@convo-lang/convo-lang/src/lib/convo-eval.js

The language of AI

import { defaultConvoVars } from "./convo-default-vars.js";
export const evalConvoMessageAsCodeAsync = async (msg, flat) => {
    if (!msg.content) {
        return undefined;
    }
    const codeBlockMatch = /^\s*```([^\n]*)(.*)```\s*$/s.exec(msg.content);
    if (!codeBlockMatch) {
        return undefined;
    }
    const lang = codeBlockMatch[1]?.trim().split(' ')[0];
    if (!lang) {
        return undefined;
    }
    const code = codeBlockMatch[2];
    if (!code) {
        return undefined;
    }
    switch (lang.toLowerCase()) {
        case 'js':
        case 'javascript':
            return await evalJsAsync(code, flat);
        default:
            return undefined;
    }
};
const evalJsAsync = async (js, flat) => {
    const argNames = [];
    const args = [];
    const addVar = (name, value) => {
        if (argNames.includes(name)) {
            return;
        }
        argNames.push(name);
        args.push(value);
    };
    addVar('flat', flat);
    addVar('convo', flat.conversation);
    addVar('ctx', flat.exe);
    addVar('setVar', (name, value) => {
        if (typeof name !== 'string') {
            throw new Error('name must be a string');
        }
        return flat.exe.setVar(true, value, name);
    });
    addVar('print', (...args) => flat.exe.print(...args));
    for (const e in flat.exe.sharedVars) {
        if (e in defaultConvoVars) {
            continue;
        }
        addVar(e, flat.exe.sharedVars[e]);
    }
    // disable esbuild eval warning
    const ev = globalThis['eval'];
    const fn = ev(`async (${argNames.join(',')})=>{
        let result=undefined;
        ${js}
        return result;
    }`);
    return await fn(...args);
};
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