huangguo_dhz/src/utils/insertAdv.ts

import { getAdItem } from '@/utils/getConfig';
interface Advparams {
  originArray: Array<any>; // 原数据数组
  insertNum: number; // 每隔insertNum个元素插入一次
  pageSize: number; // 当前页码
  pageNumber: number; // 当前页
  advNum: number; // 当前广告下标
}
export default function insertAdv(obj: Advparams) {
  const { originArray, insertNum, pageSize, pageNumber, advNum } = obj;
  if (!originArray || originArray.length === 0) {
    return [];
  }
  let newArr = originArray;
  const updateArray = [];
  let advIndex = 0;

  for (let i = 0; i < originArray.length; i++) {
    let index = pageSize * (pageNumber - 1) + i;
    // 默认数据
    updateArray.push(originArray[i]);
    // // 每隔insertNum个元素插入一次
    if (getAdItem(advNum) && getAdItem(advNum).length> 0 && (index + 1) % insertNum === 0) {
      // 如果当前位置没有广告，重置0
      if (!getAdItem(advNum)[advIndex]) {
        advIndex = 0;
      }
      const advList = getAdItem(advNum) || [];
      // 当前页广告条数
      const currentPageAdvCout = Math.floor((index + 1) / insertNum);
      const advIdx = (currentPageAdvCout - 1) % advList.length;
      // 插入广告
      // isAdv 字段表示是广告
      updateArray.push(Object.assign({}, getAdItem(advNum)[advIdx], { isAdv: true }));
      advIndex++;
    }
  }
  return updateArray;
}