segment-matcher/dist/cjs/field_mapping.d.ts

Segment Matcher - TypeScript version with dual ESM/CJS format support

import { MessageSegment } from './types';
/**
 * 字段提取函数
 * 从消息段中提取值
 */
export type FieldExtractor = (segment: MessageSegment) => any;
/**
 * 字段映射配置
 * 可以是：
 * 1. 字符串：直接访问该字段
 * 2. 字符串数组：按优先级尝试访问这些字段
 * 3. 函数：自定义提取逻辑
 */
export type FieldMapping = string | string[] | FieldExtractor;
/**
 * 字段映射配置对象
 */
export type FieldMappingConfig = Record<string, FieldMapping>;
/**
 * 提取字段值
 *
 * @param segment - 消息段
 * @param mapping - 字段映射配置
 * @returns 提取的值，如果无法提取则返回 null
 */
export declare function extractFieldValue(segment: MessageSegment, mapping: FieldMapping): any;