/Gradebook/Scripts/app/class.result.js

/// <reference path="../knockout-2.2.1.debug.js" />

/// <reference path="../underscore-ko-1.2.2.js" />

/// <reference path="../underscore.js" />



function ClassResult(data) {

    this.studentId = data.StudentId;

    this.studentName = data.StudentName;



    var self = this;

    self.results = ko.observableArray();

    if (data.Results != null) {

        this.results($.map(data.Results, function (item) {

            var taskResult = new TaskResult(item);

            taskResult.result.subscribe(function () {

                self.results.notifySubscribers();

            });

            return new TaskResult(item);

        }));

    }

    self.rate = ko.computed(function () {

        var results = self.results();

        if (_.isNull(results) || _.isEmpty(results)) return 0;



        var tasksCount = results.length;

        var rateSum = _.reduce(results, function (memo, item) {

            var result = item.totalMarks > 1

                ? item.result() * 100 / item.totalMarks

                : item.result() * 100;

            return memo + result;

        }, 0);



        return tasksCount > 0 ? Math.round(rateSum / tasksCount) : 0;

    });

    self.hasResults = ko.computed(function(){

        var results = self.results();

        return !_.isNull(results) && !_.isEmpty(results);

    });



    self.getGrades = function () {

        if (!self.hasResults()) return [];



        return _.map(self.results(), function (item) {

            return item.toGrade();

        });

    };

}