From 71b25c5addd81ba2af2196291a2f802327e176f9 Mon Sep 17 00:00:00 2001
From: Xavier Morel <xmo@openerp.com>
Date: Fri, 29 Nov 2013 09:52:56 +0100
Subject: [PATCH] [ADD] relative datetime qweb widget

bzr revid: xmo@openerp.com-20131129085256-dwpcy0rd5v6bls9d
---
 openerp/addons/base/ir/ir_qweb.py             | 19 ++++++++++++++++++-
 .../addons/test_converter/tests/test_html.py  | 19 ++++++++++++++++++-
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/openerp/addons/base/ir/ir_qweb.py b/openerp/addons/base/ir/ir_qweb.py
index bc8549ab63f..460833dbe17 100644
--- a/openerp/addons/base/ir/ir_qweb.py
+++ b/openerp/addons/base/ir/ir_qweb.py
@@ -812,7 +812,6 @@ class DurationConverter(osv.AbstractModel):
 
         locale = babel.Locale.parse(
             self.user_lang(cr, uid, context=context).code)
-        print locale
         factor = units[options['unit']]
 
         sections = []
@@ -826,6 +825,24 @@ class DurationConverter(osv.AbstractModel):
                 sections.append(section)
         return u' '.join(sections)
 
+class RelativeDatetimeConverter(osv.AbstractModel):
+    _name = 'ir.qweb.field.relative'
+    _inherit = 'ir.qweb.field'
+
+    def value_to_html(self, cr, uid, value, column, options=None, context=None):
+        parse_format = openerp.tools.DEFAULT_SERVER_DATETIME_FORMAT
+        locale = babel.Locale.parse(
+            self.user_lang(cr, uid, context=context).code)
+
+        if isinstance(value, basestring):
+            value = datetime.datetime.strptime(value, parse_format)
+
+        # value should be a naive datetime in UTC. So is fields.datetime.now()
+        reference = datetime.datetime.strptime(column.now(), parse_format)
+
+        return babel.dates.format_timedelta(
+            value - reference, add_direction=True, locale=locale)
+
 
 def get_field_type(column, options):
     """ Gets a t-field's effective type from the field's column and its options
diff --git a/openerp/tests/addons/test_converter/tests/test_html.py b/openerp/tests/addons/test_converter/tests/test_html.py
index 98c784c39ef..71c08a412f4 100644
--- a/openerp/tests/addons/test_converter/tests/test_html.py
+++ b/openerp/tests/addons/test_converter/tests/test_html.py
@@ -2,6 +2,7 @@
 import json
 import os
 import xml.dom.minidom
+import datetime
 
 from openerp.tests import common
 from openerp.addons.base.ir import ir_qweb
@@ -306,7 +307,7 @@ class TestDatetimeExport(TestBasicExport):
 class TestDurationExport(TestBasicExport):
     def setUp(self):
         super(TestDurationExport, self).setUp()
-
+        # needs to have lang installed otherwise falls back on en_US
         self.registry('res.lang').load_lang(self.cr, self.uid, 'fr_FR')
 
     def test_negative(self):
@@ -338,3 +339,19 @@ class TestDurationExport(TestBasicExport):
 
         result = converter(72, {'unit': 'second'}, {'lang': 'fr_FR'})
         self.assertEqual(result, u"1 minute 12 secondes")
+
+class TestRelativeDatetime(TestBasicExport):
+    # not sure how a test based on "current time" should be tested. Even less
+    # so as it would mostly be a test of babel...
+
+    def setUp(self):
+        super(TestRelativeDatetime, self).setUp()
+        # needs to have lang installed otherwise falls back on en_US
+        self.registry('res.lang').load_lang(self.cr, self.uid, 'fr_FR')
+
+    def test_basic(self):
+        converter = self.get_converter('datetime', 'relative')
+        t = datetime.datetime.utcnow() - datetime.timedelta(hours=1)
+
+        result = converter(t, context={'lang': 'fr_FR'})
+        self.assertEqual(result, u"il y a 1 heure")