Merge branch 'feature/new-registrations-digest' into 'develop'

[akkoma] / lib / pleroma / web / rich_media / parser.ex

diff --git a/lib/pleroma/web/rich_media/parser.ex b/lib/pleroma/web/rich_media/parser.ex
index 4bd271d8e73cd54509a900faf8df8bdfe77f4b6f..9702e90f19b8ed02ce5569b2576731e204d0ab00 100644 (file)
--- a/lib/pleroma/web/rich_media/parser.ex
+++ b/lib/pleroma/web/rich_media/parser.ex
@@ -3,21 +3,20 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.RichMedia.Parser do
-  @parsers [
-    Pleroma.Web.RichMedia.Parsers.OGP,
-    Pleroma.Web.RichMedia.Parsers.TwitterCard,
-    Pleroma.Web.RichMedia.Parsers.OEmbed
-  ]
-
   @hackney_options [
     pool: :media,
     recv_timeout: 2_000,
-    max_body: 2_000_000
+    max_body: 2_000_000,
+    with_body: true
   ]
 
+  defp parsers do
+    Pleroma.Config.get([:rich_media, :parsers])
+  end
+
   def parse(nil), do: {:error, "No URL provided"}
 
-  if Mix.env() == :test do
+  if Pleroma.Config.get(:env) == :test do
     def parse(url), do: parse_url(url)
   else
     def parse(url) do
@@ -25,6 +24,7 @@ defmodule Pleroma.Web.RichMedia.Parser do
         Cachex.fetch!(:rich_media_cache, url, fn _ ->
           {:commit, parse_url(url)}
         end)
+        |> set_ttl_based_on_image(url)
       rescue
         e ->
           {:error, "Cachex error: #{inspect(e)}"}
@@ -32,19 +32,70 @@ defmodule Pleroma.Web.RichMedia.Parser do
     end
   end
 
+  @doc """
+  Set the rich media cache based on the expiration time of image.
+
+  Adopt behaviour `Pleroma.Web.RichMedia.Parser.TTL`
+
+  ## Example
+
+      defmodule MyModule do
+        @behaviour Pleroma.Web.RichMedia.Parser.TTL
+        def ttl(data, url) do
+          image_url = Map.get(data, :image)
+          # do some parsing in the url and get the ttl of the image
+          # and return ttl is unix time
+          parse_ttl_from_url(image_url)
+        end
+      end
+
+  Define the module in the config
+
+      config :pleroma, :rich_media,
+        ttl_setters: [MyModule]
+  """
+  def set_ttl_based_on_image({:ok, data}, url) do
+    with {:ok, nil} <- Cachex.ttl(:rich_media_cache, url),
+         ttl when is_number(ttl) <- get_ttl_from_image(data, url) do
+      Cachex.expire_at(:rich_media_cache, url, ttl * 1000)
+      {:ok, data}
+    else
+      _ ->
+        {:ok, data}
+    end
+  end
+
+  defp get_ttl_from_image(data, url) do
+    Pleroma.Config.get([:rich_media, :ttl_setters])
+    |> Enum.reduce({:ok, nil}, fn
+      module, {:ok, _ttl} ->
+        module.ttl(data, url)
+
+      _, error ->
+        error
+    end)
+  end
+
   defp parse_url(url) do
     try do
       {:ok, %Tesla.Env{body: html}} = Pleroma.HTTP.get(url, [], adapter: @hackney_options)
 
-      html |> maybe_parse() |> clean_parsed_data() |> check_parsed_data()
+      html
+      |> parse_html()
+      |> maybe_parse()
+      |> Map.put(:url, url)
+      |> clean_parsed_data()
+      |> check_parsed_data()
     rescue
       e ->
-        {:error, "Parsing error: #{inspect(e)}"}
+        {:error, "Parsing error: #{inspect(e)} #{inspect(__STACKTRACE__)}"}
     end
   end
 
+  defp parse_html(html), do: Floki.parse_document!(html)
+
   defp maybe_parse(html) do
-    Enum.reduce_while(@parsers, %{}, fn parser, acc ->
+    Enum.reduce_while(parsers(), %{}, fn parser, acc ->
       case parser.parse(html, acc) do
         {:ok, data} -> {:halt, data}
         {:error, _msg} -> {:cont, acc}
@@ -52,7 +103,8 @@ defmodule Pleroma.Web.RichMedia.Parser do
     end)
   end
 
-  defp check_parsed_data(%{title: title} = data) when is_binary(title) and byte_size(title) > 0 do
+  defp check_parsed_data(%{title: title} = data)
+       when is_binary(title) and byte_size(title) > 0 do
     {:ok, data}
   end