feat: ipns over pubsub (#846)

Author: vasco-santos

Diff for: README.md

@@ -277,6 +277,9 @@ const ipfs = IpfsApi({
 
 - [name](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/NAME.md)
   - [`ipfs.name.publish(addr, [options], [callback])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/NAME.md#namepublish)
+  - [`ipfs.name.pubsub.cancel(arg, [callback])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/NAME.md#namepubsubcancel)
+  - [`ipfs.name.pubsub.state([callback])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/NAME.md#namepubsubstate)
+  - [`ipfs.name.pubsub.subs([callback])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/NAME.md#namepubsubsubs)
   - [`ipfs.name.resolve(addr, [options], [callback])`](https://github.com/ipfs/interface-ipfs-core/blob/master/SPEC/NAME.md#nameresolve)
 
 #### Node Management

Diff for: package.json

@@ -82,7 +82,7 @@
     "eslint-plugin-react": "^7.10.0",
     "go-ipfs-dep": "~0.4.17",
     "gulp": "^3.9.1",
-    "interface-ipfs-core": "~0.78.0",
+    "interface-ipfs-core": "~0.80.0",
     "ipfsd-ctl": "~0.39.0",
     "pull-stream": "^3.6.8",
     "socket.io": "^2.1.1",

Diff for: src/name/index.js

@@ -7,6 +7,7 @@ module.exports = (arg) => {
 
   return {
     publish: require('./publish')(send),
-    resolve: require('./resolve')(send)
+    resolve: require('./resolve')(send),
+    pubsub: require('./pubsub')(send)
   }
 }

Diff for: src/name/pubsub/cancel.js

@@ -0,0 +1,24 @@
+'use strict'
+
+const promisify = require('promisify-es6')
+
+const transform = function (res, callback) {
+  callback(null, {
+    canceled: res.Canceled === undefined || res.Canceled === true
+  })
+}
+
+module.exports = (send) => {
+  return promisify((args, opts, callback) => {
+    if (typeof (opts) === 'function') {
+      callback = opts
+      opts = {}
+    }
+
+    send.andTransform({
+      path: 'name/pubsub/cancel',
+      args: args,
+      qs: opts
+    }, transform, callback)
+  })
+}

Diff for: src/name/pubsub/index.js

@@ -0,0 +1,7 @@
+'use strict'
+
+module.exports = (send) => ({
+  cancel: require('./cancel')(send),
+  state: require('./state')(send),
+  subs: require('./subs')(send)
+})

Diff for: src/name/pubsub/state.js

@@ -0,0 +1,23 @@
+'use strict'
+
+const promisify = require('promisify-es6')
+
+const transform = function (res, callback) {
+  callback(null, {
+    enabled: res.Enabled
+  })
+}
+
+module.exports = (send) => {
+  return promisify((opts, callback) => {
+    if (typeof (opts) === 'function') {
+      callback = opts
+      opts = {}
+    }
+
+    send.andTransform({
+      path: 'name/pubsub/state',
+      qs: opts
+    }, transform, callback)
+  })
+}

Diff for: src/name/pubsub/subs.js

@@ -0,0 +1,21 @@
+'use strict'
+
+const promisify = require('promisify-es6')
+
+const transform = function (res, callback) {
+  callback(null, res.Strings || [])
+}
+
+module.exports = (send) => {
+  return promisify((opts, callback) => {
+    if (typeof (opts) === 'function') {
+      callback = opts
+      opts = {}
+    }
+
+    send.andTransform({
+      path: 'name/pubsub/subs',
+      qs: opts
+    }, transform, callback)
+  })
+}

Diff for: test/interface.spec.js

@@ -183,6 +183,27 @@ describe('interface-ipfs-core tests', () => {
     ]
   })
 
+  // TODO: uncomment after https://github.com/ipfs/interface-ipfs-core/pull/361 being merged and a new release
+  tests.namePubsub(CommonFactory.create({
+    spawnOptions: {
+      args: ['--enable-namesys-pubsub'],
+      initOptions: { bits: 1024 }
+    }
+  }), {
+    skip: [
+      // name.pubsub.cancel
+      {
+        name: 'should cancel a subscription correctly returning true',
+        reason: 'go-ipfs is really slow for publishing and resolving ipns records, unless in offline mode'
+      },
+      // name.pubsub.subs
+      {
+        name: 'should get the list of subscriptions updated after a resolve',
+        reason: 'go-ipfs is really slow for publishing and resolving ipns records, unless in offline mode'
+      }
+    ]
+  })
+
   tests.object(defaultCommonFactory)
 
   tests.pin(defaultCommonFactory)