lims_report_html: add function to get images

lims_report_html/report/results_report.html

@@ -20,14 +20,9 @@
             {% block report_header %}
             <table style="width:100%;">
                 <tr>
-                    <td style="width:50%;">
+                    <td style="width:100%;">
                         {% if company.logo %}
-                        <!-- COMPANY LOGO -->
-                        {% endif %}
-                    </td>
-                    <td style="width:50%;">
-                        {% if enac == 'True' %}
-                        <!-- ENAC LOGO -->
+                        <img src="{{ get_image(company.logo) }}" alt="{{ company.party.rec_name }}" style="width:300px; height:75px"/>
                         {% endif %}
                     </td>
                 </tr>
@@ -1207,6 +1202,7 @@
                 <tr>
                     <td style="width:100%;">
                         <hr/>
+                        <p class="text-center"><img src="{{ get_image(signature) }}" alt="signature" style="width:100px; height:100px;"/></p>
                         <p class="text-center">{{ signer }}</p>
                         <p class="text-center">{{ signer_role }}</p>
                     </td>

lims_report_html/results_report.py

@@ -1,6 +1,7 @@
 # This file is part of lims_report_html module for Tryton.
 # The COPYRIGHT file at the top level of this repository contains
 # the full copyright notices and license terms.
+from base64 import b64encode
 
 from trytond.model import fields
 from trytond.pool import Pool, PoolMeta
@@ -136,7 +137,15 @@ class ResultReport(metaclass=PoolMeta):
         context = cls.get_context(records, data)
         context.update({
             'report': action,
+            'get_image': cls.get_image,
             })
         res = report_template.render(**context)
         # print('TEMPLATE:\n', res)
         return res
+
+    @classmethod
+    def get_image(cls, image):
+        if not image:
+            return ''
+        b64_image = b64encode(image).decode()
+        return 'data:image/png;base64,%s' % b64_image