94 lines
2.7 KiB
Elixir
94 lines
2.7 KiB
Elixir
defmodule Bones73kWeb.ErrorHelpers do
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@moduledoc """
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Conveniences for translating and building error messages.
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"""
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use Phoenix.HTML
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@doc """
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Generates tag for inlined form input errors.
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"""
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def error_tag(form, field, opts \\ []) do
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opts = error_opts(form, field, opts)
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form.errors
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|> Keyword.get_values(field)
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|> Enum.map(fn error -> content_tag(:span, translate_error(error), opts) end)
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end
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defp error_opts(form, field, opts) do
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append = "invalid-feedback"
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input_id = input_id(form, field)
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opts
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|> Keyword.put_new(:id, error_id(input_id))
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|> Keyword.put_new(:phx_feedback_for, input_id)
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|> Keyword.update(:class, append, fn c -> "#{append} #{c}" end)
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end
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def error_id(%Phoenix.HTML.Form{} = form, field), do: input_id(form, field) |> error_id()
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def error_id(input_id) when is_binary(input_id), do: "#{input_id}_feedback"
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def input_class(form, field, classes \\ "") do
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case field_status(form, field) do
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:ok -> "#{classes} is-valid"
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:error -> "#{classes} is-invalid"
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_ -> classes
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end
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end
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defp field_status(form, field) do
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case field_has_data?(form, field) do
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true ->
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form.errors
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|> Keyword.get_values(field)
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|> Enum.empty?()
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|> case do
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true -> :ok
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false -> :error
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end
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false ->
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:default
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end
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end
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defp field_has_data?(form, field) when is_atom(field),
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do: field_has_data?(form, Atom.to_string(field))
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defp field_has_data?(form, field) when is_binary(field) do
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case Map.get(form.params, field) do
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nil -> false
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"" -> false
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_ -> true
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end
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end
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@doc """
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Translates an error message using gettext.
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"""
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def translate_error({msg, opts}) do
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# When using gettext, we typically pass the strings we want
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# to translate as a static argument:
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#
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# # Translate "is invalid" in the "errors" domain
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# dgettext("errors", "is invalid")
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#
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# # Translate the number of files with plural rules
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# dngettext("errors", "1 file", "%{count} files", count)
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#
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# Because the error messages we show in our forms and APIs
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# are defined inside Ecto, we need to translate them dynamically.
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# This requires us to call the Gettext module passing our gettext
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# backend as first argument.
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#
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# Note we use the "errors" domain, which means translations
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# should be written to the errors.po file. The :count option is
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# set by Ecto and indicates we should also apply plural rules.
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if count = opts[:count] do
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Gettext.dngettext(Bones73kWeb.Gettext, "errors", msg, msg, count, opts)
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else
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Gettext.dgettext(Bones73kWeb.Gettext, "errors", msg, opts)
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end
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end
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end
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