prepare 1.6.0 release (#74)

Author: eli-darkly

CHANGELOG.md

@@ -3,6 +3,10 @@
 All notable changes to the LaunchDarkly client-side JavaScript SDK will be documented in this file. This 
 project adheres to [Semantic Versioning](http://semver.org).
 
+## [1.6.0] - 2018-03-28
+### Changed
+- Added support for a future update to LaunchDarkly that will deliver individual feature flag changes over the streaming connection as they occur, rather than requiring the client to re-request all flags for each change.
+
 ## [1.5.2] - 2018-03-28
 ### Added
 - The new flush method on the client object tells the client to deliver any stored analytics events as soon as possible, rather than waiting for the regularly scheduled event-flushing interval.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ldclient-js",
-  "version": "1.5.2",
+  "version": "1.6.0",
   "description": "LaunchDarkly SDK for JavaScript",
   "author": "LaunchDarkly <[email protected]>",
   "license": "Apache-2.0",

src/Requestor.js

@@ -55,8 +55,12 @@ function Requestor(baseUrl, environment, useReport) {
     }
 
     var wrappedCallback = (function(currentCallback) {
-      return function() {
-        currentCallback.apply(null, arguments);
+      return function(error, result) {
+        // if we got flags, convert them to the more verbose format used by the eval stream
+        if (result) {
+          result = utils.transformValuesToVersionedValues(result);
+        }
+        currentCallback(error, result);
         flagSettingsRequest = null;
         lastFlagSettingsCallback = null;
       };

src/Stream.js

@@ -1,12 +1,29 @@
-function Stream(url, environment) {
+var utils = require('./utils');
+
+function Stream(baseUrl, environment, hash, useReport) {
   var stream = {};
-  var url = url + '/ping/' + environment;
+  var evalUrlPrefix = baseUrl + '/eval/' + environment + '/';
   var es = null;
 
-  stream.connect = function(onPing) {
+  stream.connect = function(user, handlers) {
     if (typeof EventSource !== 'undefined') {
+      var url;
+      if (useReport) {
+        // we don't yet have an EventSource implementation that supports REPORT, so
+        // fall back to the old ping-based stream
+        url = baseUrl + '/ping/' + environment;
+      } else {
+        url = evalUrlPrefix + utils.base64URLEncode(JSON.stringify(user));
+        if (hash !== null && hash !== undefined) {
+          url = url + '?h=' + hash;
+        }
+      }
       es = new window.EventSource(url);
-      es.addEventListener('ping', onPing);
+      for (var key in handlers) {
+        if (handlers.hasOwnProperty(key)) {
+          es.addEventListener(key, handlers[key]);
+        }
+      }
     }
   }