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'use strict'
const index = require('./lib/entry-index')
const memo = require('./lib/memoization')
const write = require('./lib/content/write')
const Flush = require('minipass-flush')
const { PassThrough } = require('minipass-collect')
const Pipeline = require('minipass-pipeline')
const putOpts = (opts) => ({
algorithms: ['sha512'],
...opts,
})
module.exports = putData
function putData (cache, key, data, opts = {}) {
const { memoize } = opts
opts = putOpts(opts)
return write(cache, data, opts).then((res) => {
return index
.insert(cache, key, res.integrity, { ...opts, size: res.size })
.then((entry) => {
if (memoize)
memo.put(cache, entry, data, opts)
return res.integrity
})
})
}
module.exports.stream = putStream
function putStream (cache, key, opts = {}) {
const { memoize } = opts
opts = putOpts(opts)
let integrity
let size
let memoData
const pipeline = new Pipeline()
// first item in the pipeline is the memoizer, because we need
// that to end first and get the collected data.
if (memoize) {
const memoizer = new PassThrough().on('collect', data => {
memoData = data
})
pipeline.push(memoizer)
}
// contentStream is a write-only, not a passthrough
// no data comes out of it.
const contentStream = write.stream(cache, opts)
.on('integrity', (int) => {
integrity = int
})
.on('size', (s) => {
size = s
})
pipeline.push(contentStream)
// last but not least, we write the index and emit hash and size,
// and memoize if we're doing that
pipeline.push(new Flush({
flush () {
return index
.insert(cache, key, integrity, { ...opts, size })
.then((entry) => {
if (memoize && memoData)
memo.put(cache, entry, memoData, opts)
if (integrity)
pipeline.emit('integrity', integrity)
if (size)
pipeline.emit('size', size)
})
},
}))
return pipeline
}