@tidyjs/tidy/dist/es/fullJoin.js

Tidy up your data with JavaScript, inspired by dplyr and the tidyverse

import { autodetectByMap, makeByMap, isMatch } from './innerJoin.js';

function fullJoin(itemsToJoin, options) {
  const _fullJoin = (items) => {
    if (!itemsToJoin.length)
      return items;
    if (!items.length)
      return itemsToJoin;
    const byMap = (options == null ? void 0 : options.by) == null ? autodetectByMap(items, itemsToJoin) : makeByMap(options.by);
    const matchMap = new Map();
    const joinObjectKeys = Object.keys(itemsToJoin[0]);
    const joined = items.flatMap((d) => {
      const matches = itemsToJoin.filter((j) => {
        const matched = isMatch(d, j, byMap);
        if (matched) {
          matchMap.set(j, true);
        }
        return matched;
      });
      if (matches.length) {
        return matches.map((j) => ({...d, ...j}));
      }
      const undefinedFill = Object.fromEntries(joinObjectKeys.filter((key) => d[key] == null).map((key) => [key, void 0]));
      return {...d, ...undefinedFill};
    });
    if (matchMap.size < itemsToJoin.length) {
      const leftEmptyObject = Object.fromEntries(Object.keys(items[0]).map((key) => [key, void 0]));
      for (const item of itemsToJoin) {
        if (!matchMap.has(item)) {
          joined.push({...leftEmptyObject, ...item});
        }
      }
    }
    return joined;
  };
  return _fullJoin;
}

export { fullJoin };
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