[IMP] mail: move odoobot avatar logic in partner model

task-2348684

closes odoo/odoo#58969

Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>

addons/mail/static/src/components/message/message.js

@@ -131,12 +131,7 @@ class Message extends Component {
      * @returns {string}
      */
     get avatar() {
-        if (
-            this.message.author &&
-            this.message.author === this.env.messaging.partnerRoot
-        ) {
-            return '/mail/static/src/img/odoobot.png';
-        } else if (this.message.author) {
+        if (this.message.author) {
             // TODO FIXME for public user this might not be accessible. task-2223236
             // we should probably use the correspondig attachment id + access token
             // or create a dedicated route to get message image, checking the access right of the message

addons/mail/static/src/models/partner/partner.js

@@ -195,6 +195,9 @@ function factory(dependencies) {
          * @returns {string}
          */
         _computeAvatarUrl() {
+            if (this === this.env.messaging.partnerRoot) {
+                return '/mail/static/src/img/odoobot.png';
+            }
             return `/web/image/res.partner/${this.id}/image_128`;
         }
 
@@ -260,6 +263,14 @@ function factory(dependencies) {
             return this.display_name || this.user && this.user.display_name;
         }
 
+        /**
+         * @private
+         * @returns {mail.messaging}
+         */
+        _computeMessaging() {
+            return [['link', this.env.messaging]];
+        }
+
         /**
          * @private
          * @returns {string|undefined}
@@ -278,6 +289,7 @@ function factory(dependencies) {
             compute: '_computeAvatarUrl',
             dependencies: [
                 'id',
+                'messagingPartnerRoot',
             ],
         }),
         correspondentThreads: one2many('mail.thread', {
@@ -311,6 +323,12 @@ function factory(dependencies) {
         messagesAsAuthor: one2many('mail.message', {
             inverse: 'author',
         }),
+        messaging: many2one('mail.messaging', {
+            compute: '_computeMessaging',
+        }),
+        messagingPartnerRoot: many2one('mail.partner', {
+            related: 'messaging.partnerRoot',
+        }),
         model: attr({
             default: 'res.partner',
         }),