react-native-full-calendars/lib/module/calendar/utils/computed-calendar-data.js

React Native Full Calendar (RNFC) is an intuitive and powerful calendar component library designed for React Native.

"use strict";

import { differenceInDays, format, subDays } from 'date-fns';
import { alignDataList } from './computed-array-merge';
import { getIterableDateBetweenDates } from './date';
export const computedCalendarData = dataList => {
  const dataListWithMetadata = dataList.map(data => {
    return computedRangeDates(data);
  });
  const dataMap = {};
  for (const event of dataListWithMetadata) {
    for (const date of event.metadata.datesInRange) {
      const eventCopy = {
        ...event,
        isStart: false,
        isEnd: false
      };
      dataMap[date] = dataMap[date] ? [...dataMap[date], eventCopy] : [eventCopy];
    }
  }
  Object.keys(dataMap).sort((a, b) => differenceInDays(a, b)).forEach(eventDate => {
    const prevDate = format(subDays(eventDate, 1), 'yyyy-MM-dd');
    const prevEventList = updateStartEndFlags(dataMap[prevDate] || [], prevDate);
    const currentEventList = updateStartEndFlags(dataMap[eventDate] || [], eventDate);

    // data merge
    dataMap[eventDate] = alignDataList(prevEventList, currentEventList);
  });
  return dataMap;
};
const updateStartEndFlags = (dataListWithMetadata, referenceDate) => {
  return dataListWithMetadata.map(dataWithMetadata => {
    if (!dataWithMetadata) {
      return null;
    }
    const dateIndex = dataWithMetadata.metadata.datesInRange?.findIndex(date => date === referenceDate);
    return {
      ...dataWithMetadata,
      metadata: {
        ...dataWithMetadata.metadata,
        isStart: dateIndex === 0,
        isEnd: dateIndex + 1 === dataWithMetadata.metadata.datesInRange?.length
      }
    };
  });
};
const computedRangeDates = data => {
  const startDate = data.startAt;
  const endDate = data.endAt;
  const datesInRange = getIterableDateBetweenDates(startDate, endDate);
  return {
    ...data,
    metadata: {
      datesInRange,
      isEnd: false,
      isStart: false
    }
  };
};
//# sourceMappingURL=computed-calendar-data.js.map