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#!/usr/bin/env node

import assert from 'assert'

import { isArray, isString } from 'lodash-es'

function countArrayValues(arr) {

const counter = new Map()

arr.forEach((value) => counter.set(value, (counter.get(value) || 0) + 1))

return [...counter.entries()].map(([value, count]) => {

return { value, count }

})

}

export default function validateRecords(name, records) {

assert(isString(name) && name.length, '`name` is required')

assert(isArray(records) && records.length, '`records` must be a non-empty array')

// each ID is unique

const objectIDs = records.map((record) => record.objectID)

const dupes = countArrayValues(objectIDs)

.filter(({ count }) => count > 1)

.map(({ value }) => value)

assert(!dupes.length, `every objectID must be unique. dupes: ${dupes.join('; ')}`)

records.forEach((record) => {

assert(

isString(record.objectID) && record.objectID.length,

`objectID must be a string. received: ${record.objectID}, ${JSON.stringify(record)}`

)

assert(

isString(record.title) && record.title.length,

`title must be a string. received: ${record.title}, ${JSON.stringify(record)}`

)

})

return true

}