Refactor searchBrain() method
Rename "searchBrain" method to "getResponse"
Pass 'excluded responses' array to getResponse() instead of a conversation object
Don't beautify output within the getResponse() and failSearch() methods
Rename beautifySentence() method to beautifyInput()
Rename failSearch() method to getInputToLearn()
Refactor getInputToLearn() and make it more random
Beautify the output in one location
Move input related methods into their own repository class
Move connection related methods into their own repository class
Add connection entity class
Add findById() method to connections repository
Migrate from MySQL to PDO