Add remote interaction dialog for toots (#8202)

* Add remote interaction dialog for toots

* Change AuthorizeFollow into AuthorizeInteraction, support statuses

* Update brakeman.ignore

* Adjust how interaction buttons are display on public pages

* Fix tests

app/controllers/authorize_interactions_controller.rb

@@ -0,0 +1,66 @@
+# frozen_string_literal: true
+
+class AuthorizeInteractionsController < ApplicationController
+  include Authorization
+
+  layout 'modal'
+
+  before_action :authenticate_user!
+  before_action :set_body_classes
+  before_action :set_resource
+
+  def show
+    if @resource.is_a?(Account)
+      render :show
+    elsif @resource.is_a?(Status)
+      redirect_to web_url("statuses/#{@resource.id}")
+    else
+      render :error
+    end
+  end
+
+  def create
+    if @resource.is_a?(Account) && FollowService.new.call(current_account, @resource)
+      render :success
+    else
+      render :error
+    end
+  rescue ActiveRecord::RecordNotFound, Mastodon::NotPermittedError
+    render :error
+  end
+
+  private
+
+  def set_resource
+    @resource = located_resource || render(:error)
+    authorize(@resource, :show?) if @resource.is_a?(Status)
+  end
+
+  def located_resource
+    if uri_param_is_url?
+      ResolveURLService.new.call(uri_param)
+    else
+      account_from_remote_follow
+    end
+  end
+
+  def account_from_remote_follow
+    ResolveAccountService.new.call(uri_param)
+  end
+
+  def uri_param_is_url?
+    parsed_uri.path && %w(http https).include?(parsed_uri.scheme)
+  end
+
+  def parsed_uri
+    Addressable::URI.parse(uri_param).normalize
+  end
+
+  def uri_param
+    params[:uri] || params.fetch(:acct, '').gsub(/\Aacct:/, '')
+  end
+
+  def set_body_classes
+    @body_classes = 'modal-layout'
+  end
+end