[IMP] email_template: add a lambda function to allow a user to format a date from a template mail into a specific timezone, and/or in a specific format.

Eg: ${format_tz(object.name, object.employee_id.address_id.tz,'%m/%d/%Y %H:%M')}

addons/email_template/email_template.py

@@ -34,9 +34,34 @@ from openerp import tools
 from openerp.tools.translate import _
 from urllib import urlencode, quote as quote
 
-
 _logger = logging.getLogger(__name__)
 
+
+def format_tz(pool, cr, uid, dt, tz=False, format=False, context=None):
+    context = dict(context or {})
+    if tz:
+        context['tz'] = tz or pool.get('res.users').read(cr, SUPERUSER_ID, uid, ['tz'])['tz'] or "UTC"
+    timestamp = datetime.datetime.strptime(dt, tools.DEFAULT_SERVER_DATETIME_FORMAT)
+
+    ts = fields.datetime.context_timestamp(cr, uid, timestamp, context)
+
+    if format:
+        return ts.strftime(format)
+    else:
+        lang = context.get("lang")
+        lang_params = {}
+        if lang:
+            res_lang = pool.get('res.lang')
+            ids = res_lang.search(cr, uid, [("code", "=", lang)])
+            if ids:
+                lang_params = res_lang.read(cr, uid, ids[0], ["date_format", "time_format"])
+        format_date = lang_params.get("date_format", '%B-%d-%Y')
+        format_time = lang_params.get("time_format", '%I-%M %p')
+
+        fdate = ts.strftime(format_date)
+        ftime = ts.strftime(format_time)
+        return "%s %s (%s)" % (fdate, ftime, tz)
+
 try:
     # We use a jinja2 sandboxed environment to render mako templates.
     # Note that the rendering does not cover all the mako syntax, in particular
@@ -164,6 +189,7 @@ class email_template(osv.osv):
         user = self.pool.get('res.users').browse(cr, uid, uid, context=context)
         records = self.pool[model].browse(cr, uid, res_ids, context=context) or [None]
         variables = {
+            'format_tz': lambda dt, tz=False, format=False: format_tz(self.pool, cr, uid, dt, tz, format, context),
             'user': user,
             'ctx': context,  # context kw would clash with mako internals
         }