Refactor channel_group_search implementation in tdm_loader

When searching and resulting groups has identical channel group names, only the first channel group index is returned

New logic will look at channel group names together with occurrences to find the correct channel group index.

tdm_loader/tdm_loader.py

@@ -185,22 +185,27 @@ def channel_group_search(self, search_term):
         if not isinstance(search_term, str):
             raise TypeError("I can search for str terms only.")
 
-        chg_names = [
-            x.text
-            for x in self._root.findall(".//tdm_channelgroup/name")
-            if x.text is not None
-        ]
+        group_names = {}
+        chg_names = []
+        for x in self._root.findall(".//tdm_channelgroup/name"):
+            if x.text is not None:
+                if x.text not in group_names:
+                    group_names[x.text] = 0
+                else:
+                    group_names[x.text] += 1
+                chg_names.append((f"{x.text}", group_names[x.text]))
+
         search_term = search_term.upper().replace(" ", "")
         found_terms = [
             name
             for name in chg_names
-            if name.upper().replace(" ", "").find(search_term) >= 0
+            if name[0].upper().replace(" ", "").find(search_term) >= 0
         ]
 
         ind = []
         for name in found_terms:
-            i = chg_names.index(name)
-            ind.append((name, i))
+            i = self.channel_group_index(name[0], name[1])
+            ind.append((name[0], i))
 
         return ind