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Duskmoon UI component library for Phoenix LiveView
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lib/phoenix_duskmoon/component/helpers.ex
defmodule PhoenixDuskmoon.Component.Helpers do
@moduledoc false
@doc """
Maps the `"accent"` color name to the `"tertiary"` CSS token
used by `@duskmoon-dev/core`, passing all other values through.
"""
def css_color("accent"), do: "tertiary"
def css_color(color), do: color
@doc """
Interpolates `{key}` placeholders in a template string with values from a map.
Used for i18n-friendly aria-label templates.
## Examples
iex> format_label("Rate {index} out of {max}", %{"index" => 3, "max" => 5})
"Rate 3 out of 5"
"""
def format_label(template, vars) do
Enum.reduce(vars, template, fn {key, val}, acc ->
String.replace(acc, "{#{key}}", to_string(val))
end)
end
@doc """
Splits a value string into a list of graphemes, taking at most `length` items.
Returns an empty list for `nil` or non-binary values.
## Examples
iex> split_value("1234", 4)
["1", "2", "3", "4"]
iex> split_value("12", 4)
["1", "2"]
iex> split_value(nil, 4)
[]
"""
def split_value(nil, _length), do: []
def split_value(value, length) when is_binary(value) do
value |> String.graphemes() |> Enum.take(length)
end
def split_value(_, _length), do: []
end