Start working on transpert convertion

When the user starts pwman3 with an old database file,
he will be prompted to convert the database. When this
conversion is complete the text ui should start
with the newly converted database.

pwman/tests/test_complete_ui.py

@@ -29,8 +29,10 @@ _db_warn = ("\n*** WARNNING: You are using the old database format"
             " which is insecure."
             " Please upgrade to the new database "
             " format."
-            " Check the help (pwman3 -h) or look at the manpage which"
-            " explains how to proceed. ***")
+            " You can upgrade the database now, or you can do it later."
+            " Check the help (pwman3 -h) or look at the manpage. "
+            "***")
+
 
 class Ferrum(unittest.TestCase):
 

scripts/pwman3

@@ -32,8 +32,9 @@ _db_warn = ("\n*** WARNNING: You are using the old database format"
             " which is insecure."
             " Please upgrade to the new database "
             " format."
-            " Check the help (pwman3 -h) or look at the manpage which"
-            " explains how to proceed. ***")
+            " You can upgrade the database now, or you can do it later."
+            " Check the help (pwman3 -h) or look at the manpage. "
+            "***")
 
 def parser_options():
     parser = argparse.ArgumentParser(description=('pwman3 - a command line '
@@ -151,6 +152,31 @@ def get_db_version(config, dbtype, args):
     return dbver
 
 
+def auto_convert():
+    #1) Display a message saying that the database will be converted
+    # This step is done already in get_db_version
+    dbconvertor = PwmanConvertDB(args, config)
+
+    #2) copy the old database : cp ~/.pwman3/pwman.db ~/.pwman3/pwman.backup-2013-11-23-23:15.db
+    #3) Display a message about the backup file path
+    # These steps are done by PwmanConvertDB.backup_old_db()
+    dbconvertor.backup_old_db()
+
+    #4) convert the old database to the new format in ~/.pwman3/pwman.db
+    # This step is done by PwmanConvertDB.create_new_db()
+    #                      PwmanConvertDB.convert_nodes()
+    #                      PwmanConvertDB.save_new_nodes_to_db()
+    #                      PwmanConvertDB.save_old_key()
+
+    #5) Display a message about the result of the conversion
+    # add message here ...
+
+
+    #5b) close connection
+    #5c) rename the newly created db to the old name!
+    #6) Start the pwman3 normally if all went ok
+    return
+
 def main(args):
     PwmanCliNew, OSX = get_ui_platform(sys.platform)
     xselpath, dbtype = get_conf_options(args, OSX)
@@ -163,7 +189,7 @@ def main(args):
         sys.exit(0)
 
     if dbver < 0.4:
-        sys.exit(1)
+        auto_convert()
 
     db = pwman.data.factory.create(dbtype, dbver)
     cli = PwmanCliNew(db, xselpath, CLICallback)