added Row class with validate methods

diff --git a/sfa/util/genitable.py b/sfa/util/genitable.py
index bedb01b..ac15ade 100644 (file)
--- a/sfa/util/genitable.py
+++ b/sfa/util/genitable.py
@@ -17,6 +17,64 @@ from sfa.util.debug import *
 from sfa.util.config import *
 from sfa.util.filter import *
 
+class Row(dict):
+
+    # Set this to the name of the table that stores the row.
+    # e.g. table_name = "nodes"
+    table_name = None
+
+    # Set this to the name of the primary key of the table. It is
+    # assumed that the this key is a sequence if it is not set when
+    # sync() is called.
+    # e.g. primary_key="record_id"
+    primary_key = None
+
+    # Set this to the names of tables that reference this table's
+    # primary key.
+    join_tables = []
+    
+    def validate(self):
+        """
+        Validates values. Will validate a value with a custom function
+        if a function named 'validate_[key]' exists.
+        """
+        # Warn about mandatory fields
+        # XX TODO: Support checking for mandatory fields later
+        #mandatory_fields = self.db.fields(self.table_name, notnull = True, hasdef = False)
+        #for field in mandatory_fields:
+        #    if not self.has_key(field) or self[field] is None:
+        #        raise GeniInvalidArgument, field + " must be specified and cannot be unset in class %s"%self.__class__.__name__
+
+        # Validate values before committing
+        for key, value in self.iteritems():
+            if value is not None and hasattr(self, 'validate_' + key):
+                validate = getattr(self, 'validate_' + key)
+                self[key] = validate(value)
+
+
+    def validate_timestamp(self, timestamp, check_future = False):
+        """
+        Validates the specified GMT timestamp string (must be in
+        %Y-%m-%d %H:%M:%S format) or number (seconds since UNIX epoch,
+        i.e., 1970-01-01 00:00:00 GMT). If check_future is True,
+        raises an exception if timestamp is not in the future. Returns
+        a GMT timestamp string.
+        """
+
+        time_format = "%Y-%m-%d %H:%M:%S"
+
+        if isinstance(timestamp, StringTypes):
+            # calendar.timegm() is the inverse of time.gmtime()
+            timestamp = calendar.timegm(time.strptime(timestamp, time_format))
+
+        # Human readable timestamp string
+        human = time.strftime(time_format, time.gmtime(timestamp))
+
+        if check_future and timestamp < time.time():
+            raise GeniInvalidArgument, "'%s' not in the future" % human
+
+        return human
+
 class GeniTable(list):
 
     GENI_TABLE_PREFIX = "sfa"
@@ -62,6 +120,7 @@ class GeniTable(list):
 
         return False
 
+
     def create(self):
         
         querystr = "CREATE TABLE " + self.tablename + " ( \