FEATURE: add query to list all assigned topics

This lists all the topics assigned to all users ordered by user / topic id

lib/queries.rb

@@ -68,6 +68,11 @@ class Queries
             "id": -12,
             "name": "List of topics a user is watching/tracking/muted",
             "description": "The query requires a ‘notification_level’ parameter. Use 0 for muted, 1 for regular, 2 for tracked and 3 for watched topics."
+        },
+        "assigned-topics-report": {
+            "id": -13,
+            "name": "List of assigned topics by user",
+            "description": "This report requires the assign plugin, it will find all assigned topics"
         }
     }.with_indifferent_access
 
@@ -373,6 +378,16 @@ class Queries
     ORDER BY tu.last_visited_at DESC
     SQL
 
+    queries["assigned-topics-report"]["sql"] = <<~SQL
+      SELECT value::int user_id, topic_id
+      FROM topic_custom_fields tf
+      JOIN topics t on t.id = topic_id
+      JOIN users u on u.id = value::int
+        WHERE tf.name = 'assigned_to_id'
+         AND t.deleted_at IS NULL
+      ORDER BY username, topic_id
+    SQL
+
   # convert query ids from "mostcommonlikers" to "-1", "mostmessages" to "-2" etc.
   queries.transform_keys!.with_index { |key, idx| "-#{idx + 1}" }
   queries