Get hebrew holidays list from API www.hebcal.com

getHebrewEventList.js

const main = async () => {
  try {
    const resultSet = fetchYearRange(2022, 2052)

    console.log("🚀 ~ file: main.js ~ line 24 ~ merged ~ resultSet", JSON.stringify(resultSet))
    // copy and do stuff.

    console.log("🚀 ~ file: main.js ~ line 7 ~ main ~ resultSet", resultSet)
    // save this to file if you're less lazy then me :)

  } catch (error) {
    console.error("🚀 ~ file: main.js ~ line 11 ~ main ~ error", error)

  }
}

const fetchYearData = async (year) => {
  const apiUrl = `https://www.hebcal.com/hebcal?v=1&cfg=json&maj=on&min=on&year=${year}&month=x&geo=geoname&geonameid=3448439&M=on&s=on&D=on`
  const apiCallRes = await fetch(apiUrl)
  const json = await apiCallRes.json()
  let { items } = json
  items = items.map(item => {
    delete item.leyning
    return item
  })

  return items;
}

const fetchYearRange = async (startYear, endYear) => {
  let eventList = []
  const yearAmount = endYear - startYear

  for (let i = 0; i < yearAmount + 1; i++) {
    const targetYear = startYear + i
    const yearlyEvents = await fetchYearData(targetYear)
    eventList = eventList.concat(yearlyEvents)
  }

  return eventList.reduce((acc, item) => {
    let target = acc.find(entry => entry.date === item.date)
    if (!target) {
      acc.push(item)
      return acc
    }

    const targetIdx = acc.findIndex(entry => entry.date === item.date)
    acc[targetIdx] = { ...target, ...item }
    return acc
  }, [])
}

main()