Merge branch 'mastoapi-stop-capping-attachments' into 'develop'

Remove a limit on attachments in Mastodon API and document the changes in responses from vanilla Mastodon

See merge request pleroma/pleroma!834

docs/Differences-in-MastodonAPI-Responses.md

+# Differences in Mastodon API responses from vanilla Mastodon
+
+A Pleroma instance can be identified by "<Mastodon version> (compatible; Pleroma <version>)" present in `version` field in response from `/api/v1/instance` 
+
+## Flake IDs
+
+Pleroma uses 128-bit ids as opposed to Mastodon's 64 bits. However just like Mastodon's ids they are sortable strings
+
+## Attachment cap
+
+Some apps operate under the assumption that no more than 4 attachments can be returned or uploaded. Pleroma however does not enforce any limits on attachment count neither when returning the status object nor when posting.

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

@@ -166,7 +166,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       sensitive: sensitive,
       spoiler_text: object["summary"] || "",
       visibility: get_visibility(object),
-      media_attachments: attachments |> Enum.take(4),
+      media_attachments: attachments,
       mentions: mentions,
       tags: build_tags(tags),
       application: %{

mix.exs

@@ -21,7 +21,13 @@ defmodule Pleroma.Mixfile do
       homepage_url: "https://pleroma.social/",
       docs: [
         logo: "priv/static/static/logo.png",
-        extras: ["README.md", "docs/config.md", "docs/Pleroma-API.md", "docs/Admin-API.md"],
+        extras: [
+          "README.md",
+          "docs/config.md",
+          "docs/Pleroma-API.md",
+          "docs/Admin-API.md",
+          "docs/Differences-in-MastodonAPI-Responses.md"
+        ],
         main: "readme",
         output: "priv/static/doc"
       ]