: ")
@@ -81,6 +106,7 @@ def configuration():
     os.environ['BORG_PASSPHRASE'] = password
 
 def exit():
+    curses.endwin()
     if (not int_vars.mount_point):
         print()
         sys.exit(0)

borg_interface/main.py

@@ -2,33 +2,30 @@
 import os
 import interface_functions
 import interface_variables
-
+import curses
 chosen_activity = None
 
 # The main menu starts there
 interface_functions.configuration()
 while chosen_activity != 0:
-    os.system('clear')
-    print("What would you like to do?")
-    # Start the chosen activity and go back to the activity selector.
-    print("1: List Backups, 2: Show archive details, 3: Mount Archive, "
-          "4: Restore Backup, 0: Exit")
+    interface_functions.draw_screen()
+    screen = curses.initscr()
     try:
-        chosen_activity = int(input("Choose the desired activity: "))
-        if chosen_activity == 1:
+        chosen_activity = screen.getch()
+        if chosen_activity == ord('1'):
             # prints all the archives in the repository and lists them with
             # less
             interface_functions.list_archives()
-        if chosen_activity == 2:
+        if chosen_activity == ord('2'):
             # Displays all the information related to the archive name the user 
             # enters
             interface_functions.show_info()
-        if chosen_activity == 3:
+        if chosen_activity == ord('3'):
             # mounts a chosen archive to /tmp/archive name
             interface_functions.mount_archive()
-        if chosen_activity == 4:
+        if chosen_activity == ord('4'):
            interface_functions.restore_archive()
-        elif chosen_activity == 0:
+        elif chosen_activity == ord('0'):
            interface_functions.exit()
     except ValueError:
         print("Please enter a full number.")