Initial release, parse-server, 2.0.0

facebook.js

@@ -0,0 +1,52 @@
+// Helper functions for accessing the Facebook Graph API.
+var https = require('https');
+var Parse = require('parse/node').Parse;
+
+// Returns a promise that fulfills iff this user id is valid.
+function validateUserId(userId, access_token) {
+  return graphRequest('me?fields=id&access_token=' + access_token)
+    .then((data) => {
+      if (data && data.id == userId) {
+        return;
+      }
+      throw new Parse.Error(
+        Parse.Error.OBJECT_NOT_FOUND,
+        'Facebook auth is invalid for this user.');
+    });
+}
+
+// Returns a promise that fulfills iff this app id is valid.
+function validateAppId(appId, access_token) {
+  return graphRequest('app?access_token=' + access_token)
+    .then((data) => {
+      if (data && data.id == appId) {
+        return;
+      }
+      throw new Parse.Error(
+        Parse.Error.OBJECT_NOT_FOUND,
+        'Facebook auth is invalid for this user.');
+    });
+}
+
+// A promisey wrapper for FB graph requests.
+function graphRequest(path) {
+  return new Promise(function(resolve, reject) {
+    https.get('https://graph.facebook.com/v2.5/' + path, function(res) {
+      var data = '';
+      res.on('data', function(chunk) {
+        data += chunk;
+      });
+      res.on('end', function() {
+        data = JSON.parse(data);
+        resolve(data);
+      });
+    }).on('error', function(e) {
+      reject('Failed to validate this access token with Facebook.');
+    });
+  });
+}
+
+module.exports = {
+  validateAppId: validateAppId,
+  validateUserId: validateUserId
+};