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Viewing changes to modules/org/openteacher/logic/wordsString/javaScript/checker/checker.js

  • Committer: Marten de Vries
  • Date: 2017-06-28 18:05:48 UTC
  • Revision ID: git-v1:b4c406307aa345c58b9904b76580f15c5bff2a4e
Move JS into npm modules

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modules/org/openteacher/logic/wordsString/javaScript/checker/checker.js
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/*
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        Copyright 2012-2013, Marten de Vries
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        This file is part of OpenTeacher.
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        OpenTeacher is free software: you can redistribute it and/or modify
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        it under the terms of the GNU General Public License as published by
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        the Free Software Foundation, either version 3 of the License, or
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        (at your option) any later version.
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        OpenTeacher is distributed in the hope that it will be useful,
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        but WITHOUT ANY WARRANTY; without even the implied warranty of
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        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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        GNU General Public License for more details.
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        You should have received a copy of the GNU General Public License
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        along with OpenTeacher.  If not, see <http://www.gnu.org/licenses/>.
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*/
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var check = (function () {
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        "use strict";
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        var calculateDifference, arrayValuesEqual,
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                checkSingleCompulsoryAnswerGiven,
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                checkMultipleCompulsoryAnswersGiven;
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        calculateDifference = function (a1, a2) {
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                return a1.filter(function (item) {
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                        return a2.indexOf(item) === -1;
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                });
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        };
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        arrayValuesEqual = function (a1, a2) {
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                var i, index;
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                //copy, it's going to be modified
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                a1 = a1.slice();
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                for (i = 0; i < a2.length; i += 1) {
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                        index = a1.indexOf(a2[i]);
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                        if (index === -1) {
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                                return false;
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                        }
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                        a1.splice(index, 1);
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                }
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                return a1.length === 0;
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        };
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        checkSingleCompulsoryAnswerGiven = function (givenAnswer, word) {
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                var result, difference, compulsoryAnswer, oldDifference, i;
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                result = {"result": "right"};
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                difference = givenAnswer[0];
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                for (i = 0; i < word.answers.length; i += 1) {
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                        compulsoryAnswer = word.answers[i];
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                        oldDifference = difference;
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                        difference = calculateDifference(difference, compulsoryAnswer);
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                        if (arrayValuesEqual(oldDifference, difference)) {
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                                result = {"result": "wrong"};
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                                break;
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                        }
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                }
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                if (result.result === "right" && difference.length !== 0) {
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                        result = {"result": "wrong"};
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                }
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                return result;
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        };
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        checkMultipleCompulsoryAnswersGiven = function (givenAnswer, word) {
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                var result, compulsoryAnswerCount, compulsoryGivenAnswer, difference, i, j, compulsoryAnswer;
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                result = {"result": "wrong"};
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                compulsoryAnswerCount = 0;
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                for (i = 0; i < givenAnswer.length; i += 1) {
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                        compulsoryGivenAnswer = givenAnswer[i];
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                        for (j = 0; j < word.answers.length; j += 1) {
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                                compulsoryAnswer = word.answers[j];
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                                difference = calculateDifference(compulsoryGivenAnswer, compulsoryAnswer);
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                                if (difference.length === 0) {
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                                        compulsoryAnswerCount += 1;
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                                }
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                        }
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                }
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                if (compulsoryAnswerCount === word.answers.length) {
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                        result = {"result": "right"};
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                }
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                return result;
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        };
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        return function (givenAnswer, word) {
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                var result;
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                if (givenAnswer.length === 1) {
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                        result = checkSingleCompulsoryAnswerGiven(givenAnswer, word);
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                } else {
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                        result = checkMultipleCompulsoryAnswersGiven(givenAnswer, word);
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                }
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                result.itemId = word.id;
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                return result;
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        };
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}());