Rails 2.3 to 4.x/5.x Codebase Migration

WARNING: This project pertains to a website providing SEXUALLY EXPLICIT / ADULT content. An operating system upgrade (CentOS 5.5 to 7) presents the need to upgrade outdated versions of ruby, rails, passenger, and several gems. Project consists of 3 primary goals: 1. upgrade codebase to support latest versions of ruby, rails, passenger, and all associated gems. 2. replace old video player (FlowPlayer) with new HTML5 or other mobile-friendly player 3. fix a bug with perl/cgi payment processing script *1: The code and the Rails version are quite old, so some parts must be replaced altogether. For example, the full text search feature on the site is powered by an old Rails gem called “acts_as_ferret,” which is no longer maintained and must be replaced with new code. The old version of Formtastic, which powers the front-end forms on the site, must be replaced with a new version, which now uses new API calls incompatible with the previous version. The server, Passenger, needs to be properly upgraded and tested with a new configuration. All old, deprecated gems will be replaced with new ones. All calls to deprecated features of the old Rails API must be replaced with new Rails API calls. Site using git for version control, capistrano for deployment, xsendfile for file-delivery from a 2nd physical server. *3: The rails site powers a mysql db of users - users should have a variable called "account_id" provided by the payment processor upon initial sign up that allows repeat customers to use a "quick pay" feature, or in other words authorize a charge to the card-on-file they initially signed up with. Payment processing scripts were written in perl/cgi and recently updated with the change of processors. As a result, the payment processor's "account_id" variable is not being stored to the DB, most likely an omission of changing the variable name defined by the previous processor to that of the new processor. More troubleshooting/testing may be needed to ensure function of the "quick pay" feature, but at present transaction processing works fine otherwise.