let createPattern = val => new RegExp(`(${val})`, "ig");

// matchHighlighter({
//     searchText: "礼物",
//     items: [
//       {
//         name: "礼物",
//         id: "谁的",
//         kk: "礼sdfsdfjk物"
//       }
//     ]
//   })

export function matchHighlighter({
  searchText,
  items = [],
  pick = [],
  styleRule = "color: red"
}) {
  let pat = createPattern(searchText);
  if (!pick.length) {
    let keyDict = new Set();
    items.forEach(item => {
      Object.keys(item).forEach(k => keyDict.add(k));
    });
    pick = [...keyDict];
  }
  return items.map(item => {
    let search = {};
    pick.forEach(key => {
      if (item[key] && pat.test(item[key])) {
        search[key] = item[key].replace(
          pat,
          `<span style="${styleRule}">$1</span>`
        );
      }
    });
    return {
      ...item,
      _matchHighlighted: search
    };
  });
}