ELHC 472 Game Production and Development

// This function checks if one string contains all words from another string, regardless of order
function containsAllWords(container, contained) {
    var containerWords = container.split(" ");
    var containedWords = contained.split(" ");
    return containedWords.every(word => containerWords.includes(word));
}

// This function checks the learner's answer against alternative answers
function checkAlternativeAnswers(player, learnerAnswer) {
    var altAnswers = [
        player.GetVar("Alt_Answer1"),
        player.GetVar("Alt_Answer2"),
        player.GetVar("Alt_Answer3"),
        player.GetVar("Alt_Answer4")
    ];

    var processedLearnerAnswer = processAnswer(learnerAnswer);

    for (var i = 0; i < altAnswers.length; i++) {
        if (altAnswers[i] && altAnswers[i].trim() !== "") {
            var processedAltAnswer = processAnswer(altAnswers[i]);
            if (containsAllWords(processedLearnerAnswer, processedAltAnswer) ||
                containsAllWords(processedAltAnswer, processedLearnerAnswer)) {
                player.SetVar("Accuracy_Score", 90);
                player.SetVar("Contains_Correct_Answer", false);
                return true; // Match found, terminate further checks
            }
        }
    }
    return false; // No match found
}

// This is the main function that compares the learner's answer to the correct answer
function compareAnswers() {
    var player = GetPlayer();
    var learnerAnswer = player.GetVar("Learner_Answer");
    var correctAnswer = player.GetVar("Correct_Answer");

    var processedLearnerAnswer = processAnswer(learnerAnswer);
    var processedCorrectAnswer = processAnswer(correctAnswer);

    // Check for exact match first
    if (processedLearnerAnswer === processedCorrectAnswer) {
        player.SetVar("Accuracy_Score", 100);
        player.SetVar("Contains_Correct_Answer", true);
        return;
    }

    // Check for partial match with correct answer
    if (containsAllWords(processedLearnerAnswer, processedCorrectAnswer) ||
        containsAllWords(processedCorrectAnswer, processedLearnerAnswer)) {
        player.SetVar("Accuracy_Score", 90);
        player.SetVar("Contains_Correct_Answer", true);
        return;
    }

    // Check against alternative answers
    if (checkAlternativeAnswers(player, learnerAnswer)) {
        return; // If alternative answer matched, terminate the function
    }

    // Calculate partial score for incorrect answers
    var partialScore = calculatePartialScore(processedLearnerAnswer, processedCorrectAnswer);
    player.SetVar("Accuracy_Score", partialScore);
    player.SetVar("Contains_Correct_Answer", false);

    if (partialScore === 0) {
        brieflyChangeScore(player);
    }
}

// This function cleans up the answers for easier comparison
function processAnswer(answer) {
    return answer.replace(/[.,\/#!$%\^&\*;:{}=\-_`~()]/g, "").trim().toUpperCase().replace(/\s+/g, " ");
}

// Function to calculate partial scores, capped at 89%
function calculatePartialScore(learnerAnswer, correctAnswer) {
    var learnerWords = learnerAnswer.split(" ");
    var correctWords = correctAnswer.split(" ");
    var matchedWords = correctWords.filter(word => learnerWords.includes(word));
    var score = Math.round((matchedWords.length / correctWords.length) * 89);
    return score > 0 ? score : 0; // Ensure we don't return a negative score
}

// This function briefly changes the score from 0% to 1% and back
function brieflyChangeScore(player) {
    player.SetVar("Accuracy_Score", 1);
    setTimeout(function() {
        player.SetVar("Accuracy_Score", 0);
    }, 50);
}

// This line runs the main function when the script is executed
compareAnswers();