[WIP] add missing dag.tree()

src/dag/index.js

@@ -7,6 +7,7 @@ module.exports = (arg) => {
 
   return {
     get: require('./get')(send),
-    put: require('./put')(send)
+    put: require('./put')(send),
+    tree: require('./tree')(send)
   }
 }

src/dag/tree.js

@@ -0,0 +1,37 @@
+'use strict'
+const promisify = require('promisify-es6')
+const block = require('../block')
+
+const DAGFormats = {
+  'dag-cbor': require('ipld-dag-cbor'),
+  'dag-pb': require('ipld-dag-pb')
+}
+
+module.exports = (send) => {
+  return promisify((cid, path, options, callback) => {
+    if (typeof path === 'function') {
+      callback = path
+      path = undefined
+    }
+
+    if (typeof options === 'function') {
+      callback = options
+      options = {}
+    }
+
+    options = options || {}
+    path = path || ''
+
+    // FIXME: handle case when options.recursive is true
+    block(send).get(cid, options, (err, ipfsBlock) => {
+      if (err) return callback(err)
+
+      const codec = ipfsBlock.cid.codec
+      if (codec in DAGFormats) {
+        DAGFormats[codec].resolver.tree(ipfsBlock.data, callback)
+      } else {
+        callback(new Error(`codec ${codec} is not valid`), null)
+      }
+    })
+  })
+}

test/dag.spec.js

@@ -0,0 +1,77 @@
+/* eslint-env mocha */
+'use strict'
+
+const chai = require('chai')
+const dirtyChai = require('dirty-chai')
+const expect = chai.expect
+chai.use(dirtyChai)
+
+const IPFSApi = require('../src')
+const f = require('./utils/factory')
+
+describe('.dag', function () {
+  this.timeout(50 * 1000) // slow CI
+
+  let ipfs
+  let ipfsd
+
+  const obj = {
+    a: 1,
+    b: [1, 2, 3],
+    c: {
+      ca: [5, 6, 7],
+      cb: 'foo'
+    }
+  }
+
+  before((done) => {
+    f.spawn({ initOptions: { bits: 1024 } }, (err, _ipfsd) => {
+      expect(err).to.not.exist()
+      ipfsd = _ipfsd
+      ipfs = IPFSApi(_ipfsd.apiAddr)
+      done()
+    })
+  })
+
+  after((done) => {
+    if (!ipfsd) return done()
+    ipfsd.stop(done)
+  })
+
+  it('.dag.tree', (done) => {
+    const expectedPaths = [
+      'a', 'b', 'b/0', 'b/1', 'b/2', 'c', 'c/ca',
+      'c/ca/0', 'c/ca/1', 'c/ca/2', 'c/cb'
+    ]
+
+    ipfs.dag.put(obj, (err, cid) => {
+      expect(err).to.not.exist()
+      ipfs.dag.tree(cid, {}, (err, paths) => {
+        expect(err).to.not.exist()
+        expect(paths).deep.equal(expectedPaths)
+        done()
+      })
+    })
+  })
+
+  it('.dag.put', (done) => {
+    let expectedCidStr = 'zdpuArMWc9Ee3B7zUDucRjvA1bDgYpWt8rpUXXjY3tbmBw619'
+    ipfs.dag.put(obj, (err, cid) => {
+      expect(err).to.not.exist()
+      let cidStr = cid.toBaseEncodedString()
+      expect(cidStr).to.be.equal(expectedCidStr)
+      done()
+    })
+  })
+
+  it('.dag.get', (done) => {
+    ipfs.dag.put(obj, (err, cid) => {
+      expect(err).to.not.exist()
+      ipfs.dag.get(cid, (err, data) => {
+        expect(err).to.not.exist()
+        expect(data.value).deep.equal(obj)
+        done()
+      })
+    })
+  })
+})