@sema-agent/core/dist/core/permission-rule-syntax.js

Stateless, task-oriented AI agent core

export function indexOfUnescaped(s, ch) {
    for (let i = 0; i < s.length; i++) {
        if (s[i] !== ch)
            continue;
        let backslashes = 0;
        for (let j = i - 1; j >= 0 && s[j] === "\\"; j--)
            backslashes++;
        if (backslashes % 2 === 0)
            return i;
    }
    return -1;
}
export function lastIndexOfUnescaped(s, ch) {
    for (let i = s.length - 1; i >= 0; i--) {
        if (s[i] !== ch)
            continue;
        let backslashes = 0;
        for (let j = i - 1; j >= 0 && s[j] === "\\"; j--)
            backslashes++;
        if (backslashes % 2 === 0)
            return i;
    }
    return -1;
}
function unescapeRuleContent(s) {
    return s.replaceAll("\\(", "(").replaceAll("\\)", ")").replaceAll("\\\\", "\\");
}
export function parsePermissionRule(rule) {
    const open = indexOfUnescaped(rule, "(");
    if (open === -1)
        return { toolName: rule.trim() };
    const close = lastIndexOfUnescaped(rule, ")");
    if (close === -1 || close <= open)
        return { toolName: rule.trim() };
    if (close !== rule.length - 1)
        return { toolName: rule.trim() };
    const name = rule.substring(0, open);
    const content = rule.substring(open + 1, close);
    if (!name)
        return { toolName: rule.trim() };
    if (content === "" || content === "*")
        return { toolName: name.trim() };
    return { toolName: name.trim(), ruleContent: unescapeRuleContent(content) };
}