feat(cloudapi): add metadata list resolver

packages/cloudapi-gql/package.json

@@ -13,6 +13,7 @@
     "prepublish": "echo 0"
   },
   "dependencies": {
+    "apr-awaitify": "^1.0.4",
     "bunyan": "^1.8.12",
     "cors": "^2.8.4",
     "dotenv": "^4.0.0",
@@ -22,6 +23,7 @@
     "graphql": "^0.11.2",
     "graphql-tools": "^1.2.2",
     "minimist": "^1.2.0",
+    "node-fetch": "^1.7.3",
     "smartdc-auth": "^2.5.5",
     "triton": "^5.3.1"
   },

packages/cloudapi-gql/src/api/machines.js

@@ -1,5 +1,19 @@
+const awaitify = require('apr-awaitify');
+const fetch = require('node-fetch');
+const url = require('url');
+
 const request = require('./request');
 
+const {
+  _path,
+  _getAuthHeaders,
+  account,
+  url: host
+} = request.client;
+
+const client = request.client;
+const getAuthHeaders = awaitify(_getAuthHeaders.bind(client));
+
 const snapshots = {
   list: ctx => {
     return request('listMachineSnapshots', ctx);
@@ -16,17 +30,21 @@ const snapshots = {
 };
 
 const metadata = {
-  list: ctx => {
+  list: async ({ id }) => {
-    return request('', ctx);
+    const pathname = _path.call(client, `/${account}/machines/${id}/metadata`);
+    const headers = await getAuthHeaders('GET', pathname);
+
+    const href = url.format({
+      protocol: 'https',
+      host: host.replace(/^https\:\/\//, ''),
+      pathname
+    });
+
+    return fetch(href, { method: 'GET', headers })
+      .then((response) => response.json());
   },
   get: ctx => {
-    return request('', ctx);
+    return request('getMachineMetadata', ctx);
-  },
-  update: ctx => {
-    return request('', ctx);
-  },
-  destroy: ctx => {
-    return request('', ctx);
   }
 };
 

packages/cloudapi-gql/src/schema/types/machine.js

@@ -1,6 +1,6 @@
+const api = require('../../api');
 const DynamicObjectType = require('./dynamic-object');
 const SnapshotType = require('./snapshot');
-const api = require('../../api');
 
 const {
   GraphQLBoolean,
@@ -48,7 +48,26 @@ module.exports = new GraphQLObjectType({
     },
     metadata: {
       type: DynamicObjectType,
-      description: 'Any additional metadata this instance has'
+      description: 'Any additional metadata this instance has',
+      args: {
+        name: {
+          type: GraphQLString,
+          description: 'Filter on the name of the metadata field'
+        }
+      },
+      resolve: (root, args) => {
+        const { metadata } = api.machines;
+        const { list, get } = metadata;
+
+        return args.name
+          ? get({
+              id: root.id,
+              key: args.name
+            }).then(value => ({
+              [args.name]: value
+            }))
+          : list({ id: root.id });
+      }
     },
     tags: {
       type: DynamicObjectType,