messages app django

ajax_middleware_messages.py

# coding=utf-8

import json
from django.contrib import messages


class AjaxMessaging(object):

    def process_response(self, request, response):

        if request.is_ajax():

            if response['Content-Type'] in ["application/javascript", "application/json"]:

                try:
                    content = json.loads(response.content)
                except ValueError:
                    return response

                django_messages = []

                for message in messages.get_messages(request):
                    django_messages.append({
                        "level": message.level,
                        "message": message.message,
                        "extra_tags": message.tags,
                    })

                content['messages'] = django_messages

                response.content = json.dumps(content)

        return response

ajax_profile.js

(function (context) {
    $.ajaxSetup({
    
        complete: function (xhr) {
            var contentType =  xhr.getResponseHeader("Content-Type"),
                json = null;
    
            if (contentType === "application/json" || contentType === "text/json") {
                try {
                    json = $.parseJSON(xhr.responseText);
                    $.each(json.messages, function (index) {
                        if (json.messages[index].extra_tags === "success") {
                            alertify.success(json.messages[index].message);
                        } else if (json.messages[index].extra_tags === "error") {
                            alertify.error(json.messages[index].message);
                        }
                    });
                } catch (err) {
                    return true;
                }
            }
    
        },
    
        error: function () {
            alertify.error(gettext("Ha ocurrido un error"), "", 6);
        }
    
    });
})(window || this);