template: Add initials filter.

libervia/backend/tools/common/template.py

@@ -497,6 +497,7 @@ class Renderer(object):
         self.env.globals["C"] = C
 
         # custom filters
+        self.env.filters["initials"] = self._initials
         self.env.filters["bare_jid"] = self._bare_jid
         self.env.filters["next_gidx"] = self._next_gidx
         self.env.filters["cur_gidx"] = self._cur_gidx
@@ -799,6 +800,17 @@ class Renderer(object):
         """Return the bare JID"""
         return str(jid.JID(str(full_jid)).bare)
 
+    def _initials(self, name: str) -> str:
+        """Return the uppercased initials of a name."""
+        name_parts = name.strip().split()
+        if not name_parts:
+            initials = "??"
+        elif len(name_parts) == 1:
+            initials = name_parts[0][:2]
+        else:
+            initials = name_parts[0][0] + name_parts[1][0]
+        return initials.upper()
+
     @pass_context
     def _next_gidx(self, ctx, value):
         """Use next current global index as suffix"""