Added function for search listing

Reviewed-by: tischrei <tino.schreiber@t-systems.com>
Co-authored-by: Gode, Sebastian <sebastian.gode@t-systems.com>
Co-committed-by: Gode, Sebastian <sebastian.gode@t-systems.com>

otc_metadata/services.py

@@ -113,6 +113,48 @@ class Services(object):
             res[cat]["docs"].append(res_doc)
         return res
 
+    def service_types_with_doc_types(self, environment=None):
+        """Retrieve type and title from services and corresponding docs.
+            As well as a list of all doc_types.
+
+        :param str environment: Optional service environment.
+        """
+        service_list = []
+        doc_types = []
+
+        for service in self.all_services:
+            if not service["service_title"]:
+                continue
+            if not service["service_type"]:
+                continue
+
+            doc_list = []
+            for doc in self.all_docs:
+                if "environment" in doc:
+                    if doc["environment"] != environment:
+                        continue
+                if doc["service_type"] == service["service_type"]:
+                    doc_list.append({
+                        "title": doc["title"],
+                        "type": doc["type"]
+                    })
+
+                if doc["type"] not in doc_types:
+                    doc_types.append(doc["type"])
+
+            service_list.append({
+                "service_title": service["service_title"],
+                "service_type": service["service_type"],
+                "docs": doc_list
+            })
+
+        res = {
+            "services": service_list,
+            "doc_types": doc_types
+        }
+
+        return res
+
     def docs_by_service_category(self, category, environment=None):
         """List services matching category