Improvise the pgsql driver to keep the utility names used for different

operation like backup, restore, etc within it.

Also:
* improvised the color combination of the background process logger.
* Removed an unnecessary print statement from the
  get_storage_directory(..) function, also return None if STORAGE_DIR
  is set to None.

web/pgadmin/browser/server_groups/servers/types.py

@@ -7,13 +7,11 @@
 #
 ##########################################################################
 
-import six
-from abc import ABCMeta, abstractmethod, abstractproperty
 from flask import render_template
 from flask.ext.babel import gettext
 
 
-class ServerType:
+class ServerType(object):
     """
     Server Type
 
@@ -72,5 +70,17 @@ class ServerType:
                 reverse=True
                 )
 
+    @classmethod
+    def utility(cls, operation, sverion):
+        if operation == 'backup':
+            return 'pg_dump'
+        if operation == 'backup_server':
+            return 'pg_dumpall'
+        if operation == 'restore':
+            return 'pg_restore'
+
+        return None
+
+
 # Default Server Type
 ServerType('pg', gettext("PostgreSQL"), -1)

web/pgadmin/misc/bgprocess/static/css/bgprocess.css

@@ -85,24 +85,24 @@
 
 .pg-panel-content div.bg-process-watcher.col-xs-12 {
   height: 100%;
-  padding: 0px;
+  padding: 0px 0px 0px 0px;
   WebkitTransition: all 1s;
   transition: all 1s;
+  background-color: rgb(255, 239, 217);
 }
 
 ol.pg-bg-process-logs {
-  padding: 15px 15px 15px 60px;
+  padding: 5px 10px 5px 60px;
   height: 100%;
   overflow: auto;
   width: 100%;
-  background: #000;
+  background: rgb(255, 239, 217);
 }
 
 .pg-bg-res-out, .pg-bg-res-err {
-  background-color: #000;
+  background-color: rgb(255, 239, 217);
   padding-left: 10px;
   white-space: pre-wrap;
-  font-size: 12px;
 }
 
 .pg-bg-res-out {
@@ -117,6 +117,7 @@ ol.pg-bg-process-logs {
   padding: 10px 15px;
   min-height: 70px;
   color: #000;
+  background-color: whitesmoke;
 }
 
 .pg-panel-content .bg-process-stats p{
@@ -131,7 +132,7 @@ ol.pg-bg-process-logs {
   padding: 10px 15px;
   position: absolute;
   bottom: 0;
-  background-color: white;
+  background-color: whitesmoke;
 }
 
 .pg-panel-content .bg-process-footer p {

web/pgadmin/utils/driver/psycopg2/__init__.py

@@ -335,6 +335,7 @@ WHERE
             for st in kwargs['server_types']:
                 if st.instanceOf(mgr.ver):
                     mgr.server_type = st.stype
+                    mgr.server_cls = st
                     break
 
         mgr.update_session()
@@ -1017,6 +1018,7 @@ class ServerManager(object):
         self.ver = None
         self.sversion = None
         self.server_type = None
+        self.server_cls = None
         self.password = None
 
         self.sid = server.id
@@ -1188,6 +1190,7 @@ WHERE db.oid = {0}""".format(did))
                     self.ver = None
                     self.sversion = None
                     self.server_type = None
+                    self.server_cls = None
                     self.password = None
 
                 self.update_session()
@@ -1203,6 +1206,7 @@ WHERE db.oid = {0}""".format(did))
         self.ver = None
         self.sversion = None
         self.server_type = None
+        self.server_cls = None
         self.password = None
 
         self.update_session()
@@ -1221,6 +1225,18 @@ WHERE db.oid = {0}""".format(did))
             managers[self.sid] = updated_mgr
         session['__pgsql_server_managers'] = managers
 
+    def utility(self, operation):
+        """
+        utility(operation)
+
+        Returns: name of the utility which used for the operation
+        """
+        if self.server_cls is not None:
+            return self.server_cls.utility(operation, self.sversion)
+
+        return None
+
+
 
 class Driver(BaseDriver):
     """

web/pgadmin/utils/paths.py

@@ -28,12 +28,15 @@ def get_storage_directory():
             ), 'storage'
         )
     )
+
+    if storage_dir is None:
+        return None
+
     username = current_user.email.split('@')[0]
     if len(username) == 0 or username[0].isdigit():
         username = 'pga_user_' + username
 
     storage_dir = os.path.join(storage_dir, username)
-    print(storage_dir)
 
     if not os.path.exists(storage_dir):
         os.makedirs(storage_dir, int('700', 8))
@@ -55,7 +58,7 @@ def init_app(app):
         )
     )
 
-    if not os.path.isdir(storage_dir):
+    if storage_dir and not os.path.isdir(storage_dir):
         if os.path.exists(storage_dir):
             raise Exception(
                 'The value specified for as the storage directory is not a directory!'