Full-text search for authorized statuses (#6423)

* Add full-text search for authorized statuses

- Search API will return statuses that match the query
- Only for logged in users
- Only if you are author of the status,
- Or you were mentioned in it
- Or you favourited or reblogged it
- Configuration over `ES_ENABLED`, `ES_HOST`, `ES_PORT`, `ES_PREFIX`
- Run `rails chewy:deploy` to create & populate index

Fix #5880
Fix #4293
Fix #1152

* Add commented out docker-compose configuration for ES container

* Optimize index import, filter search results

* Add basic normalization to the index

* Add better stemming and normalization to the index

* Skip webfinger request if search query includes both @ and a space

* Fix code style

* Visually separate search result sections

* Fix code style issues

app/models/status.rb

@@ -31,6 +31,8 @@ class Status < ApplicationRecord
   include Cacheable
   include StatusThreadingConcern
 
+  update_index('statuses#status', :proper) if Chewy.enabled?
+
   enum visibility: [:public, :unlisted, :private, :direct], _suffix: :visibility
 
   belongs_to :application, class_name: 'Doorkeeper::Application', optional: true
@@ -78,6 +80,22 @@ class Status < ApplicationRecord
 
   delegate :domain, to: :account, prefix: true
 
+  def searchable_by(preloaded = nil)
+    ids = [account_id]
+
+    if preloaded.nil?
+      ids += mentions.pluck(:account_id)
+      ids += favourites.pluck(:account_id)
+      ids += reblogs.pluck(:account_id)
+    else
+      ids += preloaded.mentions[id] || []
+      ids += preloaded.favourites[id] || []
+      ids += preloaded.reblogs[id] || []
+    end
+
+    ids.uniq
+  end
+
   def reply?
     !in_reply_to_id.nil? || attributes['reply']
   end