$(function(){
    // PCRE 正则前端预校验：必须带定界符（权威校验在后端 @preg_match）
    var form = window.UA_CORE.form;
    if (form) {
        form.verify({
            watchRegex: function (value) {
                value = $.trim(value);
                if (value === '') {
                    return '正则不能为空';
                }
                var delim = value.charAt(0);
                if (/[a-zA-Z0-9\s\\]/.test(delim)) {
                    return '必须带 PCRE 定界符，如 ~think\\db\\.*~';
                }
                var body = value.substring(1);
                var closeIdx = -1;
                for (var i = 0; i < body.length; i++) {
                    var c = body.charAt(i);
                    if (c === '\\') {
                        i++;
                        continue;
                    }
                    if (c === delim) {
                        closeIdx = i;
                        break;
                    }
                }
                if (closeIdx === -1) {
                    return '找不到闭合定界符 ' + delim;
                }
                var modifiers = body.substring(closeIdx + 1);
                if (!/^[imsxADSUXJu]*$/.test(modifiers)) {
                    return '非法修饰符：' + modifiers;
                }
            },
        });
    }

    ua.listen();
})