Auth Adapters refactoring (#3177)

* Moves all authentication providers to Adapter/Auth

* refactors specs

* Deprecates oauth option in favor of auth option

- Deprecates facebookAppIds option (in favor of auth.facebook.appIds)
- Adds warnings about the deprecated options

* nits

src/Adapters/Auth/janraincapture.js

@@ -0,0 +1,54 @@
+// Helper functions for accessing the Janrain Capture API.
+var https = require('https');
+var Parse = require('parse/node').Parse;
+var querystring = require('querystring');
+
+// Returns a promise that fulfills iff this user id is valid.
+function validateAuthData(authData, options) {
+  return request(options.janrain_capture_host, authData.access_token)
+    .then((data) => {
+      //successful response will have a "stat" (status) of 'ok' and a result node that stores the uuid, because that's all we asked for
+      //see: https://docs.janrain.com/api/registration/entity/#entity
+      if (data && data.stat == 'ok' && data.result == authData.id) {
+        return;
+      }
+      throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, 'Janrain capture auth is invalid for this user.');
+    });
+}
+
+// Returns a promise that fulfills iff this app id is valid.
+function validateAppId() {
+  //no-op
+  return Promise.resolve();
+}
+
+// A promisey wrapper for api requests
+function request(host, access_token) {
+
+  var query_string_data = querystring.stringify({
+    'access_token': access_token,
+    'attribute_name': 'uuid' // we only need to pull the uuid for this access token to make sure it matches
+  });
+
+  return new Promise(function(resolve, reject) {
+    https.get({
+      host: host,
+      path: '/entity?' + query_string_data
+    }, function(res) {
+      var data = '';
+      res.on('data', function(chunk) {
+        data += chunk;
+      });
+      res.on('end', function () {
+        resolve(JSON.parse(data));
+      });
+    }).on('error', function() {
+      reject('Failed to validate this access token with Janrain capture.');
+    });
+  });
+}
+
+module.exports = {
+  validateAppId: validateAppId,
+  validateAuthData: validateAuthData
+};