Issue with image assets not showing up in Sanity Studio CMS or front end after bulk downloading and optimizing dataset.

const fs = require('fs')

const util = require('util')

const ndjson = require('ndjson')

function rebuildFileAssetUrls(val, key) {

if(typeof val === 'string') {

file://${__dirname}/

return newVal

}

else if(Array.isArray(val)) {

return val.map((item)=> rebuildFileAssetUrls(item))

}

else if(typeof val === 'object' && val != null) {

const entries = Object.entries(val)

let newItem = {}

entries.forEach(([key, val])=> newItem[key] = rebuildFileAssetUrls(val, key))

return newItem

}

else if(typeof val === 'undefined' || val == null) {

return val

}

else if(typeof val === 'boolean' || typeof val === 'number') {

return val

}

else {

return val

}

}

(async ()=> {

let data = await new Promise((resolve)=> {

let temp = []

fs.createReadStream('./data.ndjson')

.pipe(ndjson.parse())

.on('data', function(obj) {

temp.push(obj)

})

.on('end', function() {

resolve(temp)

})

})

let writeStream = fs.createWriteStream('./output_0.ndjson')

const serialize = ndjson.stringify()

serialize.on('data', function(line) {

// line is line of stringified JSON with newline delimiter the end

writeStream.write(line, 'utf-8')

})

writeStream.on('finish', () => {

console.log('wrote all data to file')

})

data = data.forEach((item)=> {

let newItem = {

...item

}

newItem = rebuildFileAssetUrls(newItem)

serialize.write(newItem)

})

serialize.end()

})()