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GPACalculator

Calculate GPA on plus portals

目前为 2023-09-07 提交的版本。查看 最新版本。

// ==UserScript==
// @name         GPACalculator
// @version      0.1
// @description  Calculate GPA on plus portals
// @author       Andrew Miller
// @match        https://plusportals.com/ParentStudentDetails/ParentStudentDetails/9754
// @grant        none
// @run-at       document-idle
// @license      MIT
// @namespace https://greasyfork.org/users/1167790
// ==/UserScript==

(function() {
    'use strict';

    const gpaWeights = {
  "A+": 4.33,
  "A": 4.17,
  "A-": 4.00,
  "B+": 3.67,
  "B": 3.33,
  "B-": 3.00,
  "C+": 2.67,
  "C": 2.33,
  "C-": 2.00,
  "D+": 1.67,
  "D": 1.33,
  "D-": 1.00,
  "F": 0.00
};
const checkElements = () => {
    const elements = document.querySelectorAll('[title="Subject"], [title="Grade"]');
    if(elements.length > 0) {
        clearInterval(intervalId);
        const subjectGradePairs = {};
        let currentSubject = '';
        let currentGrade = '';
        let totalGPA = 0;
        let elementCount = 0;

        elements.forEach(element => {
            const title = element.getAttribute('title');

            if (title === 'Subject') {
                currentSubject = element.textContent.trim();
            } else if (title === 'Grade') {
                currentGrade = element.textContent.trim();
                subjectGradePairs[currentSubject] = currentGrade;

                let gradeWeight = gpaWeights.hasOwnProperty(currentGrade) ? gpaWeights[currentGrade] : 0;

                if ((currentSubject.includes('Hnrs') || currentSubject.includes('Hon')) && gradeWeight >= 2.00) {
                    gradeWeight += 1;
                }

                totalGPA += gradeWeight;
                elementCount++;
            }
        });

        const averageGPA = elementCount > 0 ? (totalGPA / elementCount).toFixed(2) : 0;

        console.log("Average GPA:", averageGPA);

        function getLetterGrade(gpa) {
            let letterGrade = 'F'; // Default to F
            for (const [grade, weight] of Object.entries(gpaWeights)) {
                if (gpa >= weight) {
                    letterGrade = grade;
                    break;
                }
            }
            return letterGrade;
        }

        let tbody = document.querySelector('tbody[role="rowgroup"]');


        let newRow = document.createElement('tr');
        let newCell1 = document.createElement('td');
        let newCell2 = document.createElement('td');
        let newCell3 = document.createElement('td');


        newRow.setAttribute('role', 'row');
        newCell1.setAttribute('role', 'gridcell');
        newCell2.setAttribute('role', 'gridcell');
        newCell3.setAttribute('role', 'gridcell');


        newRow.setAttribute('role', 'row');
        newCell1.setAttribute('role', 'gridcell');
        newCell2.setAttribute('role', 'gridcell');
        newCell3.setAttribute('role', 'gridcell');

        newCell1.innerHTML = 'Total GPA';
        newCell2.innerHTML = averageGPA;
        newCell3.innerHTML = getLetterGrade(averageGPA);


        newRow.appendChild(newCell1);
        newRow.appendChild(newCell2);
        newRow.appendChild(newCell3);


        if (tbody.firstChild) {
            tbody.insertBefore(newRow, tbody.firstChild);
        } else {
            tbody.appendChild(newRow);
        }
    }
}
const intervalId = setInterval(checkElements, 750);
})();