Mathswatch Autosolver

Takes a screenshot of Mathswatch question images, sends it to Gemini, and displays the answer in a beautifully styled new tab.
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// ==UserScript==
// @name         Mathswatch Autosolver 
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Takes a screenshot of Mathswatch question images, sends it to Gemini, and displays the answer in a beautifully styled new tab.
// @author       Your Name
// @match        https://vle.mathswatch.co.uk/*
// @grant        GM_openInTab
// @grant        GM_xmlhttpRequest
// @grant        GM_getValue
// @grant        GM_setValue
// @license      MIT
// ==/UserScript==
 
(function () {
    'use strict';
 
    const GEMINI_API_KEY_KEY = 'Your-Google-API-Key-Here';
    let geminiApiKey = GM_getValue(GEMINI_API_KEY_KEY, null);
    const GEMINI_API_URL = 'https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-pro-latest:generateContent?key=';
    const DEFAULT_PROMPT = "Analyze the image and identify any questions. Answer the questions with as much detail as possible. Show your reasoning.";
    const ADDITIONAL_PROMPT_MESSAGE = "Enter any additional instructions or questions to send with the image (or leave blank for default prompt):";
 
    async function checkApiKey() {
        if (!geminiApiKey) {
            geminiApiKey = prompt("Enter your Google AI Studio API Key:");
            if (geminiApiKey) {
                GM_setValue(GEMINI_API_KEY_KEY, geminiApiKey);
                alert("API key saved. Press Ctrl+X again to process the question.");
            } else {
                alert("API key required for the script to function.");
            }
            return false;
        }
        return true;
    }
 
    async function captureScreenshot() {
        if (typeof html2canvas === "undefined") {
            await new Promise(resolve => {
                const script = document.createElement("script");
                script.src = "https://html2canvas.hertzen.com/dist/html2canvas.min.js";
                script.onload = resolve;
                document.head.appendChild(script);
            });
        }
 
        // Capture only the images with the class 'img-responsive col-xs-12 img-question'
        const imageElements = document.querySelectorAll('img.img-responsive.col-xs-12.img-question');
        if (imageElements.length === 0) {
            alert("No image found with the specified class.");
            return;
        }
 
        // Create a canvas of the first image (you can modify this for multiple images)
        const canvas = await html2canvas(imageElements[0], {
            useCORS: true,
            allowTaint: true,
            scrollX: 0,
            scrollY: 0,
            windowWidth: imageElements[0].naturalWidth,
            windowHeight: imageElements[0].naturalHeight,
            width: imageElements[0].naturalWidth,
            height: imageElements[0].naturalHeight
        });
 
        return canvas;
    }
 
    function convertCanvasToBlob(canvas) {
        return new Promise((resolve, reject) => {
            canvas.toBlob(blob => {
                blob ? resolve(blob) : reject(new Error('Failed to convert canvas to blob.'));
            }, 'image/png');
        });
    }
 
    async function sendImageToGemini(imageBlob, additionalPrompt = "") {
        if (!await checkApiKey()) return;
 
        const reader = new FileReader();
        reader.readAsDataURL(imageBlob);
 
        return new Promise((resolve, reject) => {
            reader.onloadend = () => {
                const base64Image = reader.result.split(',')[1];
                const promptText = additionalPrompt.trim() !== "" ? additionalPrompt : DEFAULT_PROMPT;
 
                const payload = {
                    contents: [
                        {
                            parts: [
                                { text: promptText },
                                {
                                    inline_data: {
                                        mime_type: "image/png",
                                        data: base64Image
                                    }
                                }
                            ]
                        }
                    ]
                };
 
                GM_xmlhttpRequest({
                    method: "POST",
                    url: GEMINI_API_URL + geminiApiKey,
                    headers: { "Content-Type": "application/json" },
                    data: JSON.stringify(payload),
                    onload: function (response) {
                        if (response.status >= 200 && response.status < 300) {
                            try {
                                const jsonResponse = JSON.parse(response.responseText);
                                const answer = jsonResponse?.candidates?.[0]?.content?.parts?.[0]?.text || "No answer found.";
                                displayAnswerInNewTab(answer);
                            } catch (error) {
                                reject("Error parsing response: " + error.message);
                            }
                        } else {
                            reject(`API Error: ${response.status} - ${response.responseText}`);
                        }
                    },
                    onerror: function (error) {
                        reject("Request error: " + error);
                    }
                });
            };
            reader.onerror = () => reject(new Error('Failed to read image.'));
        });
    }
 
    function displayAnswerInNewTab(answer) {
        const newTabContent = `
            <!DOCTYPE html>
            <html lang="en">
            <head>
                <meta charset="UTF-8">
                <meta name="viewport" content="width=device-width, initial-scale=1.0">
                <title>Gemini Answer</title>
                <link href="https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600&display=swap" rel="stylesheet">
                <style>
                    @keyframes bgAnimation {
                        0% { background-position: 0% 50%; }
                        50% { background-position: 100% 50%; }
                        100% { background-position: 0% 50%; }
                    }
 
                    body {
                        font-family: 'Poppins', sans-serif;
                        background: linear-gradient(135deg, #1E1E2F, #2D2D3F);
                        background-size: 300% 300%;
                        animation: bgAnimation 10s infinite alternate;
                        color: #FFF;
                        text-align: center;
                        display: flex;
                        justify-content: center;
                        align-items: center;
                        height: 100vh;
                        margin: 0;
                    }
                    .container {
                        background: rgba(255, 255, 255, 0.1);
                        padding: 20px;
                        border-radius: 12px;
                        max-width: 600px;
                        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
                        transition: transform 0.3s ease, box-shadow 0.3s ease;
                    }
                    .container:hover {
                        transform: translateY(-5px);
                        box-shadow: 0 10px 20px rgba(255, 255, 255, 0.4);
                    }
                    h1 {
                        font-size: 22px;
                        font-weight: 600;
                        margin-bottom: 10px;
                    }
                    pre {
                        white-space: pre-wrap;
                        word-wrap: break-word;
                        font-size: 14px;
                        background: rgba(255, 255, 255, 0.1);
                        padding: 10px;
                        border-radius: 8px;
                        text-align: left;
                        max-height: 300px;
                        overflow-y: auto;
                        font-family: 'Poppins', sans-serif;
                    }
                    button {
                        margin-top: 10px;
                        padding: 10px 20px;
                        font-size: 14px;
                        border: none;
                        border-radius: 8px;
                        background: #FFC857;
                        color: #222;
                        cursor: pointer;
                        transition: 0.3s;
                    }
                    button:hover {
                        background: #FFA500;
                    }
                </style>
            </head>
            <body>
                <div class="container">
                    <h1>Gemini Answer</h1>
                    <pre id="answer">${answer}</pre>
                    <button onclick="copyToClipboard()">📋 Copy</button>
                </div>
 
                <script>
                    function copyToClipboard() {
                        const answerText = document.getElementById("answer").textContent;
                        navigator.clipboard.writeText(answerText).then(() => {
                            alert("Copied to clipboard!");
                        }).catch(err => console.error("Copy failed:", err));
                    }
                </script>
            </body>
            </html>
        `;
 
        GM_openInTab(`data:text/html;charset=utf-8,${encodeURIComponent(newTabContent)}`, { active: true });
    }
 
    document.addEventListener('keydown', async function (event) {
        if (event.ctrlKey && event.key === 'x') {
            event.preventDefault();
            try {
                const canvas = await captureScreenshot();
                const imageBlob = await convertCanvasToBlob(canvas);
                const additionalPrompt = prompt(ADDITIONAL_PROMPT_MESSAGE);
                await sendImageToGemini(imageBlob, additionalPrompt);
            } catch (error) {
                alert("Error: " + error);
            }
        }
    });
 
    console.log("Mathswatch Autosolver script loaded.");
})();