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use std::collections::{HashMap, HashSet};

use serde::{Deserialize, Serialize};

use crate::{
    error::{ApiErrorItem, ApiErrors},
    ty::{ApiModel, ApiTy},
};

// 响应参数
#[derive(Debug, Default, Serialize, Deserialize)]
pub struct ApiResponse {
    // 响应头参数
    pub header: Vec<ApiTy>,

    // 内容类型
    pub content_type: Option<String>,

    // 响应体参数
    pub body: Option<ApiTy>,

    // 错误列表
    pub error: HashSet<ApiErrorItem>,
}

pub trait ApiResultExtractor {
    fn api_response(models: &mut HashMap<String, Option<ApiModel>>) -> ApiResponse;
}

impl<T: ApiResultExtractor, E: ApiErrors> ApiResultExtractor for Result<T, E> {
    fn api_response(models: &mut HashMap<String, Option<ApiModel>>) -> ApiResponse {
        let mut response = T::api_response(models);
        response.error.extend(E::api_errors());
        response
    }
}