Add emoji policy to remove emojis matching certain urls

https://git.pleroma.social/pleroma/pleroma/-/issues/2775

test/pleroma/web/activity_pub/mrf/emoji_policy_test.exs

@@ -0,0 +1,123 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.MRF.EmojiPolicyTest do
+  use Pleroma.DataCase
+
+  alias Pleroma.Web.ActivityPub.MRF
+  alias Pleroma.Web.ActivityPub.MRF.EmojiPolicy
+
+  setup do: clear_config(:mrf_emoji)
+
+  setup do
+    clear_config([:mrf_emoji], %{
+      remove_url: [],
+      remove_shortcode: [],
+      federated_timeline_removal_url: [],
+      federated_timeline_removal_shortcode: []
+    })
+  end
+
+  @emoji_tags [
+    %{
+      "icon" => %{
+        "type" => "Image",
+        "url" => "https://example.org/emoji/biribiri/mikoto_smile2.png"
+      },
+      "id" => "https://example.org/emoji/biribiri/mikoto_smile2.png",
+      "name" => ":mikoto_smile2:",
+      "type" => "Emoji",
+      "updated" => "1970-01-01T00:00:00Z"
+    },
+    %{
+      "icon" => %{
+        "type" => "Image",
+        "url" => "https://example.org/emoji/biribiri/mikoto_smile3.png"
+      },
+      "id" => "https://example.org/emoji/biribiri/mikoto_smile3.png",
+      "name" => ":mikoto_smile3:",
+      "type" => "Emoji",
+      "updated" => "1970-01-01T00:00:00Z"
+    },
+    %{
+      "icon" => %{
+        "type" => "Image",
+        "url" => "https://example.org/emoji/nekomimi_girl_emoji/nekomimi_girl_emoji_007.png"
+      },
+      "id" => "https://example.org/emoji/nekomimi_girl_emoji/nekomimi_girl_emoji_007.png",
+      "name" => ":nekomimi_girl_emoji_007:",
+      "type" => "Emoji",
+      "updated" => "1970-01-01T00:00:00Z"
+    },
+    %{
+      "icon" => %{
+        "type" => "Image",
+        "url" => "https://example.org/test.png"
+      },
+      "id" => "https://example.org/test.png",
+      "name" => ":test:",
+      "type" => "Emoji",
+      "updated" => "1970-01-01T00:00:00Z"
+    }
+  ]
+
+  @misc_tags [%{"type" => "Placeholder"}]
+
+  @user_data %{
+    "type" => "Person",
+    "id" => "https://example.org/placeholder",
+    "name" => "lol",
+    "tag" => @emoji_tags ++ @misc_tags
+  }
+
+  @status_data %{
+    "type" => "Create",
+    "object" => %{
+      "type" => "Note",
+      "id" => "https://example.org/placeholder",
+      "content" => "lol",
+      "tag" => @emoji_tags ++ @misc_tags,
+      "emoji" => %{
+        "mikoto_smile2" => "https://example.org/emoji/biribiri/mikoto_smile2.png",
+        "mikoto_smile3" => "https://example.org/emoji/biribiri/mikoto_smile3.png",
+        "nekomimi_girl_emoji_007" =>
+          "https://example.org/emoji/nekomimi_girl_emoji/nekomimi_girl_emoji_007.png",
+        "test" => "https://example.org/test.png"
+      }
+    }
+  }
+
+  describe "remove_url" do
+    setup do
+      clear_config([:mrf_emoji, :remove_url], [
+        "https://example.org/test.png",
+        ~r{/biribiri/mikoto_smile[23]\.png},
+        "nekomimi_girl_emoji"
+      ])
+
+      :ok
+    end
+
+    test "processes user" do
+      {:ok, filtered} = MRF.filter_one(EmojiPolicy, @user_data)
+
+      expected_tags = [@emoji_tags |> Enum.at(2)] ++ @misc_tags
+
+      assert %{"tag" => ^expected_tags} = filtered
+    end
+
+    test "processes status" do
+      {:ok, filtered} = MRF.filter_one(EmojiPolicy, @status_data)
+
+      expected_tags = [@emoji_tags |> Enum.at(2)] ++ @misc_tags
+
+      expected_emoji = %{
+        "nekomimi_girl_emoji_007" =>
+          "https://example.org/emoji/nekomimi_girl_emoji/nekomimi_girl_emoji_007.png"
+      }
+
+      assert %{"object" => %{"tag" => ^expected_tags, "emoji" => ^expected_emoji}} = filtered
+    end
+  end
+end