def _render(format_string, message_body, context):
"""
Create a text message using a template, message body and context.
Convert message body (`message_body`) into an email message
using the provided template. The template is a format string,
which is rendered using format() with the provided `context` dict.
This doesn't insert user's text into template, until such time we can
support proper error handling due to errors in the message body
(e.g. due to the use of curly braces).
Instead, for now, we insert the message body *after* the substitutions
have been performed, so that anything in the message body that might
interfere will be innocently returned as-is.
Output is returned as a unicode string. It is not encoded as utf-8.
Such encoding is left to the email code, which will use the value
of settings.DEFAULT_CHARSET to encode the message.
"""
# If we wanted to support substitution, we'd call:
# format_string = format_string.replace(COURSE_EMAIL_MESSAGE_BODY_TAG, message_body)
result = format_string.format(**context)
# Note that the body tag in the template will now have been
# "formatted", so we need to do the same to the tag being
# searched for.
message_body_tag = COURSE_EMAIL_MESSAGE_BODY_TAG.format()
result = result.replace(message_body_tag, message_body, 1)
# finally, return the result, after wrapping long lines and without converting to an encoded byte array.
return wrap_message(result)
def _render(format_string, message_body, context):
"""
Create a text message using a template, message body and context.
Convert message body (`message_body`) into an email message
using the provided template. The template is a format string,
which is rendered using format() with the provided `context` dict.
Any keywords encoded in the form %%KEYWORD%% found in the message
body are subtituted with user data before the body is inserted into
the template.
Output is returned as a unicode string. It is not encoded as utf-8.
Such encoding is left to the email code, which will use the value
of settings.DEFAULT_CHARSET to encode the message.
"""
# Substitute all %%-encoded keywords in the message body
if 'user_id' in context and 'course_id' in context:
message_body = substitute_keywords_with_data(message_body, context['user_id'], context['course_id'])
result = format_string.format(**context)
# Note that the body tag in the template will now have been
# "formatted", so we need to do the same to the tag being
# searched for.
message_body_tag = COURSE_EMAIL_MESSAGE_BODY_TAG.format()
result = result.replace(message_body_tag, message_body, 1)
# finally, return the result, after wrapping long lines and without converting to an encoded byte array.
return wrap_message(result)
