ChatChain

works like langchain but with ChatGPT(WIP), only support Translate input to English on ChatChain with Google Translate now
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// ==UserScript==
// @name         ChatChain
// @namespace    ChatChain
// @version      1.0
// @description  works like langchain but with ChatGPT(WIP), only support Translate input to English on ChatChain with Google Translate now
// @author       [email protected]
// @match        https://chat.openai.com/*
// @grant        GM_xmlhttpRequest
// @run-at       document-idle
// @license      MIT
// ==/UserScript==

(function () {
    'use strict';
    let monitorReply2TranslateBack = false, monitorReply2quest = false;
    let translateMode = true;
    let form, submitButton, inputField, submitButtonClone, inputFieldClone;
    interceptSubmitBtn();

    const observer = new MutationObserver(mutations => {
        mutations.forEach(mutation => {
            if (mutation.type === 'childList') {
                console.log(mutation.addedNodes)
                mutation.addedNodes.forEach(addedNode => {
                    if (addedNode.nodeType === Node.ELEMENT_NODE && ((addedNode.classList.contains('overflow-hidden') && addedNode.classList.contains('w-full') && addedNode.classList.contains('h-full') && addedNode.classList.contains('relative')))) {
                        interceptSubmitBtn();
                    }
                    if (addedNode.nodeType === Node.ELEMENT_NODE && (addedNode.classList.contains('px-2') &&
                        addedNode.classList.contains('py-10') &&
                        addedNode.classList.contains('relative') &&
                        addedNode.classList.contains('w-full') &&
                        addedNode.classList.contains('flex') &&
                        addedNode.classList.contains('flex-col') &&
                        addedNode.classList.contains('h-full'))) {

                        interceptSubmitBtn();

                    }

                });

                mutation.removedNodes.forEach(removedNode => {
                    if (removedNode.nodeType === Node.ELEMENT_NODE && removedNode.classList.contains('btn') && removedNode.classList.contains('flex') && removedNode.classList.contains('justify-center') && removedNode.classList.contains('gap-2') && removedNode.classList.contains('btn-neutral') && removedNode.classList.contains('border-0') && removedNode.classList.contains('md:border') && removedNode.textContent.includes('Stop generating')) {
                        const proseElements = document.querySelectorAll('.prose');
                        const lastProseElement = proseElements[proseElements.length - 1];
                        const form = document.querySelector('form.stretch');
                        const submitButton = form.querySelector('div div:nth-child(2) > button');
                        const inputField = form.querySelector('div:nth-child(2) textarea');
                        if (monitorReply2quest) {
                            quest(lastProseElement.textContent);

                        } else if (monitorReply2TranslateBack) {
                            translateBack(lastProseElement.textContent);
                        }
                    }
                })
            }
        });
    });

    observer.observe(document.body, { childList: true, subtree: true });
    // 定义翻译函数，用于翻译给定的文本
    const translateText = async (text) => {
        const url = 'https://translate.googleapis.com/translate_a/single?client=gtx&sl=zh-CN&tl=en&dt=t&q=' + encodeURI(text);
        const response = await fetch(url);
        const data = await response.json();
        return data[0][0][0];
    };

    function interceptSubmitBtn() {

        form = document.querySelector('form.stretch');
        submitButton = form.querySelector('div div:nth-child(2) > button');
        inputField = form.querySelector('div:nth-child(2) textarea');
        // 拦截表单提交事件，翻译输入内容并替换输入框中的内容
        if (!submitButton || !inputField) {
            return;
        }

        submitButton.addEventListener('click', handleSubmit, { useCapture: true });

        inputField.addEventListener("keydown", handleEnterDown, { useCapture: true });
        inputField.addEventListener("keyup", async function (event) {
            if (event.key === "Enter") {
                event.preventDefault();
                event.stopImmediatePropagation();
            }
        });
        inputField.addEventListener("keypress", async function (event) {
            if (event.key === "Enter") {
                event.preventDefault();
                event.stopImmediatePropagation();
            }
        });


    }
    async function handleEnterDown(event) {
        if (event.key === "Enter") {
            handleSubmit(event);
        }
    }
    async function handleSubmit(event) {
        const stage = submitButton.getAttribute('data-stage')
        const texts = inputField.value.split('|');

        if ((stage && stage != 0) || !translateMode) {
            return;
        } else if (texts.length > 1 && ['默认模式', 'default', 'd'].includes(texts[0])) {
            inputField.value = texts[1];
            return;
        } else if (texts.length > 1 && ['切换模式', 'toggle', 't'].includes(texts[0])) {
            translateMode = !translateMode;
            inputField.value = texts[1];
            return;
        }
        event.preventDefault();
        event.stopImmediatePropagation();
        if (!+stage) {
            if (!monitorReply2quest && !monitorReply2TranslateBack) {
                translate();
            }
        }

    }

    async function translate() {
        submitButton.setAttribute('data-stage', 'translating');

        const inputText = inputField.value.trim();
        if (inputText.length === 0) {
            return;
        }
        inputField.value = "翻译中ing";
        const translatedText = await translateText(inputText);
        inputField.value = translatedText;

        submitButton.click();

        monitorReply2TranslateBack = true;
    }

    function quest(reply) {
        submitButton.setAttribute('data-stage', 'questing');

        if (reply.length === 0) {
            return;
        }

        inputField.value = 'answer using English, as specific as possible： "' + reply + '"';

        submitButton.click();
        monitorReply2quest = false;
        monitorReply2TranslateBack = true;
    }
    function translateBack(reply) {
        submitButton.setAttribute('data-stage', 'translateBacking');
        inputField.value = '翻译成中文，只返回中文： "' + reply + '"';
        submitButton.click();
        monitorReply2TranslateBack = false;
        submitButton.setAttribute('data-stage', 0);
    }

})();