Simple Grammar Fix

Ctrl+& fixes grammar using Github API

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         Simple Grammar Fix
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Ctrl+& fixes grammar using Github API
// @match        *://*/*
// @license      WTFPL
// @icon         https://www.iconsdb.com/icons/preview/royal-blue/edit-12-xxl.png
// @author       moony
// @grant        GM_xmlhttpRequest
// @grant        GM_registerMenuCommand
// @grant        GM_setValue
// @grant        GM_getValue
// @connect      models.github.ai
// ==/UserScript==

(function() {
    const MODEL = "openai/gpt-4.1"; // gpt-4o, o4-mini, gpt-4.1, Mistral-Large-2411 from https://github.com/marketplace?type=models
    const SYSTEM_PROMPT = "Fix grammar only. Return compact corrected text.";

    GM_registerMenuCommand("🗝️ Set API Key", () =>
        GM_setValue("GITHUB_TOKEN", prompt("Enter your GitHub API key:") || GM_getValue("GITHUB_TOKEN"))
    );

    document.addEventListener('keydown', e => {
        if (!(e.ctrlKey && e.key === '&')) return;
        e.preventDefault();

        const token = GM_getValue("GITHUB_TOKEN");
        if (!token) return alert("API key not set. Use Tampermonkey menu → 🗝️ Set API Key");

        const sel = window.getSelection();
        const txt = sel.toString().trim();
        if (!txt) return;

        const el = document.activeElement;
        const isInput = el.tagName === 'TEXTAREA' || el.tagName === 'INPUT';

        GM_xmlhttpRequest({
            method: "POST",
            url: "https://models.github.ai/inference/chat/completions",
            headers: {"Content-Type": "application/json", "Authorization": `Bearer ${token}`},
            data: JSON.stringify({
                messages: [{role: "system", content: SYSTEM_PROMPT}, {role: "user", content: txt}],
                model: MODEL, temperature: 0.7
            }),
            onload: r => {
                if (r.status !== 200) return console.error("Error:", r.responseText);

                const fixed = JSON.parse(r.responseText).choices[0].message.content;

                if (isInput) {
                    const [start, end] = [el.selectionStart, el.selectionEnd];
                    el.value = el.value.substring(0, start) + fixed + el.value.substring(end);
                    el.selectionStart = start;
                    el.selectionEnd = start + fixed.length;
                } else if (sel.rangeCount) {
                    const rng = sel.getRangeAt(0);
                    rng.deleteContents();
                    rng.insertNode(document.createTextNode(fixed));
                }
            },
            onerror: e => console.error("Request failed:", e)
        });
    });
})();