Refactor formatter (#17828)

* Refactor formatter

* Move custom emoji pre-rendering logic to view helpers

* Move more methods out of Formatter

* Fix code style issues

* Remove Formatter

* Add inline poll options to RSS feeds

* Remove unused helper method

* Fix code style issues

* Various fixes and improvements

* Fix test

spec/lib/plain_text_formatter_spec.rb

@@ -0,0 +1,24 @@
+require 'rails_helper'
+
+RSpec.describe PlainTextFormatter do
+  describe '#to_s' do
+    subject { described_class.new(status.text, status.local?).to_s }
+
+    context 'given a post with local status' do
+      let(:status) { Fabricate(:status, text: '<p>a text by a nerd who uses an HTML tag in text</p>', uri: nil) }
+
+      it 'returns the raw text' do
+        is_expected.to eq '<p>a text by a nerd who uses an HTML tag in text</p>'
+      end
+    end
+
+    context 'given a post with remote status' do
+      let(:remote_account) { Fabricate(:account, domain: 'remote.test', username: 'bob', url: 'https://remote.test/') }
+      let(:status) { Fabricate(:status, account: remote_account, text: '<p>Hello</p><script>alert("Hello")</script>') }
+
+      it 'returns tag-stripped text' do
+        is_expected.to eq 'Hello'
+      end
+    end
+  end
+end