[FIX] Add parent_id field in options in mail_reply.js and and add parent_id parameter in context in base.js

mail_base/static/src/js/base.js

@@ -797,12 +797,15 @@ chat_manager.post_message = function (data, options) {
                 });
             } else {
                 options.model = 'mail.compose.message';
-                options.res_id = msg.id;
                 var compose_model = new Model(options.model);
-                return compose_model.call('send_mail_action', [options.res_id], {
+                return compose_model.call('send_mail_action', [options.res_id, {
                     res_model: options.model,
-                    res_id: options.res_id
-                });
+                    res_id: options.res_id,
+                    context: {
+                        default_parent_id: options.parent_id
+                    }
+                    
+                }]);
             }
         }
     };

mail_reply/static/src/js/mail_reply.js

@@ -16,6 +16,30 @@ ChatAction.include({
             subject = "Re: " + message.subject;
         }
         this.extended_composer.set_subject(subject);
+    },
+    on_post_message: function(message){
+        var self = this;
+        var options = this.selected_message ? {} : {channel_id: this.channel.id};
+        if (this.selected_message) {
+            message.subtype = 'mail.mt_comment';
+            message.subtype_id = false;
+            message.message_type = 'comment';
+            message.content_subtype = 'html';
+
+            options.model = this.selected_message.model;
+            options.res_id = this.selected_message.res_id;
+            options.parent_id = this.selected_message.id;
+        }
+        base_obj.chat_manager
+            .post_message(message, options)
+            .then(function() {
+                if (self.selected_message) {
+                    self.render_snackbar('mail.chat.MessageSentSnackbar', {record_name: self.selected_message.record_name}, 5000);
+                    self.unselect_message();
+                } else {
+                    self.thread.scroll_to();
+                }
+            });
     }
 });