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Remove converter
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Liam
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1 changed files with 0 additions and 233 deletions
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defmodule Mix.Tasks.ConvertToVerifiedRoutes do
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@moduledoc """
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Replaces routes with verified routes.
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Forked from
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https://gist.github.com/andreaseriksson/e454b9244a734310d4ab74d8595f98cd
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https://gist.github.com/jiegillet/e6357c82e36a848ad59295eb3d5a1135
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This requires all routes to consistently be aliased with
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alias PhilomenaWeb.Router.Helpers, as: Routes
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Run with
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mix convert_to_verified_routes
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"""
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use Mix.Task
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@regex ~r/(Routes\.)([a-zA-Z0-9_]+)(path|url)\(/
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@web_module PhilomenaWeb
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def run(_) do
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Path.wildcard("test/**/*.ex*")
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|> Enum.concat(Path.wildcard("lib/**/*.ex*"))
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|> Enum.concat(Path.wildcard("lib/**/*.eex*"))
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|> Enum.concat(Path.wildcard("lib/**/*.slime"))
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|> Enum.sort()
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|> Enum.reject(&String.contains?(&1, "convert_to_verified_routes.ex"))
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|> Enum.filter(&(&1 |> File.read!() |> String.contains?("Routes.")))
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|> Enum.each(&format_file/1)
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:ok
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end
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def format_file(filename) do
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Mix.shell().info(filename)
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formatted_content =
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filename
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|> File.read!()
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|> format_string()
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File.write!(filename, [formatted_content])
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end
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def format_string(source) do
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case Regex.run(@regex, source, capture: :first, return: :index) do
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[{index, length}] ->
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# Compute full length of expression
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length = nibble_expression(source, index, length)
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# Convert to verified route format
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route = format_route(String.slice(source, index, length))
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# Split string around expression
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prefix = String.slice(source, 0, index)
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suffix = String.slice(source, index + length, String.length(source))
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# Insert verified route and rerun
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format_string("#{prefix}#{route}#{suffix}")
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_ ->
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source
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end
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end
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defp nibble_expression(source, index, length) do
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if index + length > String.length(source) do
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raise "Failed to match route expression"
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end
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case Code.string_to_quoted(String.slice(source, index, length)) do
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{:ok, _macro} ->
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length
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_ ->
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nibble_expression(source, index, length + 1)
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end
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end
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defp format_route(route) do
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ast =
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Code.string_to_quoted!(route,
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literal_encoder: &{:ok, {:__block__, &2, [&1]}},
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unescape: false,
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token_metadata: true
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)
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ast
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|> Macro.prewalk(&replace_route/1)
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|> Code.quoted_to_algebra(escape: false)
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|> Inspect.Algebra.format(:infinity)
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end
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defp decode_literal(literal) when is_binary(literal) or is_integer(literal) do
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{:ok, literal}
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end
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defp decode_literal({:__block__, _, [literal]}) do
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{:ok, literal}
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end
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defp decode_literal(node), do: {:error, node}
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defp encode_literal(literal) do
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{:__block__, [], [literal]}
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end
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# Routes.url(MyAppWeb.Endpoint)
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defp replace_route({{:., _, [{:__aliases__, _, [:Routes]}, :url]}, _, [_conn_or_endpoint]}) do
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{:url, [], [{:sigil_p, [delimiter: "\""], [{:<<>>, [], ["/"]}, []]}]}
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end
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# Routes.static_path(conn, "/images/favicon.ico")
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defp replace_route({{:., _, [{:__aliases__, _, [:Routes]}, :static_path]}, _, args}) do
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[_conn_or_endpoint, path] = args
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case decode_literal(path) do
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{:ok, path} -> {:sigil_p, [delimiter: "\""], [{:<<>>, [], [path]}, []]}
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_ -> {:sigil_p, [delimiter: "\""], [path, []]}
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end
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end
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# Routes.static_url(conn, "/images/favicon.ico")
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defp replace_route({{:., _, [{:__aliases__, _, [:Routes]}, :static_url]}, _, args}) do
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[_conn_or_endpoint, path] = args
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sigil =
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case decode_literal(path) do
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{:ok, path} -> {:sigil_p, [delimiter: "\""], [{:<<>>, [], [path]}, []]}
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_ -> {:sigil_p, [delimiter: "\""], [path, []]}
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end
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{:url, [], [sigil]}
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end
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# Routes.some_path(conn, :action, "en", query_params)
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defp replace_route(
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{{:., _, [{:__aliases__, _, [:Routes]}, path_name]}, _, [_ | _] = args} = node
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) do
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[_conn_or_endpoint, action | params] = args
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action =
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case decode_literal(action) do
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{:ok, action} -> action
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_ -> action
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end
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path_name = "#{path_name}"
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case find_verified_route(path_name, action, params) do
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:ok -> node
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route -> route
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end
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end
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defp replace_route(node), do: node
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defp find_verified_route(path_name, action, arguments) do
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# pleaaaase don't have a route named Routes.product_url_path(conn, :index)
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trimmed_path = path_name |> String.trim_trailing("_path") |> String.trim_trailing("_url")
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route =
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Phoenix.Router.routes(@web_module.Router)
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|> Enum.find(fn %{helper: helper, plug_opts: plug_opts} ->
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plug_opts == action && is_binary(helper) && trimmed_path == helper
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end)
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case route do
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%{path: path} ->
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{path_bits, query_params} =
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path
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|> String.split("/", trim: true)
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|> replace_path_variables(arguments, [])
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path_bits =
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path_bits
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|> Enum.flat_map(fn bit -> ["/", bit] end)
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|> format_for_sigil_binary_args(query_params)
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sigil = {:sigil_p, [delimiter: "\""], [{:<<>>, [], path_bits}, []]}
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if String.ends_with?(path_name, "_url") do
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{:url, [], [sigil]}
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else
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sigil
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end
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_ ->
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Mix.shell().error(
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"Could not find route #{path_name}, with action #{inspect(action)} and arguments #{inspect(arguments)}"
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)
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end
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end
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defp replace_path_variables([], arguments, path_bits) do
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{Enum.reverse(path_bits), arguments}
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end
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defp replace_path_variables(path, [], path_bits) do
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{Enum.reverse(path_bits) ++ path, []}
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end
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# conceptually /post/:post_id -> /post/#{id}
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defp replace_path_variables([path_piece | rest], [arg | args], path_bits) do
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if String.starts_with?(path_piece, ":") do
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replace_path_variables(rest, args, [arg | path_bits])
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else
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replace_path_variables(rest, [arg | args], [path_piece | path_bits])
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end
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end
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defp format_for_sigil_binary_args(path_bits, [_ | _] = query_params) do
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format_for_sigil_binary_args(path_bits ++ ["?" | query_params], [])
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end
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defp format_for_sigil_binary_args(path_bits, []) do
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path_bits
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|> Enum.map(&decode_literal/1)
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|> Enum.map(fn
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{:ok, bit} when is_binary(bit) ->
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bit
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{:ok, bit} when is_atom(bit) or is_integer(bit) ->
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to_string(bit)
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{_, bit} ->
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{:"::", [],
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[
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{{:., [], [Kernel, :to_string]}, [from_interpolation: true], [encode_literal(bit)]},
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{:binary, [], Elixir}
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]}
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end)
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end
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end
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