main.js

var handlers = {
    "GetAttemptedQuizDetails": detailPageHandler,
    "PopulateSingleQuiz": McqPageHandler,
}

String.prototype.hashCode = function () {
    var hash = 0, i, chr;
    if (this.length === 0) return hash;
    for (i = 0; i < this.length; i++) {
        chr = this.charCodeAt(i);
        hash = ((hash << 5) - hash) + chr;
        hash |= 0; // Convert to 32bit integer
    }
    return hash;
}

function main() {
    for (var handler in handlers) {
        var re = new RegExp(handler, "i");
        if (re.exec(window.location.pathname)) {
            handlers[handler]();
        }
    }
}

function detailPageHandler() {
    var qDict = JSON.parse(localStorage['qDict'] || '{}');
    var parser = new QuizDetailParser();
    var questions = parser.parse(document);

    for(var question of questions){
        var mcq = MCQ.loadFromObj(question);
        var savedMcq = mcq.existsIn(qDict);
        if (savedMcq) {
            savedMcq.updateAnsFromText(question.correctAns)
            qDict[savedMcq.getHash()] = savedMcq.getJSON();
    
            console.log(`UPDATED: ${question.text.innerText}`);
        }
    }
    
    localStorage['qDict'] = JSON.stringify(qDict);
}

function McqPageHandler() {
    var qDict = JSON.parse(localStorage['qDict'] || '{}');
    var parser = new McqParser();
    var parsedMcq = parser.parse(document);
    var savedMcq = parsedMcq.existsIn(qDict)

    if (savedMcq) {
        parsedMcq.mark(savedMcq.ans);
        console.log("Question found");
        console.log("Known correct option marked");
    }

    else {
        console.log("Question not found");

        document.querySelector(`.submit_btn`).setAttribute('onclick', '')
        document.querySelectorAll("[name='quiz_option']")
            .forEach((el) => {
                el.addEventListener("click", (e) => {
                    parsedMcq.setAns(e.target.value);
                });
            });

        document.querySelector(`.submit_btn`)
            .addEventListener("click", () => {
                qDict[parsedMcq.getHash()] = parsedMcq.getJSON();
                localStorage['qDict'] = JSON.stringify(qDict);
                document.forms[0].submit();
            })
    }
}

main();