83 lines
2.7 KiB
Elixir
83 lines
2.7 KiB
Elixir
defmodule LokalWeb.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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import Phoenix.Component
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alias Ecto.Changeset
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alias Phoenix.{HTML.Form, LiveView.Rendered}
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@doc """
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Generates tag for inlined form input errors.
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"""
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@spec error_tag(Form.t(), Form.field()) :: Rendered.t()
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@spec error_tag(Form.t(), Form.field(), String.t()) :: Rendered.t()
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def error_tag(form, field, extra_class \\ "") do
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assigns = %{extra_class: extra_class, form: form, field: field}
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~H"""
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<%= for error <- Keyword.get_values(@form.errors, @field) do %>
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<span class={["invalid-feedback", @extra_class]} phx-feedback-for={input_name(@form, @field)}>
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<%= translate_error(error) %>
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</span>
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<% end %>
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"""
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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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@spec translate_error({String.t(), keyword() | map()}) :: String.t()
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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(LokalWeb.Gettext, "errors", msg, msg, count, opts)
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else
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Gettext.dgettext(LokalWeb.Gettext, "errors", msg, opts)
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end
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end
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@doc """
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Displays all errors from a changeset, or just for a single key
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"""
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@spec changeset_errors(Changeset.t()) :: String.t()
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@spec changeset_errors(Changeset.t(), key :: atom()) :: [String.t()] | nil
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def changeset_errors(changeset) do
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changeset
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|> changeset_error_map()
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|> Enum.map_join(". ", fn {key, errors} ->
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"#{key |> humanize()}: #{errors |> Enum.join(", ")}"
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end)
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end
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def changeset_errors(changeset, key) do
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changeset |> changeset_error_map() |> Map.get(key)
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end
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@doc """
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Displays all errors from a changeset in a key value map
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"""
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@spec changeset_error_map(Changeset.t()) :: %{atom() => [String.t()]}
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def changeset_error_map(changeset) do
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changeset
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|> Changeset.traverse_errors(fn error -> error |> translate_error() end)
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end
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end
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