mail_digest: display mail tracking values

Prior to this change we could have digest messages w/ no content.
Now we display mail tracking values if any.

mail_digest/controllers/digest_layout_preview.py

@@ -92,7 +92,6 @@ class DigestPreview(http.Controller):
                 msg.subtype_id = subtype
                 subject, body = self._fake_content(subtype, i, x)
                 msg.subject = subject
-                msg.body = body
                 msg.message_type = random.choice(
                     ('email', 'comment', 'notification'))
                 msg.email_from = 'random@user%d.com' % i
@@ -101,6 +100,11 @@ class DigestPreview(http.Controller):
                     # relate a document
                     msg.model = records._name
                     msg.res_id = random.choice(records.ids)
+                # simulate messages w/ no body but tracking values
+                if x == random.choice([1, 2]):
+                    msg.tracking_value_ids = self._fake_tracking_vals()
+                else:
+                    msg.body = body
                 messages += msg
         return messages
 

mail_digest/templates/digest_default.xml

@@ -43,6 +43,18 @@
                                     <div class="message-wrapper"
                                          t-attf-style="margin:0 10px;padding:5px 10px;#{not msg_first and 'border-top:1px solid #ccc'}">
                                         <t t-raw="digest.message_body(msg)" />
+                                        <t t-if="msg.tracking_value_ids">
+                                            <h4>Changed values</h4>
+                                            <ul class="tracking-values">
+                                                <t t-foreach="msg.tracking_value_ids" t-as="tracked">
+                                                    <li>
+                                                        <strong class="fname"><span t-field="tracked.field_desc" />:</strong>
+                                                        <span class="fvalue-old" t-esc="tracked.get_old_display_value()[0]" /> &#8594;
+                                                        <span class="fvalue-new" t-esc="tracked.get_new_display_value()[0]" />
+                                                    </li>
+                                                </t>
+                                            </ul>
+                                        </t>
                                     </div>
                                 </t>
                             </div>