- attribute types and attribute settings

diff --git a/PLC/Attributes.py b/PLC/Attributes.py
new file mode 100644 (file)
index 0000000..5bd3cf1
--- /dev/null
+++ b/PLC/Attributes.py
@@ -0,0 +1,91 @@
+from types import StringTypes
+
+from PLC.Faults import *
+from PLC.Parameter import Parameter
+from PLC.Table import Row, Table
+from PLC.Roles import Roles
+
+class Attribute(Row):
+    """
+    Representation of a row in the attributes table. To use, instantiate
+    with a dict of values.
+    """
+
+    table_name = 'attributes'
+    primary_key = 'attribute_id'
+    fields = {
+        'attribute_id': Parameter(int, "Attribute identifier"),
+        'name': Parameter(str, "Attribute name", max = 100),
+        'description': Parameter(str, "Attribute description", max = 254),
+        'min_role_id': Parameter(int, "Minimum (least powerful) role that can set or change this attribute"),
+        }
+
+    def __init__(self, api, fields = {}):
+        Row.__init__(self, fields)
+        self.api = api
+
+    def validate_name(self, name):
+        name = name.strip()
+
+        if not name:
+            raise PLCInvalidArgument, "Attribute name must be set"
+
+        conflicts = Attributes(self.api, [name])
+        for attribute_id, attribute in conflicts.iteritems():
+            if 'attribute_id' not in self or self['attribute_id'] != attribute_id:
+                raise PLCInvalidArgument, "Attribute name already in use"
+
+        return name
+
+    def validate_min_role_id(self, role_id):
+        roles = Roles(self.api)
+        if role_id not in roles:
+            raise PLCInvalidArgument, "Invalid role"
+
+        return role_id
+
+    def delete(self, commit = True):
+        """
+        Delete existing slice attribute type.
+        """
+
+        assert 'attribute_id' in self
+
+        # Clean up miscellaneous join tables
+        for table in ['attributes', 'slice_attribute']:
+            self.api.db.do("DELETE FROM %s" \
+                           " WHERE attribute_id = %d" % \
+                           (table, self['attribute_id']), self)
+
+        if commit:
+            self.api.db.commit()
+
+class Attributes(Table):
+    """
+    Representation of row(s) from the attributes table in the
+    database.
+    """
+
+    def __init__(self, api, attribute_id_or_name_list = None):
+       self.api = api
+
+        sql = "SELECT %s FROM attributes" % \
+              ", ".join(Attribute.fields)
+
+        if attribute_id_or_name_list:
+            # Separate the list into integers and strings
+            attribute_ids = filter(lambda attribute_id: isinstance(attribute_id, (int, long)),
+                                   attribute_id_or_name_list)
+            names = filter(lambda name: isinstance(name, StringTypes),
+                           attribute_id_or_name_list)
+            sql += " WHERE (False"
+            if attribute_ids:
+                sql += " OR attribute_id IN (%s)" % ", ".join(map(str, attribute_ids))
+            if names:
+                sql += " OR name IN (%s)" % ", ".join(api.db.quote(names))
+            sql += ")"
+
+        rows = self.api.db.selectall(sql)
+ 
+        for row in rows:
+            self[row['attribute_id']] = Attribute(api, row)

diff --git a/PLC/SliceAttributes.py b/PLC/SliceAttributes.py
new file mode 100644 (file)
index 0000000..bf51c29
--- /dev/null
+++ b/PLC/SliceAttributes.py
@@ -0,0 +1,65 @@
+from types import StringTypes
+
+from PLC.Faults import *
+from PLC.Parameter import Parameter
+from PLC.Table import Row, Table
+from PLC.Attributes import Attribute, Attributes
+
+class SliceAttribute(Row):
+    """
+    Representation of a row in the slice_attribute table. To use,
+    instantiate with a dict of values.
+    """
+
+    table_name = 'slice_attribute'
+    primary_key = 'slice_attribute_id'
+    fields = {
+        'slice_attribute_id': Parameter(int, "Slice attribute identifier"),
+        'slice_id': Parameter(int, "Slice identifier"),
+        'node_id': Parameter(int, "Node identifier, if a sliver attribute"),
+        'attribute_id': Attribute.fields['attribute_id'],
+        'name': Attribute.fields['name'],
+        'description': Attribute.fields['description'],
+        'min_role_id': Attribute.fields['min_role_id'],
+        # XXX Arbitrary max, make configurable
+        'value': Parameter(str, "Slice attribute value", max = 254),
+        }
+
+    def __init__(self, api, fields = {}):
+        Row.__init__(self, fields)
+        self.api = api
+
+    def delete(self, commit = True):
+        """
+        Delete existing slice attribute.
+        """
+
+        assert 'slice_attribute_id' in self
+
+        # Clean up miscellaneous join tables
+        for table in 'slice_attribute',:
+            self.api.db.do("DELETE FROM %s" \
+                           " WHERE slice_attribute_id = %d" % \
+                           (table, self['slice_attribute_id']), self)
+
+        if commit:
+            self.api.db.commit()
+
+class SliceAttributes(dict):
+    """
+    Representation of row(s) from the slice_attribute table in the
+    database.
+    """
+
+    def __init__(self, api, slice_attribute_id_list):
+       self.api = api
+
+        sql = "SELECT %s FROM view_slice_attributes" % \
+              ", ".join(SliceAttribute.fields)
+
+        sql += " WHERE slice_attribute_id IN (%s)" % ", ".join(map(str, slice_attribute_id_list))
+
+        rows = self.api.db.selectall(sql)
+ 
+        for row in rows:
+            self[row['slice_attribute_id']] = SliceAttribute(api, row)