Claudio Ortolina
62 lines
1.4 KiB
Elixir
62 lines
1.4 KiB
Elixir
defmodule MusicLibraryWeb.Duration do
|
|
@moduledoc """
|
|
Formats durations from milliseconds to human-readable strings.
|
|
"""
|
|
|
|
@doc """
|
|
Formats a duration in milliseconds as a human-readable string.
|
|
|
|
## Examples
|
|
|
|
iex> MusicLibraryWeb.Duration.format_duration(30_000)
|
|
"0:30"
|
|
|
|
iex> MusicLibraryWeb.Duration.format_duration(90_000)
|
|
"1:30"
|
|
|
|
iex> MusicLibraryWeb.Duration.format_duration(3_723_000)
|
|
"1:02:03"
|
|
|
|
iex> MusicLibraryWeb.Duration.format_duration(0)
|
|
"0:00"
|
|
|
|
"""
|
|
def format_duration(milliseconds) do
|
|
milliseconds
|
|
|> System.convert_time_unit(:millisecond, :second)
|
|
|> format_seconds()
|
|
end
|
|
|
|
defp format_seconds(seconds) when seconds <= 59 do
|
|
"0:#{zero_pad(seconds)}"
|
|
end
|
|
|
|
defp format_seconds(seconds) do
|
|
minutes = div(seconds, 60)
|
|
remaining_seconds = rem(seconds, 60)
|
|
|
|
format_minutes(minutes, remaining_seconds)
|
|
end
|
|
|
|
defp format_minutes(minutes, seconds) when minutes <= 59 do
|
|
"#{minutes}:#{zero_pad(seconds)}"
|
|
end
|
|
|
|
defp format_minutes(minutes, seconds) do
|
|
hours = div(minutes, 60)
|
|
remaining_minutes = rem(minutes, 60)
|
|
|
|
format_hours(hours, remaining_minutes, seconds)
|
|
end
|
|
|
|
defp format_hours(hours, minutes, seconds) do
|
|
"#{hours}:#{zero_pad(minutes)}:#{zero_pad(seconds)}"
|
|
end
|
|
|
|
defp zero_pad(integer) do
|
|
integer
|
|
|> to_string()
|
|
|> String.pad_leading(2, "0")
|
|
end
|
|
end
|