Build a Ruby class that accepts & parses CSV and saves to PostgreSQL

Build a Ruby class that accepts a timesheet in excel/CSV spreadsheet format as a Ruby IO object, parses it, and saves work hours into the database. Essential skills: Ruby on Rails, AWS::S3, HTML/CSS We will provide information on DB schema and git/bitbucket info for dev environment. Detail info: Each work period should be added as an ActiveRecord Task Each task is associated with an Activity based on information in the spreadsheets. New activities are created if necessary. Importer will eventually be exposed to users through an Admin GUI This is part of a larger project, and there will be potential for further development work. Larger project: MDL is a Rails 4 app running on Postgresql. It consists of: 1. A series of rake tasks downloading data from multiple external services and collating it into a unified format in our database. 2. Infrastructure for generating reports on hourly/daily/monthly/yearly time expenditure. These reports are long-running processes and their results will need to be cached for later delivery to web clients. 3. A public-facing dashboard including interactive graphs that show User's recent activities, as well as longer-term reports. These data visualizations are generated in-browser using d3.js and draw from JSON files generated by server-side reporting infrastructure 4. An admin control panel allowing privileged users to categorize and prioritize various types of tasks, and set precedence for cases where two tasks occur simultaneously If you think the budget needs to be more than $250 I may consider those bids.