Fix the issue with Jinja conditions in Foreign Data Wrappers, Foreign Servers, User Mapping.

I also did some re-formatting & re-factoring to code to remove all the duplicate code.

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

@@ -111,3 +111,68 @@ def parse_priv_to_db(str_privileges, allowed_acls=[]):
         })
 
     return privileges
+
+
+def tokenize_options(options_from_db, option_name, option_value):
+    """
+    This function will tokenize the string stored in database
+    e.g. database store the value as below
+    key1=value1, key2=value2, key3=value3, ....
+    This function will extract key and value from above string
+
+    Args:
+        options_from_db: Options from database
+        option_name: Option Name
+        option_value: Option Value
+
+    Returns:
+        Tokenized options
+    """
+    options = []
+    if options_from_db is not None:
+        option_str = options_from_db.split(',')
+        for fdw_option in option_str:
+            k, v = fdw_option.split('=', 1)
+            options.append({option_name: k, option_value: v})
+    return options
+
+
+def validate_options(options, option_name, option_value):
+    """
+    This function will filter validated options
+    and sets flag to use in sql template if there are any
+    valid options
+
+    Args:
+        options: List of options
+        option_name: Option Name
+        option_value: Option Value
+
+    Returns:
+        Flag, Filtered options
+    """
+    valid_options = []
+    is_valid_options = False
+
+    for option in options:
+        # If option name is valid
+        if option_name in option and \
+            option[option_name] is not None and \
+                option[option_name] != '' and \
+                len(option[option_name].strip()) > 0:
+            # If option value is valid
+            if option_value in option and \
+                            option[option_value] is not None and \
+                            option[option_value] != '' and \
+                            len(option[option_value].strip()) > 0:
+                # Do nothing here
+                pass
+            else:
+                # Set empty string if no value provided
+                option[option_value] = ''
+            valid_options.append(option)
+
+    if len(valid_options) > 0:
+        is_valid_options = True
+
+    return is_valid_options, valid_options