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feat: Update API, use new block-service, block and ipld-dag-pb
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| 'use strict' | ||
|
|
||
| // const isIPFS = require('is-ipfs') | ||
| const Block = require('ipfs-block') | ||
| // const ipld = require('ipld-dag-cbor') | ||
| const pull = require('pull-stream') | ||
| const traverse = require('pull-traverse') | ||
| // const mh = require('multihashes') | ||
| const dagPB = require('ipld-dag-pb') | ||
|
|
||
| const utils = require('./utils') | ||
|
|
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| module.exports = class IPLDResolver { | ||
| constructor (blockService) { | ||
| // TODO instead of throwing, just create an in-memory | ||
| // block-service, so it is nice for demos | ||
| if (!blockService) { | ||
| throw new Error('IPLDService requires a BlockService instance') | ||
| } | ||
|
|
||
| this.bs = blockService | ||
| this.resolvers = {} | ||
| this.support(dagPB.resolver.multicodec, dagPB.resolver) | ||
| } | ||
|
|
||
| // Adds support for an IPLD format | ||
| // default ones are dag-pb and dag-cbor | ||
| support (multicodec, resolver) { | ||
| this.resolvers[multicodec] = resolver | ||
| } | ||
|
|
||
| resolve (cid, path) { | ||
| // TODO | ||
| } | ||
|
|
||
| put (node, callback) { | ||
| callback = callback || noop | ||
| pull( | ||
| pull.values([node]), | ||
| this.putStream(callback) | ||
| ) | ||
| } | ||
|
|
||
| putStream (callback) { | ||
| callback = callback || noop | ||
|
|
||
| return pull( | ||
| pull.map((node) => { | ||
| return { | ||
| block: new Block(node.serialize()), | ||
| cid: node.cid() | ||
| } | ||
| }), | ||
| this.bs.putStream(), | ||
| pull.onEnd(callback) | ||
| ) | ||
| } | ||
|
|
||
| get (cid, callback) { | ||
| pull( | ||
| this.getStream(cid), | ||
| pull.collect((err, res) => { | ||
| if (err) { | ||
| return callback(err) | ||
| } | ||
| callback(null, res[0]) | ||
| }) | ||
| ) | ||
| } | ||
|
|
||
| getStream (cid) { | ||
| return pull( | ||
| this.bs.getStream(cid), | ||
| pull.map((block) => { | ||
| // TODO | ||
| // deserialize this block into the format described by the CID | ||
| // if the multicodec is not known (i.e we don't have a deserializer) | ||
| // send back the raw data | ||
|
|
||
| // old -> ipld.unmarshal(block.data) | ||
| }) | ||
| ) | ||
| } | ||
|
|
||
| getRecursive (cid, callback) { | ||
| pull( | ||
| this.getRecursiveStream(cid), | ||
| pull.collect(callback) | ||
| ) | ||
| } | ||
|
|
||
| getRecursiveStream (cid) { | ||
| return pull( | ||
| this.getStream(cid), | ||
| pull.map((node) => { | ||
| traverse.widthFirst(node, (node) => { | ||
| return pull( | ||
| pull.values(utils.getKeys(node)), | ||
| pull.map((link) => this.getStream(link)), | ||
| pull.flatten() | ||
| ) | ||
| }) | ||
| }), | ||
| pull.flatten() | ||
| ) | ||
| } | ||
|
|
||
| remove (cids, callback) { | ||
| this.bs.delete(cids, callback) | ||
| } | ||
| } | ||
|
|
||
| function noop () {} | ||
|
|
||
| /* | ||
| function normalizeKey (key) { | ||
| let res | ||
| const isMhash = isIPFS.multihash(key) | ||
| const isPath = isIPFS.path(key) | ||
| if (!isMhash && !isPath) { | ||
| return null | ||
| } | ||
| if (isMhash) { | ||
| res = key | ||
| } else if (isPath) { | ||
| res = key.replace('/ipfs/', '') | ||
| } | ||
| if (typeof res === 'string') { | ||
| return mh.fromB58String(res) | ||
| } | ||
| return res | ||
| } | ||
| */ |
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