add toJSON feature

package.json

@@ -44,7 +44,7 @@
     "stable": "^0.1.5"
   },
   "devDependencies": {
-    "aegir": "^3.0.0",
+    "aegir": "^3.0.1",
     "async": "^1.5.2",
     "buffer-loader": "0.0.1",
     "chai": "^3.5.0",
@@ -57,4 +57,4 @@
     "pre-commit": "^1.1.2",
     "rimraf": "^2.5.0"
   }
-}
+}

src/dag-node.js

@@ -1,8 +1,9 @@
 'use strict'
 
-var util = require('./util')
-var protobuf = require('protocol-buffers')
-var stable = require('stable')
+const util = require('./util')
+const protobuf = require('protocol-buffers')
+const stable = require('stable')
+const bs58 = require('bs58')
 
 var schema = 'message PBLink {optional bytes Hash = 1; optional string Name = 2;optional uint64 Tsize = 3;} message PBNode {repeated PBLink Links = 2; optional bytes Data = 1;}'
 
@@ -193,11 +194,28 @@ function DAGNode (data, links) {
 
     return pbn
   }
+
+  this.toJSON = () => {
+    return {
+      Data: this.data,
+      Links: this.links.map((l) => { return l.toJSON() }),
+      Hash: bs58.encode(this.multihash()).toString(),
+      Size: this.size()
+    }
+  }
 }
 
 // Link represents an IPFS Merkle DAG Link between Nodes.
 function DAGLink (name, size, hash) {
   this.name = name
   this.size = size
   this.hash = hash
+
+  this.toJSON = () => {
+    return {
+      Name: this.name,
+      Size: this.size,
+      Hash: bs58.encode(this.hash).toString()
+    }
+  }
 }

test/merkle-dag-tests.js

@@ -140,6 +140,42 @@ module.exports = function (repo) {
         done()
       })
     })
+
+    it('dagNode.toJSON with empty Node', (done) => {
+      const node = new DAGNode(new Buffer(0))
+      const nodeJSON = node.toJSON()
+      expect(nodeJSON.Data).to.deep.equal(new Buffer(0))
+      expect(nodeJSON.Links).to.deep.equal([])
+      expect(nodeJSON.Hash).to.exist
+      expect(nodeJSON.Size).to.exist
+      done()
+    })
+
+    it('dagNode.toJSON with data no links', (done) => {
+      const node = new DAGNode(new Buffer('La cucaracha'))
+      const nodeJSON = node.toJSON()
+      expect(nodeJSON.Data).to.deep.equal(new Buffer('La cucaracha'))
+      expect(nodeJSON.Links).to.deep.equal([])
+      expect(nodeJSON.Hash).to.exist
+      expect(nodeJSON.Size).to.exist
+      done()
+    })
+
+    it('dagNode.toJSON with data and links', (done) => {
+      var node1 = new DAGNode(new Buffer('hello'))
+      var node2 = new DAGNode(new Buffer('world'))
+      node1.addNodeLink('continuation', node2)
+      const node1JSON = node1.toJSON()
+      expect(node1JSON.Data).to.deep.equal(new Buffer('hello'))
+      expect(node1JSON.Links).to.deep.equal([{
+        Hash: 'QmPfjpVaf593UQJ9a5ECvdh2x17XuJYG5Yanv5UFnH3jPE',
+        Name: 'continuation',
+        Size: 7
+      }])
+      expect(node1JSON.Hash).to.exist
+      expect(node1JSON.Size).to.exist
+      done()
+    })
   })
 
   describe('dag-service', function () {