philomena/lib/philomena_proxy/scrapers/bluesky.ex
Yay295 a08510f21e Add Bluesky scraper (#290)
* add bluesky scraper

* use com.atproto.sync.getBlob to get original bluesky image

* ignore data after bluesky post id

* fix json access and missing function

* fix bluesky fullsize image regex
2024-10-28 16:14:48 -04:00

48 lines
1.6 KiB
Elixir

defmodule PhilomenaProxy.Scrapers.Bluesky do
@moduledoc false
alias PhilomenaProxy.Scrapers.Scraper
alias PhilomenaProxy.Scrapers
@behaviour Scraper
@url_regex ~r|https://bsky\.app/profile/([^/]+)/post/([^/?#]+)|
@fullsize_image_regex ~r|.*/img/feed_fullsize/plain/([^/]+)/([^@]+).*|
@blob_image_url_pattern "https://bsky.social/xrpc/com.atproto.sync.getBlob/?did=\\1&cid=\\2"
@spec can_handle?(URI.t(), String.t()) :: boolean()
def can_handle?(_uri, url) do
String.match?(url, @url_regex)
end
@spec scrape(URI.t(), Scrapers.url()) :: Scrapers.scrape_result()
def scrape(_uri, url) do
[handle, id] = Regex.run(@url_regex, url, capture: :all_but_first)
api_url_resolve_handle =
"https://public.api.bsky.app/xrpc/com.atproto.identity.resolveHandle?handle=#{handle}"
did = PhilomenaProxy.Http.get(api_url_resolve_handle) |> json!() |> Map.fetch!(:did)
api_url_get_posts =
"https://public.api.bsky.app/xrpc/app.bsky.feed.getPosts?uris=at://#{did}/app.bsky.feed.post/#{id}"
post_json = PhilomenaProxy.Http.get(api_url_get_posts) |> json!() |> Map.fetch!(:posts) |> hd
%{
source_url: url,
author_name: post_json["author"]["handle"],
description: post_json["record"]["text"],
images:
post_json["embed"]["images"]
|> Enum.map(
&%{
url: String.replace(&1["fullsize"], @fullsize_image_regex, @blob_image_url_pattern),
camo_url: PhilomenaProxy.Camo.image_url(&1["thumb"])
}
)
}
end
defp json!({:ok, %{body: body, status: 200}}), do: Jason.decode!(body)
end