80 lines
2.6 KiB
Python
80 lines
2.6 KiB
Python
# -*- coding: utf-8; -*-
|
|
################################################################################
|
|
#
|
|
# Rattail -- Retail Software Framework
|
|
# Copyright © 2010-2017 Lance Edgar
|
|
#
|
|
# This file is part of Rattail.
|
|
#
|
|
# Rattail is free software: you can redistribute it and/or modify it under the
|
|
# terms of the GNU General Public License as published by the Free Software
|
|
# Foundation, either version 3 of the License, or (at your option) any later
|
|
# version.
|
|
#
|
|
# Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
# details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along with
|
|
# Rattail. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
################################################################################
|
|
"""
|
|
Tools for displaying data diffs
|
|
"""
|
|
|
|
from __future__ import unicode_literals, absolute_import
|
|
|
|
from pyramid.renderers import render
|
|
from webhelpers2.html import HTML
|
|
|
|
|
|
class Diff(object):
|
|
"""
|
|
Core diff class. In sore need of documentation.
|
|
"""
|
|
|
|
def __init__(self, old_data, new_data, columns=None, fields=None, render_field=None, render_value=None, monospace=False):
|
|
self.old_data = old_data
|
|
self.new_data = new_data
|
|
self.columns = columns or ["field name", "old value", "new value"]
|
|
self.fields = fields or self.make_fields()
|
|
self._render_field = render_field or self.render_field_default
|
|
self.render_value = render_value or self.render_value_default
|
|
self.monospace = monospace
|
|
|
|
def make_fields(self):
|
|
return sorted(set(self.old_data) | set(self.new_data), key=lambda x: x.lower())
|
|
|
|
def old_value(self, field):
|
|
return self.old_data[field]
|
|
|
|
def new_value(self, field):
|
|
return self.new_data[field]
|
|
|
|
def values_differ(self, field):
|
|
return self.new_value(field) != self.old_value(field)
|
|
|
|
def render_html(self, template='/diff.mako', **kwargs):
|
|
context = kwargs
|
|
context['diff'] = self
|
|
return HTML.literal(render(template, context))
|
|
|
|
def render_field(self, field):
|
|
return self._render_field(field, self)
|
|
|
|
def render_field_default(self, field, diff):
|
|
return field
|
|
|
|
def render_value_default(self, field, value):
|
|
return repr(value)
|
|
|
|
def render_old_value(self, field):
|
|
value = self.old_value(field)
|
|
return self.render_value(field, value)
|
|
|
|
def render_new_value(self, field):
|
|
value = self.new_value(field)
|
|
return self.render_value(field, value)
|