forked from potsda.mn/mobilizon
85 lines
2.5 KiB
Elixir
85 lines
2.5 KiB
Elixir
defmodule Mobilizon.Service.Metadata.Utils do
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@moduledoc """
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Tools to convert tags to string.
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"""
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alias Mobilizon.Service.{Address, DateTime}
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alias Mobilizon.Service.Formatter.HTML, as: HTMLFormatter
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alias Phoenix.HTML
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import Mobilizon.Web.Gettext, only: [gettext: 1]
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@slice_limit 200
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@doc """
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Converts list of tags, containing either `t:Phoenix.HTML.safe/0` or strings, to a concatenated string listing the tags
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"""
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@spec stringify_tags(list(Phoenix.HTML.safe() | String.t())) :: String.t()
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def stringify_tags(tags), do: Enum.reduce(tags, "", &stringify_tag/2)
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@doc """
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Removes the HTML tags from a text
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"""
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@spec strip_tags(String.t()) :: String.t()
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def strip_tags(text), do: HTMLFormatter.strip_tags_and_insert_spaces(text)
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@doc """
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Processes a text and limits it.
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* Removes the HTML tags from a text
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* Slices it to a limit and add an ellipsis character
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* Returns a default description if text is empty
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"""
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@spec process_description(String.t(), String.t(), integer() | nil) :: String.t()
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def process_description(description, locale \\ "en", limit \\ @slice_limit)
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def process_description(nil, locale, limit), do: process_description("", locale, limit)
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def process_description("", locale, _limit) do
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default_description(locale)
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end
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def process_description(description, _locale, limit) do
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description
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|> HTMLFormatter.strip_tags_and_insert_spaces()
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|> String.trim()
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|> maybe_slice(limit)
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end
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@doc """
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Returns the default description for a text
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"""
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@spec default_description(String.t()) :: String.t()
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def default_description(locale \\ "en") do
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Gettext.put_locale(locale)
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gettext("The event organizer didn't add any description.")
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end
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defdelegate datetime_to_string(datetime, locale \\ "en", format \\ :medium), to: DateTime
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defdelegate render_address!(address), to: Address
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defp maybe_slice(description, nil), do: description
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defp maybe_slice(description, limit) do
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if String.length(description) > limit do
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description
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|> String.slice(0..limit)
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|> String.trim()
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|> (&"#{&1}…").()
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else
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description
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end
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end
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@spec stringify_tag(Phoenix.HTML.safe(), String.t()) :: String.t()
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defp stringify_tag(tag, acc) when is_tuple(tag), do: acc <> HTML.safe_to_string(tag)
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@spec stringify_tag(String.t(), String.t()) :: String.t()
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defp stringify_tag(tag, acc) when is_binary(tag), do: acc <> tag
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@spec escape_text(String.t()) :: String.t()
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def escape_text(text) do
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text
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|> HTML.html_escape()
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|> HTML.safe_to_string()
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end
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end
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