zodsei/dist/index.mjs.map

Contract-first type-safe HTTP client with Zod validation

{"version":3,"sources":["../src/validation.ts","../src/errors.ts","../src/utils/path.ts","../src/middleware/index.ts","../src/adapters/axios.ts","../src/schema.ts","../src/client.ts","../src/types.ts","../src/middleware/retry.ts","../src/middleware/cache.ts","../src/utils/request.ts","../src/index.ts"],"sourcesContent":["import { z } from 'zod';\nimport { ValidationError } from './errors';\n\n/**\n * Validation utility functions\n */\n\n// Validate request data\nexport function validateRequest<T>(schema: z.ZodType<T> | undefined, data: unknown): T {\n  if (!schema) {\n    return data as T;\n  }\n  \n  try {\n    return schema.parse(data);\n  } catch (error) {\n    if (error instanceof z.ZodError) {\n      throw ValidationError.fromZodError(error, 'request');\n    }\n    throw error;\n  }\n}\n\n// Validate response data\nexport function validateResponse<T>(schema: z.ZodType<T> | undefined, data: unknown): T {\n  if (!schema) {\n    return data as T;\n  }\n  \n  try {\n    return schema.parse(data);\n  } catch (error) {\n    if (error instanceof z.ZodError) {\n      throw ValidationError.fromZodError(error, 'response');\n    }\n    throw error;\n  }\n}\n\n// Safe parse (no error throwing)\nexport function safeParseRequest<T>(\n  schema: z.ZodType<T> | undefined, \n  data: unknown\n): { success: true; data: T } | { success: false; error: ValidationError } {\n  if (!schema) {\n    return { success: true, data: data as T };\n  }\n  \n  try {\n    const result = schema.parse(data);\n    return { success: true, data: result };\n  } catch (error) {\n    if (error instanceof z.ZodError) {\n      return { success: false, error: ValidationError.fromZodError(error, 'request') };\n    }\n    return { \n      success: false, \n      error: new ValidationError('Unknown validation error', [], 'request') \n    };\n  }\n}\n\n// Safe parse response\nexport function safeParseResponse<T>(\n  schema: z.ZodType<T> | undefined, \n  data: unknown\n): { success: true; data: T } | { success: false; error: ValidationError } {\n  if (!schema) {\n    return { success: true, data: data as T };\n  }\n  \n  try {\n    const result = schema.parse(data);\n    return { success: true, data: result };\n  } catch (error) {\n    if (error instanceof z.ZodError) {\n      return { success: false, error: ValidationError.fromZodError(error, 'response') };\n    }\n    return { \n      success: false, \n      error: new ValidationError('Unknown validation error', [], 'response') \n    };\n  }\n}\n\n// Create optional validator\nexport function createValidator<T>(schema: z.ZodType<T> | undefined, enabled: boolean) {\n  return {\n    validateRequest: enabled \n      ? (data: unknown) => validateRequest(schema, data)\n      : (data: unknown) => data as T,\n    \n    validateResponse: enabled \n      ? (data: unknown) => validateResponse(schema, data)\n      : (data: unknown) => data as T,\n    \n    safeParseRequest: (data: unknown) => safeParseRequest(schema, data),\n    safeParseResponse: (data: unknown) => safeParseResponse(schema, data),\n  };\n}\n","import { z } from 'zod';\n\n// Base error class\nexport class ZodseiError extends Error {\n  constructor(\n    message: string,\n    public readonly code: string\n  ) {\n    super(message);\n    this.name = 'ZodseiError';\n  }\n}\n\n// Validation error\nexport class ValidationError extends ZodseiError {\n  constructor(\n    message: string,\n    public readonly issues: z.core.$ZodIssue[],\n    public readonly type: 'request' | 'response' = 'request'\n  ) {\n    super(message, 'VALIDATION_ERROR');\n    this.name = 'ValidationError';\n  }\n\n  static fromZodError(\n    error: z.ZodError,\n    type: 'request' | 'response' = 'request'\n  ): ValidationError {\n    const message = `${type} validation failed: ${error.issues\n      .map((issue) => `${issue.path.join('.')}: ${issue.message}`)\n      .join(', ')}`;\n\n    return new ValidationError(message, error.issues, type);\n  }\n}\n\n// HTTP error\nexport class HttpError extends ZodseiError {\n  constructor(\n    message: string,\n    public readonly status: number,\n    public readonly statusText: string,\n    public readonly response?: unknown\n  ) {\n    super(message, 'HTTP_ERROR');\n    this.name = 'HttpError';\n  }\n\n  static fromResponse(response: Response, data?: unknown): HttpError {\n    const message = `HTTP ${response.status}: ${response.statusText}`;\n    return new HttpError(message, response.status, response.statusText, data);\n  }\n}\n\n// Network error\nexport class NetworkError extends ZodseiError {\n  constructor(\n    message: string,\n    public readonly originalError: Error\n  ) {\n    super(message, 'NETWORK_ERROR');\n    this.name = 'NetworkError';\n  }\n}\n\n// Configuration error\nexport class ConfigError extends ZodseiError {\n  constructor(message: string) {\n    super(message, 'CONFIG_ERROR');\n    this.name = 'ConfigError';\n  }\n}\n\n// Timeout error\nexport class TimeoutError extends ZodseiError {\n  constructor(timeout: number) {\n    super(`Request timeout after ${timeout}ms`, 'TIMEOUT_ERROR');\n    this.name = 'TimeoutError';\n  }\n}\n","/**\n * Path handling utility functions\n */\n\n// Extract path parameter names\nexport function extractPathParamNames(path: string): string[] {\n  const matches = path.match(/:([^/]+)/g);\n  return matches ? matches.map((match) => match.slice(1)) : [];\n}\n\n// Replace path parameters\nexport function replacePath(path: string, params: Record<string, string>): string {\n  let result = path;\n\n  for (const [key, value] of Object.entries(params)) {\n    result = result.replace(`:${key}`, encodeURIComponent(value));\n  }\n\n  return result;\n}\n\n// Build query string\nexport function buildQueryString(params: Record<string, unknown>): string {\n  const searchParams = new URLSearchParams();\n\n  for (const [key, value] of Object.entries(params)) {\n    if (value !== undefined && value !== null) {\n      if (Array.isArray(value)) {\n        value.forEach((item) => searchParams.append(key, String(item)));\n      } else {\n        searchParams.append(key, String(value));\n      }\n    }\n  }\n\n  const queryString = searchParams.toString();\n  return queryString ? `?${queryString}` : '';\n}\n\n// Build path with optional query string\nexport function buildUrl(path: string, query?: Record<string, unknown>): string {\n  const cleanPath = path.startsWith('/') ? path : `/${path}`;\n  const queryString = query ? buildQueryString(query) : '';\n  return `${cleanPath}${queryString}`;\n}\n\n// Separate path params and query params\nexport function separateParams(\n  path: string,\n  data: Record<string, unknown> | null | undefined\n): { pathParams: Record<string, string>; queryParams: Record<string, unknown> } {\n  const pathParamNames = extractPathParamNames(path);\n  const pathParams: Record<string, string> = {};\n  const queryParams: Record<string, unknown> = {};\n\n  // Handle null/undefined data\n  if (!data) {\n    return { pathParams, queryParams };\n  }\n\n  for (const [key, value] of Object.entries(data)) {\n    if (pathParamNames.includes(key)) {\n      pathParams[key] = String(value);\n    } else {\n      queryParams[key] = value;\n    }\n  }\n\n  return { pathParams, queryParams };\n}\n\n// Check if request body is needed\nexport function shouldHaveBody(method: string): boolean {\n  return !['GET', 'HEAD', 'DELETE'].includes(method.toUpperCase());\n}\n","import type { Middleware, RequestContext, ResponseContext } from '../types';\n\n/**\n * Middleware system\n */\n\n// Middleware executor\nexport class MiddlewareExecutor {\n  constructor(private middleware: Middleware[] = []) {}\n\n  // Execute middleware chain\n  async execute(\n    request: RequestContext,\n    finalHandler: (request: RequestContext) => Promise<ResponseContext>\n  ): Promise<ResponseContext> {\n    if (this.middleware.length === 0) {\n      return finalHandler(request);\n    }\n\n    let index = 0;\n\n    const next = async (req: RequestContext): Promise<ResponseContext> => {\n      if (index >= this.middleware.length) {\n        return finalHandler(req);\n      }\n\n      const middleware = this.middleware[index++];\n      return middleware(req, next);\n    };\n\n    return next(request);\n  }\n\n  // Add middleware\n  use(middleware: Middleware): void {\n    this.middleware.push(middleware);\n  }\n\n  // Get middleware list\n  getMiddleware(): Middleware[] {\n    return [...this.middleware];\n  }\n}\n\n// Create middleware executor\nexport function createMiddlewareExecutor(middleware: Middleware[] = []): MiddlewareExecutor {\n  return new MiddlewareExecutor(middleware);\n}\n\n// Compose multiple middleware\nexport function composeMiddleware(...middleware: Middleware[]): Middleware {\n  return async (request, next) => {\n    const executor = new MiddlewareExecutor(middleware);\n    return executor.execute(request, next);\n  };\n}\n","import type { RequestContext, ResponseContext } from '../types';\nimport { HttpError, NetworkError, TimeoutError } from '../errors';\nimport type { AxiosInstance, AxiosRequestConfig } from 'axios';\nimport { isAxiosError } from 'axios';\n\n/**\n * Axios HTTP adapter\n */\nexport class AxiosAdapter {\n  readonly name = 'axios';\n  private axios: AxiosInstance;\n\n  constructor(axiosInstance: AxiosInstance) {\n    this.axios = axiosInstance;\n  }\n\n  // Interceptors are not supported. Use middleware in the client instead.\n\n  async request(context: RequestContext): Promise<ResponseContext> {\n    try {\n      const axiosConfig = this.createAxiosConfig(context);\n\n      const response = await this.axios.request(axiosConfig);\n\n      const headers: Record<string, string> = (() => {\n        const rh = (response.headers ?? {}) as Record<string, unknown>;\n        if (!rh) return {};\n        try {\n          return Object.fromEntries(\n            Object.entries(rh).map(([k, v]) => [k, typeof v === 'string' ? v : String(v)])\n          );\n        } catch {\n          return {};\n        }\n      })();\n\n      const responseContext: ResponseContext = {\n        status: response.status,\n        statusText: response.statusText,\n        headers,\n        data: response.data,\n      };\n\n      // Check HTTP status\n      if (response.status >= 400) {\n        throw new HttpError(\n          `HTTP ${response.status}: ${response.statusText}`,\n          response.status,\n          response.statusText,\n          response.data\n        );\n      }\n\n      return responseContext;\n    } catch (error: unknown) {\n      if (error instanceof HttpError) {\n        throw error;\n      }\n\n      // Handle Axios errors\n      if (isAxiosError(error)) {\n        if (error.code === 'ECONNABORTED' || error.code === 'ETIMEDOUT') {\n          const to = typeof error.config?.timeout === 'number' ? error.config.timeout : 0;\n          throw new TimeoutError(to || 0);\n        }\n\n        if (error.response) {\n          // Server responded with error status code\n          throw new HttpError(\n            `HTTP ${error.response.status}: ${error.response.statusText}`,\n            error.response.status,\n            error.response.statusText,\n            error.response.data\n          );\n        } else if (error.request) {\n          // Request was made but no response received\n          const message = typeof error.message === 'string' ? error.message : 'Request failed';\n          throw new NetworkError(`Network request failed: ${message}`, error as Error);\n        }\n\n        const message = typeof error.message === 'string' ? error.message : 'Axios error';\n        throw new NetworkError(`Axios request failed: ${message}`, error as Error);\n      }\n\n      const message = error instanceof Error ? error.message : 'Unknown error';\n      throw new NetworkError(\n        `Axios request failed: ${message}`,\n        (error as Error) ?? new Error(String(error))\n      );\n    }\n  }\n\n  private createAxiosConfig(context: RequestContext): AxiosRequestConfig {\n    const config: AxiosRequestConfig = {\n      url: context.url,\n      method: context.method.toLowerCase() as AxiosRequestConfig['method'],\n      headers: {\n        'Content-Type': 'application/json',\n        ...context.headers,\n      },\n    };\n\n    // Add request body\n    if (context.body !== undefined && !['GET', 'HEAD'].includes(context.method.toUpperCase())) {\n      config.data = context.body;\n    }\n\n    // Add query parameters\n    if (context.query && Object.keys(context.query).length > 0) {\n      config.params = context.query as Record<string, unknown>;\n    }\n\n    return config;\n  }\n}\n","import { z } from 'zod';\nimport type { Contract, EndpointDefinition } from './types';\n\n/**\n * Schema inference and extraction utilities\n */\n\n/**\n * Extract request type from endpoint definition\n */\nexport type InferRequestType<T extends EndpointDefinition> = \n  T['request'] extends z.ZodType ? z.infer<T['request']> : void;\n\n/**\n * Extract response type from endpoint definition\n */\nexport type InferResponseType<T extends EndpointDefinition> = \n  T['response'] extends z.ZodType ? z.infer<T['response']> : unknown;\n\n/**\n * Extract all endpoint types from a contract\n */\nexport type InferContractTypes<T extends Contract> = {\n  [K in keyof T]: T[K] extends EndpointDefinition\n    ? {\n        request: InferRequestType<T[K]>;\n        response: InferResponseType<T[K]>;\n        endpoint: T[K];\n      }\n    : T[K] extends Contract\n      ? InferContractTypes<T[K]>\n      : never;\n};\n\n/**\n * Schema extraction utilities\n */\nexport class SchemaExtractor<T extends Contract> {\n  constructor(private contract: T) {}\n\n  /**\n   * Get endpoint definition by path\n   */\n  getEndpoint<K extends keyof T>(path: K): T[K] extends EndpointDefinition ? T[K] : never {\n    const endpoint = this.contract[path];\n    if (this.isEndpointDefinition(endpoint)) {\n      return endpoint as T[K] extends EndpointDefinition ? T[K] : never;\n    }\n    throw new Error(`Endpoint \"${String(path)}\" not found or is not a valid endpoint`);\n  }\n\n  /**\n   * Get nested contract by path\n   */\n  getNested<K extends keyof T>(path: K): T[K] extends Contract ? SchemaExtractor<T[K]> : never {\n    const nested = this.contract[path];\n    if (this.isNestedContract(nested)) {\n      return new SchemaExtractor(nested as T[K] & Contract) as T[K] extends Contract\n        ? SchemaExtractor<T[K]>\n        : never;\n    }\n    throw new Error(`Nested contract \"${String(path)}\" not found or is not a valid contract`);\n  }\n\n  /**\n   * Get request schema for an endpoint\n   */\n  getRequestSchema<K extends keyof T>(\n    path: K\n  ): T[K] extends EndpointDefinition ? T[K]['request'] : never {\n    const endpoint = this.getEndpoint(path);\n    return endpoint.request as T[K] extends EndpointDefinition ? T[K]['request'] : never;\n  }\n\n  /**\n   * Get response schema for an endpoint\n   */\n  getResponseSchema<K extends keyof T>(\n    path: K\n  ): T[K] extends EndpointDefinition ? T[K]['response'] : never {\n    const endpoint = this.getEndpoint(path);\n    return endpoint.response as T[K] extends EndpointDefinition ? T[K]['response'] : never;\n  }\n\n  /**\n   * Get all schemas for an endpoint\n   */\n  getEndpointSchemas<K extends keyof T>(\n    path: K\n  ): T[K] extends EndpointDefinition\n    ? { request: T[K]['request']; response: T[K]['response']; endpoint: T[K] }\n    : never {\n    const endpoint = this.getEndpoint(path);\n    const result = {\n      request: endpoint.request,\n      response: endpoint.response,\n      endpoint: endpoint as T[K] & EndpointDefinition,\n    };\n    return result as T[K] extends EndpointDefinition\n      ? { request: T[K]['request']; response: T[K]['response']; endpoint: T[K] }\n      : never;\n  }\n\n  /**\n   * Get all endpoint paths in the contract\n   */\n  getEndpointPaths(): Array<keyof T> {\n    return Object.keys(this.contract).filter((key) =>\n      this.isEndpointDefinition(this.contract[key])\n    ) as Array<keyof T>;\n  }\n\n  /**\n   * Get all nested contract paths\n   */\n  getNestedPaths(): Array<keyof T> {\n    return Object.keys(this.contract).filter((key) =>\n      this.isNestedContract(this.contract[key])\n    ) as Array<keyof T>;\n  }\n\n  /**\n   * Generate OpenAPI-like schema description\n   */\n  describeEndpoint<K extends keyof T>(\n    path: K\n  ): T[K] extends EndpointDefinition\n    ? {\n        path: string;\n        method: string;\n        requestSchema: z.ZodType | undefined;\n        responseSchema: z.ZodType | undefined;\n        requestType: string;\n        responseType: string;\n      }\n    : never {\n    const endpoint = this.getEndpoint(path);\n\n    const result = {\n      path: endpoint.path,\n      method: endpoint.method,\n      requestSchema: endpoint.request,\n      responseSchema: endpoint.response,\n      requestType: endpoint.request ? this.getSchemaDescription(endpoint.request) : 'void',\n      responseType: endpoint.response ? this.getSchemaDescription(endpoint.response) : 'unknown',\n    };\n\n    return result as T[K] extends EndpointDefinition\n      ? {\n          path: string;\n          method: string;\n          requestSchema: z.ZodType;\n          responseSchema: z.ZodType;\n          requestType: string;\n          responseType: string;\n        }\n      : never;\n  }\n\n  /**\n   * Generate schema description for documentation\n   */\n  private getSchemaDescription(schema: z.ZodType | undefined): string {\n    if (!schema) {\n      return 'undefined';\n    }\n    \n    try {\n      // Try to get a basic description of the schema\n      if (schema instanceof z.ZodObject) {\n        const shape = schema.shape;\n        const fields = Object.keys(shape).map((key) => {\n          const field = shape[key] as z.ZodType;\n          return `${key}: ${this.getZodTypeDescription(field)}`;\n        });\n        return `{ ${fields.join(', ')} }`;\n      }\n      return this.getZodTypeDescription(schema);\n    } catch {\n      return 'unknown';\n    }\n  }\n\n  /**\n   * Get basic Zod type description\n   */\n  private getZodTypeDescription(schema: z.ZodType): string {\n    // Use the _def property to determine the type, which is more reliable\n    const meta = schema as unknown as { def?: { typeName?: string; type?: z.ZodType; innerType?: z.ZodType; value?: unknown }; _def?: { typeName?: string; type?: z.ZodType; innerType?: z.ZodType; value?: unknown } };\n    const def = meta.def ?? meta._def;\n    if (def?.typeName) {\n      switch (def.typeName) {\n        case 'ZodString': return 'string';\n        case 'ZodNumber': return 'number';\n        case 'ZodBoolean': return 'boolean';\n        case 'ZodArray': \n          return def.type ? `${this.getZodTypeDescription(def.type)}[]` : 'array';\n        case 'ZodOptional': \n          return def.innerType ? `${this.getZodTypeDescription(def.innerType)}?` : 'optional';\n        case 'ZodNullable': \n          return def.innerType ? `${this.getZodTypeDescription(def.innerType)} | null` : 'nullable';\n        case 'ZodObject': return 'object';\n        case 'ZodUnion': return 'union';\n        case 'ZodLiteral': return `literal(${JSON.stringify(def.value)})`;\n        case 'ZodEnum': return 'enum';\n        default: return def.typeName.replace('Zod', '').toLowerCase();\n      }\n    }\n    \n    // Fallback to instanceof checks for older versions\n    try {\n      if (schema instanceof z.ZodString) return 'string';\n      if (schema instanceof z.ZodNumber) return 'number';\n      if (schema instanceof z.ZodBoolean) return 'boolean';\n      if (schema instanceof z.ZodArray) {\n        // Safe access to element property\n        const element = (schema as z.ZodArray<z.ZodType>).element;\n        return element ? `${this.getZodTypeDescription(element)}[]` : 'array';\n      }\n      if (schema instanceof z.ZodOptional) {\n        // Safe access to unwrap method\n        const inner = (schema as z.ZodOptional<z.ZodType>).unwrap();\n        return inner ? `${this.getZodTypeDescription(inner)}?` : 'optional';\n      }\n      if (schema instanceof z.ZodNullable) {\n        // Safe access to unwrap method\n        const inner = (schema as z.ZodNullable<z.ZodType>).unwrap();\n        return inner ? `${this.getZodTypeDescription(inner)} | null` : 'nullable';\n      }\n      if (schema instanceof z.ZodObject) return 'object';\n    } catch {\n      // Ignore errors and return unknown\n    }\n    return 'unknown';\n  }\n\n  /**\n   * Check if a value is an endpoint definition\n   */\n  private isEndpointDefinition(value: unknown): value is EndpointDefinition {\n    return (\n      Boolean(value) &&\n      typeof value === 'object' &&\n      value !== null &&\n      'path' in value &&\n      'method' in value\n    );\n  }\n\n  /**\n   * Check if a value is a nested contract\n   */\n  private isNestedContract(value: unknown): value is Contract {\n    return (\n      Boolean(value) &&\n      typeof value === 'object' &&\n      value !== null &&\n      !this.isEndpointDefinition(value)\n    );\n  }\n}\n\n/**\n * Create a schema extractor for a contract\n */\nexport function createSchemaExtractor<T extends Contract>(contract: T): SchemaExtractor<T> {\n  return new SchemaExtractor(contract);\n}\n\n/**\n * Utility type to infer endpoint method signature\n */\nexport type InferEndpointMethod<T extends EndpointDefinition> = (\n  ...args: T['request'] extends z.ZodSchema \n    ? [data: InferRequestType<T>] \n    : []\n) => Promise<InferResponseType<T>>;\n\n/**\n * Utility to extract type information at runtime\n */\nexport function extractTypeInfo<T extends EndpointDefinition>(endpoint: T) {\n  return {\n    requestSchema: endpoint.request,\n    responseSchema: endpoint.response,\n    method: endpoint.method,\n    path: endpoint.path,\n    hasRequestSchema: Boolean(endpoint.request),\n    hasResponseSchema: Boolean(endpoint.response),\n  };\n}\n","import {\n  Contract,\n  EndpointDefinition,\n  ClientConfig,\n  InternalClientConfig,\n  RequestContext,\n  ResponseContext,\n  ApiClient,\n  EndpointMethodWithSchema,\n  InferRequestType,\n  InferResponseType,\n} from './types';\nimport { validateRequest, validateResponse } from './validation';\nimport { separateParams, buildUrl, replacePath, shouldHaveBody } from './utils/path';\nimport { createMiddlewareExecutor, MiddlewareExecutor } from './middleware';\nimport { AxiosAdapter } from './adapters/axios';\nimport { SchemaExtractor, createSchemaExtractor } from './schema';\n\n/**\n * Zodsei client core implementation\n */\nexport class ZodseiClient<T extends Contract> {\n  private readonly contract: T;\n  private readonly config: InternalClientConfig;\n  private readonly middlewareExecutor: MiddlewareExecutor;\n  private adapter: AxiosAdapter | null = null;\n  public readonly $schema: SchemaExtractor<T>;\n\n  constructor(contract: T, config: ClientConfig) {\n    this.contract = contract;\n    this.config = this.normalizeConfig(config);\n    this.middlewareExecutor = createMiddlewareExecutor(this.config.middleware);\n    this.$schema = createSchemaExtractor(contract);\n\n    // Create proxy object for dynamic method calls with nested support\n    return new Proxy(this, {\n      get: (target, prop: string | symbol) => {\n        if (typeof prop === 'string') {\n          // Check if it's a direct endpoint\n          if (prop in this.contract && this.isEndpointDefinition(this.contract[prop])) {\n            return this.createEndpointMethod(prop);\n          }\n\n          // Check if it's a nested contract\n          if (prop in this.contract && this.isNestedContract(this.contract[prop])) {\n            return this.createNestedClient(this.contract[prop] as Contract);\n          }\n        }\n        return Reflect.get(target as object, prop) as unknown;\n      },\n    }) as ZodseiClient<T> & ApiClient<T>;\n  }\n\n  /**\n   * Normalize configuration\n   */\n  private normalizeConfig(config: ClientConfig): InternalClientConfig {\n    return {\n      validateRequest: config.validateRequest ?? true,\n      validateResponse: config.validateResponse ?? true,\n      middleware: config.middleware ?? [],\n      axios: config.axios,\n    };\n  }\n\n  /**\n   * Check if a value is an endpoint definition\n   */\n  private isEndpointDefinition(value: unknown): value is EndpointDefinition {\n    return typeof value === 'object' && value !== null && 'path' in value && 'method' in value;\n  }\n\n  /**\n   * Check if a value is a nested contract\n   */\n  private isNestedContract(value: unknown): value is Contract {\n    return typeof value === 'object' && value !== null && !this.isEndpointDefinition(value);\n  }\n\n  /**\n   * Create nested client for sub-contracts\n   */\n  private createNestedClient(nestedContract: Contract): ApiClient<Contract> {\n    return new Proxy(\n      {},\n      {\n        get: (_target, prop: string | symbol) => {\n          if (typeof prop === 'string') {\n            // Check if it's a direct endpoint in nested contract\n            if (prop in nestedContract && this.isEndpointDefinition(nestedContract[prop])) {\n              return this.createEndpointMethod(\n                `${prop}`,\n                nestedContract[prop] as EndpointDefinition\n              );\n            }\n\n            // Check if it's further nested\n            if (prop in nestedContract && this.isNestedContract(nestedContract[prop])) {\n              return this.createNestedClient(nestedContract[prop] as Contract);\n            }\n          }\n          return undefined as unknown;\n        },\n      }\n    ) as ApiClient<Contract>;\n  }\n\n  /**\n   * Create endpoint method with schema access\n   */\n  private createEndpointMethod(endpointName: string, endpoint?: EndpointDefinition) {\n    const targetEndpoint = endpoint || (this.contract[endpointName] as EndpointDefinition);\n\n    const method = async (...args: unknown[]) => {\n      // 如果有 request schema，取第一个参数；否则传 undefined\n      const data = targetEndpoint.request ? args[0] : undefined;\n      return this.executeEndpoint(targetEndpoint, data) as Promise<\n        InferResponseType<typeof targetEndpoint>\n      >;\n    };\n\n    // Attach schema information to the method\n    (method as EndpointMethodWithSchema<typeof targetEndpoint>).schema = {\n      request: targetEndpoint.request,\n      response: targetEndpoint.response,\n      endpoint: targetEndpoint,\n    };\n\n    // Attach type inference helpers (for development/debugging)\n    (method as EndpointMethodWithSchema<typeof targetEndpoint>).infer = {\n      request: (targetEndpoint.request ? {} : undefined) as InferRequestType<typeof targetEndpoint>,\n      response: (targetEndpoint.response ? {} : {}) as InferResponseType<typeof targetEndpoint>,\n    };\n\n    return method as EndpointMethodWithSchema<typeof targetEndpoint>;\n  }\n\n  /**\n   * Execute endpoint request\n   */\n  private async executeEndpoint(endpoint: EndpointDefinition, data: unknown): Promise<unknown> {\n    // Validate request data\n    const validatedData = this.config.validateRequest\n      ? validateRequest(endpoint.request, data)\n      : data;\n\n    // Build request context\n    const requestContext = this.buildRequestContext(endpoint, validatedData);\n\n    // Execute middleware chain\n    const response = await this.middlewareExecutor.execute(requestContext, (ctx) =>\n      this.executeHttpRequest(ctx)\n    );\n\n    // Validate response data\n    const validatedResponse = this.config.validateResponse\n      ? validateResponse(endpoint.response, response.data)\n      : response.data;\n\n    return validatedResponse;\n  }\n\n  /**\n   * Build request context\n   */\n  private buildRequestContext(endpoint: EndpointDefinition, data: unknown): RequestContext {\n    const { path, method } = endpoint;\n\n    // Separate path params and query params\n    const { pathParams, queryParams } = separateParams(\n      path,\n      typeof data === 'object' && data !== null ? (data as Record<string, unknown>) : undefined\n    );\n\n    // Replace path parameters\n    const finalPath = replacePath(path, pathParams);\n\n    // Build URL (relative path; axios instance is responsible for baseURL)\n    const url =\n      method.toLowerCase() === 'get' ? buildUrl(finalPath, queryParams) : buildUrl(finalPath);\n\n    // Determine request body\n    const body = shouldHaveBody(method)\n      ? method.toLowerCase() === 'get'\n        ? undefined\n        : data\n      : undefined;\n\n    return {\n      url,\n      method,\n      headers: {},\n      body,\n      params: pathParams,\n      query: method.toLowerCase() === 'get' ? (queryParams as Record<string, unknown>) : undefined,\n    };\n  }\n\n  /**\n   * Get adapter\n   */\n  private async getAdapter(): Promise<AxiosAdapter> {\n    if (!this.adapter) {\n      this.adapter = new AxiosAdapter(this.config.axios);\n    }\n    return this.adapter;\n  }\n\n  /**\n   * Execute HTTP request\n   */\n  private async executeHttpRequest(context: RequestContext): Promise<ResponseContext> {\n    const adapter = await this.getAdapter();\n    return adapter.request(context);\n  }\n\n  /**\n   * Get configuration\n   */\n  public getConfig(): Readonly<InternalClientConfig> {\n    return { ...this.config };\n  }\n\n  /**\n   * Get contract\n   */\n  public getContract(): Readonly<T> {\n    return { ...this.contract };\n  }\n\n  /**\n   * Add middleware\n   */\n  public use(\n    middleware: (\n      request: RequestContext,\n      next: (request: RequestContext) => Promise<ResponseContext>\n    ) => Promise<ResponseContext>\n  ): void {\n    this.middlewareExecutor.use(middleware);\n  }\n}\n\n/**\n * Create client with enhanced schema support\n */\nexport function createClient<T extends Contract>(\n  contract: T,\n  config: ClientConfig\n): ZodseiClient<T> & ApiClient<T> {\n  return new ZodseiClient(contract, config) as ZodseiClient<T> & ApiClient<T>;\n}\n","import { z } from 'zod';\nimport type { AxiosInstance } from 'axios';\nimport type { SchemaExtractor } from './schema';\n\n// HTTP method types\nexport type HttpMethod = 'get' | 'post' | 'put' | 'delete' | 'patch' | 'head' | 'options';\n\n// Endpoint definition interface\nexport interface EndpointDefinition {\n  path: string;\n  method: HttpMethod;\n  request?: z.ZodType;\n  response?: z.ZodType;\n}\n\n// Contract type\n/**\n * Contract definition - can be nested\n */\nexport interface Contract {\n  [key: string]: EndpointDefinition | Contract;\n}\n\n/**\n * Helper function to define a contract with proper type inference\n * Preserves literal types while ensuring type safety\n * Supports nested contracts\n */\nexport function defineContract<T extends Contract>(contract: T): T {\n  return contract;\n}\n\n/**\n * Create client type from contract - supports nested access with schema support\n */\nexport type ApiClient<T extends Contract> = {\n  [K in keyof T]: T[K] extends EndpointDefinition\n    ? EndpointMethodWithSchema<T[K]>\n    : T[K] extends Contract\n      ? ApiClient<T[K]>\n      : never;\n} & {\n  $schema: SchemaExtractor<T>;\n};\n\n// Base client configuration\ninterface BaseClientConfig {\n  validateRequest?: boolean;\n  validateResponse?: boolean;\n  middleware?: Middleware[];\n}\n\n// Type-safe client configuration with conditional adapterConfig\nexport type ClientConfig = BaseClientConfig & {\n  // User must provide an Axios instance\n  axios: AxiosInstance;\n};\n\n// Internal configuration type for client implementation\nexport interface InternalClientConfig {\n  validateRequest: boolean;\n  validateResponse: boolean;\n  middleware: Middleware[];\n  axios: AxiosInstance;\n}\n\n// Middleware types\nexport type Middleware = (\n  request: RequestContext,\n  next: (request: RequestContext) => Promise<ResponseContext>\n) => Promise<ResponseContext>;\n\n// Request context\nexport interface RequestContext {\n  url: string;\n  method: HttpMethod;\n  headers: Record<string, string>;\n  body?: unknown;\n  params?: Record<string, string>;\n  query?: Record<string, unknown>;\n}\n\n// Response context\nexport interface ResponseContext {\n  status: number;\n  statusText: string;\n  headers: Record<string, string>;\n  data: unknown;\n}\n\n// Path parameter extraction type\nexport type ExtractPathParams<T extends string> =\n  T extends `${infer _Start}:${infer Param}/${infer Rest}`\n    ? { [K in Param]: string } & ExtractPathParams<`/${Rest}`>\n    : T extends `${infer _Start}:${infer Param}`\n      ? { [K in Param]: string }\n      : object;\n\n// Request data separation type\nexport type SeparateRequestData<T> =\n  T extends Record<string, unknown>\n    ? {\n        pathParams: ExtractPathParams<string>;\n        queryParams: Omit<T, keyof ExtractPathParams<string>>;\n        body: T;\n      }\n    : {\n        pathParams: object;\n        queryParams: object;\n        body: T;\n      };\n\n// Schema inference types\nexport type InferRequestType<T extends EndpointDefinition> = \n  T['request'] extends z.ZodType ? z.infer<T['request']> : void;\n\nexport type InferResponseType<T extends EndpointDefinition> = \n  T['response'] extends z.ZodType ? z.infer<T['response']> : unknown;\n\n// Enhanced endpoint method with schema access\nexport interface EndpointMethodWithSchema<T extends EndpointDefinition> {\n  (\n    ...args: T['request'] extends z.ZodType \n      ? [data: InferRequestType<T>] \n      : []\n  ): Promise<InferResponseType<T>>;\n  schema: {\n    request: T['request'];\n    response: T['response'];\n    endpoint: T;\n  };\n  infer: {\n    request: InferRequestType<T>;\n    response: InferResponseType<T>;\n  };\n}\n\n// Legacy type alias for backward compatibility\nexport type EnhancedApiClient<T extends Contract> = ApiClient<T>;\n","import type { Middleware } from '../types';\nimport { HttpError } from '../errors';\n\n/**\n * Retry middleware configuration\n */\nexport interface RetryConfig {\n  retries: number;\n  delay: number;\n  backoff?: 'linear' | 'exponential';\n  retryCondition?: (error: Error) => boolean;\n  onRetry?: (attempt: number, error: Error) => void;\n}\n\n// Default retry condition\nfunction defaultRetryCondition(error: Error): boolean {\n  if (error instanceof HttpError) {\n    // Retry server errors and some client errors\n    return error.status >= 500 || error.status === 408 || error.status === 429;\n  }\n  // Retry network errors\n  return true;\n}\n\n// Calculate delay time\nfunction calculateDelay(\n  attempt: number,\n  baseDelay: number,\n  backoff: 'linear' | 'exponential'\n): number {\n  switch (backoff) {\n    case 'exponential':\n      return baseDelay * Math.pow(2, attempt);\n    case 'linear':\n    default:\n      return baseDelay * (attempt + 1);\n  }\n}\n\n// Delay function\nfunction delay(ms: number): Promise<void> {\n  return new Promise((resolve) => setTimeout(resolve, ms));\n}\n\n/**\n * Create retry middleware\n */\nexport function retryMiddleware(config: RetryConfig): Middleware {\n  const {\n    retries,\n    delay: baseDelay,\n    backoff = 'exponential',\n    retryCondition = defaultRetryCondition,\n    onRetry,\n  } = config;\n\n  return async (request, next) => {\n    let lastError: Error;\n\n    for (let attempt = 0; attempt <= retries; attempt++) {\n      try {\n        return await next(request);\n      } catch (error) {\n        lastError = error as Error;\n\n        // If it's the last attempt, throw error directly\n        if (attempt === retries) {\n          throw lastError;\n        }\n\n        // Check if should retry\n        if (!retryCondition(lastError)) {\n          throw lastError;\n        }\n\n        // Call retry callback\n        if (onRetry) {\n          onRetry(attempt + 1, lastError);\n        }\n\n        // Calculate delay and wait\n        const delayTime = calculateDelay(attempt, baseDelay, backoff);\n        await delay(delayTime);\n      }\n    }\n\n    throw lastError!;\n  };\n}\n\n/**\n * Create simple retry middleware\n */\nexport function simpleRetry(retries: number, delay: number = 1000): Middleware {\n  return retryMiddleware({\n    retries,\n    delay,\n    backoff: 'exponential',\n  });\n}\n","import type { Middleware, RequestContext, ResponseContext } from '../types';\n\n/**\n * Cache middleware configuration\n */\nexport interface CacheConfig {\n  ttl: number; // Cache time (milliseconds)\n  keyGenerator?: (request: RequestContext) => string;\n  shouldCache?: (request: RequestContext, response: ResponseContext) => boolean;\n  storage?: CacheStorage;\n}\n\n/**\n * Cache storage interface\n */\nexport interface CacheStorage {\n  get(key: string): Promise<CacheEntry | null>;\n  set(key: string, entry: CacheEntry): Promise<void>;\n  delete(key: string): Promise<void>;\n  clear(): Promise<void>;\n}\n\n/**\n * Cache entry\n */\nexport interface CacheEntry {\n  data: ResponseContext;\n  timestamp: number;\n  ttl: number;\n}\n\n/**\n * Memory cache storage implementation\n */\nexport class MemoryCacheStorage implements CacheStorage {\n  private cache = new Map<string, CacheEntry>();\n\n  async get(key: string): Promise<CacheEntry | null> {\n    const entry = this.cache.get(key);\n\n    if (!entry) {\n      return null;\n    }\n\n    // Check if expired\n    if (Date.now() - entry.timestamp > entry.ttl) {\n      this.cache.delete(key);\n      return null;\n    }\n\n    return entry;\n  }\n\n  async set(key: string, entry: CacheEntry): Promise<void> {\n    this.cache.set(key, entry);\n  }\n\n  async delete(key: string): Promise<void> {\n    this.cache.delete(key);\n  }\n\n  async clear(): Promise<void> {\n    this.cache.clear();\n  }\n\n  // Get cache size\n  size(): number {\n    return this.cache.size;\n  }\n\n  // Clean expired cache\n  cleanup(): void {\n    const now = Date.now();\n    for (const [key, entry] of this.cache.entries()) {\n      if (now - entry.timestamp > entry.ttl) {\n        this.cache.delete(key);\n      }\n    }\n  }\n}\n\n// Default cache key generator\nfunction defaultKeyGenerator(request: RequestContext): string {\n  const { url, method, body, query } = request;\n  const parts = [method.toUpperCase(), url];\n\n  if (query && Object.keys(query).length > 0) {\n    parts.push(JSON.stringify(query));\n  }\n\n  if (body) {\n    parts.push(JSON.stringify(body));\n  }\n\n  return parts.join('|');\n}\n\n// Default cache condition\nfunction defaultShouldCache(request: RequestContext, response: ResponseContext): boolean {\n  // Only cache successful GET responses\n  return request.method.toLowerCase() === 'get' && response.status >= 200 && response.status < 300;\n}\n\n/**\n * Create cache middleware\n */\nexport function cacheMiddleware(config: CacheConfig): Middleware {\n  const {\n    ttl,\n    keyGenerator = defaultKeyGenerator,\n    shouldCache = defaultShouldCache,\n    storage = new MemoryCacheStorage(),\n  } = config;\n\n  return async (request, next) => {\n    const cacheKey = keyGenerator(request);\n\n    // Try to get from cache\n    const cachedEntry = await storage.get(cacheKey);\n    if (cachedEntry) {\n      return cachedEntry.data;\n    }\n\n    // Execute request\n    const response = await next(request);\n\n    // Check if should cache\n    if (shouldCache(request, response)) {\n      const entry: CacheEntry = {\n        data: response,\n        timestamp: Date.now(),\n        ttl,\n      };\n\n      await storage.set(cacheKey, entry);\n    }\n\n    return response;\n  };\n}\n\n/**\n * Create simple cache middleware\n */\nexport function simpleCache(ttl: number): Middleware {\n  return cacheMiddleware({ ttl });\n}\n","/**\n * Request handling utility functions\n *\n * Note: This file contains utility functions that were originally designed\n * for general HTTP request handling, but are now handled by individual adapters.\n * These functions are kept for backward compatibility and potential future use.\n */\n\n// Simple header merging utility\nexport function mergeHeaders(\n  defaultHeaders: Record<string, string>,\n  requestHeaders?: Record<string, string>\n): Record<string, string> {\n  return {\n    ...defaultHeaders,\n    ...requestHeaders,\n  };\n}\n","/**\n * Zodsei - Contract-first type-safe HTTP client with Zod validation\n */\n\n// Core exports\nexport { createClient, ZodseiClient } from './client';\nexport { defineContract } from './types';\n\n// Schema exports\nexport {\n  SchemaExtractor,\n  createSchemaExtractor,\n  extractTypeInfo,\n  type InferRequestType,\n  type InferResponseType,\n  type InferContractTypes,\n  type InferEndpointMethod,\n} from './schema';\n\n// Type exports\nexport type {\n  Contract,\n  EndpointDefinition,\n  ClientConfig,\n  ApiClient,\n  EnhancedApiClient,\n  EndpointMethodWithSchema,\n  HttpMethod,\n  RequestContext,\n  ResponseContext,\n  Middleware,\n  ExtractPathParams,\n  SeparateRequestData,\n} from './types';\n\n// Error class exports\nexport {\n  ZodseiError,\n  ValidationError,\n  HttpError,\n  NetworkError,\n  ConfigError,\n  TimeoutError,\n} from './errors';\n\n// Validation utility exports\nexport {\n  validateRequest,\n  validateResponse,\n  safeParseRequest,\n  safeParseResponse,\n  createValidator,\n} from './validation';\n\n// Middleware exports\nexport { createMiddlewareExecutor, composeMiddleware } from './middleware';\nexport { retryMiddleware, simpleRetry } from './middleware/retry';\nexport {\n  cacheMiddleware,\n  simpleCache,\n  MemoryCacheStorage,\n  type CacheConfig,\n  type CacheStorage,\n  type CacheEntry,\n} from './middleware/cache';\n\n// Utility function exports\nexport {\n  extractPathParamNames,\n  replacePath,\n  buildQueryString,\n  buildUrl,\n  separateParams,\n  shouldHaveBody,\n} from './utils/path';\n\nexport { mergeHeaders } from './utils/request';\n\n// Adapter exports\nexport { AxiosAdapter } from './adapters/axios';\n\n// Re-export zod for user convenience\nexport { z } from 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