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'use strict' const Collect = require('minipass-collect') const Minipass = require('minipass') const Pipeline = require('minipass-pipeline') const index = require('./entry-index') const memo = require('./memoization') const read = require('./content/read') async function getData (cache, key, opts = {}) { const { integrity, memoize, size } = opts const memoized = memo.get(cache, key, opts) if (memoized && memoize !== false) { return { metadata: memoized.entry.metadata, data: memoized.data, integrity: memoized.entry.integrity, size: memoized.entry.size, } } const entry = await index.find(cache, key, opts) if (!entry) { throw new index.NotFoundError(cache, key) } const data = await read(cache, entry.integrity, { integrity, size }) if (memoize) { memo.put(cache, entry, data, opts) } return { data, metadata: entry.metadata, size: entry.size, integrity: entry.integrity, } } module.exports = getData async function getDataByDigest (cache, key, opts = {}) { const { integrity, memoize, size } = opts const memoized = memo.get.byDigest(cache, key, opts) if (memoized && memoize !== false) { return memoized } const res = await read(cache, key, { integrity, size }) if (memoize) { memo.put.byDigest(cache, key, res, opts) } return res } module.exports.byDigest = getDataByDigest function getDataSync (cache, key, opts = {}) { const { integrity, memoize, size } = opts const memoized = memo.get(cache, key, opts) if (memoized && memoize !== false) { return { metadata: memoized.entry.metadata, data: memoized.data, integrity: memoized.entry.integrity, size: memoized.entry.size, } } const entry = index.find.sync(cache, key, opts) if (!entry) { throw new index.NotFoundError(cache, key) } const data = read.sync(cache, entry.integrity, { integrity: integrity, size: size, }) const res = { metadata: entry.metadata, data: data, size: entry.size, integrity: entry.integrity, } if (memoize) { memo.put(cache, entry, res.data, opts) } return res } module.exports.sync = getDataSync function getDataByDigestSync (cache, digest, opts = {}) { const { integrity, memoize, size } = opts const memoized = memo.get.byDigest(cache, digest, opts) if (memoized && memoize !== false) { return memoized } const res = read.sync(cache, digest, { integrity: integrity, size: size, }) if (memoize) { memo.put.byDigest(cache, digest, res, opts) } return res } module.exports.sync.byDigest = getDataByDigestSync const getMemoizedStream = (memoized) => { const stream = new Minipass() stream.on('newListener', function (ev, cb) { ev === 'metadata' && cb(memoized.entry.metadata) ev === 'integrity' && cb(memoized.entry.integrity) ev === 'size' && cb(memoized.entry.size) }) stream.end(memoized.data) return stream } function getStream (cache, key, opts = {}) { const { memoize, size } = opts const memoized = memo.get(cache, key, opts) if (memoized && memoize !== false) { return getMemoizedStream(memoized) } const stream = new Pipeline() // Set all this up to run on the stream and then just return the stream Promise.resolve().then(async () => { const entry = await index.find(cache, key) if (!entry) { throw new index.NotFoundError(cache, key) } stream.emit('metadata', entry.metadata) stream.emit('integrity', entry.integrity) stream.emit('size', entry.size) stream.on('newListener', function (ev, cb) { ev === 'metadata' && cb(entry.metadata) ev === 'integrity' && cb(entry.integrity) ev === 'size' && cb(entry.size) }) const src = read.readStream( cache, entry.integrity, { ...opts, size: typeof size !== 'number' ? entry.size : size } ) if (memoize) { const memoStream = new Collect.PassThrough() memoStream.on('collect', data => memo.put(cache, entry, data, opts)) stream.unshift(memoStream) } stream.unshift(src) return stream }).catch((err) => stream.emit('error', err)) return stream } module.exports.stream = getStream function getStreamDigest (cache, integrity, opts = {}) { const { memoize } = opts const memoized = memo.get.byDigest(cache, integrity, opts) if (memoized && memoize !== false) { const stream = new Minipass() stream.end(memoized) return stream } else { const stream = read.readStream(cache, integrity, opts) if (!memoize) { return stream } const memoStream = new Collect.PassThrough() memoStream.on('collect', data => memo.put.byDigest( cache, integrity, data, opts )) return new Pipeline(stream, memoStream) } } module.exports.stream.byDigest = getStreamDigest function info (cache, key, opts = {}) { const { memoize } = opts const memoized = memo.get(cache, key, opts) if (memoized && memoize !== false) { return Promise.resolve(memoized.entry) } else { return index.find(cache, key) } } module.exports.info = info async function copy (cache, key, dest, opts = {}) { const entry = await index.find(cache, key, opts) if (!entry) { throw new index.NotFoundError(cache, key) } await read.copy(cache, entry.integrity, dest, opts) return { metadata: entry.metadata, size: entry.size, integrity: entry.integrity, } } module.exports.copy = copy async function copyByDigest (cache, key, dest, opts = {}) { await read.copy(cache, key, dest, opts) return key } module.exports.copy.byDigest = copyByDigest module.exports.hasContent = read.hasContent
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