[IMP] mail, mail_bot: improved push notifications permission response

This commit makes small improvements on the messaging menu with
the new module `mail_bot`:

[IMP] When OdooBot has a request, it now adds "+1" to the counter of
      the messaging menu. The related preview also has a bold title,
      and displays "(1)" next to the title.

[REF] Static previews are no longer in mail_service. This was only
      used for "OdooBot has a request" preview. This logic has now
      been moved to the module `mail_bot` (was previously in `mail`).

[FIX] Title of response of push notifications permission clearly
      states whether permission has been granted or denied
      (was displaying "[Object object]" before this commit).

Task-ID 1877502

1 files changed, 35 insertions, 1 deletions

diff --git a/addons/mail_bot/static/src/js/mailbot_service.js b/addons/mail_bot/static/src/js/mailbot_service.js
index 300e95d06db..a75780ab090 100644
--- a/addons/mail_bot/static/src/js/mailbot_service.js
+++ b/addons/mail_bot/static/src/js/mailbot_service.js
@@ -5,8 +5,9 @@ var AbstractService = require('web.AbstractService');
 var core = require('web.core');
 var session = require('web.session');
 
+var _t = core._t;
+
 var MailBotService =  AbstractService.extend({
-    name: 'mailbot_service',
     /**
      * @override
      */
@@ -22,7 +23,40 @@ var MailBotService =  AbstractService.extend({
             }, 2*60*1000);
         }
     },
+    /**
+     * Get the previews related to the OdooBot (conversation not included).
+     * For instance, when there is no conversation with OdooBot and OdooBot has
+     * a request, it should display a preview in the systray messaging menu.
+     *
+     * @param {string|undefined} [filter]
+     * @returns {Object[]} list of objects that are compatible with the
+     *   'mail.Preview' template.
+     */
+    getPreviews: function (filter) {
+        var previews = [];
+        if (this.hasRequest() && (filter === 'mailbox_inbox' || !filter)) {
+            previews.push({
+                title: _t("OdooBot has a request"),
+                imageSRC: "/mail/static/src/img/odoobot.png",
+                status: 'bot',
+                body:  _t("Enable desktop notifications to chat"),
+                id: 'request_notification',
+                unreadCounter: 1,
+            });
+        }
+        return previews;
+    },
+    /**
+     * Tell whether OdooBot has a request or not.
+     *
+     * @returns {boolean}
+     */
+    hasRequest: function () {
+        return window.Notification && window.Notification.permission === "default";
+    },
 });
+
 core.serviceRegistry.add('mailbot_service', MailBotService);
 return MailBotService;
+
 });