Status: Fill all MastoAPI required values in preview cards

changelog.d/previewcard-void-fill.fix

@@ -0,0 +1 @@
+Status: Fill all MastoAPI required values in preview cards

lib/pleroma/web/api_spec/schemas/status.ex

@@ -34,16 +34,40 @@ defmodule Pleroma.Web.ApiSpec.Schemas.Status do
         type: :object,
         nullable: true,
         description: "Preview card for links included within status content",
-        required: [:url, :title, :description, :type],
+        # Yeah, it's effectivelly all required in MastoAPI so far
+        required: [
+          :url,
+          :title,
+          :description,
+          :type,
+          :author_name,
+          :author_url,
+          :provider_name,
+          :provider_url,
+          :html,
+          :width,
+          :height,
+          :image,
+          :embed_url,
+          :blurhash
+        ],
         properties: %{
+          url: %Schema{type: :string, format: :uri, description: "Location of linked resource"},
+          title: %Schema{type: :string, description: "Title of linked resource"},
+          description: %Schema{type: :string, description: "Description of preview"},
           type: %Schema{
             type: :string,
             enum: ["link", "photo", "video", "rich"],
             description: "The type of the preview card"
           },
+          author_name: %Schema{type: :string, description: "author of the original resource"},
+          author_url: %Schema{
+            type: :string,
+            format: :uri,
+            description: "link to the author of the original resource"
+          },
           provider_name: %Schema{
             type: :string,
-            nullable: true,
             description: "The provider of the original resource"
           },
           provider_url: %Schema{
@@ -51,7 +75,13 @@ defmodule Pleroma.Web.ApiSpec.Schemas.Status do
             format: :uri,
             description: "A link to the provider of the original resource"
           },
-          url: %Schema{type: :string, format: :uri, description: "Location of linked resource"},
+          html: %Schema{
+            type: :string,
+            format: :html,
+            description: "HTML to be used for generating the preview card"
+          },
+          width: %Schema{type: :integer, description: "Width of preview, in pixels"},
+          height: %Schema{type: :integer, description: "Height of preview, in pixels"},
           image: %Schema{
             type: :string,
             nullable: true,
@@ -62,8 +92,17 @@ defmodule Pleroma.Web.ApiSpec.Schemas.Status do
             type: :string,
             description: "Alternate text that describes what is in the thumbnail"
           },
-          title: %Schema{type: :string, description: "Title of linked resource"},
+          embed_url: %Schema{
-          description: %Schema{type: :string, description: "Description of preview"}
+            type: :string,
+            format: :uri,
+            description: "Used for photo embeds, instead of custom `html`"
+          },
+          blurhash: %Schema{
+            type: :string,
+            nullable: true,
+            description:
+              "A hash computed by the (BlurHash algorithm)[https://github.com/woltapp/blurhash], for generating colorful preview thumbnails when media has not been downloaded yet."
+          }
         }
       },
       content: %Schema{type: :string, format: :html, description: "HTML-encoded status content"},

lib/pleroma/web/mastodon_api/views/status_view.ex

@@ -586,6 +586,13 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       image_description: rich_media["image:alt"] || "",
       title: rich_media["title"] || "",
       description: rich_media["description"] || "",
+      author_name: "",
+      author_url: "",
+      html: "",
+      width: 0,
+      height: 0,
+      embed_url: "",
+      blurhash: nil,
       pleroma: %{
         opengraph:
           rich_media

test/pleroma/web/mastodon_api/controllers/status_controller_test.exs

@@ -1687,7 +1687,14 @@ defmodule Pleroma.Web.MastodonAPI.StatusControllerTest do
             "description" =>
               "Directed by Michael Bay. With Sean Connery, Nicolas Cage, Ed Harris, John Spencer."
           }
-        }
+        },
+        "author_name" => "",
+        "author_url" => "",
+        "blurhash" => nil,
+        "embed_url" => "",
+        "height" => 0,
+        "html" => "",
+        "width" => 0
       }
 
       response =
@@ -1708,6 +1715,41 @@ defmodule Pleroma.Web.MastodonAPI.StatusControllerTest do
 
       assert response_two["card"] == card_data
     end
+
+    test "replaces missing description with an empty string", %{conn: conn, user: user} do
+      Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
+
+      {:ok, activity} = CommonAPI.post(user, %{status: "https://example.com/ogp-missing-data"})
+
+      response =
+        conn
+        |> get("/api/v1/statuses/#{activity.id}")
+        |> json_response_and_validate_schema(:ok)
+
+      assert response["card"] == %{
+               "type" => "link",
+               "title" => "Pleroma",
+               "description" => "",
+               "image" => nil,
+               "provider_name" => "example.com",
+               "provider_url" => "https://example.com",
+               "url" => "https://example.com/ogp-missing-data",
+               "pleroma" => %{
+                 "opengraph" => %{
+                   "title" => "Pleroma",
+                   "type" => "website",
+                   "url" => "https://example.com/ogp-missing-data"
+                 }
+               },
+               "author_name" => "",
+               "author_url" => "",
+               "blurhash" => nil,
+               "embed_url" => "",
+               "height" => 0,
+               "html" => "",
+               "width" => 0
+             }
+    end
   end
 
   test "bookmarks" do