+ defp prepare_tags(query, options) do
+ tags =
+ query
+ |> preprocess_uri_query()
+ |> String.split(~r/[^#\w]+/u, trim: true)
+ |> Enum.uniq_by(&String.downcase/1)
+
+ explicit_tags = Enum.filter(tags, fn tag -> String.starts_with?(tag, "#") end)
+
+ tags =
+ if Enum.any?(explicit_tags) do
+ explicit_tags
+ else
+ tags
+ end
+
+ tags = Enum.map(tags, fn tag -> String.trim_leading(tag, "#") end)
+
+ tags =
+ if Enum.empty?(explicit_tags) && !options[:skip_joined_tag] do
+ add_joined_tag(tags)
+ else
+ tags
+ end
+
+ Pleroma.Pagination.paginate(tags, options)
+ end
+
+ defp add_joined_tag(tags) do
+ tags
+ |> Kernel.++([joined_tag(tags)])
+ |> Enum.uniq_by(&String.downcase/1)
+ end
+
+ # If `query` is a URI, returns last component of its path, otherwise returns `query`
+ defp preprocess_uri_query(query) do
+ if query =~ ~r/https?:\/\// do
+ query
+ |> String.trim_trailing("/")
+ |> URI.parse()
+ |> Map.get(:path)
+ |> String.split("/")
+ |> Enum.at(-1)
+ else
+ query
+ end
+ end
+
+ defp joined_tag(tags) do
+ tags
+ |> Enum.map(fn tag -> String.capitalize(tag) end)
+ |> Enum.join()