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defmodule Nola.Plugins.Link.YouTube do
@behaviour Nola.Plugins.Link
@moduledoc """
# YouTube link preview
needs an API key:
```
config :nola, :youtube,
api_key: "xxxxxxxxxxxxx"
```
options:
* `invidious`: Add a link to invidious.
"""
@impl true
def match(uri = %URI{host: yt, path: "/watch", query: "v="<>video_id}, _opts) when yt in ["youtube.com", "www.youtube.com"] do
{true, %{video_id: video_id}}
end
def match(%URI{host: "youtu.be", path: "/"<>video_id}, _opts) do
{true, %{video_id: video_id}}
end
def match(_, _), do: false
@impl true
def post_match(_, _, _, _), do: false
@impl true
def expand(uri, %{video_id: video_id}, opts) do
key = Application.get_env(:nola, :youtube)[:api_key]
params = %{
"part" => "snippet,contentDetails,statistics",
"id" => video_id,
"key" => key
}
headers = []
options = [params: params]
case HTTPoison.get("https://www.googleapis.com/youtube/v3/videos", [], options) do
{:ok, %HTTPoison.Response{status_code: 200, body: body}} ->
case Jason.decode(body) do
{:ok, json} ->
item = List.first(json["items"])
if item do
snippet = item["snippet"]
duration = item["contentDetails"]["duration"] |> String.replace("PT", "") |> String.downcase
date = snippet["publishedAt"]
|> DateTime.from_iso8601()
|> elem(1)
|> Timex.format("{relative}", :relative)
|> elem(1)
line = if host = Keyword.get(opts, :invidious) do
["-> https://#{host}/watch?v=#{video_id}"]
else
[]
end
{:ok, line ++ ["#{snippet["title"]}", "— #{duration} — uploaded by #{snippet["channelTitle"]} — #{date}"
<> " — #{item["statistics"]["viewCount"]} views, #{item["statistics"]["likeCount"]} likes"]}
else
:error
end
_ -> :error
end
end
end
end

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