Policy Objects: Example

eligibleForSportsEnrollmentPolicy.js

var _ = require('underscore');
var PassingStudentPolicy = require('./passingStudentPolicy');

var SportsEligibilityPolicy = function(student) {
  this.student = student;
};

SportsEligibilityPolicy.prototype = _.extend(SportsEligibilityPolicy.prototype, {
  
  run: function() {
    return this.isNotExpelled() && this.isNotSuspended() && this.isPassing();
  },

  isNotExpelled: function() {
    return this.student.isExpelled !== true;
  },

  isNotSuspended: function() {
    return this.student.isSuspended !== true;
  },

  isPassing: function() {
    return new PassingStudentPolicy(this.student).run();
  }

});

module.exports = SportsEligibilityPolicy;