CS558 Database Module.
This module exposes a constructor to the ClassDB object, which handles all of the reading/writing entries in the db. It is built ontop of level.
var classdb = ;//create new ClassDB instancevar db = pathToDataBase;//add a new student to the database with name "name", "password", and a//callback function that is called after the student database operations.//callback will be called with at most one argument -- an error string.db;//Store student submission sources for each attempt. The callback function//is called with at most one argument -- an error string. Src should be a//Buffer. It is similar usage for putAssignmentScore.db;//Similarly we can use db to acccess assignment scores and sources, with//db.getAssignmentScore and db.getAssignmentSrc respectively. Takes a//call back as argument, and will be passed an error string as the first//argument if there is an error, otherwise the second argument passed will be//the score(or source for getAssignmentSrc). db.getMaxAssignmentScore is//similar but doesn't take an attempt argument.db;//db.verifyStudent takes a name, password and callback and verifies the//the password name combination, and passes an error to callback if there//is an error.db;