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phoenix_html_simplified_helpers

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Some view helpers for phoenix html( truncate, time_ago_in_words, number_with_delimiter, url_for, current_page? )

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phoenix_html_simplified_helpers lib phoenix_html_simplified_helpers truncate.ex
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lib/phoenix_html_simplified_helpers/truncate.ex 

defmodule Phoenix.HTML.SimplifiedHelpers.Truncate do



  def truncate(text, options \\ []) do

    len = options[:length] || 30

    omi = options[:omission] || "..."



    cond do

     !String.valid?(text)       -> text

      String.length(text) < len -> text

      true ->

        len_with_omi = len - String.length(omi)

        stop =

          if options[:separator] do

            rindex(text, options[:separator], len_with_omi) || len_with_omi

          else

            len_with_omi

          end



        "#{String.slice(text, 0, stop)}#{omi}"

    end

  end



  defp rindex(text, str, offset) do

    text =

      if offset do

        String.slice(text, 0, offset)

      else

        text

      end



    revesed = text |> String.reverse

    matchword = String.reverse(str)



    case :binary.match(revesed, matchword) do

      {at, strlen} ->

        String.length(text) - at - strlen

      :nomatch     ->

        nil

    end

  end



end