displayer-api-client

Example

  var DisplayerAPI = require("displayer-api-client");
  var api = new DisplayerAPI("http://backpack.openbadges.org");

  var user = api.user("[email protected]");

  user.id(function (err, id) {
    console.log("Looked up user id, and it is", id);
  });

  user.groups(function (err, groups) {
    console.log("Looked up user groups, and they are", groups);
  });

  user.group(10, function (err, badges) {
    console.log("Looked up group 10, and the badges in it are", badges);
  });

ID lookups are cached, but group lookups are not. You may also provide the user id if known to skip that step, like so:

  var user = api.user({
    id: 1,
    email: "[email protected]"
  });

Callback Styles

All of the user methods support three styles of invocation:

  user.id(function callback (err, id) {});                        // node style callback
  user.id(function success (id) {}, function failure (err) {});   // success/failure style callbacks
  var idPromise = user.id();                                      // promises 

If additional arguments are needed, they preceed the callbacks (if any).

Promises are implemented by bluebird.

Streams

There are two additional methods that return JSONStream streams:

  var g = user.getGroupStream();
  g.on("data", function (data) {
    console.log("A group:", data);
  });

  var b = user.getBadgeStream(10);
  b.on("data", function (data) {
    console.log("A badge in group 10:", data);
  });