[IMP] Allow to override/extend the way we get the fallback template

Author: lmignon

report_py3o/models/py3o_report.py

@@ -82,6 +82,40 @@ class Py3oReport(models.TransientModel):
         required=True
     )
 
+    @api.multi
+    def _get_template_from_path(self, tmpl_name):
+        """"Return the template from the path to root of the module if specied
+        or an absolute path on your server
+        """
+        if not tmpl_name:
+            return None
+        report_xml = self.ir_actions_report_xml_id
+        flbk_filename = None
+        if report_xml.module:
+            # if the default is defined
+            flbk_filename = pkg_resources.resource_filename(
+                "odoo.addons.%s" % report_xml.module,
+                tmpl_name,
+            )
+        elif os.path.isabs(tmpl_name):
+            # It is an absolute path
+            flbk_filename = os.path.normcase(os.path.normpath(tmpl_name))
+        if flbk_filename and os.path.exists(flbk_filename):
+            # and it exists on the fileystem
+            with open(flbk_filename, 'r') as tmpl:
+                return tmpl.read()
+        return None
+
+    @api.multi
+    def _get_template_fallback(self):
+        """
+        Return the template referenced in the report definition
+        :return:
+        """
+        self.ensure_one()
+        report_xml = self.ir_actions_report_xml_id
+        return self._get_template_from_path(report_xml.py3o_template_fallback)
+
     @api.multi
     def get_template(self):
         """private helper to fetch the template data either from the database
@@ -105,22 +139,8 @@ def get_template(self):
                 report_xml.py3o_template_id.py3o_template_data
             )
 
-        elif report_xml.py3o_template_fallback:
-            tmpl_name = report_xml.py3o_template_fallback
-            flbk_filename = None
-            if report_xml.module:
-                # if the default is defined
-                flbk_filename = pkg_resources.resource_filename(
-                    "odoo.addons.%s" % report_xml.module,
-                    tmpl_name,
-                )
-            elif os.path.isabs(tmpl_name):
-                # It is an absolute path
-                flbk_filename = os.path.normcase(os.path.normpath(tmpl_name))
-            if flbk_filename and os.path.exists(flbk_filename):
-                # and it exists on the fileystem
-                with open(flbk_filename, 'r') as tmpl:
-                    tmpl_data = tmpl.read()
+        else:
+            tmpl_data = self._get_template_fallback()
 
         if tmpl_data is None:
             # if for any reason the template is not found