working on db logic

lib/elixir_ai/data/db_helpers.ex

@@ -0,0 +1,26 @@
+defmodule ElixirAi.Data.DbHelpers do
+  @get_named_param ~r/\$\((\w+)\)/
+
+  def named_params_to_positional_params(query, params) do
+    param_occurrences = Regex.scan(@get_named_param, query)
+
+    {param_to_index, ordered_values} =
+      param_occurrences
+      |> Enum.reduce({%{}, []}, fn [_full_match, param_name], {index_map, values} ->
+        if Map.has_key?(index_map, param_name) do
+          {index_map, values}
+        else
+          next_index = map_size(index_map) + 1
+          param_value = Map.fetch!(params, param_name)
+          {Map.put(index_map, param_name, next_index), values ++ [param_value]}
+        end
+      end)
+
+    positional_sql =
+      Regex.replace(@get_named_param, query, fn _full_match, param_name ->
+        "$#{param_to_index[param_name]}"
+      end)
+
+    {positional_sql, ordered_values}
+  end
+end